/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-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 23:13:02,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 23:13:02,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 23:13:02,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 23:13:02,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 23:13:02,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 23:13:02,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 23:13:02,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 23:13:02,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 23:13:02,234 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 23:13:02,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 23:13:02,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 23:13:02,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 23:13:02,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 23:13:02,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 23:13:02,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 23:13:02,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 23:13:02,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 23:13:02,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 23:13:02,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 23:13:02,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 23:13:02,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 23:13:02,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 23:13:02,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 23:13:02,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 23:13:02,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 23:13:02,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 23:13:02,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 23:13:02,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 23:13:02,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 23:13:02,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 23:13:02,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 23:13:02,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 23:13:02,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 23:13:02,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 23:13:02,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 23:13:02,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 23:13:02,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 23:13:02,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 23:13:02,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 23:13:02,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 23:13:02,269 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 23:13:02,286 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 23:13:02,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 23:13:02,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 23:13:02,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 23:13:02,289 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 23:13:02,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 23:13:02,289 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 23:13:02,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 23:13:02,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 23:13:02,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 23:13:02,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 23:13:02,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 23:13:02,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 23:13:02,292 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 23:13:02,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 23:13:02,293 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 23:13:02,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 23:13:02,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 23:13:02,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 23:13:02,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 23:13:02,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 23:13:02,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 23:13:02,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 23:13:02,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 23:13:02,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 23:13:02,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 23:13:02,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 23:13:02,295 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 23:13:02,296 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 23:13:02,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 23:13:02,298 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 23:13:02,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 23:13:02,560 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 23:13:02,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 23:13:02,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 23:13:02,580 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 23:13:02,581 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 23:13:02,582 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2019-12-27 23:13:02,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72dbcf15b/5df328ce0570457eaf13eaf57a543b83/FLAGfb829986a [2019-12-27 23:13:03,224 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 23:13:03,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2019-12-27 23:13:03,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72dbcf15b/5df328ce0570457eaf13eaf57a543b83/FLAGfb829986a [2019-12-27 23:13:03,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72dbcf15b/5df328ce0570457eaf13eaf57a543b83 [2019-12-27 23:13:03,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 23:13:03,508 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 23:13:03,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 23:13:03,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 23:13:03,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 23:13:03,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:13:03" (1/1) ... [2019-12-27 23:13:03,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b01ee4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:03, skipping insertion in model container [2019-12-27 23:13:03,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:13:03" (1/1) ... [2019-12-27 23:13:03,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 23:13:03,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 23:13:04,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 23:13:04,286 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 23:13:04,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 23:13:04,558 INFO L208 MainTranslator]: Completed translation [2019-12-27 23:13:04,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04 WrapperNode [2019-12-27 23:13:04,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 23:13:04,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 23:13:04,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 23:13:04,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 23:13:04,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (1/1) ... [2019-12-27 23:13:04,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (1/1) ... [2019-12-27 23:13:04,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 23:13:04,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 23:13:04,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 23:13:04,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 23:13:04,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (1/1) ... [2019-12-27 23:13:04,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (1/1) ... [2019-12-27 23:13:04,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (1/1) ... [2019-12-27 23:13:04,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (1/1) ... [2019-12-27 23:13:04,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (1/1) ... [2019-12-27 23:13:04,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (1/1) ... [2019-12-27 23:13:04,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (1/1) ... [2019-12-27 23:13:04,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 23:13:04,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 23:13:04,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 23:13:04,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 23:13:04,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (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 23:13:04,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 23:13:04,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 23:13:04,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-27 23:13:04,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2019-12-27 23:13:04,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2019-12-27 23:13:04,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 23:13:04,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 23:13:04,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 23:13:04,743 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 23:13:05,195 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 23:13:05,195 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-27 23:13:05,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:13:05 BoogieIcfgContainer [2019-12-27 23:13:05,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 23:13:05,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 23:13:05,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 23:13:05,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 23:13:05,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:13:03" (1/3) ... [2019-12-27 23:13:05,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b3a4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:13:05, skipping insertion in model container [2019-12-27 23:13:05,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:13:04" (2/3) ... [2019-12-27 23:13:05,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b3a4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:13:05, skipping insertion in model container [2019-12-27 23:13:05,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:13:05" (3/3) ... [2019-12-27 23:13:05,209 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2019-12-27 23:13:05,219 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 23:13:05,220 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 23:13:05,228 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 23:13:05,229 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 23:13:05,252 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,252 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,252 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,253 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,253 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,253 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,253 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,254 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,254 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,254 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,255 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,255 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,255 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,255 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,256 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,256 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,256 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,256 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,257 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,257 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,257 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,261 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,261 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,261 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,262 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,262 WARN L315 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,262 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,262 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,262 WARN L315 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 23:13:05,291 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-12-27 23:13:05,308 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 23:13:05,309 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 23:13:05,309 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 23:13:05,309 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 23:13:05,309 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 23:13:05,309 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 23:13:05,309 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 23:13:05,310 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 23:13:05,324 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions [2019-12-27 23:13:05,326 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions [2019-12-27 23:13:05,402 INFO L132 PetriNetUnfolder]: 7/84 cut-off events. [2019-12-27 23:13:05,402 INFO L133 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2019-12-27 23:13:05,410 INFO L76 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2019-12-27 23:13:05,412 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions [2019-12-27 23:13:05,435 INFO L132 PetriNetUnfolder]: 7/84 cut-off events. [2019-12-27 23:13:05,436 INFO L133 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2019-12-27 23:13:05,437 INFO L76 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2019-12-27 23:13:05,438 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 640 [2019-12-27 23:13:05,440 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 23:13:06,822 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-12-27 23:13:07,056 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-12-27 23:13:07,561 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2019-12-27 23:13:07,778 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2019-12-27 23:13:08,215 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2019-12-27 23:13:08,564 WARN L192 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-12-27 23:13:09,820 WARN L192 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2019-12-27 23:13:10,280 WARN L192 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2019-12-27 23:13:10,284 INFO L206 etLargeBlockEncoding]: Checked pairs total: 510 [2019-12-27 23:13:10,284 INFO L214 etLargeBlockEncoding]: Total number of compositions: 77 [2019-12-27 23:13:10,288 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 13 transitions [2019-12-27 23:13:10,296 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2019-12-27 23:13:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-12-27 23:13:10,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 23:13:10,304 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:10,305 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:10,306 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:10,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1101690005, now seen corresponding path program 1 times [2019-12-27 23:13:10,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:10,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059566981] [2019-12-27 23:13:10,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:10,525 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 23:13:10,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059566981] [2019-12-27 23:13:10,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 23:13:10,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 23:13:10,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [894414677] [2019-12-27 23:13:10,529 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:10,535 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:10,550 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 16 transitions. [2019-12-27 23:13:10,551 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:10,558 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:10,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 23:13:10,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 23:13:10,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 23:13:10,577 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-12-27 23:13:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:10,615 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2019-12-27 23:13:10,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 23:13:10,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-27 23:13:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:10,632 INFO L225 Difference]: With dead ends: 20 [2019-12-27 23:13:10,632 INFO L226 Difference]: Without dead ends: 20 [2019-12-27 23:13:10,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:13:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-27 23:13:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-27 23:13:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-27 23:13:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2019-12-27 23:13:10,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2019-12-27 23:13:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:10,679 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2019-12-27 23:13:10,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 23:13:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2019-12-27 23:13:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 23:13:10,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:10,684 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:10,684 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash -176981712, now seen corresponding path program 1 times [2019-12-27 23:13:10,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:10,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955234778] [2019-12-27 23:13:10,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:10,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955234778] [2019-12-27 23:13:10,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 23:13:10,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 23:13:10,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [911992501] [2019-12-27 23:13:10,774 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:10,774 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:10,780 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 23:13:10,780 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:10,810 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:13:10,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 23:13:10,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:10,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 23:13:10,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 23:13:10,815 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 5 states. [2019-12-27 23:13:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:10,975 INFO L93 Difference]: Finished difference Result 34 states and 64 transitions. [2019-12-27 23:13:10,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 23:13:10,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 23:13:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:10,976 INFO L225 Difference]: With dead ends: 34 [2019-12-27 23:13:10,976 INFO L226 Difference]: Without dead ends: 34 [2019-12-27 23:13:10,977 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-12-27 23:13:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-27 23:13:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-12-27 23:13:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-27 23:13:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2019-12-27 23:13:10,983 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 9 [2019-12-27 23:13:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:10,984 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2019-12-27 23:13:10,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 23:13:10,984 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2019-12-27 23:13:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 23:13:10,984 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:10,985 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:10,985 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash -737201816, now seen corresponding path program 1 times [2019-12-27 23:13:10,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:10,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834737397] [2019-12-27 23:13:10,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:11,100 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 23:13:11,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834737397] [2019-12-27 23:13:11,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214330806] [2019-12-27 23:13:11,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:11,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:11,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:13:11,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:11,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2019-12-27 23:13:11,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [523765388] [2019-12-27 23:13:11,219 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:11,221 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:11,224 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 23:13:11,224 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:11,225 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:11,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 23:13:11,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 23:13:11,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 23:13:11,226 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand 7 states. [2019-12-27 23:13:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:11,333 INFO L93 Difference]: Finished difference Result 85 states and 161 transitions. [2019-12-27 23:13:11,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 23:13:11,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-27 23:13:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:11,336 INFO L225 Difference]: With dead ends: 85 [2019-12-27 23:13:11,337 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 23:13:11,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 23:13:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 43. [2019-12-27 23:13:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-27 23:13:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 90 transitions. [2019-12-27 23:13:11,346 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 90 transitions. Word has length 12 [2019-12-27 23:13:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:11,347 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 90 transitions. [2019-12-27 23:13:11,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 23:13:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 90 transitions. [2019-12-27 23:13:11,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 23:13:11,348 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:11,349 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:11,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:11,550 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash 888177128, now seen corresponding path program 2 times [2019-12-27 23:13:11,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:11,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036515830] [2019-12-27 23:13:11,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:11,668 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 23:13:11,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036515830] [2019-12-27 23:13:11,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063777214] [2019-12-27 23:13:11,669 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 23:13:11,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:11,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:11,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:11,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:11,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:11,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 23:13:11,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1661680471] [2019-12-27 23:13:11,773 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:11,774 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:11,776 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 23:13:11,777 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:11,815 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:13:11,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:13:11,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:11,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:13:11,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:13:11,817 INFO L87 Difference]: Start difference. First operand 43 states and 90 transitions. Second operand 9 states. [2019-12-27 23:13:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:12,003 INFO L93 Difference]: Finished difference Result 90 states and 177 transitions. [2019-12-27 23:13:12,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:13:12,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 23:13:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:12,005 INFO L225 Difference]: With dead ends: 90 [2019-12-27 23:13:12,005 INFO L226 Difference]: Without dead ends: 88 [2019-12-27 23:13:12,006 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:13:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-27 23:13:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2019-12-27 23:13:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-27 23:13:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 103 transitions. [2019-12-27 23:13:12,014 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 103 transitions. Word has length 12 [2019-12-27 23:13:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:12,016 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 103 transitions. [2019-12-27 23:13:12,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:13:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 103 transitions. [2019-12-27 23:13:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 23:13:12,017 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:12,017 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:12,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:12,219 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:12,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:12,219 INFO L82 PathProgramCache]: Analyzing trace with hash 445777256, now seen corresponding path program 3 times [2019-12-27 23:13:12,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:12,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919867411] [2019-12-27 23:13:12,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:12,294 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 23:13:12,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919867411] [2019-12-27 23:13:12,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367722161] [2019-12-27 23:13:12,295 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 23:13:12,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 23:13:12,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:12,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:12,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:12,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:12,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2019-12-27 23:13:12,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1727037779] [2019-12-27 23:13:12,393 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:12,394 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:12,395 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 23:13:12,395 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:12,397 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:12,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 23:13:12,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:12,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 23:13:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 23:13:12,399 INFO L87 Difference]: Start difference. First operand 49 states and 103 transitions. Second operand 7 states. [2019-12-27 23:13:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:12,527 INFO L93 Difference]: Finished difference Result 93 states and 189 transitions. [2019-12-27 23:13:12,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 23:13:12,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-27 23:13:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:12,529 INFO L225 Difference]: With dead ends: 93 [2019-12-27 23:13:12,529 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 23:13:12,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:12,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 23:13:12,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 50. [2019-12-27 23:13:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 23:13:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 106 transitions. [2019-12-27 23:13:12,537 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 106 transitions. Word has length 12 [2019-12-27 23:13:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:12,537 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 106 transitions. [2019-12-27 23:13:12,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 23:13:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 106 transitions. [2019-12-27 23:13:12,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 23:13:12,538 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:12,538 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:12,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:12,743 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:12,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1348053315, now seen corresponding path program 4 times [2019-12-27 23:13:12,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:12,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902960626] [2019-12-27 23:13:12,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:12,827 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 23:13:12,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902960626] [2019-12-27 23:13:12,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004464297] [2019-12-27 23:13:12,828 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:12,894 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:12,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:12,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:12,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:13:12,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:12,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2019-12-27 23:13:12,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1609223380] [2019-12-27 23:13:12,922 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:12,923 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:12,926 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 23:13:12,926 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:12,926 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:12,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 23:13:12,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 23:13:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 23:13:12,928 INFO L87 Difference]: Start difference. First operand 50 states and 106 transitions. Second operand 8 states. [2019-12-27 23:13:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:13,061 INFO L93 Difference]: Finished difference Result 105 states and 215 transitions. [2019-12-27 23:13:13,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:13:13,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 23:13:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:13,063 INFO L225 Difference]: With dead ends: 105 [2019-12-27 23:13:13,063 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 23:13:13,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:13:13,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 23:13:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 53. [2019-12-27 23:13:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 23:13:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2019-12-27 23:13:13,071 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 13 [2019-12-27 23:13:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:13,071 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2019-12-27 23:13:13,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 23:13:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2019-12-27 23:13:13,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 23:13:13,072 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:13,072 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:13,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:13,276 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash 488620291, now seen corresponding path program 5 times [2019-12-27 23:13:13,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:13,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932257663] [2019-12-27 23:13:13,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:13,368 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 23:13:13,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932257663] [2019-12-27 23:13:13,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131637180] [2019-12-27 23:13:13,369 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:13,441 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:13:13,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:13,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:13:13,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:13,453 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 23:13:13,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:13,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 23:13:13,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1191208127] [2019-12-27 23:13:13,455 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:13,456 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:13,458 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 23:13:13,459 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:13,487 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:13:13,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:13,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:13,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-12-27 23:13:13,489 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand 10 states. [2019-12-27 23:13:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:13,640 INFO L93 Difference]: Finished difference Result 109 states and 227 transitions. [2019-12-27 23:13:13,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:13:13,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-27 23:13:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:13,641 INFO L225 Difference]: With dead ends: 109 [2019-12-27 23:13:13,641 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 23:13:13,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:13:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 23:13:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 55. [2019-12-27 23:13:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 23:13:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 120 transitions. [2019-12-27 23:13:13,648 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 120 transitions. Word has length 13 [2019-12-27 23:13:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:13,648 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 120 transitions. [2019-12-27 23:13:13,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 120 transitions. [2019-12-27 23:13:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 23:13:13,650 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:13,650 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:13,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:13,853 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:13,854 INFO L82 PathProgramCache]: Analyzing trace with hash 46220419, now seen corresponding path program 6 times [2019-12-27 23:13:13,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:13,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904096108] [2019-12-27 23:13:13,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:13,920 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 23:13:13,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904096108] [2019-12-27 23:13:13,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374212276] [2019-12-27 23:13:13,921 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:13,987 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 23:13:13,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:13,988 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:13,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:13:14,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:14,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2019-12-27 23:13:14,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [892089861] [2019-12-27 23:13:14,016 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:14,017 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:14,019 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 23:13:14,019 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:14,023 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:14,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 23:13:14,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:14,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 23:13:14,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 23:13:14,028 INFO L87 Difference]: Start difference. First operand 55 states and 120 transitions. Second operand 8 states. [2019-12-27 23:13:14,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:14,134 INFO L93 Difference]: Finished difference Result 110 states and 231 transitions. [2019-12-27 23:13:14,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:13:14,135 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 23:13:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:14,136 INFO L225 Difference]: With dead ends: 110 [2019-12-27 23:13:14,136 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 23:13:14,137 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:13:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 23:13:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 55. [2019-12-27 23:13:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 23:13:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 120 transitions. [2019-12-27 23:13:14,143 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 120 transitions. Word has length 13 [2019-12-27 23:13:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:14,144 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 120 transitions. [2019-12-27 23:13:14,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 23:13:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 120 transitions. [2019-12-27 23:13:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 23:13:14,145 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:14,145 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:14,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:14,346 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash 964559549, now seen corresponding path program 7 times [2019-12-27 23:13:14,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:14,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692174888] [2019-12-27 23:13:14,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:14,459 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 23:13:14,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692174888] [2019-12-27 23:13:14,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958577523] [2019-12-27 23:13:14,460 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:14,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:14,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:13:14,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:14,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 10 [2019-12-27 23:13:14,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [261324011] [2019-12-27 23:13:14,581 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:14,586 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:14,588 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 23:13:14,589 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:14,590 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:14,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 23:13:14,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:14,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 23:13:14,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 23:13:14,591 INFO L87 Difference]: Start difference. First operand 55 states and 120 transitions. Second operand 8 states. [2019-12-27 23:13:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:14,739 INFO L93 Difference]: Finished difference Result 113 states and 236 transitions. [2019-12-27 23:13:14,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 23:13:14,739 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 23:13:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:14,740 INFO L225 Difference]: With dead ends: 113 [2019-12-27 23:13:14,740 INFO L226 Difference]: Without dead ends: 111 [2019-12-27 23:13:14,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:13:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-12-27 23:13:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 55. [2019-12-27 23:13:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 23:13:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 120 transitions. [2019-12-27 23:13:14,751 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 120 transitions. Word has length 13 [2019-12-27 23:13:14,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:14,751 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 120 transitions. [2019-12-27 23:13:14,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 23:13:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 120 transitions. [2019-12-27 23:13:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:14,754 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:14,754 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:14,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:14,955 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:14,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1393636837, now seen corresponding path program 8 times [2019-12-27 23:13:14,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:14,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104685878] [2019-12-27 23:13:14,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:15,048 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 23:13:15,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104685878] [2019-12-27 23:13:15,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22107298] [2019-12-27 23:13:15,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:15,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:15,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:15,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:15,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:13:15,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:15,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 23:13:15,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [549332603] [2019-12-27 23:13:15,157 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:15,159 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:15,160 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 23:13:15,160 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:15,161 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:15,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:13:15,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:15,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:13:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:13:15,162 INFO L87 Difference]: Start difference. First operand 55 states and 120 transitions. Second operand 9 states. [2019-12-27 23:13:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:15,333 INFO L93 Difference]: Finished difference Result 160 states and 320 transitions. [2019-12-27 23:13:15,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:13:15,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 23:13:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:15,336 INFO L225 Difference]: With dead ends: 160 [2019-12-27 23:13:15,337 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 23:13:15,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:13:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 23:13:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2019-12-27 23:13:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 23:13:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 135 transitions. [2019-12-27 23:13:15,343 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 135 transitions. Word has length 14 [2019-12-27 23:13:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:15,344 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 135 transitions. [2019-12-27 23:13:15,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:13:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 135 transitions. [2019-12-27 23:13:15,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:15,345 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:15,345 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:15,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:15,557 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:15,557 INFO L82 PathProgramCache]: Analyzing trace with hash 231742107, now seen corresponding path program 9 times [2019-12-27 23:13:15,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:15,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95036175] [2019-12-27 23:13:15,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:15,631 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 23:13:15,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95036175] [2019-12-27 23:13:15,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99280457] [2019-12-27 23:13:15,633 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:15,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:13:15,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:15,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:15,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:13:15,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:15,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 23:13:15,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [897759838] [2019-12-27 23:13:15,783 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:15,786 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:15,788 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 23:13:15,790 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:15,828 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:15,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:15,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:15,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:15,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:15,830 INFO L87 Difference]: Start difference. First operand 62 states and 135 transitions. Second operand 11 states. [2019-12-27 23:13:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:16,113 INFO L93 Difference]: Finished difference Result 145 states and 298 transitions. [2019-12-27 23:13:16,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 23:13:16,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 23:13:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:16,115 INFO L225 Difference]: With dead ends: 145 [2019-12-27 23:13:16,115 INFO L226 Difference]: Without dead ends: 143 [2019-12-27 23:13:16,115 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:13:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-27 23:13:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 66. [2019-12-27 23:13:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-27 23:13:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 148 transitions. [2019-12-27 23:13:16,128 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 148 transitions. Word has length 14 [2019-12-27 23:13:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:16,129 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 148 transitions. [2019-12-27 23:13:16,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 148 transitions. [2019-12-27 23:13:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:16,133 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:16,133 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:16,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:16,342 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1190386696, now seen corresponding path program 10 times [2019-12-27 23:13:16,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:16,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527180004] [2019-12-27 23:13:16,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:16,405 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 23:13:16,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527180004] [2019-12-27 23:13:16,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985771420] [2019-12-27 23:13:16,406 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:16,467 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:16,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:16,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:16,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:13:16,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:16,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2019-12-27 23:13:16,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1140329337] [2019-12-27 23:13:16,493 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:16,494 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:16,496 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 23:13:16,496 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:16,496 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:16,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:13:16,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:16,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:13:16,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 23:13:16,498 INFO L87 Difference]: Start difference. First operand 66 states and 148 transitions. Second operand 9 states. [2019-12-27 23:13:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:16,627 INFO L93 Difference]: Finished difference Result 126 states and 266 transitions. [2019-12-27 23:13:16,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:13:16,627 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 23:13:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:16,628 INFO L225 Difference]: With dead ends: 126 [2019-12-27 23:13:16,629 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 23:13:16,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:13:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 23:13:16,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 67. [2019-12-27 23:13:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 23:13:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 149 transitions. [2019-12-27 23:13:16,634 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 149 transitions. Word has length 14 [2019-12-27 23:13:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:16,634 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 149 transitions. [2019-12-27 23:13:16,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:13:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 149 transitions. [2019-12-27 23:13:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:16,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:16,635 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:16,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:16,836 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash -210657765, now seen corresponding path program 11 times [2019-12-27 23:13:16,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:16,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179252279] [2019-12-27 23:13:16,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:16,896 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 23:13:16,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179252279] [2019-12-27 23:13:16,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015813467] [2019-12-27 23:13:16,897 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:16,945 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:16,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:16,946 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:16,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:16,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:16,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 23:13:16,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [304824491] [2019-12-27 23:13:16,975 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:16,976 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:16,977 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 23:13:16,978 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:16,978 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:16,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:13:16,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:16,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:13:16,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:13:16,979 INFO L87 Difference]: Start difference. First operand 67 states and 149 transitions. Second operand 9 states. [2019-12-27 23:13:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:17,157 INFO L93 Difference]: Finished difference Result 148 states and 307 transitions. [2019-12-27 23:13:17,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 23:13:17,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 23:13:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:17,159 INFO L225 Difference]: With dead ends: 148 [2019-12-27 23:13:17,159 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 23:13:17,160 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:13:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 23:13:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 67. [2019-12-27 23:13:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 23:13:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 149 transitions. [2019-12-27 23:13:17,165 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 149 transitions. Word has length 14 [2019-12-27 23:13:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:17,165 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 149 transitions. [2019-12-27 23:13:17,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:13:17,165 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 149 transitions. [2019-12-27 23:13:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:17,166 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:17,166 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:17,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:17,367 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:17,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1147188453, now seen corresponding path program 12 times [2019-12-27 23:13:17,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:17,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80219541] [2019-12-27 23:13:17,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:17,425 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 23:13:17,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80219541] [2019-12-27 23:13:17,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978694827] [2019-12-27 23:13:17,426 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:17,500 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:13:17,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:17,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:17,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:17,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:17,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 23:13:17,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1781122584] [2019-12-27 23:13:17,532 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:17,533 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:17,536 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 23:13:17,537 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:17,604 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:13:17,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:13:17,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:17,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:13:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:17,606 INFO L87 Difference]: Start difference. First operand 67 states and 149 transitions. Second operand 13 states. [2019-12-27 23:13:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:18,003 INFO L93 Difference]: Finished difference Result 175 states and 367 transitions. [2019-12-27 23:13:18,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:13:18,004 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-12-27 23:13:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:18,006 INFO L225 Difference]: With dead ends: 175 [2019-12-27 23:13:18,006 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 23:13:18,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:13:18,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 23:13:18,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 75. [2019-12-27 23:13:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 23:13:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 168 transitions. [2019-12-27 23:13:18,012 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 168 transitions. Word has length 14 [2019-12-27 23:13:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:18,013 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 168 transitions. [2019-12-27 23:13:18,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:13:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 168 transitions. [2019-12-27 23:13:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:18,014 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:18,014 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:18,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:18,218 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:18,219 INFO L82 PathProgramCache]: Analyzing trace with hash 987260232, now seen corresponding path program 13 times [2019-12-27 23:13:18,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:18,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958746615] [2019-12-27 23:13:18,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:18,279 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 23:13:18,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958746615] [2019-12-27 23:13:18,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93766851] [2019-12-27 23:13:18,280 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:18,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:13:18,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:18,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:18,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 23:13:18,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [570575738] [2019-12-27 23:13:18,418 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:18,420 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:18,424 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 23:13:18,424 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:18,473 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:13:18,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:18,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:18,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:18,474 INFO L87 Difference]: Start difference. First operand 75 states and 168 transitions. Second operand 11 states. [2019-12-27 23:13:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:18,671 INFO L93 Difference]: Finished difference Result 152 states and 326 transitions. [2019-12-27 23:13:18,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 23:13:18,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 23:13:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:18,672 INFO L225 Difference]: With dead ends: 152 [2019-12-27 23:13:18,672 INFO L226 Difference]: Without dead ends: 150 [2019-12-27 23:13:18,673 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:13:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-12-27 23:13:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 77. [2019-12-27 23:13:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-27 23:13:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 174 transitions. [2019-12-27 23:13:18,677 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 174 transitions. Word has length 14 [2019-12-27 23:13:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:18,677 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 174 transitions. [2019-12-27 23:13:18,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 174 transitions. [2019-12-27 23:13:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:18,678 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:18,678 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:18,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:18,882 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash 544860360, now seen corresponding path program 14 times [2019-12-27 23:13:18,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:18,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947477279] [2019-12-27 23:13:18,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:18,960 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 23:13:18,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947477279] [2019-12-27 23:13:18,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611551898] [2019-12-27 23:13:18,961 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:19,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:19,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:19,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:19,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:19,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:19,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2019-12-27 23:13:19,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1787370621] [2019-12-27 23:13:19,057 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:19,057 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:19,059 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 23:13:19,060 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:19,061 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:13:19,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:13:19,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:19,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:13:19,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 23:13:19,062 INFO L87 Difference]: Start difference. First operand 77 states and 174 transitions. Second operand 9 states. [2019-12-27 23:13:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:19,185 INFO L93 Difference]: Finished difference Result 150 states and 324 transitions. [2019-12-27 23:13:19,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:13:19,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 23:13:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:19,186 INFO L225 Difference]: With dead ends: 150 [2019-12-27 23:13:19,186 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 23:13:19,187 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:13:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 23:13:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 77. [2019-12-27 23:13:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-27 23:13:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 174 transitions. [2019-12-27 23:13:19,191 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 174 transitions. Word has length 14 [2019-12-27 23:13:19,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:19,191 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 174 transitions. [2019-12-27 23:13:19,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:13:19,191 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 174 transitions. [2019-12-27 23:13:19,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:19,192 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:19,192 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:19,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:19,395 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:19,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:19,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1463199490, now seen corresponding path program 15 times [2019-12-27 23:13:19,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:19,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273879424] [2019-12-27 23:13:19,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:19,462 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 23:13:19,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273879424] [2019-12-27 23:13:19,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471022183] [2019-12-27 23:13:19,463 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:19,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:13:19,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:19,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:19,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:19,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:19,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2019-12-27 23:13:19,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1495151368] [2019-12-27 23:13:19,576 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:19,577 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:19,579 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 23:13:19,579 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:19,580 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:19,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:13:19,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:13:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 23:13:19,582 INFO L87 Difference]: Start difference. First operand 77 states and 174 transitions. Second operand 9 states. [2019-12-27 23:13:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:19,722 INFO L93 Difference]: Finished difference Result 147 states and 321 transitions. [2019-12-27 23:13:19,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:13:19,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 23:13:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:19,723 INFO L225 Difference]: With dead ends: 147 [2019-12-27 23:13:19,723 INFO L226 Difference]: Without dead ends: 145 [2019-12-27 23:13:19,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:13:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-12-27 23:13:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2019-12-27 23:13:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-12-27 23:13:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 167 transitions. [2019-12-27 23:13:19,731 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 167 transitions. Word has length 14 [2019-12-27 23:13:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:19,731 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 167 transitions. [2019-12-27 23:13:19,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:13:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 167 transitions. [2019-12-27 23:13:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:19,732 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:19,732 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:19,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:19,933 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1091703141, now seen corresponding path program 16 times [2019-12-27 23:13:19,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:19,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598546825] [2019-12-27 23:13:19,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:19,986 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 23:13:19,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598546825] [2019-12-27 23:13:19,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996297629] [2019-12-27 23:13:19,987 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:20,040 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:20,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:20,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:20,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:20,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:20,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 23:13:20,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1388193898] [2019-12-27 23:13:20,079 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:20,080 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:20,082 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 23:13:20,085 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:20,108 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:13:20,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:20,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:20,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:20,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:20,109 INFO L87 Difference]: Start difference. First operand 75 states and 167 transitions. Second operand 11 states. [2019-12-27 23:13:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:20,332 INFO L93 Difference]: Finished difference Result 174 states and 367 transitions. [2019-12-27 23:13:20,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:13:20,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-12-27 23:13:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:20,334 INFO L225 Difference]: With dead ends: 174 [2019-12-27 23:13:20,334 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 23:13:20,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:13:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 23:13:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 78. [2019-12-27 23:13:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-27 23:13:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 178 transitions. [2019-12-27 23:13:20,339 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 178 transitions. Word has length 14 [2019-12-27 23:13:20,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:20,339 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 178 transitions. [2019-12-27 23:13:20,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 178 transitions. [2019-12-27 23:13:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:20,340 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:20,340 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:20,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:20,547 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -133058552, now seen corresponding path program 17 times [2019-12-27 23:13:20,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:20,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78719523] [2019-12-27 23:13:20,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:20,598 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 23:13:20,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78719523] [2019-12-27 23:13:20,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979865701] [2019-12-27 23:13:20,598 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:20,667 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:13:20,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:20,668 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:20,670 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:13:20,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:20,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2019-12-27 23:13:20,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2123383332] [2019-12-27 23:13:20,692 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:20,693 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:20,694 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 23:13:20,694 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:20,695 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:20,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:13:20,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:20,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:13:20,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-27 23:13:20,697 INFO L87 Difference]: Start difference. First operand 78 states and 178 transitions. Second operand 9 states. [2019-12-27 23:13:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:20,817 INFO L93 Difference]: Finished difference Result 153 states and 328 transitions. [2019-12-27 23:13:20,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 23:13:20,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 23:13:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:20,819 INFO L225 Difference]: With dead ends: 153 [2019-12-27 23:13:20,819 INFO L226 Difference]: Without dead ends: 151 [2019-12-27 23:13:20,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:13:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-12-27 23:13:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 77. [2019-12-27 23:13:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-12-27 23:13:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 174 transitions. [2019-12-27 23:13:20,823 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 174 transitions. Word has length 14 [2019-12-27 23:13:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:20,824 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 174 transitions. [2019-12-27 23:13:20,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:13:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 174 transitions. [2019-12-27 23:13:20,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 23:13:20,825 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:20,825 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:21,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:21,029 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1534103013, now seen corresponding path program 18 times [2019-12-27 23:13:21,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:21,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121522065] [2019-12-27 23:13:21,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:21,075 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 23:13:21,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121522065] [2019-12-27 23:13:21,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448217084] [2019-12-27 23:13:21,076 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:21,152 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:13:21,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:21,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:21,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:21,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:21,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2019-12-27 23:13:21,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [138860185] [2019-12-27 23:13:21,184 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:21,185 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:21,186 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 23:13:21,187 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:21,187 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:21,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 23:13:21,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:21,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 23:13:21,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:13:21,188 INFO L87 Difference]: Start difference. First operand 77 states and 174 transitions. Second operand 9 states. [2019-12-27 23:13:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:21,364 INFO L93 Difference]: Finished difference Result 166 states and 352 transitions. [2019-12-27 23:13:21,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:13:21,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-12-27 23:13:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:21,366 INFO L225 Difference]: With dead ends: 166 [2019-12-27 23:13:21,366 INFO L226 Difference]: Without dead ends: 164 [2019-12-27 23:13:21,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:13:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-27 23:13:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 74. [2019-12-27 23:13:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 23:13:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 165 transitions. [2019-12-27 23:13:21,370 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 165 transitions. Word has length 14 [2019-12-27 23:13:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:21,371 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 165 transitions. [2019-12-27 23:13:21,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 23:13:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 165 transitions. [2019-12-27 23:13:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:21,371 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:21,372 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:21,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:21,575 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:21,576 INFO L82 PathProgramCache]: Analyzing trace with hash -222702486, now seen corresponding path program 19 times [2019-12-27 23:13:21,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:21,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473008588] [2019-12-27 23:13:21,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:21,651 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 23:13:21,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473008588] [2019-12-27 23:13:21,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515311700] [2019-12-27 23:13:21,652 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:21,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:21,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:13:21,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:21,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 23:13:21,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1610000195] [2019-12-27 23:13:21,753 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:21,754 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:21,756 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 35 transitions. [2019-12-27 23:13:21,756 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:21,756 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:21,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:21,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:21,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:21,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:21,757 INFO L87 Difference]: Start difference. First operand 74 states and 165 transitions. Second operand 10 states. [2019-12-27 23:13:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:21,952 INFO L93 Difference]: Finished difference Result 191 states and 390 transitions. [2019-12-27 23:13:21,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:13:21,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:21,954 INFO L225 Difference]: With dead ends: 191 [2019-12-27 23:13:21,954 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 23:13:21,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:13:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 23:13:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 76. [2019-12-27 23:13:21,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 23:13:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 172 transitions. [2019-12-27 23:13:21,958 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 172 transitions. Word has length 15 [2019-12-27 23:13:21,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:21,959 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 172 transitions. [2019-12-27 23:13:21,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:21,959 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 172 transitions. [2019-12-27 23:13:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:21,960 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:21,960 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:22,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:22,163 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:22,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:22,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1613971120, now seen corresponding path program 20 times [2019-12-27 23:13:22,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:22,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104322706] [2019-12-27 23:13:22,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:22,247 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 23:13:22,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104322706] [2019-12-27 23:13:22,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477348823] [2019-12-27 23:13:22,248 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:22,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:22,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:22,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:22,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:22,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:22,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 23:13:22,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [944570890] [2019-12-27 23:13:22,438 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:22,442 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:22,446 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 23:13:22,446 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:22,499 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:22,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:22,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:22,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:22,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:22,501 INFO L87 Difference]: Start difference. First operand 76 states and 172 transitions. Second operand 12 states. [2019-12-27 23:13:22,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:22,846 INFO L93 Difference]: Finished difference Result 191 states and 409 transitions. [2019-12-27 23:13:22,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:13:22,847 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 23:13:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:22,848 INFO L225 Difference]: With dead ends: 191 [2019-12-27 23:13:22,848 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 23:13:22,849 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:13:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 23:13:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 80. [2019-12-27 23:13:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 23:13:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 187 transitions. [2019-12-27 23:13:22,854 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 187 transitions. Word has length 15 [2019-12-27 23:13:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:22,855 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 187 transitions. [2019-12-27 23:13:22,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 187 transitions. [2019-12-27 23:13:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:22,855 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:22,856 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:23,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:23,060 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:23,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1722351587, now seen corresponding path program 21 times [2019-12-27 23:13:23,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:23,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881806469] [2019-12-27 23:13:23,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:23,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881806469] [2019-12-27 23:13:23,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895020275] [2019-12-27 23:13:23,125 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:23,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 23:13:23,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:23,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:23,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 23:13:23,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:23,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 12 [2019-12-27 23:13:23,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1081232087] [2019-12-27 23:13:23,202 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:23,203 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:23,204 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 35 transitions. [2019-12-27 23:13:23,204 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:23,205 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:23,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:23,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:23,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:23,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:13:23,206 INFO L87 Difference]: Start difference. First operand 80 states and 187 transitions. Second operand 10 states. [2019-12-27 23:13:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:23,373 INFO L93 Difference]: Finished difference Result 165 states and 357 transitions. [2019-12-27 23:13:23,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:13:23,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:23,375 INFO L225 Difference]: With dead ends: 165 [2019-12-27 23:13:23,375 INFO L226 Difference]: Without dead ends: 163 [2019-12-27 23:13:23,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:13:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-12-27 23:13:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 80. [2019-12-27 23:13:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 23:13:23,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 184 transitions. [2019-12-27 23:13:23,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 184 transitions. Word has length 15 [2019-12-27 23:13:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:23,380 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 184 transitions. [2019-12-27 23:13:23,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 184 transitions. [2019-12-27 23:13:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:23,381 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:23,381 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:23,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:23,584 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1171571248, now seen corresponding path program 22 times [2019-12-27 23:13:23,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:23,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526055609] [2019-12-27 23:13:23,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:23,665 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 23:13:23,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526055609] [2019-12-27 23:13:23,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180291910] [2019-12-27 23:13:23,666 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:23,722 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:23,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:23,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:23,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:13:23,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:23,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 23:13:23,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1235111232] [2019-12-27 23:13:23,752 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:23,753 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:23,754 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 25 transitions. [2019-12-27 23:13:23,754 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:23,754 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:23,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:23,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:23,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:23,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:23,755 INFO L87 Difference]: Start difference. First operand 80 states and 184 transitions. Second operand 10 states. [2019-12-27 23:13:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:23,951 INFO L93 Difference]: Finished difference Result 193 states and 415 transitions. [2019-12-27 23:13:23,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:13:23,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:23,953 INFO L225 Difference]: With dead ends: 193 [2019-12-27 23:13:23,953 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 23:13:23,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:13:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 23:13:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 79. [2019-12-27 23:13:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-12-27 23:13:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 180 transitions. [2019-12-27 23:13:23,957 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 180 transitions. Word has length 15 [2019-12-27 23:13:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:23,958 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 180 transitions. [2019-12-27 23:13:23,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 180 transitions. [2019-12-27 23:13:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:23,958 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:23,958 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:24,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:24,160 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2089910378, now seen corresponding path program 23 times [2019-12-27 23:13:24,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:24,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539304831] [2019-12-27 23:13:24,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:24,233 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 23:13:24,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539304831] [2019-12-27 23:13:24,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163457919] [2019-12-27 23:13:24,234 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 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 23:13:24,284 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:24,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:24,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:24,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:24,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:24,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 23:13:24,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1803196309] [2019-12-27 23:13:24,329 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:24,331 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:24,332 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 23:13:24,332 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:24,332 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:24,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:24,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:24,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:24,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:24,333 INFO L87 Difference]: Start difference. First operand 79 states and 180 transitions. Second operand 10 states. [2019-12-27 23:13:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:24,548 INFO L93 Difference]: Finished difference Result 195 states and 415 transitions. [2019-12-27 23:13:24,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:13:24,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:24,550 INFO L225 Difference]: With dead ends: 195 [2019-12-27 23:13:24,550 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 23:13:24,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:13:24,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 23:13:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 81. [2019-12-27 23:13:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-27 23:13:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 185 transitions. [2019-12-27 23:13:24,555 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 185 transitions. Word has length 15 [2019-12-27 23:13:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:24,556 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 185 transitions. [2019-12-27 23:13:24,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 185 transitions. [2019-12-27 23:13:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:24,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:24,557 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:24,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:24,760 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:24,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:24,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1425747830, now seen corresponding path program 24 times [2019-12-27 23:13:24,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:24,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645234168] [2019-12-27 23:13:24,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:24,820 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 23:13:24,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645234168] [2019-12-27 23:13:24,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752657653] [2019-12-27 23:13:24,820 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 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 23:13:24,902 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:13:24,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:24,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:24,905 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:24,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:24,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 23:13:24,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1038966503] [2019-12-27 23:13:24,953 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:24,954 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:24,955 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 35 transitions. [2019-12-27 23:13:24,955 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:25,028 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:13:25,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:13:25,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:13:25,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:13:25,030 INFO L87 Difference]: Start difference. First operand 81 states and 185 transitions. Second operand 14 states. [2019-12-27 23:13:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:25,457 INFO L93 Difference]: Finished difference Result 204 states and 442 transitions. [2019-12-27 23:13:25,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:13:25,457 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2019-12-27 23:13:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:25,459 INFO L225 Difference]: With dead ends: 204 [2019-12-27 23:13:25,459 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 23:13:25,460 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:13:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 23:13:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 83. [2019-12-27 23:13:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 23:13:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 192 transitions. [2019-12-27 23:13:25,464 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 192 transitions. Word has length 15 [2019-12-27 23:13:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:25,464 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 192 transitions. [2019-12-27 23:13:25,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:13:25,465 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 192 transitions. [2019-12-27 23:13:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:25,465 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:25,465 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:25,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:25,669 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash -734770781, now seen corresponding path program 25 times [2019-12-27 23:13:25,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:25,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383287536] [2019-12-27 23:13:25,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:25,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383287536] [2019-12-27 23:13:25,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285804936] [2019-12-27 23:13:25,728 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:25,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:13:25,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:25,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:25,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 23:13:25,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1646664829] [2019-12-27 23:13:25,850 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:25,852 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:25,854 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 35 transitions. [2019-12-27 23:13:25,854 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:25,888 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:13:25,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:25,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:25,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:13:25,890 INFO L87 Difference]: Start difference. First operand 83 states and 192 transitions. Second operand 12 states. [2019-12-27 23:13:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:26,096 INFO L93 Difference]: Finished difference Result 174 states and 383 transitions. [2019-12-27 23:13:26,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:13:26,096 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 23:13:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:26,097 INFO L225 Difference]: With dead ends: 174 [2019-12-27 23:13:26,098 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 23:13:26,098 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:13:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 23:13:26,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 85. [2019-12-27 23:13:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 23:13:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 198 transitions. [2019-12-27 23:13:26,103 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 198 transitions. Word has length 15 [2019-12-27 23:13:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:26,103 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 198 transitions. [2019-12-27 23:13:26,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 198 transitions. [2019-12-27 23:13:26,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:26,104 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:26,104 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:26,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:26,307 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:26,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:26,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1177170653, now seen corresponding path program 26 times [2019-12-27 23:13:26,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:26,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123483819] [2019-12-27 23:13:26,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:26,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123483819] [2019-12-27 23:13:26,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981653219] [2019-12-27 23:13:26,366 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:26,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:26,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:26,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:26,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:13:26,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:26,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 12 [2019-12-27 23:13:26,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2118157046] [2019-12-27 23:13:26,453 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:26,454 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:26,455 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 29 transitions. [2019-12-27 23:13:26,456 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:26,458 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:13:26,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:26,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:26,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:26,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:13:26,460 INFO L87 Difference]: Start difference. First operand 85 states and 198 transitions. Second operand 10 states. [2019-12-27 23:13:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:26,582 INFO L93 Difference]: Finished difference Result 175 states and 389 transitions. [2019-12-27 23:13:26,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:13:26,582 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:26,584 INFO L225 Difference]: With dead ends: 175 [2019-12-27 23:13:26,584 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 23:13:26,585 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:13:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 23:13:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2019-12-27 23:13:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 23:13:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 198 transitions. [2019-12-27 23:13:26,588 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 198 transitions. Word has length 15 [2019-12-27 23:13:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:26,589 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 198 transitions. [2019-12-27 23:13:26,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:26,589 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 198 transitions. [2019-12-27 23:13:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:26,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:26,590 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:26,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:26,793 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:26,794 INFO L82 PathProgramCache]: Analyzing trace with hash -258831523, now seen corresponding path program 27 times [2019-12-27 23:13:26,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:26,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861342982] [2019-12-27 23:13:26,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:26,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861342982] [2019-12-27 23:13:26,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613871062] [2019-12-27 23:13:26,854 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:26,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:13:26,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:26,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:13:26,956 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:27,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:27,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 23:13:27,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1807493534] [2019-12-27 23:13:27,026 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:27,027 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:27,029 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 29 transitions. [2019-12-27 23:13:27,029 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:27,031 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:13:27,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:27,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:27,032 INFO L87 Difference]: Start difference. First operand 85 states and 198 transitions. Second operand 10 states. [2019-12-27 23:13:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:27,187 INFO L93 Difference]: Finished difference Result 175 states and 392 transitions. [2019-12-27 23:13:27,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:13:27,187 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:27,188 INFO L225 Difference]: With dead ends: 175 [2019-12-27 23:13:27,188 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 23:13:27,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:13:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 23:13:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 83. [2019-12-27 23:13:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 23:13:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 191 transitions. [2019-12-27 23:13:27,192 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 191 transitions. Word has length 15 [2019-12-27 23:13:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:27,193 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 191 transitions. [2019-12-27 23:13:27,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 191 transitions. [2019-12-27 23:13:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:27,193 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:27,193 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:27,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:27,397 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1481233142, now seen corresponding path program 28 times [2019-12-27 23:13:27,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:27,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620170883] [2019-12-27 23:13:27,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:27,470 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 23:13:27,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620170883] [2019-12-27 23:13:27,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568596834] [2019-12-27 23:13:27,471 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:27,537 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:27,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:27,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:27,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:13:27,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:27,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 23:13:27,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1451548209] [2019-12-27 23:13:27,610 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:27,613 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:27,615 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 23:13:27,615 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:27,670 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:13:27,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:27,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:27,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:27,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:13:27,672 INFO L87 Difference]: Start difference. First operand 83 states and 191 transitions. Second operand 12 states. [2019-12-27 23:13:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:27,959 INFO L93 Difference]: Finished difference Result 206 states and 450 transitions. [2019-12-27 23:13:27,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:13:27,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 23:13:27,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:27,961 INFO L225 Difference]: With dead ends: 206 [2019-12-27 23:13:27,961 INFO L226 Difference]: Without dead ends: 204 [2019-12-27 23:13:27,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:13:27,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-27 23:13:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 86. [2019-12-27 23:13:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 23:13:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 202 transitions. [2019-12-27 23:13:27,967 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 202 transitions. Word has length 15 [2019-12-27 23:13:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:27,967 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 202 transitions. [2019-12-27 23:13:27,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 202 transitions. [2019-12-27 23:13:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:27,968 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:27,968 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:28,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:28,172 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:28,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1855089565, now seen corresponding path program 29 times [2019-12-27 23:13:28,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:28,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709666987] [2019-12-27 23:13:28,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:28,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709666987] [2019-12-27 23:13:28,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940756203] [2019-12-27 23:13:28,228 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:28,289 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:13:28,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:28,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:28,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:13:28,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:28,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 12 [2019-12-27 23:13:28,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [897655718] [2019-12-27 23:13:28,307 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:28,308 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:28,310 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 29 transitions. [2019-12-27 23:13:28,310 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:28,311 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:28,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:28,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:28,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:28,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:13:28,312 INFO L87 Difference]: Start difference. First operand 86 states and 202 transitions. Second operand 10 states. [2019-12-27 23:13:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:28,430 INFO L93 Difference]: Finished difference Result 185 states and 410 transitions. [2019-12-27 23:13:28,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:13:28,431 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:28,432 INFO L225 Difference]: With dead ends: 185 [2019-12-27 23:13:28,433 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 23:13:28,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:13:28,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 23:13:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 85. [2019-12-27 23:13:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 23:13:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 198 transitions. [2019-12-27 23:13:28,437 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 198 transitions. Word has length 15 [2019-12-27 23:13:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:28,437 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 198 transitions. [2019-12-27 23:13:28,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 198 transitions. [2019-12-27 23:13:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:28,438 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:28,438 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:28,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:28,641 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:28,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1038833270, now seen corresponding path program 30 times [2019-12-27 23:13:28,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:28,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570638458] [2019-12-27 23:13:28,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:28,716 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 23:13:28,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570638458] [2019-12-27 23:13:28,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470456789] [2019-12-27 23:13:28,717 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:28,795 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:13:28,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:28,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:28,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:13:28,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:28,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 23:13:28,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1501888555] [2019-12-27 23:13:28,855 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:28,856 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:28,857 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 25 transitions. [2019-12-27 23:13:28,857 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:28,857 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:28,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:28,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:28,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:28,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:28,858 INFO L87 Difference]: Start difference. First operand 85 states and 198 transitions. Second operand 10 states. [2019-12-27 23:13:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:29,029 INFO L93 Difference]: Finished difference Result 200 states and 439 transitions. [2019-12-27 23:13:29,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 23:13:29,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:29,032 INFO L225 Difference]: With dead ends: 200 [2019-12-27 23:13:29,032 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 23:13:29,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:13:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 23:13:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 83. [2019-12-27 23:13:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 23:13:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 191 transitions. [2019-12-27 23:13:29,037 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 191 transitions. Word has length 15 [2019-12-27 23:13:29,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:29,037 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 191 transitions. [2019-12-27 23:13:29,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 191 transitions. [2019-12-27 23:13:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:29,038 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:29,038 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:29,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:29,242 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:29,243 INFO L82 PathProgramCache]: Analyzing trace with hash -758125904, now seen corresponding path program 31 times [2019-12-27 23:13:29,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:29,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837364130] [2019-12-27 23:13:29,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:29,301 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 23:13:29,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837364130] [2019-12-27 23:13:29,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008157176] [2019-12-27 23:13:29,301 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:29,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:29,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:29,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:29,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2019-12-27 23:13:29,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1917444102] [2019-12-27 23:13:29,404 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:29,405 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:29,406 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 25 transitions. [2019-12-27 23:13:29,406 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:29,439 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:13:29,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:29,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:29,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:29,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:29,440 INFO L87 Difference]: Start difference. First operand 83 states and 191 transitions. Second operand 12 states. [2019-12-27 23:13:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:29,720 INFO L93 Difference]: Finished difference Result 210 states and 460 transitions. [2019-12-27 23:13:29,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 23:13:29,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-12-27 23:13:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:29,723 INFO L225 Difference]: With dead ends: 210 [2019-12-27 23:13:29,723 INFO L226 Difference]: Without dead ends: 208 [2019-12-27 23:13:29,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:13:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-27 23:13:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 87. [2019-12-27 23:13:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-27 23:13:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 206 transitions. [2019-12-27 23:13:29,728 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 206 transitions. Word has length 15 [2019-12-27 23:13:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:29,728 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 206 transitions. [2019-12-27 23:13:29,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 206 transitions. [2019-12-27 23:13:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:29,729 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:29,729 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:29,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:29,933 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 200518685, now seen corresponding path program 32 times [2019-12-27 23:13:29,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:29,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336836098] [2019-12-27 23:13:29,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:30,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336836098] [2019-12-27 23:13:30,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035542430] [2019-12-27 23:13:30,012 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:30,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:30,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:30,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:30,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:13:30,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:30,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 12 [2019-12-27 23:13:30,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [230675111] [2019-12-27 23:13:30,083 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:30,084 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:30,085 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 29 transitions. [2019-12-27 23:13:30,085 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:30,086 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:30,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:30,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:30,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:30,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 23:13:30,087 INFO L87 Difference]: Start difference. First operand 87 states and 206 transitions. Second operand 10 states. [2019-12-27 23:13:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:30,211 INFO L93 Difference]: Finished difference Result 185 states and 410 transitions. [2019-12-27 23:13:30,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 23:13:30,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:30,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:30,213 INFO L225 Difference]: With dead ends: 185 [2019-12-27 23:13:30,213 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 23:13:30,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:13:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 23:13:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 86. [2019-12-27 23:13:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 23:13:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 202 transitions. [2019-12-27 23:13:30,216 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 202 transitions. Word has length 15 [2019-12-27 23:13:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:30,217 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 202 transitions. [2019-12-27 23:13:30,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 202 transitions. [2019-12-27 23:13:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:30,217 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:30,217 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:30,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:30,418 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:30,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1200525776, now seen corresponding path program 33 times [2019-12-27 23:13:30,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:30,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669207659] [2019-12-27 23:13:30,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:30,516 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 23:13:30,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669207659] [2019-12-27 23:13:30,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173614309] [2019-12-27 23:13:30,517 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:30,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:13:30,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:30,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:30,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:30,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:30,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 23:13:30,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1458168910] [2019-12-27 23:13:30,662 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:30,663 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:30,665 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 23 transitions. [2019-12-27 23:13:30,665 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:30,666 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:30,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:30,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:30,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:30,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:30,668 INFO L87 Difference]: Start difference. First operand 86 states and 202 transitions. Second operand 10 states. [2019-12-27 23:13:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:30,906 INFO L93 Difference]: Finished difference Result 208 states and 459 transitions. [2019-12-27 23:13:30,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 23:13:30,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:30,908 INFO L225 Difference]: With dead ends: 208 [2019-12-27 23:13:30,908 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 23:13:30,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:13:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 23:13:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 85. [2019-12-27 23:13:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 23:13:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 198 transitions. [2019-12-27 23:13:30,913 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 198 transitions. Word has length 15 [2019-12-27 23:13:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:30,913 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 198 transitions. [2019-12-27 23:13:30,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 198 transitions. [2019-12-27 23:13:30,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 23:13:30,914 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:30,914 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:31,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:31,118 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:31,119 INFO L82 PathProgramCache]: Analyzing trace with hash -282186646, now seen corresponding path program 34 times [2019-12-27 23:13:31,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:31,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693673649] [2019-12-27 23:13:31,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:31,173 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 23:13:31,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693673649] [2019-12-27 23:13:31,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635418886] [2019-12-27 23:13:31,174 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:31,235 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:31,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:31,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:31,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:13:31,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:31,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2019-12-27 23:13:31,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1111324935] [2019-12-27 23:13:31,259 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:31,259 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:31,261 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 25 transitions. [2019-12-27 23:13:31,261 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:31,262 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:31,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 23:13:31,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:31,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 23:13:31,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:31,262 INFO L87 Difference]: Start difference. First operand 85 states and 198 transitions. Second operand 10 states. [2019-12-27 23:13:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:31,438 INFO L93 Difference]: Finished difference Result 210 states and 451 transitions. [2019-12-27 23:13:31,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 23:13:31,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-12-27 23:13:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:31,440 INFO L225 Difference]: With dead ends: 210 [2019-12-27 23:13:31,440 INFO L226 Difference]: Without dead ends: 208 [2019-12-27 23:13:31,441 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:13:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-27 23:13:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 81. [2019-12-27 23:13:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-12-27 23:13:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 186 transitions. [2019-12-27 23:13:31,445 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 186 transitions. Word has length 15 [2019-12-27 23:13:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:31,446 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 186 transitions. [2019-12-27 23:13:31,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 23:13:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 186 transitions. [2019-12-27 23:13:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:31,446 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:31,446 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:31,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:31,650 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:31,650 INFO L82 PathProgramCache]: Analyzing trace with hash -867499506, now seen corresponding path program 35 times [2019-12-27 23:13:31,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:31,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274203509] [2019-12-27 23:13:31,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:31,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274203509] [2019-12-27 23:13:31,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982433373] [2019-12-27 23:13:31,731 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:13:31,796 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:13:31,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:31,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:31,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:13:31,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:31,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:31,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [15092250] [2019-12-27 23:13:31,829 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:31,830 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:31,834 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 23:13:31,835 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:31,835 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:31,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:31,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:31,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:31,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:31,836 INFO L87 Difference]: Start difference. First operand 81 states and 186 transitions. Second operand 11 states. [2019-12-27 23:13:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:32,092 INFO L93 Difference]: Finished difference Result 271 states and 546 transitions. [2019-12-27 23:13:32,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:13:32,092 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:32,094 INFO L225 Difference]: With dead ends: 271 [2019-12-27 23:13:32,094 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 23:13:32,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:13:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 23:13:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 88. [2019-12-27 23:13:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 23:13:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2019-12-27 23:13:32,099 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 16 [2019-12-27 23:13:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:32,099 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2019-12-27 23:13:32,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:32,100 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2019-12-27 23:13:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:32,100 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:32,100 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:32,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:32,303 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:32,304 INFO L82 PathProgramCache]: Analyzing trace with hash 757879438, now seen corresponding path program 36 times [2019-12-27 23:13:32,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:32,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525879736] [2019-12-27 23:13:32,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:32,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525879736] [2019-12-27 23:13:32,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033131468] [2019-12-27 23:13:32,382 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:13:32,451 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:13:32,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:32,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:32,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:13:32,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:32,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:32,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1763665310] [2019-12-27 23:13:32,498 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:32,500 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:32,503 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 23:13:32,503 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:32,557 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:32,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:13:32,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:32,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:13:32,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:32,559 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand 13 states. [2019-12-27 23:13:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:32,945 INFO L93 Difference]: Finished difference Result 245 states and 519 transitions. [2019-12-27 23:13:32,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:13:32,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 23:13:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:32,947 INFO L225 Difference]: With dead ends: 245 [2019-12-27 23:13:32,947 INFO L226 Difference]: Without dead ends: 243 [2019-12-27 23:13:32,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=780, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:13:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-27 23:13:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 92. [2019-12-27 23:13:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-27 23:13:32,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 214 transitions. [2019-12-27 23:13:32,952 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 214 transitions. Word has length 16 [2019-12-27 23:13:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:32,952 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 214 transitions. [2019-12-27 23:13:32,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:13:32,953 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 214 transitions. [2019-12-27 23:13:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:32,953 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:32,953 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:33,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:33,157 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1716524027, now seen corresponding path program 37 times [2019-12-27 23:13:33,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:33,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074610779] [2019-12-27 23:13:33,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:33,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074610779] [2019-12-27 23:13:33,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953296467] [2019-12-27 23:13:33,226 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:33,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:33,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:13:33,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:33,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:33,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [755474678] [2019-12-27 23:13:33,306 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:33,307 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:33,309 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 23:13:33,309 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:33,309 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:33,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:33,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:33,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:33,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:33,309 INFO L87 Difference]: Start difference. First operand 92 states and 214 transitions. Second operand 11 states. [2019-12-27 23:13:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:33,549 INFO L93 Difference]: Finished difference Result 219 states and 471 transitions. [2019-12-27 23:13:33,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 23:13:33,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:33,551 INFO L225 Difference]: With dead ends: 219 [2019-12-27 23:13:33,551 INFO L226 Difference]: Without dead ends: 217 [2019-12-27 23:13:33,552 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:13:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-27 23:13:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 91. [2019-12-27 23:13:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-12-27 23:13:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 210 transitions. [2019-12-27 23:13:33,555 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 210 transitions. Word has length 16 [2019-12-27 23:13:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:33,555 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 210 transitions. [2019-12-27 23:13:33,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 210 transitions. [2019-12-27 23:13:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:33,556 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:33,556 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:33,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:33,759 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:33,760 INFO L82 PathProgramCache]: Analyzing trace with hash 315479566, now seen corresponding path program 38 times [2019-12-27 23:13:33,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:33,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000105709] [2019-12-27 23:13:33,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:33,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000105709] [2019-12-27 23:13:33,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047036526] [2019-12-27 23:13:33,825 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:33,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:33,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:33,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:33,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:33,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:33,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2019-12-27 23:13:33,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1736471164] [2019-12-27 23:13:33,941 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:33,942 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:33,943 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 30 transitions. [2019-12-27 23:13:33,943 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:33,944 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:33,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:33,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:33,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:33,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:13:33,944 INFO L87 Difference]: Start difference. First operand 91 states and 210 transitions. Second operand 11 states. [2019-12-27 23:13:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:34,241 INFO L93 Difference]: Finished difference Result 235 states and 504 transitions. [2019-12-27 23:13:34,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:13:34,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:34,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:34,243 INFO L225 Difference]: With dead ends: 235 [2019-12-27 23:13:34,243 INFO L226 Difference]: Without dead ends: 233 [2019-12-27 23:13:34,244 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:13:34,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-27 23:13:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 86. [2019-12-27 23:13:34,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 23:13:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 194 transitions. [2019-12-27 23:13:34,248 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 194 transitions. Word has length 16 [2019-12-27 23:13:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:34,248 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 194 transitions. [2019-12-27 23:13:34,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 194 transitions. [2019-12-27 23:13:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:34,249 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:34,249 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:34,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:34,453 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash -621051122, now seen corresponding path program 39 times [2019-12-27 23:13:34,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:34,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946959599] [2019-12-27 23:13:34,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:34,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946959599] [2019-12-27 23:13:34,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764241983] [2019-12-27 23:13:34,528 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:34,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:13:34,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:34,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:34,597 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:34,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:34,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:34,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1376043492] [2019-12-27 23:13:34,624 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:34,625 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:34,627 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 23:13:34,627 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:34,707 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:13:34,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:13:34,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:34,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:13:34,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:13:34,708 INFO L87 Difference]: Start difference. First operand 86 states and 194 transitions. Second operand 15 states. [2019-12-27 23:13:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:35,151 INFO L93 Difference]: Finished difference Result 248 states and 532 transitions. [2019-12-27 23:13:35,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:13:35,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2019-12-27 23:13:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:35,153 INFO L225 Difference]: With dead ends: 248 [2019-12-27 23:13:35,153 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 23:13:35,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=456, Invalid=1026, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:13:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 23:13:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 94. [2019-12-27 23:13:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-27 23:13:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 219 transitions. [2019-12-27 23:13:35,159 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 219 transitions. Word has length 16 [2019-12-27 23:13:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:35,159 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 219 transitions. [2019-12-27 23:13:35,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:13:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 219 transitions. [2019-12-27 23:13:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:35,160 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:35,160 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:35,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:35,362 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:35,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1513397563, now seen corresponding path program 40 times [2019-12-27 23:13:35,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:35,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280579966] [2019-12-27 23:13:35,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:35,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280579966] [2019-12-27 23:13:35,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904435429] [2019-12-27 23:13:35,423 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:35,516 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:35,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:35,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:35,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:13:35,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:35,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:35,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1214442566] [2019-12-27 23:13:35,562 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:35,564 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:35,566 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 23:13:35,566 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:35,608 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:35,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:13:35,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:35,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:13:35,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:35,609 INFO L87 Difference]: Start difference. First operand 94 states and 219 transitions. Second operand 13 states. [2019-12-27 23:13:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:35,940 INFO L93 Difference]: Finished difference Result 220 states and 478 transitions. [2019-12-27 23:13:35,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:13:35,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 23:13:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:35,942 INFO L225 Difference]: With dead ends: 220 [2019-12-27 23:13:35,942 INFO L226 Difference]: Without dead ends: 218 [2019-12-27 23:13:35,942 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:13:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-27 23:13:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 95. [2019-12-27 23:13:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 23:13:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 223 transitions. [2019-12-27 23:13:35,945 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 223 transitions. Word has length 16 [2019-12-27 23:13:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:35,946 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 223 transitions. [2019-12-27 23:13:35,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:13:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 223 transitions. [2019-12-27 23:13:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:35,947 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:35,947 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:36,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:36,151 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:36,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1822925144, now seen corresponding path program 41 times [2019-12-27 23:13:36,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:36,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731221771] [2019-12-27 23:13:36,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:36,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731221771] [2019-12-27 23:13:36,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746067539] [2019-12-27 23:13:36,215 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:36,271 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:13:36,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:36,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 23:13:36,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:36,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:36,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 23:13:36,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1298504883] [2019-12-27 23:13:36,342 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:36,343 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:36,345 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 23:13:36,345 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:36,345 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:36,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:36,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:36,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:36,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:13:36,346 INFO L87 Difference]: Start difference. First operand 95 states and 223 transitions. Second operand 11 states. [2019-12-27 23:13:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:36,518 INFO L93 Difference]: Finished difference Result 192 states and 423 transitions. [2019-12-27 23:13:36,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 23:13:36,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:36,520 INFO L225 Difference]: With dead ends: 192 [2019-12-27 23:13:36,520 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 23:13:36,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:13:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 23:13:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 96. [2019-12-27 23:13:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 23:13:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 224 transitions. [2019-12-27 23:13:36,523 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 224 transitions. Word has length 16 [2019-12-27 23:13:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:36,523 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 224 transitions. [2019-12-27 23:13:36,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 224 transitions. [2019-12-27 23:13:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:36,524 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:36,524 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:36,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:36,725 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:36,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997691, now seen corresponding path program 42 times [2019-12-27 23:13:36,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:36,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072947678] [2019-12-27 23:13:36,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:36,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072947678] [2019-12-27 23:13:36,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53436126] [2019-12-27 23:13:36,792 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 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 23:13:36,862 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:13:36,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:36,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:36,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:36,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:36,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:36,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [945976798] [2019-12-27 23:13:36,894 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:36,895 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:36,897 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 23:13:36,897 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:36,897 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:36,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:36,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:36,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:36,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:36,898 INFO L87 Difference]: Start difference. First operand 96 states and 224 transitions. Second operand 11 states. [2019-12-27 23:13:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:37,130 INFO L93 Difference]: Finished difference Result 223 states and 487 transitions. [2019-12-27 23:13:37,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 23:13:37,131 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:37,132 INFO L225 Difference]: With dead ends: 223 [2019-12-27 23:13:37,132 INFO L226 Difference]: Without dead ends: 221 [2019-12-27 23:13:37,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:13:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-27 23:13:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 95. [2019-12-27 23:13:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 23:13:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 220 transitions. [2019-12-27 23:13:37,137 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 220 transitions. Word has length 16 [2019-12-27 23:13:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:37,137 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 220 transitions. [2019-12-27 23:13:37,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 220 transitions. [2019-12-27 23:13:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:37,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:37,138 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:37,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:37,341 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1989336821, now seen corresponding path program 43 times [2019-12-27 23:13:37,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:37,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932455227] [2019-12-27 23:13:37,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:37,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932455227] [2019-12-27 23:13:37,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204439340] [2019-12-27 23:13:37,404 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 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 23:13:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:37,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:37,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:37,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:37,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:37,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1506177789] [2019-12-27 23:13:37,485 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:37,486 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:37,491 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 23:13:37,491 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:37,491 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:37,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:37,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:37,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:37,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:37,492 INFO L87 Difference]: Start difference. First operand 95 states and 220 transitions. Second operand 11 states. [2019-12-27 23:13:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:37,729 INFO L93 Difference]: Finished difference Result 216 states and 470 transitions. [2019-12-27 23:13:37,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 23:13:37,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:37,731 INFO L225 Difference]: With dead ends: 216 [2019-12-27 23:13:37,731 INFO L226 Difference]: Without dead ends: 214 [2019-12-27 23:13:37,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:13:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-27 23:13:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 93. [2019-12-27 23:13:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 23:13:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 213 transitions. [2019-12-27 23:13:37,735 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 213 transitions. Word has length 16 [2019-12-27 23:13:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:37,735 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 213 transitions. [2019-12-27 23:13:37,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 213 transitions. [2019-12-27 23:13:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:37,736 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:37,736 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:37,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:37,939 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:37,940 INFO L82 PathProgramCache]: Analyzing trace with hash -565565810, now seen corresponding path program 44 times [2019-12-27 23:13:37,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:37,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370709189] [2019-12-27 23:13:37,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:38,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370709189] [2019-12-27 23:13:38,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384179978] [2019-12-27 23:13:38,004 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 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 23:13:38,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:38,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:38,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:38,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:38,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:38,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:38,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [831976256] [2019-12-27 23:13:38,096 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:38,098 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:38,099 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 23:13:38,099 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:38,148 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:38,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:13:38,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:38,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:13:38,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:38,149 INFO L87 Difference]: Start difference. First operand 93 states and 213 transitions. Second operand 13 states. [2019-12-27 23:13:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:38,508 INFO L93 Difference]: Finished difference Result 240 states and 511 transitions. [2019-12-27 23:13:38,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:13:38,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 23:13:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:38,510 INFO L225 Difference]: With dead ends: 240 [2019-12-27 23:13:38,510 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 23:13:38,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=733, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:13:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 23:13:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 96. [2019-12-27 23:13:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 23:13:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 224 transitions. [2019-12-27 23:13:38,516 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 224 transitions. Word has length 16 [2019-12-27 23:13:38,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:38,516 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 224 transitions. [2019-12-27 23:13:38,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:13:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 224 transitions. [2019-12-27 23:13:38,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:38,517 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:38,517 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:38,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:38,718 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:38,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:38,719 INFO L82 PathProgramCache]: Analyzing trace with hash 393078779, now seen corresponding path program 45 times [2019-12-27 23:13:38,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:38,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511837732] [2019-12-27 23:13:38,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:38,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511837732] [2019-12-27 23:13:38,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382116143] [2019-12-27 23:13:38,790 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 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 23:13:38,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:13:38,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:38,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:38,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:13:38,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:38,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:38,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1970600219] [2019-12-27 23:13:38,896 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:38,897 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:38,899 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 30 transitions. [2019-12-27 23:13:38,899 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:38,899 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:38,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:38,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:38,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:38,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:38,900 INFO L87 Difference]: Start difference. First operand 96 states and 224 transitions. Second operand 11 states. [2019-12-27 23:13:39,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:39,135 INFO L93 Difference]: Finished difference Result 225 states and 485 transitions. [2019-12-27 23:13:39,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 23:13:39,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:39,138 INFO L225 Difference]: With dead ends: 225 [2019-12-27 23:13:39,138 INFO L226 Difference]: Without dead ends: 223 [2019-12-27 23:13:39,138 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:13:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-27 23:13:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 95. [2019-12-27 23:13:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-12-27 23:13:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 220 transitions. [2019-12-27 23:13:39,142 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 220 transitions. Word has length 16 [2019-12-27 23:13:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:39,142 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 220 transitions. [2019-12-27 23:13:39,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 220 transitions. [2019-12-27 23:13:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:39,143 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:39,143 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:39,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:39,345 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:39,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:39,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1007965682, now seen corresponding path program 46 times [2019-12-27 23:13:39,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:39,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439599155] [2019-12-27 23:13:39,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:39,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439599155] [2019-12-27 23:13:39,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812963991] [2019-12-27 23:13:39,432 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 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 23:13:39,507 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:39,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:39,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:39,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:39,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:39,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2019-12-27 23:13:39,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1011632193] [2019-12-27 23:13:39,558 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:39,559 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:39,561 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 23:13:39,561 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:39,562 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:39,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:39,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:39,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:13:39,562 INFO L87 Difference]: Start difference. First operand 95 states and 220 transitions. Second operand 11 states. [2019-12-27 23:13:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:39,818 INFO L93 Difference]: Finished difference Result 234 states and 504 transitions. [2019-12-27 23:13:39,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:13:39,819 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:39,820 INFO L225 Difference]: With dead ends: 234 [2019-12-27 23:13:39,820 INFO L226 Difference]: Without dead ends: 232 [2019-12-27 23:13:39,821 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:13:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-27 23:13:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 91. [2019-12-27 23:13:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-12-27 23:13:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 208 transitions. [2019-12-27 23:13:39,824 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 208 transitions. Word has length 16 [2019-12-27 23:13:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:39,824 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 208 transitions. [2019-12-27 23:13:39,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 208 transitions. [2019-12-27 23:13:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:39,825 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:39,825 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:40,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:40,025 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:40,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1371575182, now seen corresponding path program 47 times [2019-12-27 23:13:40,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:40,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980715949] [2019-12-27 23:13:40,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:40,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980715949] [2019-12-27 23:13:40,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67819046] [2019-12-27 23:13:40,102 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 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 23:13:40,163 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:13:40,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:40,164 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:40,165 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:13:40,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:40,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:40,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [310160478] [2019-12-27 23:13:40,192 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:40,193 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:40,194 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 23:13:40,194 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:40,279 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:13:40,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:13:40,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:13:40,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:13:40,280 INFO L87 Difference]: Start difference. First operand 91 states and 208 transitions. Second operand 17 states. [2019-12-27 23:13:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:40,937 INFO L93 Difference]: Finished difference Result 298 states and 636 transitions. [2019-12-27 23:13:40,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:13:40,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-12-27 23:13:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:40,940 INFO L225 Difference]: With dead ends: 298 [2019-12-27 23:13:40,940 INFO L226 Difference]: Without dead ends: 296 [2019-12-27 23:13:40,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=611, Invalid=1459, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:13:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-12-27 23:13:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 103. [2019-12-27 23:13:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 23:13:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 239 transitions. [2019-12-27 23:13:40,944 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 239 transitions. Word has length 16 [2019-12-27 23:13:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:40,944 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 239 transitions. [2019-12-27 23:13:40,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:13:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 239 transitions. [2019-12-27 23:13:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:40,945 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:40,945 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:41,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:41,146 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash -417606021, now seen corresponding path program 48 times [2019-12-27 23:13:41,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:41,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859516325] [2019-12-27 23:13:41,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:41,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859516325] [2019-12-27 23:13:41,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072272668] [2019-12-27 23:13:41,216 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 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 23:13:41,276 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:13:41,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:41,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:13:41,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:41,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:41,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2019-12-27 23:13:41,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2030449378] [2019-12-27 23:13:41,321 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:41,322 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:41,324 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 23:13:41,324 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:41,389 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:13:41,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:13:41,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:41,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:13:41,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:13:41,389 INFO L87 Difference]: Start difference. First operand 103 states and 239 transitions. Second operand 15 states. [2019-12-27 23:13:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:41,768 INFO L93 Difference]: Finished difference Result 265 states and 573 transitions. [2019-12-27 23:13:41,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:13:41,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2019-12-27 23:13:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:41,771 INFO L225 Difference]: With dead ends: 265 [2019-12-27 23:13:41,771 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 23:13:41,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=388, Invalid=944, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:13:41,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 23:13:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 103. [2019-12-27 23:13:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 23:13:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 239 transitions. [2019-12-27 23:13:41,775 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 239 transitions. Word has length 16 [2019-12-27 23:13:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:41,775 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 239 transitions. [2019-12-27 23:13:41,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:13:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 239 transitions. [2019-12-27 23:13:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:41,776 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:41,776 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:41,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:41,977 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1716842664, now seen corresponding path program 49 times [2019-12-27 23:13:41,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:41,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795744124] [2019-12-27 23:13:41,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:42,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795744124] [2019-12-27 23:13:42,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414575897] [2019-12-27 23:13:42,037 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 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 23:13:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:42,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 23:13:42,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:42,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:42,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 23:13:42,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1733153361] [2019-12-27 23:13:42,152 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:42,154 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:42,155 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 38 transitions. [2019-12-27 23:13:42,155 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:42,197 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:13:42,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:13:42,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:13:42,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:13:42,199 INFO L87 Difference]: Start difference. First operand 103 states and 239 transitions. Second operand 13 states. [2019-12-27 23:13:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:42,472 INFO L93 Difference]: Finished difference Result 225 states and 496 transitions. [2019-12-27 23:13:42,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:13:42,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 23:13:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:42,473 INFO L225 Difference]: With dead ends: 225 [2019-12-27 23:13:42,474 INFO L226 Difference]: Without dead ends: 223 [2019-12-27 23:13:42,474 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:13:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-27 23:13:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2019-12-27 23:13:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 23:13:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 23:13:42,478 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 23:13:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:42,479 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 23:13:42,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:13:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 23:13:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:42,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:42,480 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:42,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:42,683 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1274442792, now seen corresponding path program 50 times [2019-12-27 23:13:42,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:42,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165696895] [2019-12-27 23:13:42,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:42,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165696895] [2019-12-27 23:13:42,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117383063] [2019-12-27 23:13:42,748 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 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 23:13:42,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:42,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:42,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:42,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:13:42,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:42,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 13 [2019-12-27 23:13:42,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1689747028] [2019-12-27 23:13:42,828 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:42,829 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:42,830 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 23:13:42,830 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:42,832 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:13:42,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:42,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:42,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:42,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:42,832 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 11 states. [2019-12-27 23:13:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:42,981 INFO L93 Difference]: Finished difference Result 228 states and 507 transitions. [2019-12-27 23:13:42,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 23:13:42,981 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:42,982 INFO L225 Difference]: With dead ends: 228 [2019-12-27 23:13:42,982 INFO L226 Difference]: Without dead ends: 226 [2019-12-27 23:13:42,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:13:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-27 23:13:42,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 105. [2019-12-27 23:13:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 23:13:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 23:13:42,986 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 23:13:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:42,986 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 23:13:42,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 23:13:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:42,987 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:42,987 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:43,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:43,189 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:43,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2102185374, now seen corresponding path program 51 times [2019-12-27 23:13:43,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:43,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089545579] [2019-12-27 23:13:43,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:43,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089545579] [2019-12-27 23:13:43,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790632602] [2019-12-27 23:13:43,246 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 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 23:13:43,314 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:13:43,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:43,315 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 23:13:43,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:43,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:43,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 23:13:43,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1773287525] [2019-12-27 23:13:43,396 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:43,398 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:43,400 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 23:13:43,400 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:43,401 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:13:43,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:43,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:43,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:43,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:13:43,402 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 11 states. [2019-12-27 23:13:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:43,566 INFO L93 Difference]: Finished difference Result 234 states and 525 transitions. [2019-12-27 23:13:43,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 23:13:43,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:43,567 INFO L225 Difference]: With dead ends: 234 [2019-12-27 23:13:43,568 INFO L226 Difference]: Without dead ends: 232 [2019-12-27 23:13:43,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:13:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-12-27 23:13:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 105. [2019-12-27 23:13:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 23:13:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 23:13:43,571 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 23:13:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:43,572 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 23:13:43,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 23:13:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:43,572 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:43,573 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:43,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:43,773 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash -362120709, now seen corresponding path program 52 times [2019-12-27 23:13:43,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:43,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674008884] [2019-12-27 23:13:43,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:43,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674008884] [2019-12-27 23:13:43,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767436188] [2019-12-27 23:13:43,828 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 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 23:13:43,886 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:43,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:43,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:43,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:43,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:43,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:43,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [145686237] [2019-12-27 23:13:43,931 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:43,932 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:43,933 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 30 transitions. [2019-12-27 23:13:43,934 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:43,960 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:13:43,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:13:43,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:43,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:13:43,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:43,961 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 13 states. [2019-12-27 23:13:44,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:44,210 INFO L93 Difference]: Finished difference Result 264 states and 580 transitions. [2019-12-27 23:13:44,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:13:44,211 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 23:13:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:44,212 INFO L225 Difference]: With dead ends: 264 [2019-12-27 23:13:44,212 INFO L226 Difference]: Without dead ends: 262 [2019-12-27 23:13:44,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:13:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-12-27 23:13:44,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 107. [2019-12-27 23:13:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 23:13:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 252 transitions. [2019-12-27 23:13:44,216 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 252 transitions. Word has length 16 [2019-12-27 23:13:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:44,216 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 252 transitions. [2019-12-27 23:13:44,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:13:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 252 transitions. [2019-12-27 23:13:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:44,217 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:44,217 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:44,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:44,420 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash 596523880, now seen corresponding path program 53 times [2019-12-27 23:13:44,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:44,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213067467] [2019-12-27 23:13:44,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:44,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213067467] [2019-12-27 23:13:44,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195574401] [2019-12-27 23:13:44,514 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 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 23:13:44,586 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:13:44,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:44,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:44,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:13:44,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:44,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 13 [2019-12-27 23:13:44,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1928779106] [2019-12-27 23:13:44,608 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:44,609 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:44,611 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 23:13:44,611 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:44,613 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:13:44,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:44,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:44,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:44,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:44,613 INFO L87 Difference]: Start difference. First operand 107 states and 252 transitions. Second operand 11 states. [2019-12-27 23:13:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:44,770 INFO L93 Difference]: Finished difference Result 237 states and 528 transitions. [2019-12-27 23:13:44,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 23:13:44,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:44,772 INFO L225 Difference]: With dead ends: 237 [2019-12-27 23:13:44,772 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 23:13:44,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:13:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 23:13:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 107. [2019-12-27 23:13:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 23:13:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 252 transitions. [2019-12-27 23:13:44,776 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 252 transitions. Word has length 16 [2019-12-27 23:13:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:44,776 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 252 transitions. [2019-12-27 23:13:44,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 252 transitions. [2019-12-27 23:13:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:44,777 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:44,777 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:44,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:44,980 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:44,981 INFO L82 PathProgramCache]: Analyzing trace with hash -804520581, now seen corresponding path program 54 times [2019-12-27 23:13:44,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:44,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817522284] [2019-12-27 23:13:44,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:45,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817522284] [2019-12-27 23:13:45,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380940686] [2019-12-27 23:13:45,043 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 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 23:13:45,112 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:13:45,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:45,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:13:45,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:13:45,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:45,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2019-12-27 23:13:45,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [17854600] [2019-12-27 23:13:45,163 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:45,164 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:45,166 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 23:13:45,166 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:45,167 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:13:45,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:45,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:45,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:45,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:45,168 INFO L87 Difference]: Start difference. First operand 107 states and 252 transitions. Second operand 11 states. [2019-12-27 23:13:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:45,345 INFO L93 Difference]: Finished difference Result 253 states and 554 transitions. [2019-12-27 23:13:45,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:13:45,345 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:45,346 INFO L225 Difference]: With dead ends: 253 [2019-12-27 23:13:45,346 INFO L226 Difference]: Without dead ends: 251 [2019-12-27 23:13:45,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:13:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-12-27 23:13:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 105. [2019-12-27 23:13:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 23:13:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 23:13:45,349 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 23:13:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:45,350 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 23:13:45,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 23:13:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:45,350 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:45,351 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:45,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:45,551 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:45,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1693487541, now seen corresponding path program 55 times [2019-12-27 23:13:45,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:45,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980720239] [2019-12-27 23:13:45,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:45,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980720239] [2019-12-27 23:13:45,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363219234] [2019-12-27 23:13:45,609 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 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 23:13:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:45,669 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:13:45,670 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:45,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:45,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2019-12-27 23:13:45,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1536746186] [2019-12-27 23:13:45,721 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:45,722 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:45,723 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 23:13:45,724 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:45,750 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:13:45,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:13:45,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:13:45,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:13:45,751 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 13 states. [2019-12-27 23:13:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:46,016 INFO L93 Difference]: Finished difference Result 253 states and 561 transitions. [2019-12-27 23:13:46,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:13:46,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 23:13:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:46,018 INFO L225 Difference]: With dead ends: 253 [2019-12-27 23:13:46,018 INFO L226 Difference]: Without dead ends: 251 [2019-12-27 23:13:46,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:13:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-12-27 23:13:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 106. [2019-12-27 23:13:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 23:13:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 23:13:46,023 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 23:13:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:46,023 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 23:13:46,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:13:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 23:13:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:46,024 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:46,024 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:46,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:46,227 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1642835166, now seen corresponding path program 56 times [2019-12-27 23:13:46,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:46,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360977112] [2019-12-27 23:13:46,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:46,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360977112] [2019-12-27 23:13:46,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578879507] [2019-12-27 23:13:46,305 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 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 23:13:46,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:46,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:46,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:46,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:13:46,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:46,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 13 [2019-12-27 23:13:46,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [159076095] [2019-12-27 23:13:46,380 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:46,381 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:46,383 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 23:13:46,383 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:46,383 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:46,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:46,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:46,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:46,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:46,388 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 11 states. [2019-12-27 23:13:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:46,528 INFO L93 Difference]: Finished difference Result 227 states and 512 transitions. [2019-12-27 23:13:46,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 23:13:46,529 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:46,530 INFO L225 Difference]: With dead ends: 227 [2019-12-27 23:13:46,531 INFO L226 Difference]: Without dead ends: 225 [2019-12-27 23:13:46,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:13:46,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-27 23:13:46,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 106. [2019-12-27 23:13:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 23:13:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 23:13:46,537 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 23:13:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:46,537 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 23:13:46,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 23:13:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:46,538 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:46,538 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:46,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:46,742 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:46,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:46,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1251087669, now seen corresponding path program 57 times [2019-12-27 23:13:46,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:46,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608701303] [2019-12-27 23:13:46,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:46,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608701303] [2019-12-27 23:13:46,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41560505] [2019-12-27 23:13:46,806 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 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 23:13:46,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:13:46,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:46,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:46,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:13:46,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:46,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:46,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [133788090] [2019-12-27 23:13:46,897 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:46,898 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:46,899 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 23:13:46,899 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:46,900 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:46,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:46,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:46,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:46,901 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 11 states. [2019-12-27 23:13:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:47,094 INFO L93 Difference]: Finished difference Result 254 states and 568 transitions. [2019-12-27 23:13:47,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 23:13:47,095 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:47,097 INFO L225 Difference]: With dead ends: 254 [2019-12-27 23:13:47,097 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 23:13:47,097 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:13:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 23:13:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 105. [2019-12-27 23:13:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 23:13:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 23:13:47,099 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 23:13:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:47,100 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 23:13:47,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 23:13:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:47,100 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:47,100 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:47,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:47,301 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:47,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2125540497, now seen corresponding path program 58 times [2019-12-27 23:13:47,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:47,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847126601] [2019-12-27 23:13:47,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:47,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847126601] [2019-12-27 23:13:47,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555812189] [2019-12-27 23:13:47,357 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 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 23:13:47,414 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:47,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:47,415 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:47,416 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:47,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:47,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:47,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1776745424] [2019-12-27 23:13:47,453 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:47,454 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:47,456 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 23:13:47,456 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:47,456 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:47,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:47,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:47,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:47,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:47,457 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 11 states. [2019-12-27 23:13:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:47,646 INFO L93 Difference]: Finished difference Result 254 states and 568 transitions. [2019-12-27 23:13:47,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 23:13:47,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:47,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:47,649 INFO L225 Difference]: With dead ends: 254 [2019-12-27 23:13:47,649 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 23:13:47,649 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:13:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 23:13:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 101. [2019-12-27 23:13:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 23:13:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 231 transitions. [2019-12-27 23:13:47,653 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 231 transitions. Word has length 16 [2019-12-27 23:13:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:47,653 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 231 transitions. [2019-12-27 23:13:47,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 231 transitions. [2019-12-27 23:13:47,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:47,654 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:47,654 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:47,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:47,857 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1141614834, now seen corresponding path program 59 times [2019-12-27 23:13:47,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:47,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401948671] [2019-12-27 23:13:47,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:47,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401948671] [2019-12-27 23:13:47,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946578413] [2019-12-27 23:13:47,919 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 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 23:13:47,977 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:13:47,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:47,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:47,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:48,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:48,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:48,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1788749053] [2019-12-27 23:13:48,001 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:48,002 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:48,003 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 30 transitions. [2019-12-27 23:13:48,003 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:48,087 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:13:48,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:13:48,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:13:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:13:48,088 INFO L87 Difference]: Start difference. First operand 101 states and 231 transitions. Second operand 15 states. [2019-12-27 23:13:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:48,533 INFO L93 Difference]: Finished difference Result 287 states and 616 transitions. [2019-12-27 23:13:48,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:13:48,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2019-12-27 23:13:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:48,535 INFO L225 Difference]: With dead ends: 287 [2019-12-27 23:13:48,536 INFO L226 Difference]: Without dead ends: 285 [2019-12-27 23:13:48,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:13:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-12-27 23:13:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 106. [2019-12-27 23:13:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 23:13:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 23:13:48,540 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 23:13:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:48,540 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 23:13:48,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:13:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 23:13:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:48,540 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:48,540 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:48,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:48,741 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash 992833851, now seen corresponding path program 60 times [2019-12-27 23:13:48,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:48,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487635945] [2019-12-27 23:13:48,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:48,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487635945] [2019-12-27 23:13:48,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608714549] [2019-12-27 23:13:48,796 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 23:13:48,870 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:13:48,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:48,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:13:48,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:48,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:48,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2019-12-27 23:13:48,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1409235579] [2019-12-27 23:13:48,915 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:48,916 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:48,917 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 23:13:48,917 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:48,946 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:13:48,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:13:48,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:48,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:13:48,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:13:48,948 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 13 states. [2019-12-27 23:13:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:49,240 INFO L93 Difference]: Finished difference Result 262 states and 573 transitions. [2019-12-27 23:13:49,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:13:49,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 23:13:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:49,242 INFO L225 Difference]: With dead ends: 262 [2019-12-27 23:13:49,242 INFO L226 Difference]: Without dead ends: 260 [2019-12-27 23:13:49,243 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:13:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-27 23:13:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 107. [2019-12-27 23:13:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 23:13:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 253 transitions. [2019-12-27 23:13:49,246 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 253 transitions. Word has length 16 [2019-12-27 23:13:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:49,246 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 253 transitions. [2019-12-27 23:13:49,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:13:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 253 transitions. [2019-12-27 23:13:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:49,247 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:49,247 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:49,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:49,450 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1951478440, now seen corresponding path program 61 times [2019-12-27 23:13:49,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:49,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914687813] [2019-12-27 23:13:49,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:49,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914687813] [2019-12-27 23:13:49,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775652249] [2019-12-27 23:13:49,525 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 23:13:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:49,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:49,582 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 23:13:49,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:49,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 13 [2019-12-27 23:13:49,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1033848018] [2019-12-27 23:13:49,595 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:49,596 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:49,597 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 32 transitions. [2019-12-27 23:13:49,597 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:49,598 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:49,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:49,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:49,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:49,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 23:13:49,599 INFO L87 Difference]: Start difference. First operand 107 states and 253 transitions. Second operand 11 states. [2019-12-27 23:13:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:49,760 INFO L93 Difference]: Finished difference Result 229 states and 507 transitions. [2019-12-27 23:13:49,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 23:13:49,760 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:49,762 INFO L225 Difference]: With dead ends: 229 [2019-12-27 23:13:49,762 INFO L226 Difference]: Without dead ends: 227 [2019-12-27 23:13:49,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:13:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-27 23:13:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 107. [2019-12-27 23:13:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 23:13:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 253 transitions. [2019-12-27 23:13:49,766 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 253 transitions. Word has length 16 [2019-12-27 23:13:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:49,766 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 253 transitions. [2019-12-27 23:13:49,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 253 transitions. [2019-12-27 23:13:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:49,767 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:49,767 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:49,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:49,970 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:49,971 INFO L82 PathProgramCache]: Analyzing trace with hash 550433979, now seen corresponding path program 62 times [2019-12-27 23:13:49,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:49,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324557626] [2019-12-27 23:13:49,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:50,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324557626] [2019-12-27 23:13:50,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032416483] [2019-12-27 23:13:50,027 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 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 23:13:50,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:50,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:50,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:50,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:13:50,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:50,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:50,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [176963776] [2019-12-27 23:13:50,110 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:50,111 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:50,112 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 24 transitions. [2019-12-27 23:13:50,112 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:50,113 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:50,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:50,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:50,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:50,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:50,114 INFO L87 Difference]: Start difference. First operand 107 states and 253 transitions. Second operand 11 states. [2019-12-27 23:13:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:50,313 INFO L93 Difference]: Finished difference Result 259 states and 566 transitions. [2019-12-27 23:13:50,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:13:50,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:50,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:50,315 INFO L225 Difference]: With dead ends: 259 [2019-12-27 23:13:50,315 INFO L226 Difference]: Without dead ends: 257 [2019-12-27 23:13:50,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:13:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-27 23:13:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 106. [2019-12-27 23:13:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 23:13:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 23:13:50,319 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 23:13:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:50,319 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 23:13:50,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 23:13:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:50,320 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:50,320 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:50,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:50,523 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:50,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:50,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1468773109, now seen corresponding path program 63 times [2019-12-27 23:13:50,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:50,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127493910] [2019-12-27 23:13:50,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:50,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127493910] [2019-12-27 23:13:50,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167859543] [2019-12-27 23:13:50,602 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 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 23:13:50,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:13:50,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:50,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:50,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:13:50,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:50,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:50,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [791869501] [2019-12-27 23:13:50,698 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:50,699 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:50,700 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 23:13:50,700 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:50,701 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:50,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:50,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:50,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:50,702 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 11 states. [2019-12-27 23:13:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:50,913 INFO L93 Difference]: Finished difference Result 259 states and 569 transitions. [2019-12-27 23:13:50,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:13:50,913 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:50,915 INFO L225 Difference]: With dead ends: 259 [2019-12-27 23:13:50,916 INFO L226 Difference]: Without dead ends: 257 [2019-12-27 23:13:50,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:13:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-12-27 23:13:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 103. [2019-12-27 23:13:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 23:13:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 238 transitions. [2019-12-27 23:13:50,919 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 238 transitions. Word has length 16 [2019-12-27 23:13:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:50,919 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 238 transitions. [2019-12-27 23:13:50,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 238 transitions. [2019-12-27 23:13:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:50,920 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:50,920 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:51,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:51,121 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:51,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1086129522, now seen corresponding path program 64 times [2019-12-27 23:13:51,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:51,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508139312] [2019-12-27 23:13:51,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:51,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508139312] [2019-12-27 23:13:51,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882571631] [2019-12-27 23:13:51,173 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 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 23:13:51,232 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:51,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:51,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:51,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:51,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:51,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2019-12-27 23:13:51,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [301193852] [2019-12-27 23:13:51,263 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:51,264 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:51,266 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 26 transitions. [2019-12-27 23:13:51,266 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:51,293 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:13:51,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:13:51,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:51,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:13:51,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:13:51,294 INFO L87 Difference]: Start difference. First operand 103 states and 238 transitions. Second operand 13 states. [2019-12-27 23:13:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:51,594 INFO L93 Difference]: Finished difference Result 274 states and 591 transitions. [2019-12-27 23:13:51,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:13:51,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-12-27 23:13:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:51,596 INFO L225 Difference]: With dead ends: 274 [2019-12-27 23:13:51,597 INFO L226 Difference]: Without dead ends: 272 [2019-12-27 23:13:51,597 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=759, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:13:51,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-12-27 23:13:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 106. [2019-12-27 23:13:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 23:13:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2019-12-27 23:13:51,600 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 16 [2019-12-27 23:13:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:51,601 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2019-12-27 23:13:51,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:13:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2019-12-27 23:13:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:51,601 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:51,601 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:51,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:51,805 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:51,805 INFO L82 PathProgramCache]: Analyzing trace with hash -127484933, now seen corresponding path program 65 times [2019-12-27 23:13:51,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:51,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616139609] [2019-12-27 23:13:51,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:51,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616139609] [2019-12-27 23:13:51,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808539342] [2019-12-27 23:13:51,887 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 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 23:13:51,953 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:13:51,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:51,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:51,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:13:51,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:51,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:51,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [331048010] [2019-12-27 23:13:51,976 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:51,977 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:51,978 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 23:13:51,979 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:51,979 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:51,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:51,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:51,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:51,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:51,980 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand 11 states. [2019-12-27 23:13:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:52,175 INFO L93 Difference]: Finished difference Result 251 states and 545 transitions. [2019-12-27 23:13:52,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:13:52,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:52,178 INFO L225 Difference]: With dead ends: 251 [2019-12-27 23:13:52,178 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 23:13:52,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:13:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 23:13:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 105. [2019-12-27 23:13:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-12-27 23:13:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 245 transitions. [2019-12-27 23:13:52,181 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 245 transitions. Word has length 16 [2019-12-27 23:13:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:52,182 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 245 transitions. [2019-12-27 23:13:52,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 245 transitions. [2019-12-27 23:13:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 23:13:52,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:52,182 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:52,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:52,386 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:52,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1528529394, now seen corresponding path program 66 times [2019-12-27 23:13:52,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:52,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705788548] [2019-12-27 23:13:52,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:52,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705788548] [2019-12-27 23:13:52,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669139274] [2019-12-27 23:13:52,453 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 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 23:13:52,515 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:13:52,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:52,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:52,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:13:52,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:52,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2019-12-27 23:13:52,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1040781709] [2019-12-27 23:13:52,538 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:52,539 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:52,540 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 24 transitions. [2019-12-27 23:13:52,540 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:52,540 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:13:52,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 23:13:52,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:52,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 23:13:52,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:52,541 INFO L87 Difference]: Start difference. First operand 105 states and 245 transitions. Second operand 11 states. [2019-12-27 23:13:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:52,743 INFO L93 Difference]: Finished difference Result 271 states and 583 transitions. [2019-12-27 23:13:52,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 23:13:52,743 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-12-27 23:13:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:52,745 INFO L225 Difference]: With dead ends: 271 [2019-12-27 23:13:52,745 INFO L226 Difference]: Without dead ends: 269 [2019-12-27 23:13:52,746 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=498, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:13:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-12-27 23:13:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 98. [2019-12-27 23:13:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 23:13:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 224 transitions. [2019-12-27 23:13:52,749 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 224 transitions. Word has length 16 [2019-12-27 23:13:52,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:52,750 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 224 transitions. [2019-12-27 23:13:52,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 23:13:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 224 transitions. [2019-12-27 23:13:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:52,750 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:52,750 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:52,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:52,954 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:52,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:52,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1092314409, now seen corresponding path program 67 times [2019-12-27 23:13:52,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:52,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759405291] [2019-12-27 23:13:52,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:53,027 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 23:13:53,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759405291] [2019-12-27 23:13:53,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025729288] [2019-12-27 23:13:53,028 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 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 23:13:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:53,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:53,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:13:53,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:53,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:13:53,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [394913600] [2019-12-27 23:13:53,119 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:53,121 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:53,122 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 23:13:53,123 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:53,123 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:53,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:53,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:53,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:53,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:53,123 INFO L87 Difference]: Start difference. First operand 98 states and 224 transitions. Second operand 12 states. [2019-12-27 23:13:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:53,430 INFO L93 Difference]: Finished difference Result 311 states and 642 transitions. [2019-12-27 23:13:53,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:13:53,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:13:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:53,432 INFO L225 Difference]: With dead ends: 311 [2019-12-27 23:13:53,432 INFO L226 Difference]: Without dead ends: 309 [2019-12-27 23:13:53,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:13:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2019-12-27 23:13:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 100. [2019-12-27 23:13:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 23:13:53,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 231 transitions. [2019-12-27 23:13:53,436 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 231 transitions. Word has length 17 [2019-12-27 23:13:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:53,436 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 231 transitions. [2019-12-27 23:13:53,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:53,436 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 231 transitions. [2019-12-27 23:13:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:53,436 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:53,437 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:53,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:53,638 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:53,639 INFO L82 PathProgramCache]: Analyzing trace with hash 744359197, now seen corresponding path program 68 times [2019-12-27 23:13:53,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:53,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498784418] [2019-12-27 23:13:53,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:53,702 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 23:13:53,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498784418] [2019-12-27 23:13:53,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196298062] [2019-12-27 23:13:53,703 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 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 23:13:53,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:53,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:53,764 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:53,765 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:13:53,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:53,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:13:53,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1731482711] [2019-12-27 23:13:53,816 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:53,818 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:53,819 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 23:13:53,819 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:53,848 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:53,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:13:53,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:53,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:13:53,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:13:53,849 INFO L87 Difference]: Start difference. First operand 100 states and 231 transitions. Second operand 14 states. [2019-12-27 23:13:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:54,234 INFO L93 Difference]: Finished difference Result 303 states and 638 transitions. [2019-12-27 23:13:54,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:13:54,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:13:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:54,237 INFO L225 Difference]: With dead ends: 303 [2019-12-27 23:13:54,237 INFO L226 Difference]: Without dead ends: 301 [2019-12-27 23:13:54,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=1045, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:13:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-12-27 23:13:54,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 104. [2019-12-27 23:13:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 23:13:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 246 transitions. [2019-12-27 23:13:54,240 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 246 transitions. Word has length 17 [2019-12-27 23:13:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:54,240 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 246 transitions. [2019-12-27 23:13:54,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:13:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 246 transitions. [2019-12-27 23:13:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:54,241 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:54,241 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:54,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:54,442 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:54,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1703003786, now seen corresponding path program 69 times [2019-12-27 23:13:54,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:54,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581263238] [2019-12-27 23:13:54,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:54,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:54,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581263238] [2019-12-27 23:13:54,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634866063] [2019-12-27 23:13:54,512 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 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 23:13:54,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:13:54,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:54,574 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:54,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 23:13:54,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:54,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:13:54,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759887387] [2019-12-27 23:13:54,599 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:54,600 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:54,602 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 23:13:54,602 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:54,602 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:54,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:54,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:13:54,603 INFO L87 Difference]: Start difference. First operand 104 states and 246 transitions. Second operand 12 states. [2019-12-27 23:13:54,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:54,866 INFO L93 Difference]: Finished difference Result 273 states and 578 transitions. [2019-12-27 23:13:54,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:13:54,866 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:13:54,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:54,868 INFO L225 Difference]: With dead ends: 273 [2019-12-27 23:13:54,868 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 23:13:54,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:13:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 23:13:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 103. [2019-12-27 23:13:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 23:13:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 242 transitions. [2019-12-27 23:13:54,872 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 242 transitions. Word has length 17 [2019-12-27 23:13:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:54,872 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 242 transitions. [2019-12-27 23:13:54,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 242 transitions. [2019-12-27 23:13:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:54,873 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:54,873 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:55,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:55,074 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:55,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash 301959325, now seen corresponding path program 70 times [2019-12-27 23:13:55,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:55,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392306490] [2019-12-27 23:13:55,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:55,168 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 23:13:55,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392306490] [2019-12-27 23:13:55,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790038632] [2019-12-27 23:13:55,169 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 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 23:13:55,221 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:55,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:55,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:55,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:13:55,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:55,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:13:55,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [691204739] [2019-12-27 23:13:55,266 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:55,268 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:55,270 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 23:13:55,270 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:55,270 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:55,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:55,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:55,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:55,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:55,271 INFO L87 Difference]: Start difference. First operand 103 states and 242 transitions. Second operand 12 states. [2019-12-27 23:13:55,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:55,591 INFO L93 Difference]: Finished difference Result 299 states and 634 transitions. [2019-12-27 23:13:55,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:13:55,591 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:13:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:55,593 INFO L225 Difference]: With dead ends: 299 [2019-12-27 23:13:55,594 INFO L226 Difference]: Without dead ends: 297 [2019-12-27 23:13:55,594 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:13:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-12-27 23:13:55,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 102. [2019-12-27 23:13:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 23:13:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 238 transitions. [2019-12-27 23:13:55,597 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 238 transitions. Word has length 17 [2019-12-27 23:13:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:55,597 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 238 transitions. [2019-12-27 23:13:55,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 238 transitions. [2019-12-27 23:13:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:55,598 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:55,598 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:55,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:55,798 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1220298455, now seen corresponding path program 71 times [2019-12-27 23:13:55,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:55,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348312968] [2019-12-27 23:13:55,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:55,862 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 23:13:55,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348312968] [2019-12-27 23:13:55,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874163005] [2019-12-27 23:13:55,862 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 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 23:13:55,910 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:13:55,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:55,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:55,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:13:55,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:55,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:13:55,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1322654803] [2019-12-27 23:13:55,942 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:55,944 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:55,946 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 23:13:55,946 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:55,947 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:55,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:55,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:55,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:55,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:13:55,948 INFO L87 Difference]: Start difference. First operand 102 states and 238 transitions. Second operand 12 states. [2019-12-27 23:13:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:56,272 INFO L93 Difference]: Finished difference Result 304 states and 639 transitions. [2019-12-27 23:13:56,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:13:56,273 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:13:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:56,275 INFO L225 Difference]: With dead ends: 304 [2019-12-27 23:13:56,275 INFO L226 Difference]: Without dead ends: 302 [2019-12-27 23:13:56,276 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:13:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-12-27 23:13:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 104. [2019-12-27 23:13:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 23:13:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 243 transitions. [2019-12-27 23:13:56,279 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 243 transitions. Word has length 17 [2019-12-27 23:13:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:56,279 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 243 transitions. [2019-12-27 23:13:56,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 243 transitions. [2019-12-27 23:13:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:56,279 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:56,279 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:56,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:56,480 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash 556135907, now seen corresponding path program 72 times [2019-12-27 23:13:56,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:56,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504967733] [2019-12-27 23:13:56,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:56,548 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 23:13:56,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504967733] [2019-12-27 23:13:56,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596083428] [2019-12-27 23:13:56,549 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 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 23:13:56,620 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:13:56,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:56,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:13:56,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:13:56,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:56,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:13:56,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1500433195] [2019-12-27 23:13:56,655 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:56,656 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:56,658 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 23:13:56,659 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:56,716 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:13:56,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:13:56,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:56,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:13:56,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:13:56,717 INFO L87 Difference]: Start difference. First operand 104 states and 243 transitions. Second operand 16 states. [2019-12-27 23:13:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:57,219 INFO L93 Difference]: Finished difference Result 315 states and 687 transitions. [2019-12-27 23:13:57,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:13:57,220 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-12-27 23:13:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:57,222 INFO L225 Difference]: With dead ends: 315 [2019-12-27 23:13:57,222 INFO L226 Difference]: Without dead ends: 313 [2019-12-27 23:13:57,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=1261, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 23:13:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-27 23:13:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 110. [2019-12-27 23:13:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-12-27 23:13:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 265 transitions. [2019-12-27 23:13:57,227 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 265 transitions. Word has length 17 [2019-12-27 23:13:57,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:57,227 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 265 transitions. [2019-12-27 23:13:57,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:13:57,227 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 265 transitions. [2019-12-27 23:13:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:57,227 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:57,228 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:57,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:57,431 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:57,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1604382704, now seen corresponding path program 73 times [2019-12-27 23:13:57,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:57,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74073047] [2019-12-27 23:13:57,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:57,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74073047] [2019-12-27 23:13:57,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484510252] [2019-12-27 23:13:57,494 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 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 23:13:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:57,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:13:57,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:13:57,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:57,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2019-12-27 23:13:57,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [213307953] [2019-12-27 23:13:57,616 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:57,617 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:57,618 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:13:57,619 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:57,647 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:13:57,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:13:57,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:13:57,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:13:57,648 INFO L87 Difference]: Start difference. First operand 110 states and 265 transitions. Second operand 14 states. [2019-12-27 23:13:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:57,998 INFO L93 Difference]: Finished difference Result 279 states and 618 transitions. [2019-12-27 23:13:57,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:13:57,998 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:13:57,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:58,000 INFO L225 Difference]: With dead ends: 279 [2019-12-27 23:13:58,001 INFO L226 Difference]: Without dead ends: 277 [2019-12-27 23:13:58,001 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:13:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-12-27 23:13:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 111. [2019-12-27 23:13:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 23:13:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 269 transitions. [2019-12-27 23:13:58,004 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 269 transitions. Word has length 17 [2019-12-27 23:13:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:58,004 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 269 transitions. [2019-12-27 23:13:58,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:13:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 269 transitions. [2019-12-27 23:13:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:58,005 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:58,005 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:58,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:58,205 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -645738115, now seen corresponding path program 74 times [2019-12-27 23:13:58,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:58,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411707503] [2019-12-27 23:13:58,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:58,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411707503] [2019-12-27 23:13:58,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125717400] [2019-12-27 23:13:58,299 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 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 23:13:58,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:13:58,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:58,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:13:58,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 23:13:58,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:58,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 23:13:58,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1760728597] [2019-12-27 23:13:58,380 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:58,381 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:58,383 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 23:13:58,383 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:58,383 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:58,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:58,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:58,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:58,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:13:58,384 INFO L87 Difference]: Start difference. First operand 111 states and 269 transitions. Second operand 12 states. [2019-12-27 23:13:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:58,563 INFO L93 Difference]: Finished difference Result 239 states and 535 transitions. [2019-12-27 23:13:58,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:13:58,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:13:58,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:58,565 INFO L225 Difference]: With dead ends: 239 [2019-12-27 23:13:58,566 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 23:13:58,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:13:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 23:13:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 112. [2019-12-27 23:13:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 23:13:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 270 transitions. [2019-12-27 23:13:58,572 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 270 transitions. Word has length 17 [2019-12-27 23:13:58,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:58,572 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 270 transitions. [2019-12-27 23:13:58,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 270 transitions. [2019-12-27 23:13:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:58,573 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:58,573 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:58,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:58,776 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2046782576, now seen corresponding path program 75 times [2019-12-27 23:13:58,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:58,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149510456] [2019-12-27 23:13:58,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:58,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149510456] [2019-12-27 23:13:58,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512999192] [2019-12-27 23:13:58,839 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 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 23:13:58,905 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:13:58,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:58,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:58,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:13:58,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:58,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:13:58,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1414197677] [2019-12-27 23:13:58,928 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:58,929 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:58,930 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:13:58,930 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:58,931 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:58,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:58,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:58,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:13:58,931 INFO L87 Difference]: Start difference. First operand 112 states and 270 transitions. Second operand 12 states. [2019-12-27 23:13:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:59,182 INFO L93 Difference]: Finished difference Result 288 states and 642 transitions. [2019-12-27 23:13:59,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:13:59,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:13:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:59,184 INFO L225 Difference]: With dead ends: 288 [2019-12-27 23:13:59,184 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 23:13:59,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:13:59,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 23:13:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 111. [2019-12-27 23:13:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 23:13:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 266 transitions. [2019-12-27 23:13:59,188 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 266 transitions. Word has length 17 [2019-12-27 23:13:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:59,188 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 266 transitions. [2019-12-27 23:13:59,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 266 transitions. [2019-12-27 23:13:59,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:59,189 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:59,189 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:13:59,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:13:59,392 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:13:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:13:59,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1128443446, now seen corresponding path program 76 times [2019-12-27 23:13:59,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:13:59,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188065918] [2019-12-27 23:13:59,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:13:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:13:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:13:59,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188065918] [2019-12-27 23:13:59,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888584762] [2019-12-27 23:13:59,469 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 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 23:13:59,532 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:13:59,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:13:59,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:13:59,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:13:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:13:59,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:13:59,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:13:59,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1212201344] [2019-12-27 23:13:59,559 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:13:59,560 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:13:59,562 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:13:59,562 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:13:59,562 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:13:59,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:13:59,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:13:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:13:59,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:13:59,563 INFO L87 Difference]: Start difference. First operand 111 states and 266 transitions. Second operand 12 states. [2019-12-27 23:13:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:13:59,826 INFO L93 Difference]: Finished difference Result 288 states and 641 transitions. [2019-12-27 23:13:59,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:13:59,827 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:13:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:13:59,829 INFO L225 Difference]: With dead ends: 288 [2019-12-27 23:13:59,829 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 23:13:59,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:13:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 23:13:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 108. [2019-12-27 23:13:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-12-27 23:13:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 255 transitions. [2019-12-27 23:13:59,832 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 255 transitions. Word has length 17 [2019-12-27 23:13:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:13:59,832 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 255 transitions. [2019-12-27 23:13:59,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:13:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 255 transitions. [2019-12-27 23:13:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:13:59,833 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:13:59,833 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:00,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:00,036 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash 611621219, now seen corresponding path program 77 times [2019-12-27 23:14:00,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:00,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6845267] [2019-12-27 23:14:00,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:00,099 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 23:14:00,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6845267] [2019-12-27 23:14:00,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037678074] [2019-12-27 23:14:00,099 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 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 23:14:00,145 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:14:00,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:00,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:00,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:00,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:00,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:00,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [300152245] [2019-12-27 23:14:00,179 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:00,180 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:00,181 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:14:00,181 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:00,208 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:00,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:00,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:00,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:00,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:00,209 INFO L87 Difference]: Start difference. First operand 108 states and 255 transitions. Second operand 14 states. [2019-12-27 23:14:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:00,590 INFO L93 Difference]: Finished difference Result 306 states and 674 transitions. [2019-12-27 23:14:00,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:14:00,591 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:00,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:00,593 INFO L225 Difference]: With dead ends: 306 [2019-12-27 23:14:00,593 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 23:14:00,593 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:14:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 23:14:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 111. [2019-12-27 23:14:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 23:14:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 266 transitions. [2019-12-27 23:14:00,597 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 266 transitions. Word has length 17 [2019-12-27 23:14:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:00,597 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 266 transitions. [2019-12-27 23:14:00,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 266 transitions. [2019-12-27 23:14:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:00,597 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:00,598 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:00,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:00,798 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1570265808, now seen corresponding path program 78 times [2019-12-27 23:14:00,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:00,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925107922] [2019-12-27 23:14:00,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:00,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925107922] [2019-12-27 23:14:00,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015222181] [2019-12-27 23:14:00,865 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 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 23:14:00,931 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:00,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:00,933 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:00,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:14:00,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:00,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:00,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [336897082] [2019-12-27 23:14:00,957 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:00,958 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:00,960 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 23:14:00,960 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:00,960 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:00,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:00,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:00,961 INFO L87 Difference]: Start difference. First operand 111 states and 266 transitions. Second operand 12 states. [2019-12-27 23:14:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:01,228 INFO L93 Difference]: Finished difference Result 291 states and 646 transitions. [2019-12-27 23:14:01,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:14:01,228 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:01,231 INFO L225 Difference]: With dead ends: 291 [2019-12-27 23:14:01,231 INFO L226 Difference]: Without dead ends: 289 [2019-12-27 23:14:01,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:14:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-12-27 23:14:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 110. [2019-12-27 23:14:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-12-27 23:14:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 262 transitions. [2019-12-27 23:14:01,234 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 262 transitions. Word has length 17 [2019-12-27 23:14:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:01,234 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 262 transitions. [2019-12-27 23:14:01,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 262 transitions. [2019-12-27 23:14:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:01,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:01,235 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:01,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:01,436 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 169221347, now seen corresponding path program 79 times [2019-12-27 23:14:01,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:01,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541209493] [2019-12-27 23:14:01,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:01,505 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 23:14:01,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541209493] [2019-12-27 23:14:01,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930092711] [2019-12-27 23:14:01,506 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 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 23:14:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:01,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:01,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:14:01,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:01,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:01,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1975934002] [2019-12-27 23:14:01,599 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:01,600 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:01,601 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:14:01,601 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:01,601 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:01,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:01,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:01,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:01,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:01,602 INFO L87 Difference]: Start difference. First operand 110 states and 262 transitions. Second operand 12 states. [2019-12-27 23:14:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:01,878 INFO L93 Difference]: Finished difference Result 308 states and 680 transitions. [2019-12-27 23:14:01,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:14:01,878 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:01,881 INFO L225 Difference]: With dead ends: 308 [2019-12-27 23:14:01,881 INFO L226 Difference]: Without dead ends: 306 [2019-12-27 23:14:01,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:14:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-12-27 23:14:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 107. [2019-12-27 23:14:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 23:14:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 251 transitions. [2019-12-27 23:14:01,884 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 251 transitions. Word has length 17 [2019-12-27 23:14:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:01,884 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 251 transitions. [2019-12-27 23:14:01,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 251 transitions. [2019-12-27 23:14:01,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:01,885 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:01,885 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:02,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:02,086 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:02,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:02,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1627737827, now seen corresponding path program 80 times [2019-12-27 23:14:02,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:02,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772256697] [2019-12-27 23:14:02,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:02,168 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 23:14:02,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772256697] [2019-12-27 23:14:02,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937914682] [2019-12-27 23:14:02,168 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 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 23:14:02,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:02,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:02,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:02,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:02,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:02,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:02,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1254855984] [2019-12-27 23:14:02,266 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:02,268 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:02,270 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:14:02,270 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:02,304 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:02,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:02,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:02,305 INFO L87 Difference]: Start difference. First operand 107 states and 251 transitions. Second operand 14 states. [2019-12-27 23:14:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:02,706 INFO L93 Difference]: Finished difference Result 306 states and 671 transitions. [2019-12-27 23:14:02,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:14:02,706 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:02,707 INFO L225 Difference]: With dead ends: 306 [2019-12-27 23:14:02,707 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 23:14:02,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=416, Invalid=990, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:14:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 23:14:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 113. [2019-12-27 23:14:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 23:14:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 271 transitions. [2019-12-27 23:14:02,710 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 271 transitions. Word has length 17 [2019-12-27 23:14:02,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:02,710 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 271 transitions. [2019-12-27 23:14:02,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 271 transitions. [2019-12-27 23:14:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:02,711 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:02,711 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:02,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:02,912 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash -669093238, now seen corresponding path program 81 times [2019-12-27 23:14:02,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:02,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848428054] [2019-12-27 23:14:02,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:02,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848428054] [2019-12-27 23:14:02,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768770490] [2019-12-27 23:14:02,978 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 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 23:14:03,040 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:14:03,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:03,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:03,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:14:03,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:03,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:03,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [530598138] [2019-12-27 23:14:03,070 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:03,071 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:03,072 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 23:14:03,072 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:03,072 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:03,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:03,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:03,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:03,073 INFO L87 Difference]: Start difference. First operand 113 states and 271 transitions. Second operand 12 states. [2019-12-27 23:14:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:03,364 INFO L93 Difference]: Finished difference Result 288 states and 635 transitions. [2019-12-27 23:14:03,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:14:03,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:03,367 INFO L225 Difference]: With dead ends: 288 [2019-12-27 23:14:03,367 INFO L226 Difference]: Without dead ends: 286 [2019-12-27 23:14:03,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:14:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-12-27 23:14:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 112. [2019-12-27 23:14:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 23:14:03,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 267 transitions. [2019-12-27 23:14:03,371 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 267 transitions. Word has length 17 [2019-12-27 23:14:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:03,371 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 267 transitions. [2019-12-27 23:14:03,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 267 transitions. [2019-12-27 23:14:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:03,372 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:03,372 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:03,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:03,575 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:03,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2070137699, now seen corresponding path program 82 times [2019-12-27 23:14:03,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:03,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747294250] [2019-12-27 23:14:03,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:03,641 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 23:14:03,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747294250] [2019-12-27 23:14:03,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889219499] [2019-12-27 23:14:03,642 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 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 23:14:03,703 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:03,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:03,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:03,704 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:03,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:03,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:03,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [11563546] [2019-12-27 23:14:03,751 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:03,753 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:03,754 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:14:03,754 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:03,755 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:03,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:03,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:03,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:03,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:03,755 INFO L87 Difference]: Start difference. First operand 112 states and 267 transitions. Second operand 12 states. [2019-12-27 23:14:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:04,068 INFO L93 Difference]: Finished difference Result 298 states and 658 transitions. [2019-12-27 23:14:04,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:14:04,069 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:04,071 INFO L225 Difference]: With dead ends: 298 [2019-12-27 23:14:04,071 INFO L226 Difference]: Without dead ends: 296 [2019-12-27 23:14:04,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:14:04,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-12-27 23:14:04,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 111. [2019-12-27 23:14:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 23:14:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 263 transitions. [2019-12-27 23:14:04,075 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 263 transitions. Word has length 17 [2019-12-27 23:14:04,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:04,075 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 263 transitions. [2019-12-27 23:14:04,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 263 transitions. [2019-12-27 23:14:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:04,075 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:04,075 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:04,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:04,277 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1151798569, now seen corresponding path program 83 times [2019-12-27 23:14:04,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:04,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881556614] [2019-12-27 23:14:04,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:04,342 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 23:14:04,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881556614] [2019-12-27 23:14:04,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252976963] [2019-12-27 23:14:04,343 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 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 23:14:04,389 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:14:04,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:04,390 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:04,390 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:14:04,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:04,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:04,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [317507695] [2019-12-27 23:14:04,438 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:04,439 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:04,440 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:14:04,440 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:04,440 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:04,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:04,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:04,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:04,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:04,441 INFO L87 Difference]: Start difference. First operand 111 states and 263 transitions. Second operand 12 states. [2019-12-27 23:14:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:04,744 INFO L93 Difference]: Finished difference Result 310 states and 676 transitions. [2019-12-27 23:14:04,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:14:04,745 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:04,747 INFO L225 Difference]: With dead ends: 310 [2019-12-27 23:14:04,747 INFO L226 Difference]: Without dead ends: 308 [2019-12-27 23:14:04,748 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:14:04,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2019-12-27 23:14:04,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 109. [2019-12-27 23:14:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-12-27 23:14:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 256 transitions. [2019-12-27 23:14:04,751 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 256 transitions. Word has length 17 [2019-12-27 23:14:04,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:04,751 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 256 transitions. [2019-12-27 23:14:04,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 256 transitions. [2019-12-27 23:14:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:04,752 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:04,752 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:04,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:04,953 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:04,953 INFO L82 PathProgramCache]: Analyzing trace with hash 62180649, now seen corresponding path program 84 times [2019-12-27 23:14:04,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:04,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485765316] [2019-12-27 23:14:04,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:05,032 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 23:14:05,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485765316] [2019-12-27 23:14:05,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774118376] [2019-12-27 23:14:05,033 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 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 23:14:05,119 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:05,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:05,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:05,120 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:14:05,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:05,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:05,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1448158836] [2019-12-27 23:14:05,167 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:05,169 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:05,171 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 23:14:05,171 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:05,267 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:14:05,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:14:05,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:05,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:14:05,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:14:05,269 INFO L87 Difference]: Start difference. First operand 109 states and 256 transitions. Second operand 18 states. [2019-12-27 23:14:05,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:05,946 INFO L93 Difference]: Finished difference Result 339 states and 742 transitions. [2019-12-27 23:14:05,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:14:05,946 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2019-12-27 23:14:05,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:05,949 INFO L225 Difference]: With dead ends: 339 [2019-12-27 23:14:05,949 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 23:14:05,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=682, Invalid=1670, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 23:14:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 23:14:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 113. [2019-12-27 23:14:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 23:14:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 270 transitions. [2019-12-27 23:14:05,953 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 270 transitions. Word has length 17 [2019-12-27 23:14:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:05,954 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 270 transitions. [2019-12-27 23:14:05,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:14:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 270 transitions. [2019-12-27 23:14:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:05,954 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:05,954 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:06,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:06,158 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:06,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1727000554, now seen corresponding path program 85 times [2019-12-27 23:14:06,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:06,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973538802] [2019-12-27 23:14:06,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:06,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973538802] [2019-12-27 23:14:06,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525958376] [2019-12-27 23:14:06,221 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 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 23:14:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:06,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:14:06,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:06,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:06,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2019-12-27 23:14:06,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1900092890] [2019-12-27 23:14:06,346 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:06,348 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:06,350 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 23:14:06,350 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:06,421 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:14:06,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:14:06,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:06,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:14:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:14:06,422 INFO L87 Difference]: Start difference. First operand 113 states and 270 transitions. Second operand 16 states. [2019-12-27 23:14:06,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:06,852 INFO L93 Difference]: Finished difference Result 299 states and 664 transitions. [2019-12-27 23:14:06,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:14:06,853 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-12-27 23:14:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:06,855 INFO L225 Difference]: With dead ends: 299 [2019-12-27 23:14:06,855 INFO L226 Difference]: Without dead ends: 297 [2019-12-27 23:14:06,856 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=1114, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:14:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-12-27 23:14:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 113. [2019-12-27 23:14:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 23:14:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 270 transitions. [2019-12-27 23:14:06,864 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 270 transitions. Word has length 17 [2019-12-27 23:14:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:06,864 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 270 transitions. [2019-12-27 23:14:06,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:14:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 270 transitions. [2019-12-27 23:14:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:06,865 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:06,865 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:07,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:07,066 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 407448131, now seen corresponding path program 86 times [2019-12-27 23:14:07,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:07,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012215482] [2019-12-27 23:14:07,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:07,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012215482] [2019-12-27 23:14:07,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598789065] [2019-12-27 23:14:07,135 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 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 23:14:07,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:07,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:07,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 23:14:07,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:07,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:07,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2019-12-27 23:14:07,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [840928203] [2019-12-27 23:14:07,282 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:07,283 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:07,285 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 41 transitions. [2019-12-27 23:14:07,285 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:07,325 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 23:14:07,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:07,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:07,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:07,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:14:07,326 INFO L87 Difference]: Start difference. First operand 113 states and 270 transitions. Second operand 14 states. [2019-12-27 23:14:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:07,592 INFO L93 Difference]: Finished difference Result 251 states and 566 transitions. [2019-12-27 23:14:07,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:14:07,593 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:07,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:07,595 INFO L225 Difference]: With dead ends: 251 [2019-12-27 23:14:07,595 INFO L226 Difference]: Without dead ends: 249 [2019-12-27 23:14:07,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:14:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-12-27 23:14:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 115. [2019-12-27 23:14:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 23:14:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 23:14:07,599 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 23:14:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:07,599 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 23:14:07,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 23:14:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:07,600 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:07,600 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:07,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:07,804 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:07,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash -34951741, now seen corresponding path program 87 times [2019-12-27 23:14:07,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:07,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48035103] [2019-12-27 23:14:07,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:07,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48035103] [2019-12-27 23:14:07,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373081926] [2019-12-27 23:14:07,867 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 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 23:14:07,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:14:07,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:07,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:14:07,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:14:07,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:07,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 23:14:07,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1163775808] [2019-12-27 23:14:07,946 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:07,946 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:07,948 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 23:14:07,948 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:07,949 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:14:07,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:07,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:07,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:07,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:14:07,950 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 23:14:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:08,114 INFO L93 Difference]: Finished difference Result 257 states and 585 transitions. [2019-12-27 23:14:08,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:14:08,115 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:08,117 INFO L225 Difference]: With dead ends: 257 [2019-12-27 23:14:08,117 INFO L226 Difference]: Without dead ends: 255 [2019-12-27 23:14:08,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:14:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-27 23:14:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 115. [2019-12-27 23:14:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 23:14:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 23:14:08,120 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 23:14:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:08,120 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 23:14:08,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 23:14:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:08,121 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:08,121 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:08,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:08,322 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:08,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:08,322 INFO L82 PathProgramCache]: Analyzing trace with hash 883387389, now seen corresponding path program 88 times [2019-12-27 23:14:08,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:08,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838896408] [2019-12-27 23:14:08,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:08,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838896408] [2019-12-27 23:14:08,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350838650] [2019-12-27 23:14:08,417 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 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 23:14:08,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:08,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:08,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:14:08,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 23:14:08,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:08,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 23:14:08,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1353136336] [2019-12-27 23:14:08,544 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:08,546 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:08,548 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 23:14:08,549 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:08,550 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:14:08,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:08,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:08,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:08,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:14:08,551 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 23:14:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:08,721 INFO L93 Difference]: Finished difference Result 267 states and 612 transitions. [2019-12-27 23:14:08,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:14:08,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:08,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:08,724 INFO L225 Difference]: With dead ends: 267 [2019-12-27 23:14:08,724 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 23:14:08,725 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:14:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 23:14:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 115. [2019-12-27 23:14:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 23:14:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 23:14:08,729 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 23:14:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:08,729 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 23:14:08,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 23:14:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:08,730 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:08,730 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:08,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:08,933 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:08,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1671515242, now seen corresponding path program 89 times [2019-12-27 23:14:08,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:08,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608333004] [2019-12-27 23:14:08,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:08,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608333004] [2019-12-27 23:14:08,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767688794] [2019-12-27 23:14:08,998 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 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 23:14:09,058 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:14:09,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:09,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:14:09,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:09,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:09,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 23:14:09,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [561565207] [2019-12-27 23:14:09,067 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:09,068 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:09,069 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 23:14:09,069 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:09,091 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:14:09,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:09,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:09,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:09,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:09,092 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 14 states. [2019-12-27 23:14:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:09,351 INFO L93 Difference]: Finished difference Result 302 states and 680 transitions. [2019-12-27 23:14:09,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:14:09,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:09,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:09,354 INFO L225 Difference]: With dead ends: 302 [2019-12-27 23:14:09,354 INFO L226 Difference]: Without dead ends: 300 [2019-12-27 23:14:09,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:14:09,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-27 23:14:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 117. [2019-12-27 23:14:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2019-12-27 23:14:09,359 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 17 [2019-12-27 23:14:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:09,359 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2019-12-27 23:14:09,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2019-12-27 23:14:09,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:09,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:09,360 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:09,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:09,563 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:09,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash -712870653, now seen corresponding path program 90 times [2019-12-27 23:14:09,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:09,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012801612] [2019-12-27 23:14:09,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:09,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012801612] [2019-12-27 23:14:09,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199671138] [2019-12-27 23:14:09,639 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 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 23:14:09,698 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 23:14:09,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:09,699 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:14:09,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 23:14:09,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:09,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 23:14:09,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [517261668] [2019-12-27 23:14:09,715 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:09,716 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:09,718 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 23:14:09,719 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:09,720 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:14:09,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:09,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:09,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:09,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:14:09,721 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 12 states. [2019-12-27 23:14:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:09,894 INFO L93 Difference]: Finished difference Result 273 states and 623 transitions. [2019-12-27 23:14:09,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:14:09,894 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:09,896 INFO L225 Difference]: With dead ends: 273 [2019-12-27 23:14:09,896 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 23:14:09,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:14:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 23:14:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 117. [2019-12-27 23:14:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2019-12-27 23:14:09,900 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 17 [2019-12-27 23:14:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:09,900 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2019-12-27 23:14:09,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2019-12-27 23:14:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:09,901 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:09,901 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:10,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:10,104 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2113915114, now seen corresponding path program 91 times [2019-12-27 23:14:10,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:10,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558067096] [2019-12-27 23:14:10,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:10,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558067096] [2019-12-27 23:14:10,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967732325] [2019-12-27 23:14:10,164 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 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 23:14:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:10,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:10,223 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:14:10,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:10,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:10,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [495363094] [2019-12-27 23:14:10,265 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:10,266 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:10,268 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 23:14:10,268 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:10,269 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:14:10,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:10,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:10,270 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 12 states. [2019-12-27 23:14:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:10,455 INFO L93 Difference]: Finished difference Result 295 states and 665 transitions. [2019-12-27 23:14:10,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:14:10,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:10,457 INFO L225 Difference]: With dead ends: 295 [2019-12-27 23:14:10,457 INFO L226 Difference]: Without dead ends: 293 [2019-12-27 23:14:10,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:14:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-12-27 23:14:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 115. [2019-12-27 23:14:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 23:14:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 23:14:10,462 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 23:14:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:10,462 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 23:14:10,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 23:14:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:10,463 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:10,463 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:10,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:10,666 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:10,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:10,667 INFO L82 PathProgramCache]: Analyzing trace with hash 384093008, now seen corresponding path program 92 times [2019-12-27 23:14:10,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:10,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817399187] [2019-12-27 23:14:10,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:10,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817399187] [2019-12-27 23:14:10,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157405806] [2019-12-27 23:14:10,733 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 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 23:14:10,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:10,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:10,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:14:10,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:10,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:10,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2019-12-27 23:14:10,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [908820873] [2019-12-27 23:14:10,858 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:10,860 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:10,862 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 23:14:10,863 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:10,915 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:14:10,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:10,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:10,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:10,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:10,916 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 14 states. [2019-12-27 23:14:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:11,287 INFO L93 Difference]: Finished difference Result 297 states and 672 transitions. [2019-12-27 23:14:11,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:14:11,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:11,288 INFO L225 Difference]: With dead ends: 297 [2019-12-27 23:14:11,289 INFO L226 Difference]: Without dead ends: 295 [2019-12-27 23:14:11,289 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:14:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2019-12-27 23:14:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 116. [2019-12-27 23:14:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 23:14:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 23:14:11,293 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 23:14:11,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:11,293 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 23:14:11,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 23:14:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:11,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:11,294 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:11,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:11,498 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:11,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:11,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1342737597, now seen corresponding path program 93 times [2019-12-27 23:14:11,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:11,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491570415] [2019-12-27 23:14:11,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:11,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491570415] [2019-12-27 23:14:11,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850049359] [2019-12-27 23:14:11,565 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 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 23:14:11,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:14:11,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:11,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:14:11,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 23:14:11,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:11,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 23:14:11,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [33232565] [2019-12-27 23:14:11,647 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:11,648 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:11,650 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 23:14:11,650 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:11,651 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:14:11,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:11,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:11,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:11,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:14:11,652 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 23:14:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:11,834 INFO L93 Difference]: Finished difference Result 266 states and 613 transitions. [2019-12-27 23:14:11,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:14:11,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:11,836 INFO L225 Difference]: With dead ends: 266 [2019-12-27 23:14:11,836 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 23:14:11,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:14:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 23:14:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 116. [2019-12-27 23:14:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 23:14:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 23:14:11,839 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 23:14:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:11,840 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 23:14:11,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 23:14:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:11,841 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:11,841 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:12,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:12,044 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:12,045 INFO L82 PathProgramCache]: Analyzing trace with hash -58306864, now seen corresponding path program 94 times [2019-12-27 23:14:12,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:12,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597498930] [2019-12-27 23:14:12,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:12,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597498930] [2019-12-27 23:14:12,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098468824] [2019-12-27 23:14:12,122 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 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 23:14:12,199 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:12,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:12,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:12,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:12,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:12,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:12,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1174199120] [2019-12-27 23:14:12,254 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:12,256 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:12,259 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:14:12,260 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:12,261 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:14:12,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:12,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:12,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:12,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:12,262 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 23:14:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:12,567 INFO L93 Difference]: Finished difference Result 298 states and 684 transitions. [2019-12-27 23:14:12,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 23:14:12,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:12,569 INFO L225 Difference]: With dead ends: 298 [2019-12-27 23:14:12,569 INFO L226 Difference]: Without dead ends: 296 [2019-12-27 23:14:12,570 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:14:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-12-27 23:14:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 115. [2019-12-27 23:14:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 23:14:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 23:14:12,575 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 23:14:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:12,576 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 23:14:12,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 23:14:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:12,577 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:12,577 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:12,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:12,778 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:12,779 INFO L82 PathProgramCache]: Analyzing trace with hash 860032266, now seen corresponding path program 95 times [2019-12-27 23:14:12,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:12,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561407781] [2019-12-27 23:14:12,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:12,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561407781] [2019-12-27 23:14:12,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064615013] [2019-12-27 23:14:12,905 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 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 23:14:13,003 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:14:13,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:13,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:13,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:14:13,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:13,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:13,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1538991937] [2019-12-27 23:14:13,056 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:13,058 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:13,061 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 23:14:13,062 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:13,063 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:14:13,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:13,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:13,065 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 23:14:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:13,399 INFO L93 Difference]: Finished difference Result 292 states and 666 transitions. [2019-12-27 23:14:13,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 23:14:13,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:13,402 INFO L225 Difference]: With dead ends: 292 [2019-12-27 23:14:13,402 INFO L226 Difference]: Without dead ends: 290 [2019-12-27 23:14:13,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:14:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-12-27 23:14:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 111. [2019-12-27 23:14:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 23:14:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 262 transitions. [2019-12-27 23:14:13,408 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 262 transitions. Word has length 17 [2019-12-27 23:14:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:13,408 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 262 transitions. [2019-12-27 23:14:13,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 262 transitions. [2019-12-27 23:14:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:13,409 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:13,409 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:13,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:13,614 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:13,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:13,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1843957929, now seen corresponding path program 96 times [2019-12-27 23:14:13,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:13,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083019421] [2019-12-27 23:14:13,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:13,697 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 23:14:13,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083019421] [2019-12-27 23:14:13,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510830126] [2019-12-27 23:14:13,698 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 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 23:14:13,771 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:14:13,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:13,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:13,773 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:13,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:13,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:13,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1574211764] [2019-12-27 23:14:13,817 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:13,818 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:13,819 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 33 transitions. [2019-12-27 23:14:13,819 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:13,892 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:14:13,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:14:13,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:13,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:14:13,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:13,893 INFO L87 Difference]: Start difference. First operand 111 states and 262 transitions. Second operand 16 states. [2019-12-27 23:14:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:14,373 INFO L93 Difference]: Finished difference Result 344 states and 765 transitions. [2019-12-27 23:14:14,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:14:14,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-12-27 23:14:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:14,375 INFO L225 Difference]: With dead ends: 344 [2019-12-27 23:14:14,375 INFO L226 Difference]: Without dead ends: 342 [2019-12-27 23:14:14,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1154, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:14:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-12-27 23:14:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 116. [2019-12-27 23:14:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 23:14:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 23:14:14,379 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 23:14:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:14,379 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 23:14:14,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:14:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 23:14:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:14,379 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:14,379 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:14,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:14,580 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:14,581 INFO L82 PathProgramCache]: Analyzing trace with hash -316560682, now seen corresponding path program 97 times [2019-12-27 23:14:14,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:14,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324460964] [2019-12-27 23:14:14,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:14,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324460964] [2019-12-27 23:14:14,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500909025] [2019-12-27 23:14:14,655 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 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 23:14:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:14,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:14:14,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:14,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:14,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2019-12-27 23:14:14,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [150242593] [2019-12-27 23:14:14,780 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:14,781 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:14,783 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:14:14,783 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:14,818 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:14:14,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:14,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:14,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:14,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:14,819 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 14 states. [2019-12-27 23:14:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:15,146 INFO L93 Difference]: Finished difference Result 306 states and 686 transitions. [2019-12-27 23:14:15,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:14:15,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:15,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:15,147 INFO L225 Difference]: With dead ends: 306 [2019-12-27 23:14:15,148 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 23:14:15,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:14:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 23:14:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 117. [2019-12-27 23:14:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 23:14:15,152 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 23:14:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:15,152 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 23:14:15,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 23:14:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:15,153 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:15,153 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:15,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:15,354 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:15,354 INFO L82 PathProgramCache]: Analyzing trace with hash 642083907, now seen corresponding path program 98 times [2019-12-27 23:14:15,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:15,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020690861] [2019-12-27 23:14:15,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:15,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020690861] [2019-12-27 23:14:15,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830060685] [2019-12-27 23:14:15,424 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 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 23:14:15,486 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:15,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:15,487 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:14:15,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:14:15,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:15,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 23:14:15,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1921925563] [2019-12-27 23:14:15,511 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:15,512 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:15,514 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 23:14:15,514 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:15,515 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:15,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:15,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:15,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:15,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:14:15,515 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 23:14:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:15,676 INFO L93 Difference]: Finished difference Result 273 states and 622 transitions. [2019-12-27 23:14:15,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:14:15,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:15,677 INFO L225 Difference]: With dead ends: 273 [2019-12-27 23:14:15,677 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 23:14:15,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:14:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 23:14:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 117. [2019-12-27 23:14:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 23:14:15,682 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 23:14:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:15,682 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 23:14:15,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 23:14:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:15,682 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:15,682 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:15,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:15,883 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:15,884 INFO L82 PathProgramCache]: Analyzing trace with hash -758960554, now seen corresponding path program 99 times [2019-12-27 23:14:15,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:15,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512158689] [2019-12-27 23:14:15,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:15,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512158689] [2019-12-27 23:14:15,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677395174] [2019-12-27 23:14:15,945 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 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 23:14:16,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:14:16,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:16,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:16,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:14:16,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:16,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:16,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [77935767] [2019-12-27 23:14:16,091 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:16,092 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:16,093 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:14:16,093 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:16,094 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:16,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:16,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:16,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:16,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:16,095 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 23:14:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:16,317 INFO L93 Difference]: Finished difference Result 303 states and 687 transitions. [2019-12-27 23:14:16,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:14:16,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:16,319 INFO L225 Difference]: With dead ends: 303 [2019-12-27 23:14:16,319 INFO L226 Difference]: Without dead ends: 301 [2019-12-27 23:14:16,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:14:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-12-27 23:14:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 116. [2019-12-27 23:14:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 23:14:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 23:14:16,323 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 23:14:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:16,323 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 23:14:16,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 23:14:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:16,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:16,324 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:16,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:16,525 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash 159378576, now seen corresponding path program 100 times [2019-12-27 23:14:16,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:16,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119861785] [2019-12-27 23:14:16,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:16,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119861785] [2019-12-27 23:14:16,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155414071] [2019-12-27 23:14:16,623 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 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 23:14:16,729 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:16,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:16,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:16,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:16,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:16,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:16,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759769323] [2019-12-27 23:14:16,784 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:16,787 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:16,790 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:14:16,790 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:16,791 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:16,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:16,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:16,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:16,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:16,792 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 23:14:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:17,152 INFO L93 Difference]: Finished difference Result 306 states and 695 transitions. [2019-12-27 23:14:17,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:14:17,153 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:17,155 INFO L225 Difference]: With dead ends: 306 [2019-12-27 23:14:17,155 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 23:14:17,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:14:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 23:14:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 113. [2019-12-27 23:14:17,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 23:14:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 269 transitions. [2019-12-27 23:14:17,160 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 269 transitions. Word has length 17 [2019-12-27 23:14:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:17,160 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 269 transitions. [2019-12-27 23:14:17,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 269 transitions. [2019-12-27 23:14:17,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:17,162 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:17,162 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:17,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:17,367 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:17,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1899443241, now seen corresponding path program 101 times [2019-12-27 23:14:17,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:17,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391949541] [2019-12-27 23:14:17,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:17,453 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 23:14:17,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391949541] [2019-12-27 23:14:17,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645106561] [2019-12-27 23:14:17,454 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 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 23:14:17,515 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:14:17,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:17,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:14:17,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:17,530 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 23:14:17,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:17,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 23:14:17,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [586643909] [2019-12-27 23:14:17,531 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:17,532 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:17,534 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:14:17,534 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:17,575 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:14:17,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:17,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:17,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:17,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:17,576 INFO L87 Difference]: Start difference. First operand 113 states and 269 transitions. Second operand 14 states. [2019-12-27 23:14:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:17,924 INFO L93 Difference]: Finished difference Result 333 states and 746 transitions. [2019-12-27 23:14:17,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:14:17,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:17,926 INFO L225 Difference]: With dead ends: 333 [2019-12-27 23:14:17,926 INFO L226 Difference]: Without dead ends: 331 [2019-12-27 23:14:17,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:14:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-27 23:14:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 116. [2019-12-27 23:14:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 23:14:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 23:14:17,936 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 23:14:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:17,937 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 23:14:17,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 23:14:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:17,938 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:17,938 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:18,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:18,143 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1436879466, now seen corresponding path program 102 times [2019-12-27 23:14:18,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:18,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100698909] [2019-12-27 23:14:18,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:18,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100698909] [2019-12-27 23:14:18,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717673950] [2019-12-27 23:14:18,263 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 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 23:14:18,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:18,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:18,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:18,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:14:18,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:18,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:18,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2021101807] [2019-12-27 23:14:18,413 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:18,414 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:18,416 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 23:14:18,417 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:18,423 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:18,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:18,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:18,424 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 23:14:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:18,661 INFO L93 Difference]: Finished difference Result 308 states and 694 transitions. [2019-12-27 23:14:18,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:14:18,662 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:18,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:18,663 INFO L225 Difference]: With dead ends: 308 [2019-12-27 23:14:18,663 INFO L226 Difference]: Without dead ends: 306 [2019-12-27 23:14:18,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:14:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-12-27 23:14:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 115. [2019-12-27 23:14:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 23:14:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 23:14:18,667 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 23:14:18,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:18,668 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 23:14:18,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:18,668 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 23:14:18,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:18,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:18,668 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:18,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:18,872 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1457043369, now seen corresponding path program 103 times [2019-12-27 23:14:18,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:18,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845306641] [2019-12-27 23:14:18,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:18,934 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 23:14:18,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845306641] [2019-12-27 23:14:18,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626373033] [2019-12-27 23:14:18,935 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 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 23:14:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:18,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:18,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:14:19,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:19,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:19,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [362634289] [2019-12-27 23:14:19,035 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:19,036 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:19,038 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:14:19,038 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:19,038 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:19,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:19,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:19,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:19,039 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 23:14:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:19,279 INFO L93 Difference]: Finished difference Result 331 states and 743 transitions. [2019-12-27 23:14:19,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:14:19,279 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:19,280 INFO L225 Difference]: With dead ends: 331 [2019-12-27 23:14:19,281 INFO L226 Difference]: Without dead ends: 329 [2019-12-27 23:14:19,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:14:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2019-12-27 23:14:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 111. [2019-12-27 23:14:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-12-27 23:14:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 262 transitions. [2019-12-27 23:14:19,284 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 262 transitions. Word has length 17 [2019-12-27 23:14:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:19,285 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 262 transitions. [2019-12-27 23:14:19,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 262 transitions. [2019-12-27 23:14:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:19,285 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:19,285 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:19,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:19,486 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1598530019, now seen corresponding path program 104 times [2019-12-27 23:14:19,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:19,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697882424] [2019-12-27 23:14:19,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:19,548 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 23:14:19,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697882424] [2019-12-27 23:14:19,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344800078] [2019-12-27 23:14:19,549 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 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 23:14:19,611 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:19,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:19,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:19,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:19,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:19,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:19,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2094376809] [2019-12-27 23:14:19,646 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:19,646 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:19,648 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 23:14:19,648 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:19,708 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:14:19,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:14:19,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:19,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:14:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:19,709 INFO L87 Difference]: Start difference. First operand 111 states and 262 transitions. Second operand 16 states. [2019-12-27 23:14:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:20,193 INFO L93 Difference]: Finished difference Result 346 states and 770 transitions. [2019-12-27 23:14:20,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:14:20,193 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-12-27 23:14:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:20,194 INFO L225 Difference]: With dead ends: 346 [2019-12-27 23:14:20,194 INFO L226 Difference]: Without dead ends: 344 [2019-12-27 23:14:20,195 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=1207, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:14:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-12-27 23:14:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 117. [2019-12-27 23:14:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 23:14:20,198 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 23:14:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:20,198 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 23:14:20,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:14:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 23:14:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:20,199 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:20,199 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:20,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:20,400 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:20,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:20,401 INFO L82 PathProgramCache]: Analyzing trace with hash -561988592, now seen corresponding path program 105 times [2019-12-27 23:14:20,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:20,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407661231] [2019-12-27 23:14:20,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:20,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407661231] [2019-12-27 23:14:20,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055205323] [2019-12-27 23:14:20,476 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 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 23:14:20,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 23:14:20,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:20,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:20,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:14:20,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:20,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:20,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [521193079] [2019-12-27 23:14:20,576 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:20,577 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:20,579 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:14:20,579 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:20,603 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:14:20,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:20,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:20,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:20,604 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 14 states. [2019-12-27 23:14:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:20,910 INFO L93 Difference]: Finished difference Result 307 states and 692 transitions. [2019-12-27 23:14:20,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:14:20,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:20,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:20,911 INFO L225 Difference]: With dead ends: 307 [2019-12-27 23:14:20,911 INFO L226 Difference]: Without dead ends: 305 [2019-12-27 23:14:20,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:14:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-12-27 23:14:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 118. [2019-12-27 23:14:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 23:14:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 288 transitions. [2019-12-27 23:14:20,915 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 288 transitions. Word has length 17 [2019-12-27 23:14:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:20,915 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 288 transitions. [2019-12-27 23:14:20,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 288 transitions. [2019-12-27 23:14:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:20,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:20,915 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:21,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:21,116 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 396655997, now seen corresponding path program 106 times [2019-12-27 23:14:21,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:21,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886510622] [2019-12-27 23:14:21,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:21,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886510622] [2019-12-27 23:14:21,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511782650] [2019-12-27 23:14:21,182 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 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 23:14:21,238 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:21,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:21,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:14:21,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 23:14:21,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:21,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 14 [2019-12-27 23:14:21,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [425367890] [2019-12-27 23:14:21,254 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:21,255 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:21,257 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 35 transitions. [2019-12-27 23:14:21,257 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:21,258 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:14:21,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:21,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:21,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:21,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 23:14:21,259 INFO L87 Difference]: Start difference. First operand 118 states and 288 transitions. Second operand 12 states. [2019-12-27 23:14:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:21,463 INFO L93 Difference]: Finished difference Result 267 states and 608 transitions. [2019-12-27 23:14:21,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 23:14:21,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:21,464 INFO L225 Difference]: With dead ends: 267 [2019-12-27 23:14:21,464 INFO L226 Difference]: Without dead ends: 265 [2019-12-27 23:14:21,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:14:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-12-27 23:14:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 118. [2019-12-27 23:14:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 23:14:21,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 288 transitions. [2019-12-27 23:14:21,467 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 288 transitions. Word has length 17 [2019-12-27 23:14:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:21,467 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 288 transitions. [2019-12-27 23:14:21,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 288 transitions. [2019-12-27 23:14:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:21,468 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:21,468 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:21,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:21,670 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:21,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1004388464, now seen corresponding path program 107 times [2019-12-27 23:14:21,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:21,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609569926] [2019-12-27 23:14:21,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:21,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609569926] [2019-12-27 23:14:21,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124356322] [2019-12-27 23:14:21,753 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 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 23:14:21,838 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:14:21,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:21,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:21,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:21,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:21,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:21,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [922819081] [2019-12-27 23:14:21,904 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:21,906 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:21,909 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 23:14:21,909 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:21,910 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:14:21,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:21,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:21,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:21,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:21,911 INFO L87 Difference]: Start difference. First operand 118 states and 288 transitions. Second operand 12 states. [2019-12-27 23:14:22,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:22,187 INFO L93 Difference]: Finished difference Result 308 states and 696 transitions. [2019-12-27 23:14:22,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:14:22,188 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:22,188 INFO L225 Difference]: With dead ends: 308 [2019-12-27 23:14:22,189 INFO L226 Difference]: Without dead ends: 306 [2019-12-27 23:14:22,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:14:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2019-12-27 23:14:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 117. [2019-12-27 23:14:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 23:14:22,192 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 23:14:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:22,192 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 23:14:22,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 23:14:22,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:22,193 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:22,193 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:22,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:22,396 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash -86049334, now seen corresponding path program 108 times [2019-12-27 23:14:22,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:22,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779992948] [2019-12-27 23:14:22,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:22,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779992948] [2019-12-27 23:14:22,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049805789] [2019-12-27 23:14:22,468 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 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 23:14:22,534 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:22,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:22,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:22,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:22,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:22,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:22,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1489818835] [2019-12-27 23:14:22,563 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:22,563 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:22,564 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:14:22,564 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:22,565 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:14:22,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:22,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:22,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:22,565 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 23:14:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:22,819 INFO L93 Difference]: Finished difference Result 313 states and 711 transitions. [2019-12-27 23:14:22,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:14:22,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:22,821 INFO L225 Difference]: With dead ends: 313 [2019-12-27 23:14:22,821 INFO L226 Difference]: Without dead ends: 311 [2019-12-27 23:14:22,821 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:14:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-12-27 23:14:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 114. [2019-12-27 23:14:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 23:14:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 273 transitions. [2019-12-27 23:14:22,824 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 273 transitions. Word has length 17 [2019-12-27 23:14:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:22,824 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 273 transitions. [2019-12-27 23:14:22,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 273 transitions. [2019-12-27 23:14:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:22,825 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:22,825 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:23,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:23,026 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:23,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1654015331, now seen corresponding path program 109 times [2019-12-27 23:14:23,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:23,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253960861] [2019-12-27 23:14:23,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:23,087 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 23:14:23,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253960861] [2019-12-27 23:14:23,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669163507] [2019-12-27 23:14:23,087 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 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 23:14:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:23,149 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:23,150 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:23,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:23,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:23,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [498867507] [2019-12-27 23:14:23,194 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:23,194 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:23,196 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:14:23,196 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:23,242 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:14:23,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:23,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:23,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:23,243 INFO L87 Difference]: Start difference. First operand 114 states and 273 transitions. Second operand 14 states. [2019-12-27 23:14:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:23,593 INFO L93 Difference]: Finished difference Result 330 states and 738 transitions. [2019-12-27 23:14:23,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:14:23,594 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:23,595 INFO L225 Difference]: With dead ends: 330 [2019-12-27 23:14:23,595 INFO L226 Difference]: Without dead ends: 328 [2019-12-27 23:14:23,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=371, Invalid=889, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:14:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-27 23:14:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 117. [2019-12-27 23:14:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 23:14:23,600 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 23:14:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:23,600 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 23:14:23,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 23:14:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:23,600 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:23,601 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:23,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:23,804 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1682307376, now seen corresponding path program 110 times [2019-12-27 23:14:23,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:23,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309655665] [2019-12-27 23:14:23,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:23,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309655665] [2019-12-27 23:14:23,863 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698951172] [2019-12-27 23:14:23,863 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 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 23:14:23,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:23,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:23,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:23,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:14:23,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:23,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:23,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [327333648] [2019-12-27 23:14:23,954 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:23,955 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:23,956 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 23:14:23,956 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:23,957 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:14:23,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:23,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:23,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:23,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:23,958 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 23:14:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:24,202 INFO L93 Difference]: Finished difference Result 316 states and 716 transitions. [2019-12-27 23:14:24,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:14:24,203 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:24,204 INFO L225 Difference]: With dead ends: 316 [2019-12-27 23:14:24,204 INFO L226 Difference]: Without dead ends: 314 [2019-12-27 23:14:24,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:14:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2019-12-27 23:14:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 116. [2019-12-27 23:14:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 23:14:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 23:14:24,208 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 23:14:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:24,208 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 23:14:24,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 23:14:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:24,208 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:24,208 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:24,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:24,409 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:24,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1211615459, now seen corresponding path program 111 times [2019-12-27 23:14:24,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:24,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191661756] [2019-12-27 23:14:24,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:24,471 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 23:14:24,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191661756] [2019-12-27 23:14:24,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703202479] [2019-12-27 23:14:24,471 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 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 23:14:24,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:14:24,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:24,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:24,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:24,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:24,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:24,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [283965755] [2019-12-27 23:14:24,571 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:24,571 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:24,572 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 23:14:24,572 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:24,573 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:14:24,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:24,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:24,573 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 23:14:24,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:24,844 INFO L93 Difference]: Finished difference Result 336 states and 759 transitions. [2019-12-27 23:14:24,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:14:24,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:24,846 INFO L225 Difference]: With dead ends: 336 [2019-12-27 23:14:24,846 INFO L226 Difference]: Without dead ends: 334 [2019-12-27 23:14:24,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:14:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2019-12-27 23:14:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 113. [2019-12-27 23:14:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-27 23:14:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 269 transitions. [2019-12-27 23:14:24,851 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 269 transitions. Word has length 17 [2019-12-27 23:14:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:24,851 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 269 transitions. [2019-12-27 23:14:24,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 269 transitions. [2019-12-27 23:14:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:24,851 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:24,852 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:25,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:25,052 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash -585343715, now seen corresponding path program 112 times [2019-12-27 23:14:25,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:25,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772108313] [2019-12-27 23:14:25,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:25,118 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 23:14:25,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772108313] [2019-12-27 23:14:25,118 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484218108] [2019-12-27 23:14:25,118 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 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 23:14:25,179 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:25,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:25,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:25,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:14:25,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:25,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:25,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [235575103] [2019-12-27 23:14:25,217 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:25,219 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:25,220 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:14:25,220 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:25,246 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:14:25,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:14:25,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:25,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:14:25,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:25,247 INFO L87 Difference]: Start difference. First operand 113 states and 269 transitions. Second operand 14 states. [2019-12-27 23:14:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:25,627 INFO L93 Difference]: Finished difference Result 340 states and 751 transitions. [2019-12-27 23:14:25,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:14:25,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-12-27 23:14:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:25,629 INFO L225 Difference]: With dead ends: 340 [2019-12-27 23:14:25,629 INFO L226 Difference]: Without dead ends: 338 [2019-12-27 23:14:25,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:14:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-12-27 23:14:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 117. [2019-12-27 23:14:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 284 transitions. [2019-12-27 23:14:25,632 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 284 transitions. Word has length 17 [2019-12-27 23:14:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:25,632 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 284 transitions. [2019-12-27 23:14:25,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:14:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 284 transitions. [2019-12-27 23:14:25,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:25,633 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:25,633 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:25,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:25,834 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash 373300874, now seen corresponding path program 113 times [2019-12-27 23:14:25,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:25,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649874419] [2019-12-27 23:14:25,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:25,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649874419] [2019-12-27 23:14:25,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569342944] [2019-12-27 23:14:25,899 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 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 23:14:25,962 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:14:25,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:25,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:25,964 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:14:25,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:25,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 15 [2019-12-27 23:14:25,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1505131647] [2019-12-27 23:14:25,987 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:25,988 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:25,989 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 31 transitions. [2019-12-27 23:14:25,989 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:25,989 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:14:25,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:25,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:25,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:25,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:14:25,990 INFO L87 Difference]: Start difference. First operand 117 states and 284 transitions. Second operand 12 states. [2019-12-27 23:14:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:26,257 INFO L93 Difference]: Finished difference Result 310 states and 686 transitions. [2019-12-27 23:14:26,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:14:26,257 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:26,258 INFO L225 Difference]: With dead ends: 310 [2019-12-27 23:14:26,258 INFO L226 Difference]: Without dead ends: 308 [2019-12-27 23:14:26,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=570, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:14:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2019-12-27 23:14:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 116. [2019-12-27 23:14:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-12-27 23:14:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 280 transitions. [2019-12-27 23:14:26,263 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 280 transitions. Word has length 17 [2019-12-27 23:14:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:26,263 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 280 transitions. [2019-12-27 23:14:26,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 280 transitions. [2019-12-27 23:14:26,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:26,264 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:26,264 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:26,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:26,467 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:26,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:26,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1027743587, now seen corresponding path program 114 times [2019-12-27 23:14:26,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:26,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777764979] [2019-12-27 23:14:26,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:26,525 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 23:14:26,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777764979] [2019-12-27 23:14:26,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891069357] [2019-12-27 23:14:26,526 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 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 23:14:26,593 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:26,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:26,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:26,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:26,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:26,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:26,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1809646920] [2019-12-27 23:14:26,629 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:26,629 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:26,630 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 23:14:26,631 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:26,631 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:14:26,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:26,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:26,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:26,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:26,631 INFO L87 Difference]: Start difference. First operand 116 states and 280 transitions. Second operand 12 states. [2019-12-27 23:14:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:26,913 INFO L93 Difference]: Finished difference Result 344 states and 763 transitions. [2019-12-27 23:14:26,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:14:26,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:26,914 INFO L225 Difference]: With dead ends: 344 [2019-12-27 23:14:26,914 INFO L226 Difference]: Without dead ends: 342 [2019-12-27 23:14:26,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:14:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-12-27 23:14:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 115. [2019-12-27 23:14:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 23:14:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2019-12-27 23:14:26,918 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 17 [2019-12-27 23:14:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:26,918 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2019-12-27 23:14:26,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2019-12-27 23:14:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 23:14:26,919 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:26,919 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:27,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:27,120 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash -109404457, now seen corresponding path program 115 times [2019-12-27 23:14:27,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:27,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88234735] [2019-12-27 23:14:27,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:27,184 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 23:14:27,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88234735] [2019-12-27 23:14:27,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204659843] [2019-12-27 23:14:27,185 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 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 23:14:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:27,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:27,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:14:27,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:27,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2019-12-27 23:14:27,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [292749823] [2019-12-27 23:14:27,277 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:27,278 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:27,279 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 27 transitions. [2019-12-27 23:14:27,279 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:27,280 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:14:27,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 23:14:27,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:27,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 23:14:27,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:27,280 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand 12 states. [2019-12-27 23:14:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:27,570 INFO L93 Difference]: Finished difference Result 339 states and 741 transitions. [2019-12-27 23:14:27,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:14:27,571 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-12-27 23:14:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:27,572 INFO L225 Difference]: With dead ends: 339 [2019-12-27 23:14:27,572 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 23:14:27,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:14:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 23:14:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 107. [2019-12-27 23:14:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-12-27 23:14:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 252 transitions. [2019-12-27 23:14:27,575 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 252 transitions. Word has length 17 [2019-12-27 23:14:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:27,576 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 252 transitions. [2019-12-27 23:14:27,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 23:14:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 252 transitions. [2019-12-27 23:14:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:27,576 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:27,576 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:27,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:27,777 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:27,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2055665343, now seen corresponding path program 116 times [2019-12-27 23:14:27,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:27,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543562409] [2019-12-27 23:14:27,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:27,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543562409] [2019-12-27 23:14:27,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229251604] [2019-12-27 23:14:27,868 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 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 23:14:27,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:27,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:27,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:14:27,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:14:27,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:27,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:14:27,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [837840238] [2019-12-27 23:14:27,976 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:27,976 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:27,978 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 23:14:27,978 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:27,979 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:27,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:27,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:27,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:27,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:27,979 INFO L87 Difference]: Start difference. First operand 107 states and 252 transitions. Second operand 13 states. [2019-12-27 23:14:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:28,411 INFO L93 Difference]: Finished difference Result 415 states and 849 transitions. [2019-12-27 23:14:28,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:14:28,411 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:28,413 INFO L225 Difference]: With dead ends: 415 [2019-12-27 23:14:28,413 INFO L226 Difference]: Without dead ends: 409 [2019-12-27 23:14:28,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=426, Invalid=1134, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:14:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2019-12-27 23:14:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 114. [2019-12-27 23:14:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-27 23:14:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 267 transitions. [2019-12-27 23:14:28,418 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 267 transitions. Word has length 18 [2019-12-27 23:14:28,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:28,418 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 267 transitions. [2019-12-27 23:14:28,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 267 transitions. [2019-12-27 23:14:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:28,419 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:28,419 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:28,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:28,622 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:28,623 INFO L82 PathProgramCache]: Analyzing trace with hash -430286399, now seen corresponding path program 117 times [2019-12-27 23:14:28,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:28,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007764679] [2019-12-27 23:14:28,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:28,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007764679] [2019-12-27 23:14:28,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96814356] [2019-12-27 23:14:28,690 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 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 23:14:28,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:14:28,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:28,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:14:28,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:14:28,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:28,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:14:28,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2070660653] [2019-12-27 23:14:28,810 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:28,811 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:28,813 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:14:28,813 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:28,841 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:28,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:14:28,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:28,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:14:28,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:28,842 INFO L87 Difference]: Start difference. First operand 114 states and 267 transitions. Second operand 15 states. [2019-12-27 23:14:29,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:29,316 INFO L93 Difference]: Finished difference Result 377 states and 800 transitions. [2019-12-27 23:14:29,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 23:14:29,316 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:14:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:29,318 INFO L225 Difference]: With dead ends: 377 [2019-12-27 23:14:29,318 INFO L226 Difference]: Without dead ends: 375 [2019-12-27 23:14:29,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 23:14:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-12-27 23:14:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 118. [2019-12-27 23:14:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 23:14:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 280 transitions. [2019-12-27 23:14:29,323 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 280 transitions. Word has length 18 [2019-12-27 23:14:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:29,323 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 280 transitions. [2019-12-27 23:14:29,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:14:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 280 transitions. [2019-12-27 23:14:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:29,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:29,324 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:29,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:29,527 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:29,527 INFO L82 PathProgramCache]: Analyzing trace with hash 528358190, now seen corresponding path program 118 times [2019-12-27 23:14:29,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:29,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020276299] [2019-12-27 23:14:29,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:29,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020276299] [2019-12-27 23:14:29,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751613167] [2019-12-27 23:14:29,604 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 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 23:14:29,662 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:29,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:29,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:29,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:14:29,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:29,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:29,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1781438790] [2019-12-27 23:14:29,696 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:29,697 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:29,699 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 23:14:29,699 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:29,699 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:29,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:29,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:29,699 INFO L87 Difference]: Start difference. First operand 118 states and 280 transitions. Second operand 13 states. [2019-12-27 23:14:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:30,076 INFO L93 Difference]: Finished difference Result 353 states and 754 transitions. [2019-12-27 23:14:30,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:14:30,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:30,077 INFO L225 Difference]: With dead ends: 353 [2019-12-27 23:14:30,078 INFO L226 Difference]: Without dead ends: 351 [2019-12-27 23:14:30,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:14:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2019-12-27 23:14:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 117. [2019-12-27 23:14:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:30,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 276 transitions. [2019-12-27 23:14:30,082 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 276 transitions. Word has length 18 [2019-12-27 23:14:30,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:30,082 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 276 transitions. [2019-12-27 23:14:30,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:30,082 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 276 transitions. [2019-12-27 23:14:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:30,082 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:30,082 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:30,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:30,283 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:30,284 INFO L82 PathProgramCache]: Analyzing trace with hash -872686271, now seen corresponding path program 119 times [2019-12-27 23:14:30,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:30,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341544510] [2019-12-27 23:14:30,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:30,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341544510] [2019-12-27 23:14:30,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702809654] [2019-12-27 23:14:30,353 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 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 23:14:30,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:14:30,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:30,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:30,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:14:30,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:30,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:30,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [954564891] [2019-12-27 23:14:30,428 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:30,429 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:30,431 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 23:14:30,431 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:30,431 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:30,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:30,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:30,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:30,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:30,432 INFO L87 Difference]: Start difference. First operand 117 states and 276 transitions. Second operand 13 states. [2019-12-27 23:14:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:30,813 INFO L93 Difference]: Finished difference Result 372 states and 795 transitions. [2019-12-27 23:14:30,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:14:30,813 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:30,814 INFO L225 Difference]: With dead ends: 372 [2019-12-27 23:14:30,814 INFO L226 Difference]: Without dead ends: 370 [2019-12-27 23:14:30,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:14:30,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-12-27 23:14:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 112. [2019-12-27 23:14:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-27 23:14:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 260 transitions. [2019-12-27 23:14:30,818 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 260 transitions. Word has length 18 [2019-12-27 23:14:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:30,818 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 260 transitions. [2019-12-27 23:14:30,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 260 transitions. [2019-12-27 23:14:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:30,819 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:30,819 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:31,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:31,020 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:31,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1809216959, now seen corresponding path program 120 times [2019-12-27 23:14:31,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:31,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717550476] [2019-12-27 23:14:31,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:31,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717550476] [2019-12-27 23:14:31,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122467215] [2019-12-27 23:14:31,103 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 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 23:14:31,168 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:31,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:31,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:31,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:14:31,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:31,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:31,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [401204861] [2019-12-27 23:14:31,194 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:31,194 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:31,197 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:14:31,197 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:31,258 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:14:31,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:14:31,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:31,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:14:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:31,259 INFO L87 Difference]: Start difference. First operand 112 states and 260 transitions. Second operand 17 states. [2019-12-27 23:14:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:31,874 INFO L93 Difference]: Finished difference Result 381 states and 824 transitions. [2019-12-27 23:14:31,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:14:31,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 23:14:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:31,876 INFO L225 Difference]: With dead ends: 381 [2019-12-27 23:14:31,876 INFO L226 Difference]: Without dead ends: 379 [2019-12-27 23:14:31,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=700, Invalid=1556, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 23:14:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-12-27 23:14:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 120. [2019-12-27 23:14:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-27 23:14:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 285 transitions. [2019-12-27 23:14:31,880 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 285 transitions. Word has length 18 [2019-12-27 23:14:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:31,880 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 285 transitions. [2019-12-27 23:14:31,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:14:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 285 transitions. [2019-12-27 23:14:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:31,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:31,880 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:32,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:32,081 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:32,082 INFO L82 PathProgramCache]: Analyzing trace with hash 325231726, now seen corresponding path program 121 times [2019-12-27 23:14:32,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:32,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118253912] [2019-12-27 23:14:32,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:32,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118253912] [2019-12-27 23:14:32,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897218207] [2019-12-27 23:14:32,152 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 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 23:14:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:32,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:14:32,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:14:32,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:32,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:14:32,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1045643617] [2019-12-27 23:14:32,259 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:32,260 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:32,262 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:14:32,263 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:32,293 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:32,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:14:32,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:32,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:14:32,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:32,294 INFO L87 Difference]: Start difference. First operand 120 states and 285 transitions. Second operand 15 states. [2019-12-27 23:14:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:32,762 INFO L93 Difference]: Finished difference Result 343 states and 750 transitions. [2019-12-27 23:14:32,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:14:32,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:14:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:32,764 INFO L225 Difference]: With dead ends: 343 [2019-12-27 23:14:32,764 INFO L226 Difference]: Without dead ends: 341 [2019-12-27 23:14:32,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:14:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2019-12-27 23:14:32,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 121. [2019-12-27 23:14:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 23:14:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-27 23:14:32,769 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 18 [2019-12-27 23:14:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:32,769 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-27 23:14:32,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:14:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-27 23:14:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:32,770 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:32,770 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:32,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:32,973 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1283876315, now seen corresponding path program 122 times [2019-12-27 23:14:32,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:32,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123388167] [2019-12-27 23:14:32,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:33,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123388167] [2019-12-27 23:14:33,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732704427] [2019-12-27 23:14:33,040 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 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 23:14:33,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:33,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:33,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:33,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 23:14:33,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:33,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:33,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1369326820] [2019-12-27 23:14:33,162 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:33,163 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:33,165 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 23:14:33,165 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:33,165 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:33,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:33,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:33,166 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 13 states. [2019-12-27 23:14:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:33,467 INFO L93 Difference]: Finished difference Result 307 states and 678 transitions. [2019-12-27 23:14:33,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:14:33,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:33,468 INFO L225 Difference]: With dead ends: 307 [2019-12-27 23:14:33,469 INFO L226 Difference]: Without dead ends: 305 [2019-12-27 23:14:33,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:14:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-12-27 23:14:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 121. [2019-12-27 23:14:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 23:14:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-27 23:14:33,472 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 18 [2019-12-27 23:14:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:33,473 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-27 23:14:33,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-27 23:14:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:33,473 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:33,473 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:33,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:33,674 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash -117168146, now seen corresponding path program 123 times [2019-12-27 23:14:33,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:33,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339649703] [2019-12-27 23:14:33,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:33,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339649703] [2019-12-27 23:14:33,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900746060] [2019-12-27 23:14:33,749 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 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 23:14:33,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:14:33,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:33,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:33,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:33,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:33,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:33,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1222508126] [2019-12-27 23:14:33,850 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:33,851 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:33,853 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:14:33,853 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:33,853 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:33,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:33,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:33,854 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 13 states. [2019-12-27 23:14:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:34,234 INFO L93 Difference]: Finished difference Result 339 states and 750 transitions. [2019-12-27 23:14:34,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:14:34,235 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:34,236 INFO L225 Difference]: With dead ends: 339 [2019-12-27 23:14:34,236 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 23:14:34,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:14:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 23:14:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 120. [2019-12-27 23:14:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-27 23:14:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 285 transitions. [2019-12-27 23:14:34,240 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 285 transitions. Word has length 18 [2019-12-27 23:14:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:34,240 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 285 transitions. [2019-12-27 23:14:34,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 285 transitions. [2019-12-27 23:14:34,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:34,240 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:34,240 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:34,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:34,441 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:34,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:34,442 INFO L82 PathProgramCache]: Analyzing trace with hash 801170984, now seen corresponding path program 124 times [2019-12-27 23:14:34,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:34,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747731049] [2019-12-27 23:14:34,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:34,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747731049] [2019-12-27 23:14:34,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934418778] [2019-12-27 23:14:34,522 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 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 23:14:34,584 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:34,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:34,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:34,586 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:34,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:34,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:34,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1973511158] [2019-12-27 23:14:34,620 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:34,621 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:34,622 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:14:34,622 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:34,622 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:34,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:34,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:34,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:34,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:34,623 INFO L87 Difference]: Start difference. First operand 120 states and 285 transitions. Second operand 13 states. [2019-12-27 23:14:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:35,010 INFO L93 Difference]: Finished difference Result 337 states and 742 transitions. [2019-12-27 23:14:35,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:14:35,010 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:35,011 INFO L225 Difference]: With dead ends: 337 [2019-12-27 23:14:35,012 INFO L226 Difference]: Without dead ends: 335 [2019-12-27 23:14:35,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:14:35,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2019-12-27 23:14:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 117. [2019-12-27 23:14:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 23:14:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 274 transitions. [2019-12-27 23:14:35,015 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 274 transitions. Word has length 18 [2019-12-27 23:14:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:35,016 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 274 transitions. [2019-12-27 23:14:35,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 274 transitions. [2019-12-27 23:14:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:35,016 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:35,016 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:35,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:35,217 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:35,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1753731647, now seen corresponding path program 125 times [2019-12-27 23:14:35,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:35,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573514899] [2019-12-27 23:14:35,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:35,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573514899] [2019-12-27 23:14:35,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973276339] [2019-12-27 23:14:35,286 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 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 23:14:35,342 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:35,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:35,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:35,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:14:35,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:35,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:35,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1400971338] [2019-12-27 23:14:35,369 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:35,370 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:35,371 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:14:35,371 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:35,404 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:35,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:14:35,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:35,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:14:35,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:35,405 INFO L87 Difference]: Start difference. First operand 117 states and 274 transitions. Second operand 15 states. [2019-12-27 23:14:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:35,863 INFO L93 Difference]: Finished difference Result 353 states and 767 transitions. [2019-12-27 23:14:35,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:14:35,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:14:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:35,865 INFO L225 Difference]: With dead ends: 353 [2019-12-27 23:14:35,866 INFO L226 Difference]: Without dead ends: 351 [2019-12-27 23:14:35,866 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=1194, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:14:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2019-12-27 23:14:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 120. [2019-12-27 23:14:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-27 23:14:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 285 transitions. [2019-12-27 23:14:35,871 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 285 transitions. Word has length 18 [2019-12-27 23:14:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:35,871 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 285 transitions. [2019-12-27 23:14:35,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:14:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 285 transitions. [2019-12-27 23:14:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:35,872 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:35,872 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:36,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:36,075 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:36,076 INFO L82 PathProgramCache]: Analyzing trace with hash -795087058, now seen corresponding path program 126 times [2019-12-27 23:14:36,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:36,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327551437] [2019-12-27 23:14:36,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:36,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327551437] [2019-12-27 23:14:36,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335227223] [2019-12-27 23:14:36,146 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 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 23:14:36,216 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:36,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:36,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:36,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:14:36,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:36,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:36,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [6292098] [2019-12-27 23:14:36,254 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:36,255 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:36,257 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 23:14:36,257 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:36,257 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:36,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:36,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:36,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:36,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:36,258 INFO L87 Difference]: Start difference. First operand 120 states and 285 transitions. Second operand 13 states. [2019-12-27 23:14:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:36,637 INFO L93 Difference]: Finished difference Result 338 states and 740 transitions. [2019-12-27 23:14:36,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:14:36,637 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:36,639 INFO L225 Difference]: With dead ends: 338 [2019-12-27 23:14:36,639 INFO L226 Difference]: Without dead ends: 336 [2019-12-27 23:14:36,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:14:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-27 23:14:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 119. [2019-12-27 23:14:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 23:14:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 281 transitions. [2019-12-27 23:14:36,643 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 281 transitions. Word has length 18 [2019-12-27 23:14:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:36,644 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 281 transitions. [2019-12-27 23:14:36,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 281 transitions. [2019-12-27 23:14:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:36,644 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:36,645 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:36,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:36,848 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:36,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2098835777, now seen corresponding path program 127 times [2019-12-27 23:14:36,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:36,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009054239] [2019-12-27 23:14:36,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:36,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009054239] [2019-12-27 23:14:36,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668269531] [2019-12-27 23:14:36,920 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 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 23:14:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:36,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:14:36,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:37,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:37,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:14:37,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [373315808] [2019-12-27 23:14:37,029 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:37,030 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:37,032 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:14:37,032 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:37,032 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:37,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:37,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:37,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:37,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:37,033 INFO L87 Difference]: Start difference. First operand 119 states and 281 transitions. Second operand 13 states. [2019-12-27 23:14:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:37,434 INFO L93 Difference]: Finished difference Result 354 states and 772 transitions. [2019-12-27 23:14:37,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:14:37,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:37,436 INFO L225 Difference]: With dead ends: 354 [2019-12-27 23:14:37,436 INFO L226 Difference]: Without dead ends: 352 [2019-12-27 23:14:37,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1075, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:14:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-12-27 23:14:37,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 110. [2019-12-27 23:14:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-12-27 23:14:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 253 transitions. [2019-12-27 23:14:37,439 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 253 transitions. Word has length 18 [2019-12-27 23:14:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:37,440 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 253 transitions. [2019-12-27 23:14:37,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 253 transitions. [2019-12-27 23:14:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:37,440 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:37,440 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:37,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:37,641 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:37,642 INFO L82 PathProgramCache]: Analyzing trace with hash 183409345, now seen corresponding path program 128 times [2019-12-27 23:14:37,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:37,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679749254] [2019-12-27 23:14:37,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:37,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679749254] [2019-12-27 23:14:37,722 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321718517] [2019-12-27 23:14:37,722 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 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 23:14:37,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:37,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:37,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:37,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:14:37,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:37,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:37,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1462430005] [2019-12-27 23:14:37,821 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:37,822 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:37,823 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:14:37,823 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:37,913 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:14:37,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 23:14:37,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:37,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 23:14:37,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:14:37,914 INFO L87 Difference]: Start difference. First operand 110 states and 253 transitions. Second operand 19 states. [2019-12-27 23:14:38,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:38,737 INFO L93 Difference]: Finished difference Result 391 states and 852 transitions. [2019-12-27 23:14:38,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-27 23:14:38,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2019-12-27 23:14:38,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:38,739 INFO L225 Difference]: With dead ends: 391 [2019-12-27 23:14:38,739 INFO L226 Difference]: Without dead ends: 389 [2019-12-27 23:14:38,740 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=895, Invalid=2075, Unknown=0, NotChecked=0, Total=2970 [2019-12-27 23:14:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-12-27 23:14:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 122. [2019-12-27 23:14:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-12-27 23:14:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 290 transitions. [2019-12-27 23:14:38,743 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 290 transitions. Word has length 18 [2019-12-27 23:14:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:38,743 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 290 transitions. [2019-12-27 23:14:38,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 23:14:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 290 transitions. [2019-12-27 23:14:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:38,744 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:38,744 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:38,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:38,948 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:38,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1605771858, now seen corresponding path program 129 times [2019-12-27 23:14:38,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:38,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815970205] [2019-12-27 23:14:38,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:39,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815970205] [2019-12-27 23:14:39,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700782255] [2019-12-27 23:14:39,017 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 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 23:14:39,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:14:39,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:39,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:39,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:14:39,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:39,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:39,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [958961554] [2019-12-27 23:14:39,129 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:39,131 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:39,133 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:14:39,133 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:39,199 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:14:39,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:14:39,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:14:39,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:14:39,200 INFO L87 Difference]: Start difference. First operand 122 states and 290 transitions. Second operand 17 states. [2019-12-27 23:14:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:39,750 INFO L93 Difference]: Finished difference Result 354 states and 779 transitions. [2019-12-27 23:14:39,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 23:14:39,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 23:14:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:39,751 INFO L225 Difference]: With dead ends: 354 [2019-12-27 23:14:39,751 INFO L226 Difference]: Without dead ends: 352 [2019-12-27 23:14:39,752 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=600, Invalid=1470, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:14:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-12-27 23:14:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 123. [2019-12-27 23:14:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 23:14:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 294 transitions. [2019-12-27 23:14:39,755 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 294 transitions. Word has length 18 [2019-12-27 23:14:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:39,755 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 294 transitions. [2019-12-27 23:14:39,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:14:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 294 transitions. [2019-12-27 23:14:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:39,755 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:39,755 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:39,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:39,956 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash 528676827, now seen corresponding path program 130 times [2019-12-27 23:14:39,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:39,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475071470] [2019-12-27 23:14:39,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:40,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475071470] [2019-12-27 23:14:40,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311691872] [2019-12-27 23:14:40,027 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 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 23:14:40,087 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:40,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:40,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:40,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 23:14:40,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:40,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:40,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [159263427] [2019-12-27 23:14:40,111 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:40,111 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:40,114 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:14:40,114 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:40,142 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:40,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:14:40,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:40,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:14:40,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:40,143 INFO L87 Difference]: Start difference. First operand 123 states and 294 transitions. Second operand 15 states. [2019-12-27 23:14:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:40,513 INFO L93 Difference]: Finished difference Result 313 states and 699 transitions. [2019-12-27 23:14:40,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:14:40,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:14:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:40,514 INFO L225 Difference]: With dead ends: 313 [2019-12-27 23:14:40,514 INFO L226 Difference]: Without dead ends: 311 [2019-12-27 23:14:40,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:14:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-12-27 23:14:40,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 125. [2019-12-27 23:14:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 23:14:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 23:14:40,518 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 18 [2019-12-27 23:14:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:40,518 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 23:14:40,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:14:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 23:14:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:40,519 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:40,519 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:40,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:40,722 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:40,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1487321416, now seen corresponding path program 131 times [2019-12-27 23:14:40,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:40,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865884960] [2019-12-27 23:14:40,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:40,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865884960] [2019-12-27 23:14:40,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997567900] [2019-12-27 23:14:40,795 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 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 23:14:40,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:14:40,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:40,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 23:14:40,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:40,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:40,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2019-12-27 23:14:40,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2038195915] [2019-12-27 23:14:40,965 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:40,966 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:40,968 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 23:14:40,969 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:40,969 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:40,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:40,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:40,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:14:40,970 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 13 states. [2019-12-27 23:14:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:41,246 INFO L93 Difference]: Finished difference Result 266 states and 600 transitions. [2019-12-27 23:14:41,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:14:41,246 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:41,247 INFO L225 Difference]: With dead ends: 266 [2019-12-27 23:14:41,247 INFO L226 Difference]: Without dead ends: 264 [2019-12-27 23:14:41,248 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:14:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-12-27 23:14:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 126. [2019-12-27 23:14:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 23:14:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 23:14:41,251 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 18 [2019-12-27 23:14:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:41,251 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 23:14:41,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:41,251 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 23:14:41,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:41,251 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:41,252 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:41,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:41,452 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash 86276955, now seen corresponding path program 132 times [2019-12-27 23:14:41,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:41,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399320843] [2019-12-27 23:14:41,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:41,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399320843] [2019-12-27 23:14:41,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904479895] [2019-12-27 23:14:41,528 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 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 23:14:41,594 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:14:41,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:41,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:41,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:14:41,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:41,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:41,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [13452529] [2019-12-27 23:14:41,629 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:41,630 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:41,631 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:14:41,631 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:41,632 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:41,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:41,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:41,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:41,632 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 13 states. [2019-12-27 23:14:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:41,942 INFO L93 Difference]: Finished difference Result 321 states and 721 transitions. [2019-12-27 23:14:41,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:14:41,942 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:41,943 INFO L225 Difference]: With dead ends: 321 [2019-12-27 23:14:41,943 INFO L226 Difference]: Without dead ends: 319 [2019-12-27 23:14:41,944 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:14:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-12-27 23:14:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 125. [2019-12-27 23:14:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 23:14:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 23:14:41,947 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 18 [2019-12-27 23:14:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:41,947 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 23:14:41,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 23:14:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:41,948 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:41,948 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:42,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:42,148 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1004616085, now seen corresponding path program 133 times [2019-12-27 23:14:42,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:42,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734949424] [2019-12-27 23:14:42,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:42,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734949424] [2019-12-27 23:14:42,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271813763] [2019-12-27 23:14:42,224 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 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 23:14:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:42,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:42,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:14:42,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:42,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:42,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [784426182] [2019-12-27 23:14:42,335 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:42,335 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:42,337 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:14:42,337 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:42,337 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:42,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:42,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:42,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:42,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:42,338 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 13 states. [2019-12-27 23:14:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:42,629 INFO L93 Difference]: Finished difference Result 323 states and 725 transitions. [2019-12-27 23:14:42,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:14:42,630 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:42,630 INFO L225 Difference]: With dead ends: 323 [2019-12-27 23:14:42,631 INFO L226 Difference]: Without dead ends: 321 [2019-12-27 23:14:42,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:14:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-12-27 23:14:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 124. [2019-12-27 23:14:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 23:14:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 23:14:42,635 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 23:14:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:42,635 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 23:14:42,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 23:14:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:42,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:42,635 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:42,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:42,836 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:42,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1550286546, now seen corresponding path program 134 times [2019-12-27 23:14:42,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:42,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116383226] [2019-12-27 23:14:42,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:42,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116383226] [2019-12-27 23:14:42,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110502225] [2019-12-27 23:14:42,907 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 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 23:14:42,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:42,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:42,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:14:42,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:43,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:43,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:14:43,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1445055136] [2019-12-27 23:14:43,013 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:43,015 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:43,016 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:14:43,016 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:43,056 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:43,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:14:43,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:43,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:14:43,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:43,057 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 15 states. [2019-12-27 23:14:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:43,457 INFO L93 Difference]: Finished difference Result 349 states and 772 transitions. [2019-12-27 23:14:43,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:14:43,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:14:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:43,458 INFO L225 Difference]: With dead ends: 349 [2019-12-27 23:14:43,458 INFO L226 Difference]: Without dead ends: 347 [2019-12-27 23:14:43,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=474, Invalid=1166, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:14:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2019-12-27 23:14:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 126. [2019-12-27 23:14:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 23:14:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 302 transitions. [2019-12-27 23:14:43,461 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 302 transitions. Word has length 18 [2019-12-27 23:14:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:43,461 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 302 transitions. [2019-12-27 23:14:43,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:14:43,462 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 302 transitions. [2019-12-27 23:14:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:43,462 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:43,462 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:43,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:43,664 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:43,664 INFO L82 PathProgramCache]: Analyzing trace with hash -591641957, now seen corresponding path program 135 times [2019-12-27 23:14:43,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:43,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183162459] [2019-12-27 23:14:43,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:43,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183162459] [2019-12-27 23:14:43,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381482254] [2019-12-27 23:14:43,746 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 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 23:14:43,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:14:43,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:43,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:43,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:14:43,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:43,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:43,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1536155908] [2019-12-27 23:14:43,836 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:43,838 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:43,840 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:14:43,840 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:43,840 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:43,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:43,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:43,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:43,841 INFO L87 Difference]: Start difference. First operand 126 states and 302 transitions. Second operand 13 states. [2019-12-27 23:14:44,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:44,138 INFO L93 Difference]: Finished difference Result 329 states and 736 transitions. [2019-12-27 23:14:44,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:14:44,138 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:44,139 INFO L225 Difference]: With dead ends: 329 [2019-12-27 23:14:44,139 INFO L226 Difference]: Without dead ends: 327 [2019-12-27 23:14:44,140 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:14:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-12-27 23:14:44,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 126. [2019-12-27 23:14:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 23:14:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 302 transitions. [2019-12-27 23:14:44,143 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 302 transitions. Word has length 18 [2019-12-27 23:14:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:44,143 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 302 transitions. [2019-12-27 23:14:44,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 302 transitions. [2019-12-27 23:14:44,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:44,144 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:44,144 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:44,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:44,344 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:44,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1992686418, now seen corresponding path program 136 times [2019-12-27 23:14:44,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:44,346 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718511973] [2019-12-27 23:14:44,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:44,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718511973] [2019-12-27 23:14:44,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875613927] [2019-12-27 23:14:44,412 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 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 23:14:44,470 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:44,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:44,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:44,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:44,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:44,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:44,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1028908752] [2019-12-27 23:14:44,503 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:44,504 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:44,506 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:14:44,507 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:44,507 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:44,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:44,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:44,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:44,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:44,508 INFO L87 Difference]: Start difference. First operand 126 states and 302 transitions. Second operand 13 states. [2019-12-27 23:14:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:44,819 INFO L93 Difference]: Finished difference Result 350 states and 781 transitions. [2019-12-27 23:14:44,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:14:44,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:44,821 INFO L225 Difference]: With dead ends: 350 [2019-12-27 23:14:44,821 INFO L226 Difference]: Without dead ends: 348 [2019-12-27 23:14:44,821 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=341, Invalid=849, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:14:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-12-27 23:14:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 123. [2019-12-27 23:14:44,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 23:14:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 291 transitions. [2019-12-27 23:14:44,824 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 291 transitions. Word has length 18 [2019-12-27 23:14:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:44,824 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 291 transitions. [2019-12-27 23:14:44,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 291 transitions. [2019-12-27 23:14:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:44,825 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:44,825 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:45,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:45,026 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash 505321704, now seen corresponding path program 137 times [2019-12-27 23:14:45,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:45,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065678793] [2019-12-27 23:14:45,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:45,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065678793] [2019-12-27 23:14:45,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445194910] [2019-12-27 23:14:45,111 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 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 23:14:45,155 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:14:45,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:45,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:14:45,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:45,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:45,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:14:45,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1124161702] [2019-12-27 23:14:45,216 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:45,217 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:45,218 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:14:45,219 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:45,265 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:45,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:14:45,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:45,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:14:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:45,267 INFO L87 Difference]: Start difference. First operand 123 states and 291 transitions. Second operand 15 states. [2019-12-27 23:14:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:45,722 INFO L93 Difference]: Finished difference Result 332 states and 733 transitions. [2019-12-27 23:14:45,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:14:45,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:14:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:45,723 INFO L225 Difference]: With dead ends: 332 [2019-12-27 23:14:45,723 INFO L226 Difference]: Without dead ends: 330 [2019-12-27 23:14:45,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1225, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:14:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2019-12-27 23:14:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 124. [2019-12-27 23:14:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 23:14:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 23:14:45,727 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 23:14:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:45,728 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 23:14:45,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:14:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 23:14:45,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:45,728 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:45,728 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:45,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:45,932 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1463966293, now seen corresponding path program 138 times [2019-12-27 23:14:45,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:45,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703095643] [2019-12-27 23:14:45,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:46,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703095643] [2019-12-27 23:14:46,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795635859] [2019-12-27 23:14:46,007 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 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 23:14:46,076 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:46,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:46,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:46,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:14:46,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:46,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:46,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [206795952] [2019-12-27 23:14:46,102 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:46,103 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:46,105 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:14:46,105 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:46,105 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:46,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:46,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:46,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:46,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:14:46,105 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 13 states. [2019-12-27 23:14:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:46,416 INFO L93 Difference]: Finished difference Result 312 states and 697 transitions. [2019-12-27 23:14:46,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:14:46,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:46,418 INFO L225 Difference]: With dead ends: 312 [2019-12-27 23:14:46,418 INFO L226 Difference]: Without dead ends: 310 [2019-12-27 23:14:46,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:14:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2019-12-27 23:14:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 124. [2019-12-27 23:14:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 23:14:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 23:14:46,421 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 23:14:46,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:46,421 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 23:14:46,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:46,421 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 23:14:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:46,422 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:46,422 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:46,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:46,623 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash 62921832, now seen corresponding path program 139 times [2019-12-27 23:14:46,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:46,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711865883] [2019-12-27 23:14:46,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:46,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711865883] [2019-12-27 23:14:46,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056080857] [2019-12-27 23:14:46,692 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 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 23:14:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:46,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:46,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:14:46,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:46,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:46,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2141749595] [2019-12-27 23:14:46,785 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:46,786 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:46,788 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:14:46,788 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:46,788 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:46,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:46,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:46,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:46,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:46,788 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 13 states. [2019-12-27 23:14:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:47,115 INFO L93 Difference]: Finished difference Result 333 states and 740 transitions. [2019-12-27 23:14:47,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:14:47,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:47,117 INFO L225 Difference]: With dead ends: 333 [2019-12-27 23:14:47,117 INFO L226 Difference]: Without dead ends: 331 [2019-12-27 23:14:47,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:14:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-27 23:14:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 123. [2019-12-27 23:14:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 23:14:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 291 transitions. [2019-12-27 23:14:47,121 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 291 transitions. Word has length 18 [2019-12-27 23:14:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:47,121 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 291 transitions. [2019-12-27 23:14:47,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 291 transitions. [2019-12-27 23:14:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:47,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:47,122 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:47,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:47,322 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash 981260962, now seen corresponding path program 140 times [2019-12-27 23:14:47,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:47,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486472843] [2019-12-27 23:14:47,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:47,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486472843] [2019-12-27 23:14:47,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974023771] [2019-12-27 23:14:47,397 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:47,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:47,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:47,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:47,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:47,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:47,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:47,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1931248821] [2019-12-27 23:14:47,501 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:47,502 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:47,503 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:14:47,504 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:47,504 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:47,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:47,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:47,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:47,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:47,504 INFO L87 Difference]: Start difference. First operand 123 states and 291 transitions. Second operand 13 states. [2019-12-27 23:14:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:47,834 INFO L93 Difference]: Finished difference Result 333 states and 740 transitions. [2019-12-27 23:14:47,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:14:47,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:47,836 INFO L225 Difference]: With dead ends: 333 [2019-12-27 23:14:47,836 INFO L226 Difference]: Without dead ends: 331 [2019-12-27 23:14:47,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:14:47,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-27 23:14:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 119. [2019-12-27 23:14:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 23:14:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 277 transitions. [2019-12-27 23:14:47,839 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 277 transitions. Word has length 18 [2019-12-27 23:14:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:47,839 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 277 transitions. [2019-12-27 23:14:47,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 277 transitions. [2019-12-27 23:14:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:47,840 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:47,840 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:48,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:48,040 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:48,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1965186625, now seen corresponding path program 141 times [2019-12-27 23:14:48,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:48,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787217082] [2019-12-27 23:14:48,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:48,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787217082] [2019-12-27 23:14:48,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38749369] [2019-12-27 23:14:48,166 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 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 23:14:48,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:14:48,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:48,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:48,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:48,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:48,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:48,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [681667513] [2019-12-27 23:14:48,260 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:48,261 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:48,262 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:14:48,262 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:48,321 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:14:48,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:14:48,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:48,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:14:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:48,323 INFO L87 Difference]: Start difference. First operand 119 states and 277 transitions. Second operand 17 states. [2019-12-27 23:14:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:48,911 INFO L93 Difference]: Finished difference Result 364 states and 784 transitions. [2019-12-27 23:14:48,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 23:14:48,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 23:14:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:48,913 INFO L225 Difference]: With dead ends: 364 [2019-12-27 23:14:48,913 INFO L226 Difference]: Without dead ends: 362 [2019-12-27 23:14:48,914 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=669, Invalid=1493, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 23:14:48,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2019-12-27 23:14:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 124. [2019-12-27 23:14:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 23:14:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 23:14:48,917 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 23:14:48,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:48,917 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 23:14:48,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:14:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 23:14:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:48,918 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:48,918 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:49,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:49,119 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:49,119 INFO L82 PathProgramCache]: Analyzing trace with hash -195331986, now seen corresponding path program 142 times [2019-12-27 23:14:49,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:49,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820177885] [2019-12-27 23:14:49,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:49,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820177885] [2019-12-27 23:14:49,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589629084] [2019-12-27 23:14:49,191 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 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 23:14:49,253 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:49,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:49,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:49,255 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:14:49,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:49,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:49,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1089186649] [2019-12-27 23:14:49,293 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:49,294 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:49,296 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:14:49,296 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:49,324 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:49,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:14:49,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:14:49,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:14:49,325 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 15 states. [2019-12-27 23:14:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:49,779 INFO L93 Difference]: Finished difference Result 345 states and 756 transitions. [2019-12-27 23:14:49,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:14:49,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:14:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:49,781 INFO L225 Difference]: With dead ends: 345 [2019-12-27 23:14:49,781 INFO L226 Difference]: Without dead ends: 343 [2019-12-27 23:14:49,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=1223, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:14:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-12-27 23:14:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 125. [2019-12-27 23:14:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 23:14:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 23:14:49,785 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 18 [2019-12-27 23:14:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:49,785 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 23:14:49,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:14:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 23:14:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:49,785 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:49,785 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:49,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:49,986 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:49,987 INFO L82 PathProgramCache]: Analyzing trace with hash 763312603, now seen corresponding path program 143 times [2019-12-27 23:14:49,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:49,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855978513] [2019-12-27 23:14:49,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:50,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855978513] [2019-12-27 23:14:50,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018011171] [2019-12-27 23:14:50,060 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 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 23:14:50,112 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:14:50,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:50,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 23:14:50,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:50,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:50,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2019-12-27 23:14:50,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [105365289] [2019-12-27 23:14:50,177 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:50,178 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:50,180 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 23:14:50,180 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:50,180 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:50,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:50,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:50,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:50,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:14:50,181 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 13 states. [2019-12-27 23:14:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:50,525 INFO L93 Difference]: Finished difference Result 318 states and 703 transitions. [2019-12-27 23:14:50,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:14:50,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:50,527 INFO L225 Difference]: With dead ends: 318 [2019-12-27 23:14:50,527 INFO L226 Difference]: Without dead ends: 316 [2019-12-27 23:14:50,527 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:14:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2019-12-27 23:14:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 125. [2019-12-27 23:14:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 23:14:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 23:14:50,531 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 18 [2019-12-27 23:14:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:50,531 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 23:14:50,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 23:14:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:50,531 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:50,531 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:50,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:50,732 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:50,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:50,733 INFO L82 PathProgramCache]: Analyzing trace with hash -637731858, now seen corresponding path program 144 times [2019-12-27 23:14:50,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:50,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001092271] [2019-12-27 23:14:50,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:50,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001092271] [2019-12-27 23:14:50,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369475405] [2019-12-27 23:14:50,802 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 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 23:14:50,870 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:50,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:50,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:50,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:14:50,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:50,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:50,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [318893314] [2019-12-27 23:14:50,905 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:50,907 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:50,908 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:14:50,908 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:50,908 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:50,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:50,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:50,909 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 13 states. [2019-12-27 23:14:51,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:51,273 INFO L93 Difference]: Finished difference Result 339 states and 749 transitions. [2019-12-27 23:14:51,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:14:51,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:51,274 INFO L225 Difference]: With dead ends: 339 [2019-12-27 23:14:51,274 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 23:14:51,275 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:14:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 23:14:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 124. [2019-12-27 23:14:51,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 23:14:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 23:14:51,279 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 23:14:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:51,279 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 23:14:51,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 23:14:51,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:51,279 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:51,279 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:51,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:51,480 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:51,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:51,481 INFO L82 PathProgramCache]: Analyzing trace with hash 280607272, now seen corresponding path program 145 times [2019-12-27 23:14:51,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:51,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380548337] [2019-12-27 23:14:51,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:51,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380548337] [2019-12-27 23:14:51,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067740579] [2019-12-27 23:14:51,551 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 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 23:14:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:51,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:51,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:14:51,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:51,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:51,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [389469657] [2019-12-27 23:14:51,654 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:51,655 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:51,657 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:14:51,658 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:51,658 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:51,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:51,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:51,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:51,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:51,659 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 13 states. [2019-12-27 23:14:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:52,348 INFO L93 Difference]: Finished difference Result 333 states and 732 transitions. [2019-12-27 23:14:52,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:14:52,349 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:52,350 INFO L225 Difference]: With dead ends: 333 [2019-12-27 23:14:52,350 INFO L226 Difference]: Without dead ends: 331 [2019-12-27 23:14:52,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:14:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2019-12-27 23:14:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 121. [2019-12-27 23:14:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 23:14:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 284 transitions. [2019-12-27 23:14:52,356 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 284 transitions. Word has length 18 [2019-12-27 23:14:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:52,356 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 284 transitions. [2019-12-27 23:14:52,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 284 transitions. [2019-12-27 23:14:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:52,357 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:52,357 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:52,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:52,558 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:52,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:52,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2020671937, now seen corresponding path program 146 times [2019-12-27 23:14:52,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:52,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866070289] [2019-12-27 23:14:52,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:52,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866070289] [2019-12-27 23:14:52,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564254111] [2019-12-27 23:14:52,687 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 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 23:14:52,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:52,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:52,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:52,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:14:52,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:52,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:52,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [773217551] [2019-12-27 23:14:52,835 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:52,836 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:52,838 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:14:52,838 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:52,875 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:14:52,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:14:52,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:14:52,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:52,876 INFO L87 Difference]: Start difference. First operand 121 states and 284 transitions. Second operand 15 states. [2019-12-27 23:14:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:53,334 INFO L93 Difference]: Finished difference Result 355 states and 773 transitions. [2019-12-27 23:14:53,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:14:53,335 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:14:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:53,336 INFO L225 Difference]: With dead ends: 355 [2019-12-27 23:14:53,336 INFO L226 Difference]: Without dead ends: 353 [2019-12-27 23:14:53,336 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=503, Invalid=1137, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:14:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-12-27 23:14:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 124. [2019-12-27 23:14:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 23:14:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 23:14:53,340 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 18 [2019-12-27 23:14:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:53,340 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 23:14:53,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:14:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 23:14:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:53,341 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:53,341 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:53,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:53,542 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:53,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1315650770, now seen corresponding path program 147 times [2019-12-27 23:14:53,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:53,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857748021] [2019-12-27 23:14:53,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:53,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857748021] [2019-12-27 23:14:53,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344248390] [2019-12-27 23:14:53,619 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 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 23:14:53,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:14:53,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:53,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:14:53,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:14:53,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:53,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:14:53,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [112754271] [2019-12-27 23:14:53,730 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:53,731 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:53,732 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:14:53,732 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:53,732 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:53,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:53,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:53,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:53,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:14:53,733 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 13 states. [2019-12-27 23:14:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:54,098 INFO L93 Difference]: Finished difference Result 338 states and 742 transitions. [2019-12-27 23:14:54,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:14:54,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:54,099 INFO L225 Difference]: With dead ends: 338 [2019-12-27 23:14:54,099 INFO L226 Difference]: Without dead ends: 336 [2019-12-27 23:14:54,100 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:14:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-27 23:14:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 123. [2019-12-27 23:14:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 23:14:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 291 transitions. [2019-12-27 23:14:54,102 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 291 transitions. Word has length 18 [2019-12-27 23:14:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:54,102 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 291 transitions. [2019-12-27 23:14:54,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 291 transitions. [2019-12-27 23:14:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:54,103 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:54,103 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:54,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:54,304 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:54,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1578272065, now seen corresponding path program 148 times [2019-12-27 23:14:54,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:54,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059623302] [2019-12-27 23:14:54,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:54,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059623302] [2019-12-27 23:14:54,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775253502] [2019-12-27 23:14:54,394 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 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 23:14:54,468 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:14:54,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:54,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:14:54,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:54,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:54,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:14:54,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [265259416] [2019-12-27 23:14:54,567 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:54,570 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:54,573 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:14:54,573 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:54,574 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:14:54,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:14:54,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:54,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:14:54,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:14:54,575 INFO L87 Difference]: Start difference. First operand 123 states and 291 transitions. Second operand 13 states. [2019-12-27 23:14:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:54,963 INFO L93 Difference]: Finished difference Result 354 states and 773 transitions. [2019-12-27 23:14:54,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:14:54,964 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:14:54,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:54,965 INFO L225 Difference]: With dead ends: 354 [2019-12-27 23:14:54,965 INFO L226 Difference]: Without dead ends: 352 [2019-12-27 23:14:54,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:14:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-12-27 23:14:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 115. [2019-12-27 23:14:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 23:14:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 267 transitions. [2019-12-27 23:14:54,968 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 267 transitions. Word has length 18 [2019-12-27 23:14:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:54,969 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 267 transitions. [2019-12-27 23:14:54,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:14:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 267 transitions. [2019-12-27 23:14:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:54,969 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:54,969 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:55,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:55,170 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash -458126527, now seen corresponding path program 149 times [2019-12-27 23:14:55,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:55,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132087539] [2019-12-27 23:14:55,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:55,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132087539] [2019-12-27 23:14:55,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392469569] [2019-12-27 23:14:55,241 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 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 23:14:55,308 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:14:55,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:55,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:14:55,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:14:55,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:55,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:14:55,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1803504637] [2019-12-27 23:14:55,344 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:55,346 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:55,347 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 23:14:55,348 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:55,499 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 23:14:55,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 23:14:55,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:55,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 23:14:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:14:55,500 INFO L87 Difference]: Start difference. First operand 115 states and 267 transitions. Second operand 21 states. [2019-12-27 23:14:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:56,553 INFO L93 Difference]: Finished difference Result 462 states and 1002 transitions. [2019-12-27 23:14:56,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-12-27 23:14:56,553 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 18 [2019-12-27 23:14:56,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:56,554 INFO L225 Difference]: With dead ends: 462 [2019-12-27 23:14:56,554 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 23:14:56,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1165, Invalid=2867, Unknown=0, NotChecked=0, Total=4032 [2019-12-27 23:14:56,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 23:14:56,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 131. [2019-12-27 23:14:56,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 23:14:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-27 23:14:56,559 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 18 [2019-12-27 23:14:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:56,559 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-27 23:14:56,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 23:14:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-27 23:14:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:56,559 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:56,559 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:56,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:56,760 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:56,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:56,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1874344210, now seen corresponding path program 150 times [2019-12-27 23:14:56,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:56,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963765447] [2019-12-27 23:14:56,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:56,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963765447] [2019-12-27 23:14:56,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884784420] [2019-12-27 23:14:56,828 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 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 23:14:56,897 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:14:56,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:56,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:14:56,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:14:56,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:56,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:14:56,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1176434724] [2019-12-27 23:14:56,942 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:56,944 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:56,946 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 23:14:56,946 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:57,135 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 23:14:57,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 23:14:57,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:57,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 23:14:57,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:14:57,137 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 19 states. [2019-12-27 23:14:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:57,910 INFO L93 Difference]: Finished difference Result 424 states and 922 transitions. [2019-12-27 23:14:57,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:14:57,910 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2019-12-27 23:14:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:57,911 INFO L225 Difference]: With dead ends: 424 [2019-12-27 23:14:57,911 INFO L226 Difference]: Without dead ends: 422 [2019-12-27 23:14:57,912 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=1895, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 23:14:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-12-27 23:14:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 131. [2019-12-27 23:14:57,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 23:14:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-27 23:14:57,915 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 18 [2019-12-27 23:14:57,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:57,915 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-27 23:14:57,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 23:14:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-27 23:14:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:57,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:57,915 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:58,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:58,116 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:58,117 INFO L82 PathProgramCache]: Analyzing trace with hash 631441883, now seen corresponding path program 151 times [2019-12-27 23:14:58,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:58,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502223750] [2019-12-27 23:14:58,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:58,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502223750] [2019-12-27 23:14:58,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409731245] [2019-12-27 23:14:58,187 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 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 23:14:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:58,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 23:14:58,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:58,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:14:58,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:58,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2019-12-27 23:14:58,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1347269563] [2019-12-27 23:14:58,310 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:58,311 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:58,313 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 23:14:58,313 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:58,424 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 23:14:58,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:14:58,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:58,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:14:58,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:14:58,425 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 17 states. [2019-12-27 23:14:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:58,923 INFO L93 Difference]: Finished difference Result 369 states and 813 transitions. [2019-12-27 23:14:58,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:14:58,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 23:14:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:58,924 INFO L225 Difference]: With dead ends: 369 [2019-12-27 23:14:58,924 INFO L226 Difference]: Without dead ends: 367 [2019-12-27 23:14:58,924 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=508, Invalid=1298, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 23:14:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-12-27 23:14:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 131. [2019-12-27 23:14:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 23:14:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 310 transitions. [2019-12-27 23:14:58,928 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 310 transitions. Word has length 18 [2019-12-27 23:14:58,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:58,928 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 310 transitions. [2019-12-27 23:14:58,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:14:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 310 transitions. [2019-12-27 23:14:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:58,929 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:58,929 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:59,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:59,129 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:59,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1529076728, now seen corresponding path program 152 times [2019-12-27 23:14:59,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:59,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120826361] [2019-12-27 23:14:59,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:14:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:14:59,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120826361] [2019-12-27 23:14:59,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036904044] [2019-12-27 23:14:59,201 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 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 23:14:59,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:14:59,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:14:59,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 23:14:59,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:14:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:14:59,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:14:59,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2019-12-27 23:14:59,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1605328934] [2019-12-27 23:14:59,369 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:14:59,370 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:14:59,372 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 44 transitions. [2019-12-27 23:14:59,372 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:14:59,427 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 23:14:59,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:14:59,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:14:59,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:14:59,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:14:59,428 INFO L87 Difference]: Start difference. First operand 131 states and 310 transitions. Second operand 15 states. [2019-12-27 23:14:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:14:59,713 INFO L93 Difference]: Finished difference Result 304 states and 680 transitions. [2019-12-27 23:14:59,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:14:59,713 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:14:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:14:59,714 INFO L225 Difference]: With dead ends: 304 [2019-12-27 23:14:59,714 INFO L226 Difference]: Without dead ends: 302 [2019-12-27 23:14:59,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:14:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-12-27 23:14:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 133. [2019-12-27 23:14:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:14:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 23:14:59,718 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 23:14:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:14:59,719 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 23:14:59,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:14:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 23:14:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:14:59,719 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:14:59,719 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:14:59,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:14:59,920 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:14:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:14:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1971476600, now seen corresponding path program 153 times [2019-12-27 23:14:59,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:14:59,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664092180] [2019-12-27 23:14:59,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:14:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:00,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664092180] [2019-12-27 23:15:00,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112928572] [2019-12-27 23:15:00,015 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:15:00,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:15:00,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:00,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:15:00,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-27 23:15:00,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:00,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 23:15:00,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [807889035] [2019-12-27 23:15:00,095 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:00,096 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:00,098 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:15:00,098 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:00,100 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:15:00,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:00,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:00,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:00,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:15:00,101 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 13 states. [2019-12-27 23:15:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:00,303 INFO L93 Difference]: Finished difference Result 312 states and 704 transitions. [2019-12-27 23:15:00,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:15:00,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:00,305 INFO L225 Difference]: With dead ends: 312 [2019-12-27 23:15:00,305 INFO L226 Difference]: Without dead ends: 310 [2019-12-27 23:15:00,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:15:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2019-12-27 23:15:00,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 133. [2019-12-27 23:15:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:15:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 23:15:00,308 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 23:15:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:00,308 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 23:15:00,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 23:15:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:00,309 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:00,309 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:00,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:00,514 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:00,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1053137470, now seen corresponding path program 154 times [2019-12-27 23:15:00,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:00,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933461393] [2019-12-27 23:15:00,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:00,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933461393] [2019-12-27 23:15:00,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993970491] [2019-12-27 23:15:00,602 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 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 23:15:00,676 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:00,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:00,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:15:00,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-12-27 23:15:00,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:00,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 23:15:00,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [250541635] [2019-12-27 23:15:00,703 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:00,704 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:00,706 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:15:00,706 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:00,707 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:15:00,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:00,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:00,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:15:00,708 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 13 states. [2019-12-27 23:15:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:00,897 INFO L93 Difference]: Finished difference Result 327 states and 743 transitions. [2019-12-27 23:15:00,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:15:00,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:00,898 INFO L225 Difference]: With dead ends: 327 [2019-12-27 23:15:00,898 INFO L226 Difference]: Without dead ends: 325 [2019-12-27 23:15:00,899 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:15:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-12-27 23:15:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 133. [2019-12-27 23:15:00,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:15:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 23:15:00,902 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 23:15:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:00,903 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 23:15:00,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 23:15:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:00,903 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:00,903 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:01,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:01,104 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:01,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:01,104 INFO L82 PathProgramCache]: Analyzing trace with hash 686927195, now seen corresponding path program 155 times [2019-12-27 23:15:01,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:01,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944067124] [2019-12-27 23:15:01,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:01,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944067124] [2019-12-27 23:15:01,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135918595] [2019-12-27 23:15:01,175 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 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 23:15:01,241 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:15:01,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:01,242 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:15:01,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:01,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:01,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 23:15:01,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [699067824] [2019-12-27 23:15:01,250 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:01,251 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:01,253 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 23:15:01,253 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:01,275 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:15:01,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:01,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:01,276 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 15 states. [2019-12-27 23:15:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:01,545 INFO L93 Difference]: Finished difference Result 377 states and 845 transitions. [2019-12-27 23:15:01,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:15:01,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:01,546 INFO L225 Difference]: With dead ends: 377 [2019-12-27 23:15:01,546 INFO L226 Difference]: Without dead ends: 375 [2019-12-27 23:15:01,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=608, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:15:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-12-27 23:15:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 135. [2019-12-27 23:15:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 23:15:01,551 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 23:15:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:01,551 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 23:15:01,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 23:15:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:01,551 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:01,551 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:01,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:01,752 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1645571784, now seen corresponding path program 156 times [2019-12-27 23:15:01,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:01,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073709562] [2019-12-27 23:15:01,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:01,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073709562] [2019-12-27 23:15:01,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741103402] [2019-12-27 23:15:01,826 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 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 23:15:01,889 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 23:15:01,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:01,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:15:01,891 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:15:01,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:01,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 23:15:01,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1435751541] [2019-12-27 23:15:01,909 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:01,910 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:01,913 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:15:01,913 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:01,914 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:15:01,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:01,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:15:01,914 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 13 states. [2019-12-27 23:15:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:02,102 INFO L93 Difference]: Finished difference Result 339 states and 767 transitions. [2019-12-27 23:15:02,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:15:02,102 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:02,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:02,103 INFO L225 Difference]: With dead ends: 339 [2019-12-27 23:15:02,103 INFO L226 Difference]: Without dead ends: 337 [2019-12-27 23:15:02,103 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:15:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-12-27 23:15:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 135. [2019-12-27 23:15:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:02,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 23:15:02,107 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 23:15:02,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:02,107 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 23:15:02,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 23:15:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:02,107 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:02,107 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:02,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:02,308 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:02,309 INFO L82 PathProgramCache]: Analyzing trace with hash 244527323, now seen corresponding path program 157 times [2019-12-27 23:15:02,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:02,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749822006] [2019-12-27 23:15:02,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:02,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749822006] [2019-12-27 23:15:02,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241861944] [2019-12-27 23:15:02,379 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 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 23:15:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:02,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:02,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:15:02,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:02,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:02,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1656579738] [2019-12-27 23:15:02,474 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:02,475 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:02,476 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:15:02,477 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:02,477 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:15:02,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:02,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:02,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:02,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:02,478 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 13 states. [2019-12-27 23:15:02,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:02,680 INFO L93 Difference]: Finished difference Result 367 states and 819 transitions. [2019-12-27 23:15:02,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:15:02,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:02,681 INFO L225 Difference]: With dead ends: 367 [2019-12-27 23:15:02,682 INFO L226 Difference]: Without dead ends: 365 [2019-12-27 23:15:02,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2019-12-27 23:15:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2019-12-27 23:15:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 133. [2019-12-27 23:15:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:15:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 23:15:02,685 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 23:15:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:02,685 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 23:15:02,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 23:15:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:02,686 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:02,686 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:02,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:02,887 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:02,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1552431851, now seen corresponding path program 158 times [2019-12-27 23:15:02,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:02,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644517210] [2019-12-27 23:15:02,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:02,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644517210] [2019-12-27 23:15:02,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214872792] [2019-12-27 23:15:02,967 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 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 23:15:03,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:03,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:03,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 23:15:03,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:15:03,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:03,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2019-12-27 23:15:03,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1483158073] [2019-12-27 23:15:03,096 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:03,097 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:03,099 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:15:03,099 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:03,134 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:15:03,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:03,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:03,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:15:03,135 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 15 states. [2019-12-27 23:15:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:03,485 INFO L93 Difference]: Finished difference Result 375 states and 847 transitions. [2019-12-27 23:15:03,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:15:03,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:03,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:03,486 INFO L225 Difference]: With dead ends: 375 [2019-12-27 23:15:03,486 INFO L226 Difference]: Without dead ends: 373 [2019-12-27 23:15:03,487 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:15:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2019-12-27 23:15:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 136. [2019-12-27 23:15:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:15:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 23:15:03,491 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 23:15:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:03,491 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 23:15:03,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 23:15:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:03,492 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:03,492 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:03,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:03,692 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:03,693 INFO L82 PathProgramCache]: Analyzing trace with hash -593787262, now seen corresponding path program 159 times [2019-12-27 23:15:03,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:03,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551710959] [2019-12-27 23:15:03,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:03,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551710959] [2019-12-27 23:15:03,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520295330] [2019-12-27 23:15:03,762 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 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 23:15:03,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:15:03,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:03,832 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:15:03,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:15:03,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:03,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 23:15:03,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1353518180] [2019-12-27 23:15:03,848 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:03,849 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:03,852 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:15:03,852 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:03,853 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:15:03,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:03,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:03,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:03,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:15:03,854 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 23:15:04,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:04,054 INFO L93 Difference]: Finished difference Result 338 states and 772 transitions. [2019-12-27 23:15:04,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:15:04,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:04,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:04,055 INFO L225 Difference]: With dead ends: 338 [2019-12-27 23:15:04,055 INFO L226 Difference]: Without dead ends: 336 [2019-12-27 23:15:04,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:15:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-12-27 23:15:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 136. [2019-12-27 23:15:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:15:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 23:15:04,059 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 23:15:04,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:04,060 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 23:15:04,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:04,060 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 23:15:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:04,060 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:04,060 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:04,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:04,261 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:04,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1994831723, now seen corresponding path program 160 times [2019-12-27 23:15:04,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:04,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644928989] [2019-12-27 23:15:04,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:04,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644928989] [2019-12-27 23:15:04,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060090007] [2019-12-27 23:15:04,330 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 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 23:15:04,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:04,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:04,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:04,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:04,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:04,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:04,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [753361310] [2019-12-27 23:15:04,419 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:04,420 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:04,422 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:15:04,422 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:04,423 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:15:04,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:04,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:04,423 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 23:15:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:04,654 INFO L93 Difference]: Finished difference Result 381 states and 867 transitions. [2019-12-27 23:15:04,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:15:04,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:04,655 INFO L225 Difference]: With dead ends: 381 [2019-12-27 23:15:04,655 INFO L226 Difference]: Without dead ends: 379 [2019-12-27 23:15:04,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:15:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-12-27 23:15:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 135. [2019-12-27 23:15:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 23:15:04,658 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 23:15:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:04,658 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 23:15:04,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:04,659 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 23:15:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:04,659 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:04,659 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:04,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:04,860 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:04,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:04,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1076492593, now seen corresponding path program 161 times [2019-12-27 23:15:04,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:04,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593841501] [2019-12-27 23:15:04,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:04,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593841501] [2019-12-27 23:15:04,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288622091] [2019-12-27 23:15:04,935 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 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 23:15:05,000 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:15:05,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:05,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:05,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:15:05,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:05,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:05,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1954186913] [2019-12-27 23:15:05,032 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:05,032 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:05,034 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:15:05,034 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:05,035 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:15:05,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:05,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:05,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:05,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:05,035 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 13 states. [2019-12-27 23:15:05,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:05,264 INFO L93 Difference]: Finished difference Result 379 states and 858 transitions. [2019-12-27 23:15:05,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 23:15:05,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:05,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:05,265 INFO L225 Difference]: With dead ends: 379 [2019-12-27 23:15:05,265 INFO L226 Difference]: Without dead ends: 377 [2019-12-27 23:15:05,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-12-27 23:15:05,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-12-27 23:15:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 133. [2019-12-27 23:15:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:15:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 23:15:05,269 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 23:15:05,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:05,270 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 23:15:05,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 23:15:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:05,270 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:05,270 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:05,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:05,474 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:05,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:05,474 INFO L82 PathProgramCache]: Analyzing trace with hash -92566930, now seen corresponding path program 162 times [2019-12-27 23:15:05,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:05,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548837675] [2019-12-27 23:15:05,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:05,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548837675] [2019-12-27 23:15:05,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736722649] [2019-12-27 23:15:05,548 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 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 23:15:05,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 23:15:05,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:05,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:05,609 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:15:05,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:05,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:15:05,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [682891807] [2019-12-27 23:15:05,664 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:05,665 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:05,666 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 23:15:05,667 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:05,761 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:15:05,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:15:05,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:05,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:15:05,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:15:05,763 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 17 states. [2019-12-27 23:15:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:06,293 INFO L93 Difference]: Finished difference Result 417 states and 924 transitions. [2019-12-27 23:15:06,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:15:06,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 23:15:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:06,294 INFO L225 Difference]: With dead ends: 417 [2019-12-27 23:15:06,295 INFO L226 Difference]: Without dead ends: 415 [2019-12-27 23:15:06,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=548, Invalid=1344, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:15:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2019-12-27 23:15:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 135. [2019-12-27 23:15:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 23:15:06,299 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 23:15:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:06,299 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 23:15:06,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:15:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 23:15:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:06,299 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:06,299 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:06,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:06,500 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2041881755, now seen corresponding path program 163 times [2019-12-27 23:15:06,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:06,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560783451] [2019-12-27 23:15:06,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:06,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560783451] [2019-12-27 23:15:06,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210348730] [2019-12-27 23:15:06,587 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 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 23:15:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:06,652 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 23:15:06,653 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:15:06,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:06,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2019-12-27 23:15:06,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [737775062] [2019-12-27 23:15:06,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:06,737 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:06,738 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:15:06,739 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:06,777 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:15:06,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:06,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:06,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:15:06,778 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 15 states. [2019-12-27 23:15:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:07,131 INFO L93 Difference]: Finished difference Result 374 states and 841 transitions. [2019-12-27 23:15:07,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:15:07,131 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:07,132 INFO L225 Difference]: With dead ends: 374 [2019-12-27 23:15:07,132 INFO L226 Difference]: Without dead ends: 372 [2019-12-27 23:15:07,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=1077, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:15:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-12-27 23:15:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 137. [2019-12-27 23:15:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 23:15:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 331 transitions. [2019-12-27 23:15:07,137 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 331 transitions. Word has length 18 [2019-12-27 23:15:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:07,137 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 331 transitions. [2019-12-27 23:15:07,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 331 transitions. [2019-12-27 23:15:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:07,137 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:07,137 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:07,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:07,338 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:07,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1294440952, now seen corresponding path program 164 times [2019-12-27 23:15:07,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:07,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244409738] [2019-12-27 23:15:07,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:07,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244409738] [2019-12-27 23:15:07,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551870536] [2019-12-27 23:15:07,433 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 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 23:15:07,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:07,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:07,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:15:07,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-12-27 23:15:07,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:07,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 23:15:07,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2038723740] [2019-12-27 23:15:07,515 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:07,516 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:07,517 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:15:07,518 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:07,518 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:07,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:07,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:07,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:07,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:15:07,519 INFO L87 Difference]: Start difference. First operand 137 states and 331 transitions. Second operand 13 states. [2019-12-27 23:15:07,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:07,710 INFO L93 Difference]: Finished difference Result 334 states and 758 transitions. [2019-12-27 23:15:07,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:15:07,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:07,711 INFO L225 Difference]: With dead ends: 334 [2019-12-27 23:15:07,711 INFO L226 Difference]: Without dead ends: 332 [2019-12-27 23:15:07,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:15:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-12-27 23:15:07,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 137. [2019-12-27 23:15:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 23:15:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 331 transitions. [2019-12-27 23:15:07,715 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 331 transitions. Word has length 18 [2019-12-27 23:15:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:07,715 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 331 transitions. [2019-12-27 23:15:07,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 331 transitions. [2019-12-27 23:15:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:07,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:07,716 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:07,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:07,918 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1599481883, now seen corresponding path program 165 times [2019-12-27 23:15:07,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:07,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114886391] [2019-12-27 23:15:07,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:07,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114886391] [2019-12-27 23:15:07,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005277185] [2019-12-27 23:15:07,992 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 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 23:15:08,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:15:08,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:08,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:08,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-27 23:15:08,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:08,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:08,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1683166893] [2019-12-27 23:15:08,089 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:08,090 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:08,092 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:15:08,092 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:08,093 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:08,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:08,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:08,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:08,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:08,093 INFO L87 Difference]: Start difference. First operand 137 states and 331 transitions. Second operand 13 states. [2019-12-27 23:15:08,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:08,344 INFO L93 Difference]: Finished difference Result 371 states and 843 transitions. [2019-12-27 23:15:08,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:15:08,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:08,345 INFO L225 Difference]: With dead ends: 371 [2019-12-27 23:15:08,346 INFO L226 Difference]: Without dead ends: 369 [2019-12-27 23:15:08,346 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:15:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2019-12-27 23:15:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 136. [2019-12-27 23:15:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:15:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 23:15:08,349 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 23:15:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:08,350 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 23:15:08,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 23:15:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:08,350 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:08,350 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:08,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:08,551 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:08,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:08,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1777146283, now seen corresponding path program 166 times [2019-12-27 23:15:08,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:08,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759724383] [2019-12-27 23:15:08,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:08,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759724383] [2019-12-27 23:15:08,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051154095] [2019-12-27 23:15:08,632 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 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 23:15:08,692 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:08,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:08,693 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:08,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:15:08,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:08,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:08,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1540942877] [2019-12-27 23:15:08,720 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:08,721 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:08,723 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:15:08,723 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:08,723 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:08,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:08,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:08,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:08,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:08,724 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 23:15:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:08,979 INFO L93 Difference]: Finished difference Result 382 states and 864 transitions. [2019-12-27 23:15:08,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:15:08,980 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:08,981 INFO L225 Difference]: With dead ends: 382 [2019-12-27 23:15:08,981 INFO L226 Difference]: Without dead ends: 380 [2019-12-27 23:15:08,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:15:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-12-27 23:15:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 135. [2019-12-27 23:15:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 323 transitions. [2019-12-27 23:15:08,985 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 323 transitions. Word has length 18 [2019-12-27 23:15:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:08,985 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 323 transitions. [2019-12-27 23:15:08,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 323 transitions. [2019-12-27 23:15:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:08,986 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:08,986 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:09,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:09,189 INFO L410 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:09,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:09,190 INFO L82 PathProgramCache]: Analyzing trace with hash -37081618, now seen corresponding path program 167 times [2019-12-27 23:15:09,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:09,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566271168] [2019-12-27 23:15:09,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:09,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566271168] [2019-12-27 23:15:09,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903290234] [2019-12-27 23:15:09,277 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 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 23:15:09,341 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:15:09,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:09,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 23:15:09,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:09,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:09,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 23:15:09,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1920803349] [2019-12-27 23:15:09,350 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:09,351 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:09,353 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:15:09,353 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:09,395 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:15:09,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:09,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:09,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:09,396 INFO L87 Difference]: Start difference. First operand 135 states and 323 transitions. Second operand 15 states. [2019-12-27 23:15:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:09,718 INFO L93 Difference]: Finished difference Result 398 states and 881 transitions. [2019-12-27 23:15:09,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:15:09,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:09,719 INFO L225 Difference]: With dead ends: 398 [2019-12-27 23:15:09,720 INFO L226 Difference]: Without dead ends: 396 [2019-12-27 23:15:09,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=745, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:15:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2019-12-27 23:15:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 137. [2019-12-27 23:15:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 23:15:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 330 transitions. [2019-12-27 23:15:09,723 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 330 transitions. Word has length 18 [2019-12-27 23:15:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:09,724 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 330 transitions. [2019-12-27 23:15:09,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 330 transitions. [2019-12-27 23:15:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:09,724 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:09,724 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:09,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:09,925 INFO L410 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash 921562971, now seen corresponding path program 168 times [2019-12-27 23:15:09,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:09,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638455784] [2019-12-27 23:15:09,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:10,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638455784] [2019-12-27 23:15:10,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258421847] [2019-12-27 23:15:10,007 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 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 23:15:10,074 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:15:10,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:10,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:10,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:15:10,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:10,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:10,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1386269872] [2019-12-27 23:15:10,102 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:10,102 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:10,104 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:15:10,104 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:10,105 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:10,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:10,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:10,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:10,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:10,105 INFO L87 Difference]: Start difference. First operand 137 states and 330 transitions. Second operand 13 states. [2019-12-27 23:15:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:10,343 INFO L93 Difference]: Finished difference Result 375 states and 835 transitions. [2019-12-27 23:15:10,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:15:10,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:10,344 INFO L225 Difference]: With dead ends: 375 [2019-12-27 23:15:10,344 INFO L226 Difference]: Without dead ends: 373 [2019-12-27 23:15:10,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:15:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2019-12-27 23:15:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 137. [2019-12-27 23:15:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 23:15:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 330 transitions. [2019-12-27 23:15:10,349 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 330 transitions. Word has length 18 [2019-12-27 23:15:10,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:10,349 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 330 transitions. [2019-12-27 23:15:10,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 330 transitions. [2019-12-27 23:15:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:10,349 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:10,349 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:10,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:10,550 INFO L410 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:10,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:10,551 INFO L82 PathProgramCache]: Analyzing trace with hash -479481490, now seen corresponding path program 169 times [2019-12-27 23:15:10,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:10,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992144248] [2019-12-27 23:15:10,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:10,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992144248] [2019-12-27 23:15:10,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738061069] [2019-12-27 23:15:10,618 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 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 23:15:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:10,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:10,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:15:10,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:10,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:10,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1094861250] [2019-12-27 23:15:10,725 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:10,726 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:10,728 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:15:10,728 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:10,729 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:10,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:10,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:10,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:10,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:10,730 INFO L87 Difference]: Start difference. First operand 137 states and 330 transitions. Second operand 13 states. [2019-12-27 23:15:10,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:10,992 INFO L93 Difference]: Finished difference Result 396 states and 871 transitions. [2019-12-27 23:15:10,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:15:10,992 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:10,993 INFO L225 Difference]: With dead ends: 396 [2019-12-27 23:15:10,993 INFO L226 Difference]: Without dead ends: 394 [2019-12-27 23:15:10,993 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:15:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2019-12-27 23:15:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 133. [2019-12-27 23:15:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:15:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 23:15:10,996 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 23:15:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:10,996 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 23:15:10,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 23:15:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:10,997 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:10,997 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:11,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:11,198 INFO L410 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:11,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:11,198 INFO L82 PathProgramCache]: Analyzing trace with hash -337994840, now seen corresponding path program 170 times [2019-12-27 23:15:11,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:11,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917233153] [2019-12-27 23:15:11,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:11,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917233153] [2019-12-27 23:15:11,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615015352] [2019-12-27 23:15:11,272 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 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 23:15:11,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:11,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:11,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:11,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:15:11,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:11,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:15:11,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [203692426] [2019-12-27 23:15:11,376 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:11,376 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:11,378 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:15:11,378 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:11,440 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:15:11,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:15:11,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:15:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:15:11,442 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 17 states. [2019-12-27 23:15:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:11,949 INFO L93 Difference]: Finished difference Result 399 states and 891 transitions. [2019-12-27 23:15:11,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:15:11,949 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 23:15:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:11,950 INFO L225 Difference]: With dead ends: 399 [2019-12-27 23:15:11,950 INFO L226 Difference]: Without dead ends: 397 [2019-12-27 23:15:11,951 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=578, Invalid=1402, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 23:15:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2019-12-27 23:15:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 134. [2019-12-27 23:15:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:11,955 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:11,955 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:11,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:15:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:11,956 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:11,956 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:12,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:12,156 INFO L410 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:12,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1796453845, now seen corresponding path program 171 times [2019-12-27 23:15:12,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:12,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438331205] [2019-12-27 23:15:12,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:12,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438331205] [2019-12-27 23:15:12,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142276603] [2019-12-27 23:15:12,229 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 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 23:15:12,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:15:12,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:12,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:12,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:15:12,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:12,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:12,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [148056446] [2019-12-27 23:15:12,328 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:12,329 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:12,331 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:15:12,331 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:12,367 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:15:12,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:12,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:12,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:12,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:12,368 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 15 states. [2019-12-27 23:15:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:12,706 INFO L93 Difference]: Finished difference Result 360 states and 816 transitions. [2019-12-27 23:15:12,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:15:12,706 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:12,707 INFO L225 Difference]: With dead ends: 360 [2019-12-27 23:15:12,707 INFO L226 Difference]: Without dead ends: 358 [2019-12-27 23:15:12,708 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=880, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:15:12,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2019-12-27 23:15:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 136. [2019-12-27 23:15:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:15:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 328 transitions. [2019-12-27 23:15:12,711 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 328 transitions. Word has length 18 [2019-12-27 23:15:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:12,712 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 328 transitions. [2019-12-27 23:15:12,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 328 transitions. [2019-12-27 23:15:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:12,712 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:12,712 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:12,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:12,913 INFO L410 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1539868862, now seen corresponding path program 172 times [2019-12-27 23:15:12,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:12,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508880670] [2019-12-27 23:15:12,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:12,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508880670] [2019-12-27 23:15:12,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418542333] [2019-12-27 23:15:12,988 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 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 23:15:13,051 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:13,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:13,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:15:13,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-27 23:15:13,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:13,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 23:15:13,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [577245932] [2019-12-27 23:15:13,071 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:13,071 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:13,073 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:15:13,073 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:13,074 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:13,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:13,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:13,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:15:13,074 INFO L87 Difference]: Start difference. First operand 136 states and 328 transitions. Second operand 13 states. [2019-12-27 23:15:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:13,258 INFO L93 Difference]: Finished difference Result 315 states and 723 transitions. [2019-12-27 23:15:13,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:15:13,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:13,260 INFO L225 Difference]: With dead ends: 315 [2019-12-27 23:15:13,260 INFO L226 Difference]: Without dead ends: 313 [2019-12-27 23:15:13,260 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:15:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-27 23:15:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 136. [2019-12-27 23:15:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:15:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 328 transitions. [2019-12-27 23:15:13,264 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 328 transitions. Word has length 18 [2019-12-27 23:15:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:13,265 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 328 transitions. [2019-12-27 23:15:13,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 328 transitions. [2019-12-27 23:15:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:13,265 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:13,265 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:13,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:13,469 INFO L410 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:13,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1354053973, now seen corresponding path program 173 times [2019-12-27 23:15:13,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:13,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996308456] [2019-12-27 23:15:13,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:13,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996308456] [2019-12-27 23:15:13,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207308828] [2019-12-27 23:15:13,538 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 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 23:15:13,601 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:15:13,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:13,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:13,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-27 23:15:13,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:13,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:13,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [737948792] [2019-12-27 23:15:13,626 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:13,627 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:13,629 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:13,629 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:13,630 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:13,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:13,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:13,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:13,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:13,630 INFO L87 Difference]: Start difference. First operand 136 states and 328 transitions. Second operand 13 states. [2019-12-27 23:15:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:13,893 INFO L93 Difference]: Finished difference Result 356 states and 817 transitions. [2019-12-27 23:15:13,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:15:13,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:13,895 INFO L225 Difference]: With dead ends: 356 [2019-12-27 23:15:13,895 INFO L226 Difference]: Without dead ends: 354 [2019-12-27 23:15:13,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:15:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-12-27 23:15:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 135. [2019-12-27 23:15:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 23:15:13,898 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 23:15:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:13,899 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 23:15:13,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 23:15:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:13,899 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:13,899 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:14,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:14,100 INFO L410 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:14,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2022574193, now seen corresponding path program 174 times [2019-12-27 23:15:14,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:14,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305327171] [2019-12-27 23:15:14,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:14,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305327171] [2019-12-27 23:15:14,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972413832] [2019-12-27 23:15:14,180 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:15:14,255 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:15:14,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:14,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:14,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-27 23:15:14,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:14,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:14,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1508651920] [2019-12-27 23:15:14,281 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:14,282 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:14,283 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:15:14,283 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:14,284 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:14,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:14,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:14,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:14,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:14,284 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 23:15:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:14,559 INFO L93 Difference]: Finished difference Result 357 states and 817 transitions. [2019-12-27 23:15:14,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:15:14,559 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:14,560 INFO L225 Difference]: With dead ends: 357 [2019-12-27 23:15:14,560 INFO L226 Difference]: Without dead ends: 355 [2019-12-27 23:15:14,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:15:14,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2019-12-27 23:15:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 134. [2019-12-27 23:15:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:14,565 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:14,565 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:14,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:14,565 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:14,565 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:14,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:14,766 INFO L410 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash -282509528, now seen corresponding path program 175 times [2019-12-27 23:15:14,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:14,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758619169] [2019-12-27 23:15:14,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:14,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758619169] [2019-12-27 23:15:14,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157437094] [2019-12-27 23:15:14,833 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 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 23:15:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:14,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:14,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:15:14,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:14,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:15:14,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [452765607] [2019-12-27 23:15:14,935 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:14,936 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:14,937 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:15:14,937 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:14,966 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:15:14,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:14,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:14,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:14,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:15:14,966 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 15 states. [2019-12-27 23:15:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:15,333 INFO L93 Difference]: Finished difference Result 390 states and 876 transitions. [2019-12-27 23:15:15,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:15:15,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:15,334 INFO L225 Difference]: With dead ends: 390 [2019-12-27 23:15:15,334 INFO L226 Difference]: Without dead ends: 388 [2019-12-27 23:15:15,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:15:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2019-12-27 23:15:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 136. [2019-12-27 23:15:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:15:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 23:15:15,339 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 23:15:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:15,339 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 23:15:15,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 23:15:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:15,339 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:15,339 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:15,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:15,540 INFO L410 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash 676135061, now seen corresponding path program 176 times [2019-12-27 23:15:15,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:15,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958674388] [2019-12-27 23:15:15,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:15,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958674388] [2019-12-27 23:15:15,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331778674] [2019-12-27 23:15:15,611 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 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 23:15:15,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:15,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:15,676 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:15,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:15,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:15,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:15,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1875673075] [2019-12-27 23:15:15,702 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:15,703 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:15,704 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:15:15,704 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:15,704 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:15,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:15,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:15,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:15,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:15,705 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 23:15:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:15,964 INFO L93 Difference]: Finished difference Result 374 states and 849 transitions. [2019-12-27 23:15:15,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:15:15,964 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:15,965 INFO L225 Difference]: With dead ends: 374 [2019-12-27 23:15:15,965 INFO L226 Difference]: Without dead ends: 372 [2019-12-27 23:15:15,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:15:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-12-27 23:15:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 136. [2019-12-27 23:15:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:15:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 327 transitions. [2019-12-27 23:15:15,970 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 327 transitions. Word has length 18 [2019-12-27 23:15:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:15,970 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 327 transitions. [2019-12-27 23:15:15,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 327 transitions. [2019-12-27 23:15:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:15,970 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:15,970 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:16,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:16,171 INFO L410 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash -724909400, now seen corresponding path program 177 times [2019-12-27 23:15:16,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:16,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506900320] [2019-12-27 23:15:16,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:16,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506900320] [2019-12-27 23:15:16,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261592091] [2019-12-27 23:15:16,266 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 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 23:15:16,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:15:16,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:16,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:16,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:15:16,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:16,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:16,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [785698105] [2019-12-27 23:15:16,367 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:16,368 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:16,370 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:16,370 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:16,370 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:16,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:16,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:16,371 INFO L87 Difference]: Start difference. First operand 136 states and 327 transitions. Second operand 13 states. [2019-12-27 23:15:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:16,659 INFO L93 Difference]: Finished difference Result 393 states and 890 transitions. [2019-12-27 23:15:16,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:15:16,660 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:16,661 INFO L225 Difference]: With dead ends: 393 [2019-12-27 23:15:16,661 INFO L226 Difference]: Without dead ends: 391 [2019-12-27 23:15:16,661 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:15:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2019-12-27 23:15:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 133. [2019-12-27 23:15:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:15:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 23:15:16,665 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 23:15:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:16,665 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 23:15:16,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:16,665 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 23:15:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:16,666 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:16,666 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:16,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:16,867 INFO L410 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:16,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1773098722, now seen corresponding path program 178 times [2019-12-27 23:15:16,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:16,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313294922] [2019-12-27 23:15:16,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:16,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313294922] [2019-12-27 23:15:16,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037718613] [2019-12-27 23:15:16,933 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 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 23:15:16,995 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:16,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:16,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:16,996 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:15:17,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:17,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:17,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [777972293] [2019-12-27 23:15:17,029 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:17,030 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:17,031 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:15:17,031 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:17,059 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:15:17,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:17,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:17,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:17,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:15:17,060 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 15 states. [2019-12-27 23:15:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:17,437 INFO L93 Difference]: Finished difference Result 395 states and 890 transitions. [2019-12-27 23:15:17,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:15:17,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:17,438 INFO L225 Difference]: With dead ends: 395 [2019-12-27 23:15:17,438 INFO L226 Difference]: Without dead ends: 393 [2019-12-27 23:15:17,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:15:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2019-12-27 23:15:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 134. [2019-12-27 23:15:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:17,442 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:17,442 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:17,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:17,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:17,442 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:17,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:17,643 INFO L410 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:17,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1563223985, now seen corresponding path program 179 times [2019-12-27 23:15:17,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:17,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811545373] [2019-12-27 23:15:17,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:17,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811545373] [2019-12-27 23:15:17,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130157299] [2019-12-27 23:15:17,715 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 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 23:15:17,778 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:15:17,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:17,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:17,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:15:17,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:17,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:17,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1966934726] [2019-12-27 23:15:17,803 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:17,804 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:17,806 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:15:17,806 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:17,806 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:17,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:17,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:17,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:17,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:17,808 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 23:15:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:18,069 INFO L93 Difference]: Finished difference Result 366 states and 833 transitions. [2019-12-27 23:15:18,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:15:18,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:18,071 INFO L225 Difference]: With dead ends: 366 [2019-12-27 23:15:18,071 INFO L226 Difference]: Without dead ends: 364 [2019-12-27 23:15:18,071 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:15:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-12-27 23:15:18,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 134. [2019-12-27 23:15:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:18,075 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:18,075 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:18,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:18,075 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:18,075 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:18,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:18,276 INFO L410 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1330698850, now seen corresponding path program 180 times [2019-12-27 23:15:18,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:18,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122217696] [2019-12-27 23:15:18,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:18,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122217696] [2019-12-27 23:15:18,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184880843] [2019-12-27 23:15:18,367 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 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 23:15:18,437 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:15:18,438 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:18,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:18,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:15:18,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:18,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:15:18,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1360707342] [2019-12-27 23:15:18,480 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:18,482 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:18,483 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:18,483 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:18,484 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:18,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:18,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:18,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:18,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:18,484 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 23:15:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:18,777 INFO L93 Difference]: Finished difference Result 394 states and 894 transitions. [2019-12-27 23:15:18,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:15:18,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:18,778 INFO L225 Difference]: With dead ends: 394 [2019-12-27 23:15:18,778 INFO L226 Difference]: Without dead ends: 392 [2019-12-27 23:15:18,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:15:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-12-27 23:15:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 133. [2019-12-27 23:15:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:15:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 23:15:18,782 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 23:15:18,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:18,783 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 23:15:18,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 23:15:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:18,783 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:18,783 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:18,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:18,984 INFO L410 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:18,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2045929316, now seen corresponding path program 181 times [2019-12-27 23:15:18,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:18,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207770233] [2019-12-27 23:15:18,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:19,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207770233] [2019-12-27 23:15:19,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572363852] [2019-12-27 23:15:19,052 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 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 23:15:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:19,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:19,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:15:19,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:19,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:19,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [355486627] [2019-12-27 23:15:19,145 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:19,145 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:19,147 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:15:19,147 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:19,147 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:19,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:19,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:19,148 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 13 states. [2019-12-27 23:15:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:19,435 INFO L93 Difference]: Finished difference Result 400 states and 901 transitions. [2019-12-27 23:15:19,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:15:19,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:19,436 INFO L225 Difference]: With dead ends: 400 [2019-12-27 23:15:19,436 INFO L226 Difference]: Without dead ends: 398 [2019-12-27 23:15:19,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:15:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2019-12-27 23:15:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 127. [2019-12-27 23:15:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 23:15:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 295 transitions. [2019-12-27 23:15:19,440 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 295 transitions. Word has length 18 [2019-12-27 23:15:19,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:19,440 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 295 transitions. [2019-12-27 23:15:19,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 295 transitions. [2019-12-27 23:15:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:19,441 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:19,441 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:19,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:19,641 INFO L410 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:19,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1862111551, now seen corresponding path program 182 times [2019-12-27 23:15:19,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:19,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229443096] [2019-12-27 23:15:19,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:19,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229443096] [2019-12-27 23:15:19,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100292945] [2019-12-27 23:15:19,709 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 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 23:15:19,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:19,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:19,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:19,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:15:19,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:19,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:19,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1561650502] [2019-12-27 23:15:19,807 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:19,807 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:19,809 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 36 transitions. [2019-12-27 23:15:19,809 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:19,898 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:15:19,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 23:15:19,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:19,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 23:15:19,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:15:19,899 INFO L87 Difference]: Start difference. First operand 127 states and 295 transitions. Second operand 19 states. [2019-12-27 23:15:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:20,661 INFO L93 Difference]: Finished difference Result 432 states and 937 transitions. [2019-12-27 23:15:20,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 23:15:20,662 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2019-12-27 23:15:20,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:20,663 INFO L225 Difference]: With dead ends: 432 [2019-12-27 23:15:20,663 INFO L226 Difference]: Without dead ends: 430 [2019-12-27 23:15:20,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=852, Invalid=2010, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 23:15:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-12-27 23:15:20,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 134. [2019-12-27 23:15:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:20,667 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:20,667 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:20,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 23:15:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:20,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:20,668 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:20,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:20,868 INFO L410 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:20,869 INFO L82 PathProgramCache]: Analyzing trace with hash 643674542, now seen corresponding path program 183 times [2019-12-27 23:15:20,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:20,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562616112] [2019-12-27 23:15:20,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:20,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562616112] [2019-12-27 23:15:20,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630032449] [2019-12-27 23:15:20,936 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 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 23:15:21,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:15:21,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:21,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:21,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:15:21,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:21,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:15:21,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [487967607] [2019-12-27 23:15:21,049 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:21,049 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:21,051 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:15:21,051 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:21,114 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:15:21,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:15:21,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:21,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:15:21,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:15:21,115 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 17 states. [2019-12-27 23:15:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:21,668 INFO L93 Difference]: Finished difference Result 409 states and 903 transitions. [2019-12-27 23:15:21,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:15:21,669 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 23:15:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:21,670 INFO L225 Difference]: With dead ends: 409 [2019-12-27 23:15:21,670 INFO L226 Difference]: Without dead ends: 407 [2019-12-27 23:15:21,670 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=609, Invalid=1461, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:15:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2019-12-27 23:15:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 135. [2019-12-27 23:15:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 23:15:21,674 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 23:15:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:21,675 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 23:15:21,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:15:21,675 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 23:15:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:21,675 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:21,675 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:21,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:21,879 INFO L410 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:21,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1516844069, now seen corresponding path program 184 times [2019-12-27 23:15:21,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:21,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233073541] [2019-12-27 23:15:21,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:21,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233073541] [2019-12-27 23:15:21,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846999356] [2019-12-27 23:15:21,984 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 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 23:15:22,042 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:22,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:22,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:22,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 23:15:22,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:22,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:22,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [206327675] [2019-12-27 23:15:22,079 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:22,080 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:22,082 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:22,082 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:22,112 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:22,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:22,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:22,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:22,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:22,113 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 15 states. [2019-12-27 23:15:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:22,466 INFO L93 Difference]: Finished difference Result 365 states and 816 transitions. [2019-12-27 23:15:22,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:15:22,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:22,467 INFO L225 Difference]: With dead ends: 365 [2019-12-27 23:15:22,467 INFO L226 Difference]: Without dead ends: 363 [2019-12-27 23:15:22,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=929, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:15:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-12-27 23:15:22,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 137. [2019-12-27 23:15:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 23:15:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 332 transitions. [2019-12-27 23:15:22,472 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 332 transitions. Word has length 18 [2019-12-27 23:15:22,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:22,472 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 332 transitions. [2019-12-27 23:15:22,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:22,472 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 332 transitions. [2019-12-27 23:15:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:22,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:22,472 INFO L411 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:22,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:22,673 INFO L410 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:22,674 INFO L82 PathProgramCache]: Analyzing trace with hash -558199480, now seen corresponding path program 185 times [2019-12-27 23:15:22,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:22,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538646300] [2019-12-27 23:15:22,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:22,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538646300] [2019-12-27 23:15:22,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777451137] [2019-12-27 23:15:22,751 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 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 23:15:22,817 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:15:22,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:22,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:15:22,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 23:15:22,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:22,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4] total 15 [2019-12-27 23:15:22,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [591690013] [2019-12-27 23:15:22,840 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:22,841 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:22,843 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 38 transitions. [2019-12-27 23:15:22,843 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:22,844 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:22,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:22,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:22,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:22,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 23:15:22,844 INFO L87 Difference]: Start difference. First operand 137 states and 332 transitions. Second operand 13 states. [2019-12-27 23:15:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:23,048 INFO L93 Difference]: Finished difference Result 313 states and 706 transitions. [2019-12-27 23:15:23,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 23:15:23,049 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:23,050 INFO L225 Difference]: With dead ends: 313 [2019-12-27 23:15:23,050 INFO L226 Difference]: Without dead ends: 311 [2019-12-27 23:15:23,050 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:15:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2019-12-27 23:15:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 137. [2019-12-27 23:15:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 23:15:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 332 transitions. [2019-12-27 23:15:23,054 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 332 transitions. Word has length 18 [2019-12-27 23:15:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:23,054 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 332 transitions. [2019-12-27 23:15:23,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:23,054 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 332 transitions. [2019-12-27 23:15:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:23,054 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:23,055 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:23,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:23,255 INFO L410 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:23,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1959243941, now seen corresponding path program 186 times [2019-12-27 23:15:23,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:23,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499425209] [2019-12-27 23:15:23,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:23,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499425209] [2019-12-27 23:15:23,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664386841] [2019-12-27 23:15:23,364 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 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 23:15:23,486 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:15:23,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:23,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:23,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:23,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:23,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:23,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [567238858] [2019-12-27 23:15:23,539 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:23,540 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:23,542 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 23:15:23,542 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:23,543 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:23,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:23,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:23,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:23,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:23,543 INFO L87 Difference]: Start difference. First operand 137 states and 332 transitions. Second operand 13 states. [2019-12-27 23:15:23,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:23,976 INFO L93 Difference]: Finished difference Result 367 states and 822 transitions. [2019-12-27 23:15:23,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:15:23,977 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:23,977 INFO L225 Difference]: With dead ends: 367 [2019-12-27 23:15:23,977 INFO L226 Difference]: Without dead ends: 365 [2019-12-27 23:15:23,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:15:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2019-12-27 23:15:23,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 136. [2019-12-27 23:15:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:15:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 328 transitions. [2019-12-27 23:15:23,983 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 328 transitions. Word has length 18 [2019-12-27 23:15:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:23,984 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 328 transitions. [2019-12-27 23:15:23,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 328 transitions. [2019-12-27 23:15:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:23,985 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:23,985 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:24,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:24,190 INFO L410 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:24,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1040904811, now seen corresponding path program 187 times [2019-12-27 23:15:24,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:24,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276656600] [2019-12-27 23:15:24,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:24,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276656600] [2019-12-27 23:15:24,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611647556] [2019-12-27 23:15:24,328 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 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 23:15:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:24,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:24,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:15:24,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:24,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:24,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1303812036] [2019-12-27 23:15:24,478 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:24,479 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:24,483 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:24,483 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:24,483 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:24,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:24,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:24,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:24,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:24,485 INFO L87 Difference]: Start difference. First operand 136 states and 328 transitions. Second operand 13 states. [2019-12-27 23:15:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:24,828 INFO L93 Difference]: Finished difference Result 376 states and 846 transitions. [2019-12-27 23:15:24,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:15:24,828 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:24,829 INFO L225 Difference]: With dead ends: 376 [2019-12-27 23:15:24,829 INFO L226 Difference]: Without dead ends: 374 [2019-12-27 23:15:24,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:15:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2019-12-27 23:15:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 135. [2019-12-27 23:15:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 23:15:24,833 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 23:15:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:24,833 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 23:15:24,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 23:15:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:24,834 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:24,834 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:25,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:25,037 INFO L410 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:25,038 INFO L82 PathProgramCache]: Analyzing trace with hash 699159854, now seen corresponding path program 188 times [2019-12-27 23:15:25,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:25,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807295113] [2019-12-27 23:15:25,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:25,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807295113] [2019-12-27 23:15:25,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258693118] [2019-12-27 23:15:25,106 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 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 23:15:25,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:25,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:25,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:25,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:15:25,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:25,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:15:25,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [709778984] [2019-12-27 23:15:25,214 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:25,215 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:25,216 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:25,216 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:25,245 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:25,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:25,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:25,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:25,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:15:25,246 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 15 states. [2019-12-27 23:15:25,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:25,639 INFO L93 Difference]: Finished difference Result 394 states and 869 transitions. [2019-12-27 23:15:25,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:15:25,640 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:25,641 INFO L225 Difference]: With dead ends: 394 [2019-12-27 23:15:25,641 INFO L226 Difference]: Without dead ends: 392 [2019-12-27 23:15:25,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:15:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-12-27 23:15:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 137. [2019-12-27 23:15:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 23:15:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 331 transitions. [2019-12-27 23:15:25,645 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 331 transitions. Word has length 18 [2019-12-27 23:15:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:25,645 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 331 transitions. [2019-12-27 23:15:25,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 331 transitions. [2019-12-27 23:15:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:25,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:25,646 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:25,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:25,847 INFO L410 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:25,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1657804443, now seen corresponding path program 189 times [2019-12-27 23:15:25,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:25,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967821043] [2019-12-27 23:15:25,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:25,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967821043] [2019-12-27 23:15:25,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730139873] [2019-12-27 23:15:25,917 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:25,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:15:25,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:25,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:25,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:26,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:26,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:26,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1403460542] [2019-12-27 23:15:26,014 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:26,014 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:26,017 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:15:26,017 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:26,017 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:26,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:26,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:26,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:26,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:26,018 INFO L87 Difference]: Start difference. First operand 137 states and 331 transitions. Second operand 13 states. [2019-12-27 23:15:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:26,315 INFO L93 Difference]: Finished difference Result 377 states and 839 transitions. [2019-12-27 23:15:26,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:15:26,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:26,316 INFO L225 Difference]: With dead ends: 377 [2019-12-27 23:15:26,316 INFO L226 Difference]: Without dead ends: 375 [2019-12-27 23:15:26,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:15:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-12-27 23:15:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 137. [2019-12-27 23:15:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 23:15:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 331 transitions. [2019-12-27 23:15:26,320 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 331 transitions. Word has length 18 [2019-12-27 23:15:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:26,320 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 331 transitions. [2019-12-27 23:15:26,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 331 transitions. [2019-12-27 23:15:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:26,320 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:26,320 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:26,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:26,524 INFO L410 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:26,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:26,525 INFO L82 PathProgramCache]: Analyzing trace with hash 256759982, now seen corresponding path program 190 times [2019-12-27 23:15:26,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:26,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475280092] [2019-12-27 23:15:26,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:26,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475280092] [2019-12-27 23:15:26,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584394113] [2019-12-27 23:15:26,606 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:26,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:26,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:26,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:26,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:15:26,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:26,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:26,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1784322389] [2019-12-27 23:15:26,701 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:26,701 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:26,703 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 23:15:26,703 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:26,703 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:26,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:26,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:26,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:26,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:26,704 INFO L87 Difference]: Start difference. First operand 137 states and 331 transitions. Second operand 13 states. [2019-12-27 23:15:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:26,998 INFO L93 Difference]: Finished difference Result 393 states and 870 transitions. [2019-12-27 23:15:26,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:15:26,999 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:27,000 INFO L225 Difference]: With dead ends: 393 [2019-12-27 23:15:27,000 INFO L226 Difference]: Without dead ends: 391 [2019-12-27 23:15:27,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=803, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:15:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2019-12-27 23:15:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 134. [2019-12-27 23:15:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:27,004 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:27,005 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:27,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:27,005 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:27,006 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:27,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:27,209 INFO L410 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:27,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1540199192, now seen corresponding path program 191 times [2019-12-27 23:15:27,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:27,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283675865] [2019-12-27 23:15:27,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:27,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283675865] [2019-12-27 23:15:27,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778335640] [2019-12-27 23:15:27,303 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:27,362 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:15:27,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:27,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:27,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:15:27,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:27,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:15:27,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1970114787] [2019-12-27 23:15:27,407 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:27,408 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:27,410 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:27,410 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:27,439 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:27,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:27,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:15:27,440 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 15 states. [2019-12-27 23:15:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:27,856 INFO L93 Difference]: Finished difference Result 392 states and 869 transitions. [2019-12-27 23:15:27,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:15:27,857 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:27,858 INFO L225 Difference]: With dead ends: 392 [2019-12-27 23:15:27,858 INFO L226 Difference]: Without dead ends: 390 [2019-12-27 23:15:27,858 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:15:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2019-12-27 23:15:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 135. [2019-12-27 23:15:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 23:15:27,861 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 23:15:27,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:27,861 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 23:15:27,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:27,862 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 23:15:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:27,862 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:27,862 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:28,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:28,063 INFO L410 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:28,063 INFO L82 PathProgramCache]: Analyzing trace with hash -581554603, now seen corresponding path program 192 times [2019-12-27 23:15:28,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:28,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800020894] [2019-12-27 23:15:28,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:28,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800020894] [2019-12-27 23:15:28,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409539705] [2019-12-27 23:15:28,136 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:28,207 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:15:28,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:28,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:28,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:15:28,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:28,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:28,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1532960396] [2019-12-27 23:15:28,232 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:28,233 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:28,234 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:15:28,235 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:28,235 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:28,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:28,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:28,236 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 23:15:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:28,532 INFO L93 Difference]: Finished difference Result 370 states and 829 transitions. [2019-12-27 23:15:28,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:15:28,533 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:28,533 INFO L225 Difference]: With dead ends: 370 [2019-12-27 23:15:28,534 INFO L226 Difference]: Without dead ends: 368 [2019-12-27 23:15:28,534 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:15:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2019-12-27 23:15:28,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 135. [2019-12-27 23:15:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 23:15:28,538 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 23:15:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:28,538 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 23:15:28,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:28,538 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 23:15:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:28,538 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:28,538 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:28,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:28,740 INFO L410 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:28,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1982599064, now seen corresponding path program 193 times [2019-12-27 23:15:28,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:28,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262529576] [2019-12-27 23:15:28,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:28,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262529576] [2019-12-27 23:15:28,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230380127] [2019-12-27 23:15:28,808 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:28,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:28,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:15:28,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:28,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:28,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [24285185] [2019-12-27 23:15:28,901 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:28,901 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:28,903 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 23:15:28,903 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:28,903 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:28,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:28,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:28,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:28,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:28,904 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 23:15:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:29,230 INFO L93 Difference]: Finished difference Result 387 states and 863 transitions. [2019-12-27 23:15:29,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:15:29,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:29,231 INFO L225 Difference]: With dead ends: 387 [2019-12-27 23:15:29,231 INFO L226 Difference]: Without dead ends: 385 [2019-12-27 23:15:29,232 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=337, Invalid=853, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:15:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2019-12-27 23:15:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 134. [2019-12-27 23:15:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:29,235 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:29,235 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:29,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:29,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:29,235 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:29,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:29,436 INFO L410 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1064259934, now seen corresponding path program 194 times [2019-12-27 23:15:29,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:29,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256418584] [2019-12-27 23:15:29,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:29,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256418584] [2019-12-27 23:15:29,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974011535] [2019-12-27 23:15:29,504 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:29,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:29,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:29,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:29,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:15:29,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:29,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:29,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [957311367] [2019-12-27 23:15:29,606 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:29,607 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:29,608 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:29,608 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:29,609 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:29,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:29,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:29,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:29,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:29,609 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 23:15:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:29,921 INFO L93 Difference]: Finished difference Result 389 states and 868 transitions. [2019-12-27 23:15:29,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:15:29,922 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:29,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:29,923 INFO L225 Difference]: With dead ends: 389 [2019-12-27 23:15:29,923 INFO L226 Difference]: Without dead ends: 387 [2019-12-27 23:15:29,923 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=337, Invalid=853, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:15:29,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2019-12-27 23:15:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 129. [2019-12-27 23:15:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 23:15:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 302 transitions. [2019-12-27 23:15:29,927 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 302 transitions. Word has length 18 [2019-12-27 23:15:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:29,927 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 302 transitions. [2019-12-27 23:15:29,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 302 transitions. [2019-12-27 23:15:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:29,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:29,928 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:30,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:30,129 INFO L410 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash -80334271, now seen corresponding path program 195 times [2019-12-27 23:15:30,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:30,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807003917] [2019-12-27 23:15:30,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:30,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807003917] [2019-12-27 23:15:30,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392904358] [2019-12-27 23:15:30,196 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:30,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 23:15:30,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:30,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:30,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:15:30,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:30,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:30,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1561969315] [2019-12-27 23:15:30,283 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:30,284 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:30,285 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 32 transitions. [2019-12-27 23:15:30,285 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:30,355 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:15:30,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:15:30,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:30,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:15:30,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:15:30,356 INFO L87 Difference]: Start difference. First operand 129 states and 302 transitions. Second operand 17 states. [2019-12-27 23:15:30,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:30,920 INFO L93 Difference]: Finished difference Result 412 states and 897 transitions. [2019-12-27 23:15:30,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:15:30,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-12-27 23:15:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:30,922 INFO L225 Difference]: With dead ends: 412 [2019-12-27 23:15:30,922 INFO L226 Difference]: Without dead ends: 410 [2019-12-27 23:15:30,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=634, Invalid=1436, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:15:30,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2019-12-27 23:15:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 134. [2019-12-27 23:15:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:30,926 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:30,926 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:30,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:15:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:30,927 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:30,927 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:31,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:31,127 INFO L410 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:31,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2054114414, now seen corresponding path program 196 times [2019-12-27 23:15:31,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:31,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288624772] [2019-12-27 23:15:31,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:31,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288624772] [2019-12-27 23:15:31,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652291251] [2019-12-27 23:15:31,195 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:31,256 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:31,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:31,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:31,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:15:31,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:31,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:31,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1721212140] [2019-12-27 23:15:31,291 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:31,291 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:31,292 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:31,293 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:31,321 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:31,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:31,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:31,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:15:31,322 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 15 states. [2019-12-27 23:15:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:31,732 INFO L93 Difference]: Finished difference Result 385 states and 848 transitions. [2019-12-27 23:15:31,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:15:31,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:31,733 INFO L225 Difference]: With dead ends: 385 [2019-12-27 23:15:31,733 INFO L226 Difference]: Without dead ends: 383 [2019-12-27 23:15:31,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=471, Invalid=1169, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:15:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2019-12-27 23:15:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 135. [2019-12-27 23:15:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 23:15:31,737 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 23:15:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:31,737 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 23:15:31,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 23:15:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:31,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:31,737 INFO L411 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:31,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:31,938 INFO L410 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1282208293, now seen corresponding path program 197 times [2019-12-27 23:15:31,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:31,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473176266] [2019-12-27 23:15:31,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:32,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473176266] [2019-12-27 23:15:32,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969699163] [2019-12-27 23:15:32,007 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:32,068 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:15:32,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:32,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:32,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 23:15:32,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:32,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:32,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [203087919] [2019-12-27 23:15:32,095 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:32,095 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:32,097 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 34 transitions. [2019-12-27 23:15:32,097 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:32,097 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:32,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:32,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:32,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:32,098 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 23:15:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:32,385 INFO L93 Difference]: Finished difference Result 350 states and 775 transitions. [2019-12-27 23:15:32,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:15:32,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:32,387 INFO L225 Difference]: With dead ends: 350 [2019-12-27 23:15:32,387 INFO L226 Difference]: Without dead ends: 348 [2019-12-27 23:15:32,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:15:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-12-27 23:15:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 135. [2019-12-27 23:15:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:32,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 324 transitions. [2019-12-27 23:15:32,390 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 324 transitions. Word has length 18 [2019-12-27 23:15:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:32,391 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 324 transitions. [2019-12-27 23:15:32,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:32,391 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 324 transitions. [2019-12-27 23:15:32,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:32,391 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:32,392 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:32,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:32,592 INFO L410 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1611714542, now seen corresponding path program 198 times [2019-12-27 23:15:32,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:32,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677125006] [2019-12-27 23:15:32,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:32,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677125006] [2019-12-27 23:15:32,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119651643] [2019-12-27 23:15:32,661 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:32,725 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:15:32,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:32,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:32,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:15:32,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:32,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:32,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [506671504] [2019-12-27 23:15:32,758 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:32,759 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:32,760 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 23:15:32,760 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:32,760 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:32,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:32,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:32,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:32,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:32,761 INFO L87 Difference]: Start difference. First operand 135 states and 324 transitions. Second operand 13 states. [2019-12-27 23:15:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:33,092 INFO L93 Difference]: Finished difference Result 386 states and 851 transitions. [2019-12-27 23:15:33,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:15:33,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:33,093 INFO L225 Difference]: With dead ends: 386 [2019-12-27 23:15:33,094 INFO L226 Difference]: Without dead ends: 384 [2019-12-27 23:15:33,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:15:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2019-12-27 23:15:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 134. [2019-12-27 23:15:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:33,098 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:33,098 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:33,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:33,098 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:33,099 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:33,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:33,299 INFO L410 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1764913624, now seen corresponding path program 199 times [2019-12-27 23:15:33,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:33,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129462793] [2019-12-27 23:15:33,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:33,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129462793] [2019-12-27 23:15:33,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253973598] [2019-12-27 23:15:33,368 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:33,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:33,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:15:33,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:33,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2019-12-27 23:15:33,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1796148013] [2019-12-27 23:15:33,461 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:33,462 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:33,463 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:33,463 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:33,463 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:33,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:33,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:33,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:33,464 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 23:15:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:33,784 INFO L93 Difference]: Finished difference Result 390 states and 863 transitions. [2019-12-27 23:15:33,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:15:33,784 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:33,785 INFO L225 Difference]: With dead ends: 390 [2019-12-27 23:15:33,786 INFO L226 Difference]: Without dead ends: 388 [2019-12-27 23:15:33,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:15:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2019-12-27 23:15:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 131. [2019-12-27 23:15:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 23:15:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 309 transitions. [2019-12-27 23:15:33,790 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 309 transitions. Word has length 18 [2019-12-27 23:15:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:33,790 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 309 transitions. [2019-12-27 23:15:33,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 309 transitions. [2019-12-27 23:15:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:33,790 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:33,790 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:33,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:33,991 INFO L410 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:33,991 INFO L82 PathProgramCache]: Analyzing trace with hash -24848959, now seen corresponding path program 200 times [2019-12-27 23:15:33,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:33,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290890365] [2019-12-27 23:15:33,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:34,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290890365] [2019-12-27 23:15:34,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90725739] [2019-12-27 23:15:34,061 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:34,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:34,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:34,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:34,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:34,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:34,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2019-12-27 23:15:34,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1217821603] [2019-12-27 23:15:34,151 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:34,152 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:34,153 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 28 transitions. [2019-12-27 23:15:34,153 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:34,183 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:15:34,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:15:34,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:34,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:15:34,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:34,184 INFO L87 Difference]: Start difference. First operand 131 states and 309 transitions. Second operand 15 states. [2019-12-27 23:15:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:34,590 INFO L93 Difference]: Finished difference Result 405 states and 880 transitions. [2019-12-27 23:15:34,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:15:34,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-12-27 23:15:34,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:34,591 INFO L225 Difference]: With dead ends: 405 [2019-12-27 23:15:34,591 INFO L226 Difference]: Without dead ends: 403 [2019-12-27 23:15:34,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=474, Invalid=1086, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:15:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2019-12-27 23:15:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 134. [2019-12-27 23:15:34,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 320 transitions. [2019-12-27 23:15:34,595 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 320 transitions. Word has length 18 [2019-12-27 23:15:34,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:34,595 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 320 transitions. [2019-12-27 23:15:34,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:15:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 320 transitions. [2019-12-27 23:15:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:34,595 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:34,595 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:34,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:34,796 INFO L410 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash 933795630, now seen corresponding path program 201 times [2019-12-27 23:15:34,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:34,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685678264] [2019-12-27 23:15:34,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:34,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685678264] [2019-12-27 23:15:34,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031134857] [2019-12-27 23:15:34,862 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:34,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:15:34,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:34,926 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:34,926 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:15:34,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:34,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:15:34,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [8888016] [2019-12-27 23:15:34,973 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:34,974 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:34,975 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 23:15:34,975 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:34,976 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:34,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:34,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:34,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:34,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:34,976 INFO L87 Difference]: Start difference. First operand 134 states and 320 transitions. Second operand 13 states. [2019-12-27 23:15:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:35,309 INFO L93 Difference]: Finished difference Result 388 states and 846 transitions. [2019-12-27 23:15:35,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:15:35,309 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:35,310 INFO L225 Difference]: With dead ends: 388 [2019-12-27 23:15:35,310 INFO L226 Difference]: Without dead ends: 386 [2019-12-27 23:15:35,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:15:35,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2019-12-27 23:15:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 133. [2019-12-27 23:15:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:15:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 316 transitions. [2019-12-27 23:15:35,313 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 316 transitions. Word has length 18 [2019-12-27 23:15:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:35,313 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 316 transitions. [2019-12-27 23:15:35,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 316 transitions. [2019-12-27 23:15:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 23:15:35,314 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:35,314 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:35,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:35,514 INFO L410 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash -467248831, now seen corresponding path program 202 times [2019-12-27 23:15:35,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:35,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639300736] [2019-12-27 23:15:35,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:35,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639300736] [2019-12-27 23:15:35,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282220993] [2019-12-27 23:15:35,583 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:35,640 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:35,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:35,641 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:35,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:15:35,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:35,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2019-12-27 23:15:35,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [945971501] [2019-12-27 23:15:35,683 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:35,684 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:35,685 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 23:15:35,685 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:35,685 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:15:35,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 23:15:35,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:35,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 23:15:35,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:35,686 INFO L87 Difference]: Start difference. First operand 133 states and 316 transitions. Second operand 13 states. [2019-12-27 23:15:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:36,021 INFO L93 Difference]: Finished difference Result 404 states and 879 transitions. [2019-12-27 23:15:36,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:15:36,021 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-12-27 23:15:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:36,022 INFO L225 Difference]: With dead ends: 404 [2019-12-27 23:15:36,022 INFO L226 Difference]: Without dead ends: 402 [2019-12-27 23:15:36,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=361, Invalid=971, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:15:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2019-12-27 23:15:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 122. [2019-12-27 23:15:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-12-27 23:15:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 283 transitions. [2019-12-27 23:15:36,026 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 283 transitions. Word has length 18 [2019-12-27 23:15:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:36,026 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 283 transitions. [2019-12-27 23:15:36,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 23:15:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 283 transitions. [2019-12-27 23:15:36,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:36,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:36,026 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:36,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:36,227 INFO L410 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:36,227 INFO L82 PathProgramCache]: Analyzing trace with hash 729250308, now seen corresponding path program 203 times [2019-12-27 23:15:36,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:36,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887952594] [2019-12-27 23:15:36,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:36,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887952594] [2019-12-27 23:15:36,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660449170] [2019-12-27 23:15:36,320 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:36,375 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:15:36,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:36,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:36,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 23:15:36,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:36,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:36,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1145540580] [2019-12-27 23:15:36,409 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:36,410 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:36,412 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 23:15:36,412 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:36,412 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:36,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:36,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:36,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:36,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:36,413 INFO L87 Difference]: Start difference. First operand 122 states and 283 transitions. Second operand 14 states. [2019-12-27 23:15:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:36,887 INFO L93 Difference]: Finished difference Result 473 states and 985 transitions. [2019-12-27 23:15:36,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:15:36,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:36,889 INFO L225 Difference]: With dead ends: 473 [2019-12-27 23:15:36,889 INFO L226 Difference]: Without dead ends: 471 [2019-12-27 23:15:36,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:15:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-12-27 23:15:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 124. [2019-12-27 23:15:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 23:15:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 290 transitions. [2019-12-27 23:15:36,893 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 290 transitions. Word has length 19 [2019-12-27 23:15:36,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:36,893 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 290 transitions. [2019-12-27 23:15:36,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:36,893 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 290 transitions. [2019-12-27 23:15:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:36,893 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:36,893 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:37,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:37,096 INFO L410 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1729043382, now seen corresponding path program 204 times [2019-12-27 23:15:37,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:37,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419496544] [2019-12-27 23:15:37,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:37,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419496544] [2019-12-27 23:15:37,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037396638] [2019-12-27 23:15:37,175 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:37,247 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 23:15:37,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:37,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:37,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:37,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:37,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:37,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1739309193] [2019-12-27 23:15:37,286 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:37,287 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:37,289 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 23:15:37,289 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:37,326 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:37,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:15:37,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:15:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:15:37,328 INFO L87 Difference]: Start difference. First operand 124 states and 290 transitions. Second operand 16 states. [2019-12-27 23:15:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:37,873 INFO L93 Difference]: Finished difference Result 449 states and 950 transitions. [2019-12-27 23:15:37,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 23:15:37,874 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:15:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:37,875 INFO L225 Difference]: With dead ends: 449 [2019-12-27 23:15:37,875 INFO L226 Difference]: Without dead ends: 447 [2019-12-27 23:15:37,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=696, Invalid=1656, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 23:15:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-12-27 23:15:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 128. [2019-12-27 23:15:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 23:15:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 305 transitions. [2019-12-27 23:15:37,879 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 305 transitions. Word has length 19 [2019-12-27 23:15:37,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:37,880 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 305 transitions. [2019-12-27 23:15:37,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:15:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 305 transitions. [2019-12-27 23:15:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:37,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:37,880 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:38,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:38,081 INFO L410 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:38,082 INFO L82 PathProgramCache]: Analyzing trace with hash -770398793, now seen corresponding path program 205 times [2019-12-27 23:15:38,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:38,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640882431] [2019-12-27 23:15:38,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:38,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640882431] [2019-12-27 23:15:38,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050987014] [2019-12-27 23:15:38,167 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:38,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:38,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 23:15:38,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:38,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:38,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1244506070] [2019-12-27 23:15:38,263 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:38,264 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:38,266 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 23:15:38,266 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:38,266 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:38,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:38,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:38,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:38,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:38,267 INFO L87 Difference]: Start difference. First operand 128 states and 305 transitions. Second operand 14 states. [2019-12-27 23:15:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:38,729 INFO L93 Difference]: Finished difference Result 423 states and 894 transitions. [2019-12-27 23:15:38,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:15:38,730 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:38,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:38,731 INFO L225 Difference]: With dead ends: 423 [2019-12-27 23:15:38,731 INFO L226 Difference]: Without dead ends: 421 [2019-12-27 23:15:38,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:15:38,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-12-27 23:15:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 127. [2019-12-27 23:15:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 23:15:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 301 transitions. [2019-12-27 23:15:38,735 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 301 transitions. Word has length 19 [2019-12-27 23:15:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:38,735 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 301 transitions. [2019-12-27 23:15:38,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 301 transitions. [2019-12-27 23:15:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:38,735 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:38,735 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:38,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:38,936 INFO L410 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2123524042, now seen corresponding path program 206 times [2019-12-27 23:15:38,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:38,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286301550] [2019-12-27 23:15:38,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:39,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286301550] [2019-12-27 23:15:39,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708552383] [2019-12-27 23:15:39,017 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:39,081 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:39,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:39,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:39,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:15:39,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:39,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:15:39,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [165085578] [2019-12-27 23:15:39,128 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:39,129 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:39,131 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:15:39,131 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:39,131 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:39,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:39,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:15:39,132 INFO L87 Difference]: Start difference. First operand 127 states and 301 transitions. Second operand 14 states. [2019-12-27 23:15:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:39,610 INFO L93 Difference]: Finished difference Result 448 states and 954 transitions. [2019-12-27 23:15:39,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:15:39,610 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:39,611 INFO L225 Difference]: With dead ends: 448 [2019-12-27 23:15:39,611 INFO L226 Difference]: Without dead ends: 446 [2019-12-27 23:15:39,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=545, Invalid=1435, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 23:15:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2019-12-27 23:15:39,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 126. [2019-12-27 23:15:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 23:15:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 297 transitions. [2019-12-27 23:15:39,614 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 297 transitions. Word has length 19 [2019-12-27 23:15:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:39,614 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 297 transitions. [2019-12-27 23:15:39,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 297 transitions. [2019-12-27 23:15:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:39,615 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:39,615 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:39,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:39,816 INFO L410 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:39,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1253104124, now seen corresponding path program 207 times [2019-12-27 23:15:39,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:39,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026047734] [2019-12-27 23:15:39,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:39,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026047734] [2019-12-27 23:15:39,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411618429] [2019-12-27 23:15:39,906 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:39,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:15:39,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:39,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:39,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:15:40,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:40,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:40,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1796827696] [2019-12-27 23:15:40,008 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:40,008 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:40,010 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 23:15:40,010 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:40,011 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:40,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:40,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:40,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:40,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:40,011 INFO L87 Difference]: Start difference. First operand 126 states and 297 transitions. Second operand 14 states. [2019-12-27 23:15:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:40,478 INFO L93 Difference]: Finished difference Result 457 states and 968 transitions. [2019-12-27 23:15:40,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:15:40,479 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:40,480 INFO L225 Difference]: With dead ends: 457 [2019-12-27 23:15:40,480 INFO L226 Difference]: Without dead ends: 455 [2019-12-27 23:15:40,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:15:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-12-27 23:15:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 128. [2019-12-27 23:15:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 23:15:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 302 transitions. [2019-12-27 23:15:40,484 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 302 transitions. Word has length 19 [2019-12-27 23:15:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:40,484 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 302 transitions. [2019-12-27 23:15:40,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 302 transitions. [2019-12-27 23:15:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:40,484 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:40,485 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:40,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:40,685 INFO L410 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:40,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1917266672, now seen corresponding path program 208 times [2019-12-27 23:15:40,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:40,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577182065] [2019-12-27 23:15:40,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:40,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577182065] [2019-12-27 23:15:40,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97366960] [2019-12-27 23:15:40,779 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:40,841 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:40,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:40,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:40,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:15:40,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:40,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:15:40,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1326578836] [2019-12-27 23:15:40,888 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:40,889 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:40,891 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 23:15:40,891 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:40,952 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:15:40,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:15:40,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:40,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:15:40,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:15:40,953 INFO L87 Difference]: Start difference. First operand 128 states and 302 transitions. Second operand 18 states. [2019-12-27 23:15:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:41,641 INFO L93 Difference]: Finished difference Result 454 states and 977 transitions. [2019-12-27 23:15:41,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 23:15:41,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:15:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:41,642 INFO L225 Difference]: With dead ends: 454 [2019-12-27 23:15:41,643 INFO L226 Difference]: Without dead ends: 452 [2019-12-27 23:15:41,643 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=818, Invalid=2044, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 23:15:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-12-27 23:15:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 134. [2019-12-27 23:15:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 324 transitions. [2019-12-27 23:15:41,647 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 324 transitions. Word has length 19 [2019-12-27 23:15:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:41,647 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 324 transitions. [2019-12-27 23:15:41,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:15:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 324 transitions. [2019-12-27 23:15:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:41,648 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:41,648 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:41,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:41,851 INFO L410 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:41,852 INFO L82 PathProgramCache]: Analyzing trace with hash 217182013, now seen corresponding path program 209 times [2019-12-27 23:15:41,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:41,852 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102827478] [2019-12-27 23:15:41,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:41,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102827478] [2019-12-27 23:15:41,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698359498] [2019-12-27 23:15:41,951 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:42,000 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:15:42,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:42,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:15:42,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:15:42,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:42,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:15:42,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2097860259] [2019-12-27 23:15:42,056 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:42,056 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:42,059 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:15:42,059 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:42,094 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:42,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:15:42,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:42,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:15:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:15:42,095 INFO L87 Difference]: Start difference. First operand 134 states and 324 transitions. Second operand 16 states. [2019-12-27 23:15:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:42,651 INFO L93 Difference]: Finished difference Result 413 states and 893 transitions. [2019-12-27 23:15:42,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:15:42,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:15:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:42,652 INFO L225 Difference]: With dead ends: 413 [2019-12-27 23:15:42,652 INFO L226 Difference]: Without dead ends: 411 [2019-12-27 23:15:42,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=660, Invalid=1692, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 23:15:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2019-12-27 23:15:42,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 135. [2019-12-27 23:15:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 328 transitions. [2019-12-27 23:15:42,657 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 328 transitions. Word has length 19 [2019-12-27 23:15:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:42,657 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 328 transitions. [2019-12-27 23:15:42,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:15:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 328 transitions. [2019-12-27 23:15:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:42,657 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:42,658 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:42,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:42,858 INFO L410 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:42,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1175826602, now seen corresponding path program 210 times [2019-12-27 23:15:42,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:42,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370995243] [2019-12-27 23:15:42,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:42,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370995243] [2019-12-27 23:15:42,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355292685] [2019-12-27 23:15:42,940 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:43,011 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:15:43,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:43,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:43,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 23:15:43,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:43,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:15:43,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [68808868] [2019-12-27 23:15:43,039 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:43,039 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:43,041 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 23:15:43,041 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:43,041 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:43,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:43,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:43,042 INFO L87 Difference]: Start difference. First operand 135 states and 328 transitions. Second operand 14 states. [2019-12-27 23:15:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:43,376 INFO L93 Difference]: Finished difference Result 369 states and 802 transitions. [2019-12-27 23:15:43,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:15:43,377 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:43,378 INFO L225 Difference]: With dead ends: 369 [2019-12-27 23:15:43,378 INFO L226 Difference]: Without dead ends: 367 [2019-12-27 23:15:43,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:15:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-12-27 23:15:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 135. [2019-12-27 23:15:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 328 transitions. [2019-12-27 23:15:43,382 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 328 transitions. Word has length 19 [2019-12-27 23:15:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:43,382 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 328 transitions. [2019-12-27 23:15:43,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 328 transitions. [2019-12-27 23:15:43,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:43,382 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:43,382 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:43,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:43,583 INFO L410 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash -225217859, now seen corresponding path program 211 times [2019-12-27 23:15:43,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:43,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945024053] [2019-12-27 23:15:43,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:43,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945024053] [2019-12-27 23:15:43,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867979935] [2019-12-27 23:15:43,666 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:43,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:43,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:43,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:43,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:43,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1863537697] [2019-12-27 23:15:43,759 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:43,760 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:43,762 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:15:43,762 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:43,762 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:43,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:43,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:43,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:43,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:43,762 INFO L87 Difference]: Start difference. First operand 135 states and 328 transitions. Second operand 14 states. [2019-12-27 23:15:44,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:44,187 INFO L93 Difference]: Finished difference Result 414 states and 905 transitions. [2019-12-27 23:15:44,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:15:44,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:44,189 INFO L225 Difference]: With dead ends: 414 [2019-12-27 23:15:44,189 INFO L226 Difference]: Without dead ends: 412 [2019-12-27 23:15:44,189 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:15:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2019-12-27 23:15:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 134. [2019-12-27 23:15:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 324 transitions. [2019-12-27 23:15:44,193 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 324 transitions. Word has length 19 [2019-12-27 23:15:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:44,193 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 324 transitions. [2019-12-27 23:15:44,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 324 transitions. [2019-12-27 23:15:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:44,193 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:44,193 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:44,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:44,394 INFO L410 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:44,395 INFO L82 PathProgramCache]: Analyzing trace with hash 693121271, now seen corresponding path program 212 times [2019-12-27 23:15:44,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:44,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642561994] [2019-12-27 23:15:44,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:44,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642561994] [2019-12-27 23:15:44,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298154917] [2019-12-27 23:15:44,478 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:44,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:44,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:44,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:44,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:15:44,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:44,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:44,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2081171453] [2019-12-27 23:15:44,573 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:44,573 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:44,575 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:15:44,575 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:44,575 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:44,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:44,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:44,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:44,576 INFO L87 Difference]: Start difference. First operand 134 states and 324 transitions. Second operand 14 states. [2019-12-27 23:15:44,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:44,985 INFO L93 Difference]: Finished difference Result 417 states and 909 transitions. [2019-12-27 23:15:44,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:15:44,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:44,986 INFO L225 Difference]: With dead ends: 417 [2019-12-27 23:15:44,986 INFO L226 Difference]: Without dead ends: 415 [2019-12-27 23:15:44,987 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:15:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2019-12-27 23:15:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 131. [2019-12-27 23:15:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 23:15:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 313 transitions. [2019-12-27 23:15:44,990 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 313 transitions. Word has length 19 [2019-12-27 23:15:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:44,990 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 313 transitions. [2019-12-27 23:15:44,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 313 transitions. [2019-12-27 23:15:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:44,990 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:44,990 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:45,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:45,191 INFO L410 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1861781360, now seen corresponding path program 213 times [2019-12-27 23:15:45,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:45,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794770008] [2019-12-27 23:15:45,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:45,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794770008] [2019-12-27 23:15:45,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569782255] [2019-12-27 23:15:45,282 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:45,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:15:45,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:45,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:45,348 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:15:45,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:45,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:15:45,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [964986961] [2019-12-27 23:15:45,395 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:45,395 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:45,397 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:15:45,397 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:45,425 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:45,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:15:45,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:45,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:15:45,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:15:45,426 INFO L87 Difference]: Start difference. First operand 131 states and 313 transitions. Second operand 16 states. [2019-12-27 23:15:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:45,945 INFO L93 Difference]: Finished difference Result 439 states and 951 transitions. [2019-12-27 23:15:45,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:15:45,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:15:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:45,947 INFO L225 Difference]: With dead ends: 439 [2019-12-27 23:15:45,947 INFO L226 Difference]: Without dead ends: 437 [2019-12-27 23:15:45,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=639, Invalid=1617, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 23:15:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-12-27 23:15:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 134. [2019-12-27 23:15:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 324 transitions. [2019-12-27 23:15:45,952 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 324 transitions. Word has length 19 [2019-12-27 23:15:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:45,952 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 324 transitions. [2019-12-27 23:15:45,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:15:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 324 transitions. [2019-12-27 23:15:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:45,952 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:45,952 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:46,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:46,153 INFO L410 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:46,154 INFO L82 PathProgramCache]: Analyzing trace with hash -903136771, now seen corresponding path program 214 times [2019-12-27 23:15:46,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:46,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588243137] [2019-12-27 23:15:46,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:46,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588243137] [2019-12-27 23:15:46,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480217839] [2019-12-27 23:15:46,274 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:46,368 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:46,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:46,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:46,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:46,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:46,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:46,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1685052568] [2019-12-27 23:15:46,457 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:46,459 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:46,463 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:15:46,463 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:46,464 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:46,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:46,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:46,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:46,465 INFO L87 Difference]: Start difference. First operand 134 states and 324 transitions. Second operand 14 states. [2019-12-27 23:15:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:47,065 INFO L93 Difference]: Finished difference Result 424 states and 920 transitions. [2019-12-27 23:15:47,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:15:47,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:47,067 INFO L225 Difference]: With dead ends: 424 [2019-12-27 23:15:47,067 INFO L226 Difference]: Without dead ends: 422 [2019-12-27 23:15:47,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:15:47,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-12-27 23:15:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 133. [2019-12-27 23:15:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:15:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 320 transitions. [2019-12-27 23:15:47,075 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 320 transitions. Word has length 19 [2019-12-27 23:15:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:47,076 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 320 transitions. [2019-12-27 23:15:47,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 320 transitions. [2019-12-27 23:15:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:47,077 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:47,077 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:47,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:47,280 INFO L410 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:47,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:47,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1990786064, now seen corresponding path program 215 times [2019-12-27 23:15:47,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:47,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335357755] [2019-12-27 23:15:47,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:47,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335357755] [2019-12-27 23:15:47,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59034216] [2019-12-27 23:15:47,379 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:47,434 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:15:47,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:47,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:47,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:15:47,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:47,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:47,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [294102394] [2019-12-27 23:15:47,477 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:47,478 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:47,480 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:15:47,480 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:47,480 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:47,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:47,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:47,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:47,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:47,481 INFO L87 Difference]: Start difference. First operand 133 states and 320 transitions. Second operand 14 states. [2019-12-27 23:15:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:47,892 INFO L93 Difference]: Finished difference Result 442 states and 963 transitions. [2019-12-27 23:15:47,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:15:47,893 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:47,894 INFO L225 Difference]: With dead ends: 442 [2019-12-27 23:15:47,894 INFO L226 Difference]: Without dead ends: 440 [2019-12-27 23:15:47,894 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=1226, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:15:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2019-12-27 23:15:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 130. [2019-12-27 23:15:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 23:15:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 309 transitions. [2019-12-27 23:15:47,898 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 309 transitions. Word has length 19 [2019-12-27 23:15:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:47,898 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 309 transitions. [2019-12-27 23:15:47,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 309 transitions. [2019-12-27 23:15:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:47,898 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:47,898 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:48,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:48,099 INFO L410 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:48,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:48,100 INFO L82 PathProgramCache]: Analyzing trace with hash 193826890, now seen corresponding path program 216 times [2019-12-27 23:15:48,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:48,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623751926] [2019-12-27 23:15:48,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:48,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623751926] [2019-12-27 23:15:48,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834140604] [2019-12-27 23:15:48,194 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:48,258 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:15:48,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:48,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:48,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:15:48,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:48,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:48,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1161311505] [2019-12-27 23:15:48,294 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:48,295 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:48,296 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:15:48,296 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:48,328 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:48,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:15:48,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:48,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:15:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:15:48,329 INFO L87 Difference]: Start difference. First operand 130 states and 309 transitions. Second operand 16 states. [2019-12-27 23:15:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:48,875 INFO L93 Difference]: Finished difference Result 443 states and 954 transitions. [2019-12-27 23:15:48,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 23:15:48,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:15:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:48,877 INFO L225 Difference]: With dead ends: 443 [2019-12-27 23:15:48,877 INFO L226 Difference]: Without dead ends: 441 [2019-12-27 23:15:48,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=671, Invalid=1585, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 23:15:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2019-12-27 23:15:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 136. [2019-12-27 23:15:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:15:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 329 transitions. [2019-12-27 23:15:48,881 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 329 transitions. Word has length 19 [2019-12-27 23:15:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:48,881 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 329 transitions. [2019-12-27 23:15:48,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:15:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 329 transitions. [2019-12-27 23:15:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:48,882 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:48,882 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:49,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:49,083 INFO L410 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:49,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1152471479, now seen corresponding path program 217 times [2019-12-27 23:15:49,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:49,084 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165005960] [2019-12-27 23:15:49,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:49,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165005960] [2019-12-27 23:15:49,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061654639] [2019-12-27 23:15:49,159 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:49,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:49,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:15:49,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:49,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:49,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1537894479] [2019-12-27 23:15:49,253 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:49,253 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:49,255 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 23:15:49,255 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:49,255 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:49,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:49,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:49,256 INFO L87 Difference]: Start difference. First operand 136 states and 329 transitions. Second operand 14 states. [2019-12-27 23:15:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:49,695 INFO L93 Difference]: Finished difference Result 424 states and 914 transitions. [2019-12-27 23:15:49,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:15:49,695 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:49,696 INFO L225 Difference]: With dead ends: 424 [2019-12-27 23:15:49,697 INFO L226 Difference]: Without dead ends: 422 [2019-12-27 23:15:49,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=491, Invalid=1231, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:15:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-12-27 23:15:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 135. [2019-12-27 23:15:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:15:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 325 transitions. [2019-12-27 23:15:49,701 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 325 transitions. Word has length 19 [2019-12-27 23:15:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:49,701 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 325 transitions. [2019-12-27 23:15:49,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 325 transitions. [2019-12-27 23:15:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:49,701 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:49,702 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:49,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:49,902 INFO L410 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash -248572982, now seen corresponding path program 218 times [2019-12-27 23:15:49,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:49,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343264181] [2019-12-27 23:15:49,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:49,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343264181] [2019-12-27 23:15:49,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624387194] [2019-12-27 23:15:49,979 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:50,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:50,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:50,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:50,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:15:50,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:50,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:15:50,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1880889921] [2019-12-27 23:15:50,087 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:50,088 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:50,090 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:15:50,090 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:50,091 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:50,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:50,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:50,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:15:50,091 INFO L87 Difference]: Start difference. First operand 135 states and 325 transitions. Second operand 14 states. [2019-12-27 23:15:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:50,552 INFO L93 Difference]: Finished difference Result 440 states and 951 transitions. [2019-12-27 23:15:50,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 23:15:50,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:50,553 INFO L225 Difference]: With dead ends: 440 [2019-12-27 23:15:50,554 INFO L226 Difference]: Without dead ends: 438 [2019-12-27 23:15:50,554 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:15:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-12-27 23:15:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 134. [2019-12-27 23:15:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:15:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 321 transitions. [2019-12-27 23:15:50,557 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 321 transitions. Word has length 19 [2019-12-27 23:15:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:50,558 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 321 transitions. [2019-12-27 23:15:50,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 321 transitions. [2019-12-27 23:15:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:50,558 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:50,558 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:50,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:50,759 INFO L410 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:50,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:50,759 INFO L82 PathProgramCache]: Analyzing trace with hash 669766148, now seen corresponding path program 219 times [2019-12-27 23:15:50,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:50,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48723098] [2019-12-27 23:15:50,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:50,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48723098] [2019-12-27 23:15:50,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630388820] [2019-12-27 23:15:50,837 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:50,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:15:50,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:50,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:50,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:15:50,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:50,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:15:50,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [595633659] [2019-12-27 23:15:50,955 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:50,955 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:50,957 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:15:50,957 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:50,957 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:50,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:50,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:15:50,958 INFO L87 Difference]: Start difference. First operand 134 states and 321 transitions. Second operand 14 states. [2019-12-27 23:15:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:51,434 INFO L93 Difference]: Finished difference Result 451 states and 973 transitions. [2019-12-27 23:15:51,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 23:15:51,434 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:51,435 INFO L225 Difference]: With dead ends: 451 [2019-12-27 23:15:51,435 INFO L226 Difference]: Without dead ends: 449 [2019-12-27 23:15:51,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:15:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2019-12-27 23:15:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 132. [2019-12-27 23:15:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-12-27 23:15:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 314 transitions. [2019-12-27 23:15:51,440 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 314 transitions. Word has length 19 [2019-12-27 23:15:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:51,440 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 314 transitions. [2019-12-27 23:15:51,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 314 transitions. [2019-12-27 23:15:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:51,440 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:51,440 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:51,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:51,641 INFO L410 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:51,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:51,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1883745366, now seen corresponding path program 220 times [2019-12-27 23:15:51,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:51,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832677616] [2019-12-27 23:15:51,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:51,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832677616] [2019-12-27 23:15:51,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909928840] [2019-12-27 23:15:51,719 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:51,781 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:51,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:51,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:15:51,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:15:51,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:51,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:15:51,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1849555795] [2019-12-27 23:15:51,827 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:51,828 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:51,830 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 23:15:51,830 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:51,927 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:15:51,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 23:15:51,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:51,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 23:15:51,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:15:51,928 INFO L87 Difference]: Start difference. First operand 132 states and 314 transitions. Second operand 20 states. [2019-12-27 23:15:52,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:52,799 INFO L93 Difference]: Finished difference Result 478 states and 1055 transitions. [2019-12-27 23:15:52,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-27 23:15:52,799 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-12-27 23:15:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:52,800 INFO L225 Difference]: With dead ends: 478 [2019-12-27 23:15:52,800 INFO L226 Difference]: Without dead ends: 476 [2019-12-27 23:15:52,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=983, Invalid=2557, Unknown=0, NotChecked=0, Total=3540 [2019-12-27 23:15:52,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2019-12-27 23:15:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 140. [2019-12-27 23:15:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 23:15:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 343 transitions. [2019-12-27 23:15:52,805 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 343 transitions. Word has length 19 [2019-12-27 23:15:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:52,805 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 343 transitions. [2019-12-27 23:15:52,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 23:15:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 343 transitions. [2019-12-27 23:15:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:52,805 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:52,806 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:53,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:53,006 INFO L410 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:53,007 INFO L82 PathProgramCache]: Analyzing trace with hash 94564163, now seen corresponding path program 221 times [2019-12-27 23:15:53,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:53,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217331337] [2019-12-27 23:15:53,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:53,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217331337] [2019-12-27 23:15:53,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201357092] [2019-12-27 23:15:53,087 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:53,134 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:15:53,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:53,136 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:15:53,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:15:53,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:53,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:15:53,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1922031712] [2019-12-27 23:15:53,189 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:53,189 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:53,191 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:15:53,191 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:53,255 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:15:53,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:15:53,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:53,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:15:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:15:53,256 INFO L87 Difference]: Start difference. First operand 140 states and 343 transitions. Second operand 18 states. [2019-12-27 23:15:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:53,875 INFO L93 Difference]: Finished difference Result 437 states and 977 transitions. [2019-12-27 23:15:53,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:15:53,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:15:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:53,876 INFO L225 Difference]: With dead ends: 437 [2019-12-27 23:15:53,876 INFO L226 Difference]: Without dead ends: 435 [2019-12-27 23:15:53,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=744, Invalid=1806, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 23:15:53,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2019-12-27 23:15:53,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 141. [2019-12-27 23:15:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 23:15:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 347 transitions. [2019-12-27 23:15:53,881 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 347 transitions. Word has length 19 [2019-12-27 23:15:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:53,881 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 347 transitions. [2019-12-27 23:15:53,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:15:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 347 transitions. [2019-12-27 23:15:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:53,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:53,882 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:54,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:54,082 INFO L410 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2065954448, now seen corresponding path program 222 times [2019-12-27 23:15:54,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:54,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087558637] [2019-12-27 23:15:54,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:54,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087558637] [2019-12-27 23:15:54,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657117883] [2019-12-27 23:15:54,173 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:54,240 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:15:54,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:54,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:54,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 23:15:54,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:54,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:15:54,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1696226976] [2019-12-27 23:15:54,265 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:54,266 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:54,268 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:15:54,268 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:54,295 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:54,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:15:54,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:54,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:15:54,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:15:54,296 INFO L87 Difference]: Start difference. First operand 141 states and 347 transitions. Second operand 16 states. [2019-12-27 23:15:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:54,711 INFO L93 Difference]: Finished difference Result 380 states and 860 transitions. [2019-12-27 23:15:54,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:15:54,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:15:54,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:54,712 INFO L225 Difference]: With dead ends: 380 [2019-12-27 23:15:54,712 INFO L226 Difference]: Without dead ends: 378 [2019-12-27 23:15:54,713 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:15:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2019-12-27 23:15:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 143. [2019-12-27 23:15:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:15:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 355 transitions. [2019-12-27 23:15:54,717 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 355 transitions. Word has length 19 [2019-12-27 23:15:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:54,717 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 355 transitions. [2019-12-27 23:15:54,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:15:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 355 transitions. [2019-12-27 23:15:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:54,717 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:54,717 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:54,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:54,918 INFO L410 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1107309859, now seen corresponding path program 223 times [2019-12-27 23:15:54,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:54,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427275601] [2019-12-27 23:15:54,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:55,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427275601] [2019-12-27 23:15:55,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844891682] [2019-12-27 23:15:55,000 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:55,061 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:15:55,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-27 23:15:55,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:55,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 23:15:55,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [883880934] [2019-12-27 23:15:55,078 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:55,079 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:55,081 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 23:15:55,081 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:55,081 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:55,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:55,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:15:55,082 INFO L87 Difference]: Start difference. First operand 143 states and 355 transitions. Second operand 14 states. [2019-12-27 23:15:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:55,314 INFO L93 Difference]: Finished difference Result 321 states and 733 transitions. [2019-12-27 23:15:55,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:15:55,315 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:55,316 INFO L225 Difference]: With dead ends: 321 [2019-12-27 23:15:55,316 INFO L226 Difference]: Without dead ends: 319 [2019-12-27 23:15:55,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:15:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-12-27 23:15:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 144. [2019-12-27 23:15:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 23:15:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2019-12-27 23:15:55,320 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 19 [2019-12-27 23:15:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:55,320 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2019-12-27 23:15:55,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2019-12-27 23:15:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:55,320 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:55,320 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:55,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:55,521 INFO L410 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:55,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1786612976, now seen corresponding path program 224 times [2019-12-27 23:15:55,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:55,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555891560] [2019-12-27 23:15:55,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:55,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555891560] [2019-12-27 23:15:55,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194209327] [2019-12-27 23:15:55,608 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:55,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:15:55,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:55,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:55,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:15:55,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:55,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:15:55,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [257720589] [2019-12-27 23:15:55,701 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:55,701 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:55,703 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:15:55,703 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:55,703 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:55,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:55,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:55,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:55,704 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 14 states. [2019-12-27 23:15:56,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:56,045 INFO L93 Difference]: Finished difference Result 394 states and 897 transitions. [2019-12-27 23:15:56,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:15:56,046 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:56,047 INFO L225 Difference]: With dead ends: 394 [2019-12-27 23:15:56,047 INFO L226 Difference]: Without dead ends: 392 [2019-12-27 23:15:56,047 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:15:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-12-27 23:15:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 143. [2019-12-27 23:15:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:15:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2019-12-27 23:15:56,051 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 19 [2019-12-27 23:15:56,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:56,051 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2019-12-27 23:15:56,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:56,051 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2019-12-27 23:15:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:56,051 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:56,051 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:56,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:56,252 INFO L410 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:56,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1590015190, now seen corresponding path program 225 times [2019-12-27 23:15:56,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:56,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579627167] [2019-12-27 23:15:56,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:56,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579627167] [2019-12-27 23:15:56,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291548943] [2019-12-27 23:15:56,334 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:56,396 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:15:56,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:56,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:15:56,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 23:15:56,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:56,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:15:56,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1795554869] [2019-12-27 23:15:56,425 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:56,425 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:56,427 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:15:56,427 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:56,427 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:56,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:56,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:15:56,427 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 14 states. [2019-12-27 23:15:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:56,759 INFO L93 Difference]: Finished difference Result 403 states and 917 transitions. [2019-12-27 23:15:56,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:15:56,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:56,761 INFO L225 Difference]: With dead ends: 403 [2019-12-27 23:15:56,761 INFO L226 Difference]: Without dead ends: 401 [2019-12-27 23:15:56,761 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:15:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2019-12-27 23:15:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 142. [2019-12-27 23:15:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 23:15:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 23:15:56,765 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 23:15:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:56,765 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 23:15:56,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 23:15:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:56,765 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:56,765 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:56,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:56,966 INFO L410 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash 150049475, now seen corresponding path program 226 times [2019-12-27 23:15:56,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:56,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398648506] [2019-12-27 23:15:56,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:57,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398648506] [2019-12-27 23:15:57,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023519387] [2019-12-27 23:15:57,050 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:57,111 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:15:57,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:57,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:57,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:57,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:57,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:57,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1791998001] [2019-12-27 23:15:57,146 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:57,147 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:57,149 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:15:57,149 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:57,177 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:57,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:15:57,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:15:57,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:15:57,178 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 16 states. [2019-12-27 23:15:57,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:57,630 INFO L93 Difference]: Finished difference Result 437 states and 986 transitions. [2019-12-27 23:15:57,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:15:57,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:15:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:57,632 INFO L225 Difference]: With dead ends: 437 [2019-12-27 23:15:57,632 INFO L226 Difference]: Without dead ends: 435 [2019-12-27 23:15:57,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=529, Invalid=1277, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 23:15:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2019-12-27 23:15:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 144. [2019-12-27 23:15:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 23:15:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 355 transitions. [2019-12-27 23:15:57,636 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 355 transitions. Word has length 19 [2019-12-27 23:15:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:57,636 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 355 transitions. [2019-12-27 23:15:57,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:15:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 355 transitions. [2019-12-27 23:15:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:57,637 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:57,637 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:57,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:57,838 INFO L410 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1108694064, now seen corresponding path program 227 times [2019-12-27 23:15:57,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:57,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702151280] [2019-12-27 23:15:57,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:57,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702151280] [2019-12-27 23:15:57,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166162267] [2019-12-27 23:15:57,919 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:57,971 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:15:57,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:57,971 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 23:15:57,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:58,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:58,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2019-12-27 23:15:58,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [606909203] [2019-12-27 23:15:58,050 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:58,051 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:58,053 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:15:58,053 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:58,053 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:58,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:58,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:58,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:58,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:15:58,054 INFO L87 Difference]: Start difference. First operand 144 states and 355 transitions. Second operand 14 states. [2019-12-27 23:15:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:58,438 INFO L93 Difference]: Finished difference Result 415 states and 943 transitions. [2019-12-27 23:15:58,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:15:58,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:58,439 INFO L225 Difference]: With dead ends: 415 [2019-12-27 23:15:58,439 INFO L226 Difference]: Without dead ends: 413 [2019-12-27 23:15:58,440 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:15:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2019-12-27 23:15:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 144. [2019-12-27 23:15:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 23:15:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 355 transitions. [2019-12-27 23:15:58,444 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 355 transitions. Word has length 19 [2019-12-27 23:15:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:58,444 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 355 transitions. [2019-12-27 23:15:58,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 355 transitions. [2019-12-27 23:15:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:58,445 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:58,445 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:58,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:58,648 INFO L410 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash -292350397, now seen corresponding path program 228 times [2019-12-27 23:15:58,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:58,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587151967] [2019-12-27 23:15:58,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:58,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587151967] [2019-12-27 23:15:58,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334468091] [2019-12-27 23:15:58,726 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:58,796 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:15:58,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:15:58,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:15:58,798 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:15:58,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:58,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:15:58,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [954171462] [2019-12-27 23:15:58,831 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:58,832 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:58,834 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:15:58,834 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:58,834 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:15:58,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:15:58,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:58,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:15:58,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:15:58,835 INFO L87 Difference]: Start difference. First operand 144 states and 355 transitions. Second operand 14 states. [2019-12-27 23:15:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:15:59,205 INFO L93 Difference]: Finished difference Result 445 states and 1007 transitions. [2019-12-27 23:15:59,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:15:59,206 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:15:59,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:15:59,207 INFO L225 Difference]: With dead ends: 445 [2019-12-27 23:15:59,207 INFO L226 Difference]: Without dead ends: 443 [2019-12-27 23:15:59,207 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:15:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2019-12-27 23:15:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 141. [2019-12-27 23:15:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 23:15:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 23:15:59,211 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 23:15:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:15:59,211 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 23:15:59,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:15:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 23:15:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:15:59,212 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:15:59,212 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:15:59,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:59,413 INFO L410 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:15:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:15:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2089309571, now seen corresponding path program 229 times [2019-12-27 23:15:59,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:15:59,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341175272] [2019-12-27 23:15:59,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:15:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:15:59,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341175272] [2019-12-27 23:15:59,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993029743] [2019-12-27 23:15:59,493 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:15:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:15:59,558 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:15:59,559 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:15:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:15:59,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:15:59,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:15:59,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [120743645] [2019-12-27 23:15:59,615 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:15:59,615 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:15:59,617 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:15:59,617 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:15:59,649 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:15:59,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:15:59,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:15:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:15:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:15:59,650 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 16 states. [2019-12-27 23:16:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:00,141 INFO L93 Difference]: Finished difference Result 432 states and 975 transitions. [2019-12-27 23:16:00,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 23:16:00,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:00,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:00,142 INFO L225 Difference]: With dead ends: 432 [2019-12-27 23:16:00,142 INFO L226 Difference]: Without dead ends: 430 [2019-12-27 23:16:00,143 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1485, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:16:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-12-27 23:16:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 142. [2019-12-27 23:16:00,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 23:16:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 23:16:00,146 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 23:16:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:00,146 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 23:16:00,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 23:16:00,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:00,146 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:00,146 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:00,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:00,347 INFO L410 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:00,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1130664982, now seen corresponding path program 230 times [2019-12-27 23:16:00,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:00,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604162531] [2019-12-27 23:16:00,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:00,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604162531] [2019-12-27 23:16:00,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236434901] [2019-12-27 23:16:00,428 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:00,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:00,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:00,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:00,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 23:16:00,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:00,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:00,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1972599690] [2019-12-27 23:16:00,522 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:00,523 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:00,524 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:00,525 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:00,525 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:00,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:00,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:00,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:00,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:00,525 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 14 states. [2019-12-27 23:16:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:00,878 INFO L93 Difference]: Finished difference Result 405 states and 920 transitions. [2019-12-27 23:16:00,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:16:00,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:00,880 INFO L225 Difference]: With dead ends: 405 [2019-12-27 23:16:00,880 INFO L226 Difference]: Without dead ends: 403 [2019-12-27 23:16:00,880 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:16:00,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2019-12-27 23:16:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 142. [2019-12-27 23:16:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 23:16:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 23:16:00,884 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 23:16:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:00,884 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 23:16:00,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 23:16:00,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:00,884 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:00,884 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:01,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:01,085 INFO L410 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:01,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:01,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1763257853, now seen corresponding path program 231 times [2019-12-27 23:16:01,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:01,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380719085] [2019-12-27 23:16:01,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:01,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380719085] [2019-12-27 23:16:01,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742208732] [2019-12-27 23:16:01,208 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:01,309 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:16:01,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:01,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:01,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:16:01,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:01,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:01,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1404077533] [2019-12-27 23:16:01,371 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:01,372 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:01,374 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:01,374 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:01,375 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:01,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:01,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:01,375 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 14 states. [2019-12-27 23:16:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:01,751 INFO L93 Difference]: Finished difference Result 431 states and 980 transitions. [2019-12-27 23:16:01,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:16:01,751 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:01,752 INFO L225 Difference]: With dead ends: 431 [2019-12-27 23:16:01,752 INFO L226 Difference]: Without dead ends: 429 [2019-12-27 23:16:01,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=1054, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:16:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2019-12-27 23:16:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 141. [2019-12-27 23:16:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 23:16:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 23:16:01,756 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 23:16:01,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:01,756 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 23:16:01,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 23:16:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:01,757 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:01,757 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:01,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:01,958 INFO L410 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:01,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1613370313, now seen corresponding path program 232 times [2019-12-27 23:16:01,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:01,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559750147] [2019-12-27 23:16:01,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:02,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559750147] [2019-12-27 23:16:02,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628125272] [2019-12-27 23:16:02,049 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:02,109 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:02,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:02,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:02,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:16:02,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:02,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:02,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1394677960] [2019-12-27 23:16:02,148 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:02,148 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:02,150 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:02,150 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:02,150 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:02,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:02,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:02,151 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 14 states. [2019-12-27 23:16:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:02,529 INFO L93 Difference]: Finished difference Result 440 states and 994 transitions. [2019-12-27 23:16:02,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:16:02,530 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:02,531 INFO L225 Difference]: With dead ends: 440 [2019-12-27 23:16:02,531 INFO L226 Difference]: Without dead ends: 438 [2019-12-27 23:16:02,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=1054, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:16:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-12-27 23:16:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 136. [2019-12-27 23:16:02,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:16:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 326 transitions. [2019-12-27 23:16:02,535 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 326 transitions. Word has length 19 [2019-12-27 23:16:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:02,535 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 326 transitions. [2019-12-27 23:16:02,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 326 transitions. [2019-12-27 23:16:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:02,535 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:02,536 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:02,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:02,736 INFO L410 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash -629444650, now seen corresponding path program 233 times [2019-12-27 23:16:02,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:02,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4643016] [2019-12-27 23:16:02,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:02,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4643016] [2019-12-27 23:16:02,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331329754] [2019-12-27 23:16:02,817 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:02,862 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:16:02,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:02,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:02,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:16:02,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:02,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:02,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1701744033] [2019-12-27 23:16:02,898 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:02,899 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:02,900 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:02,900 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:02,962 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:02,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:16:02,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:02,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:16:02,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:16:02,963 INFO L87 Difference]: Start difference. First operand 136 states and 326 transitions. Second operand 18 states. [2019-12-27 23:16:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:03,619 INFO L93 Difference]: Finished difference Result 460 states and 1025 transitions. [2019-12-27 23:16:03,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 23:16:03,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:16:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:03,620 INFO L225 Difference]: With dead ends: 460 [2019-12-27 23:16:03,621 INFO L226 Difference]: Without dead ends: 458 [2019-12-27 23:16:03,621 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=774, Invalid=1776, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 23:16:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2019-12-27 23:16:03,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 141. [2019-12-27 23:16:03,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 23:16:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 23:16:03,625 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 23:16:03,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:03,625 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 23:16:03,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:16:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 23:16:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:03,625 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:03,626 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:03,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:03,826 INFO L410 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1505004035, now seen corresponding path program 234 times [2019-12-27 23:16:03,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:03,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472011134] [2019-12-27 23:16:03,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:03,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472011134] [2019-12-27 23:16:03,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169912269] [2019-12-27 23:16:03,907 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:03,975 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:16:03,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:03,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:03,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:16:04,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:04,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:04,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1098882643] [2019-12-27 23:16:04,011 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:04,012 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:04,013 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:04,014 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:04,043 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:04,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:04,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:04,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:04,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:04,044 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 16 states. [2019-12-27 23:16:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:04,538 INFO L93 Difference]: Finished difference Result 432 states and 972 transitions. [2019-12-27 23:16:04,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:16:04,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:04,539 INFO L225 Difference]: With dead ends: 432 [2019-12-27 23:16:04,539 INFO L226 Difference]: Without dead ends: 430 [2019-12-27 23:16:04,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1401, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 23:16:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-12-27 23:16:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 142. [2019-12-27 23:16:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 23:16:04,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 23:16:04,543 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 23:16:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:04,543 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 23:16:04,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 23:16:04,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:04,543 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:04,543 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:04,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:04,744 INFO L410 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:04,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1831318672, now seen corresponding path program 235 times [2019-12-27 23:16:04,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:04,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643459695] [2019-12-27 23:16:04,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:04,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643459695] [2019-12-27 23:16:04,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542390135] [2019-12-27 23:16:04,833 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:04,899 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:04,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:16:04,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:04,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:04,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1131224744] [2019-12-27 23:16:04,924 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:04,925 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:04,927 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:16:04,927 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:04,927 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:04,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:04,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:04,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:04,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:04,928 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 14 states. [2019-12-27 23:16:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:05,267 INFO L93 Difference]: Finished difference Result 401 states and 908 transitions. [2019-12-27 23:16:05,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:16:05,268 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:05,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:05,269 INFO L225 Difference]: With dead ends: 401 [2019-12-27 23:16:05,269 INFO L226 Difference]: Without dead ends: 399 [2019-12-27 23:16:05,269 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:16:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2019-12-27 23:16:05,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 142. [2019-12-27 23:16:05,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 23:16:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2019-12-27 23:16:05,273 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 19 [2019-12-27 23:16:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:05,274 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2019-12-27 23:16:05,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2019-12-27 23:16:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:05,274 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:05,274 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:05,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:05,475 INFO L410 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:05,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1062604163, now seen corresponding path program 236 times [2019-12-27 23:16:05,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:05,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388266236] [2019-12-27 23:16:05,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:05,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388266236] [2019-12-27 23:16:05,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974936623] [2019-12-27 23:16:05,582 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:05,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:05,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:05,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:05,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:16:05,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:05,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:05,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1691080421] [2019-12-27 23:16:05,682 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:05,682 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:05,684 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:05,684 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:05,684 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:05,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:05,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:05,684 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 14 states. [2019-12-27 23:16:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:06,088 INFO L93 Difference]: Finished difference Result 430 states and 976 transitions. [2019-12-27 23:16:06,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:16:06,089 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:06,090 INFO L225 Difference]: With dead ends: 430 [2019-12-27 23:16:06,090 INFO L226 Difference]: Without dead ends: 428 [2019-12-27 23:16:06,090 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:16:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-12-27 23:16:06,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 141. [2019-12-27 23:16:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 23:16:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 23:16:06,094 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 23:16:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:06,094 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 23:16:06,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 23:16:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:06,094 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:06,094 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:06,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:06,295 INFO L410 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:06,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1980943293, now seen corresponding path program 237 times [2019-12-27 23:16:06,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:06,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839837593] [2019-12-27 23:16:06,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:06,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839837593] [2019-12-27 23:16:06,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751609950] [2019-12-27 23:16:06,374 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:06,446 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:16:06,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:06,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:06,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:06,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:06,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:06,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [82491061] [2019-12-27 23:16:06,504 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:06,505 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:06,507 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:06,507 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:06,507 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:06,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:06,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:06,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:06,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:06,507 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 14 states. [2019-12-27 23:16:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:06,922 INFO L93 Difference]: Finished difference Result 429 states and 971 transitions. [2019-12-27 23:16:06,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:16:06,922 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:06,923 INFO L225 Difference]: With dead ends: 429 [2019-12-27 23:16:06,923 INFO L226 Difference]: Without dead ends: 427 [2019-12-27 23:16:06,924 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:16:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2019-12-27 23:16:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 138. [2019-12-27 23:16:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 23:16:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 333 transitions. [2019-12-27 23:16:06,928 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 333 transitions. Word has length 19 [2019-12-27 23:16:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:06,928 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 333 transitions. [2019-12-27 23:16:06,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:06,928 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 333 transitions. [2019-12-27 23:16:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:06,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:06,928 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:07,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:07,129 INFO L410 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:07,130 INFO L82 PathProgramCache]: Analyzing trace with hash -573959338, now seen corresponding path program 238 times [2019-12-27 23:16:07,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:07,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832717475] [2019-12-27 23:16:07,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:07,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832717475] [2019-12-27 23:16:07,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600121777] [2019-12-27 23:16:07,209 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:07,269 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:07,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:07,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:16:07,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:16:07,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:07,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:16:07,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [757038338] [2019-12-27 23:16:07,314 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:07,315 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:07,317 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:07,317 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:07,357 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:07,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:07,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:07,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:16:07,358 INFO L87 Difference]: Start difference. First operand 138 states and 333 transitions. Second operand 16 states. [2019-12-27 23:16:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:07,835 INFO L93 Difference]: Finished difference Result 459 states and 1027 transitions. [2019-12-27 23:16:07,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:16:07,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:07,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:07,836 INFO L225 Difference]: With dead ends: 459 [2019-12-27 23:16:07,836 INFO L226 Difference]: Without dead ends: 457 [2019-12-27 23:16:07,837 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1485, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:16:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2019-12-27 23:16:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 141. [2019-12-27 23:16:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 23:16:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 344 transitions. [2019-12-27 23:16:07,841 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 344 transitions. Word has length 19 [2019-12-27 23:16:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:07,841 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 344 transitions. [2019-12-27 23:16:07,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 344 transitions. [2019-12-27 23:16:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:07,842 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:07,842 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:08,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:08,043 INFO L410 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:08,043 INFO L82 PathProgramCache]: Analyzing trace with hash 384685251, now seen corresponding path program 239 times [2019-12-27 23:16:08,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:08,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745401109] [2019-12-27 23:16:08,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:08,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745401109] [2019-12-27 23:16:08,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197571043] [2019-12-27 23:16:08,120 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:08,171 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:16:08,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:08,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:08,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:16:08,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:08,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:08,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1659363902] [2019-12-27 23:16:08,226 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:08,227 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:08,228 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:08,228 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:08,228 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:08,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:08,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:08,229 INFO L87 Difference]: Start difference. First operand 141 states and 344 transitions. Second operand 14 states. [2019-12-27 23:16:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:08,636 INFO L93 Difference]: Finished difference Result 443 states and 995 transitions. [2019-12-27 23:16:08,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:16:08,637 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:08,638 INFO L225 Difference]: With dead ends: 443 [2019-12-27 23:16:08,638 INFO L226 Difference]: Without dead ends: 441 [2019-12-27 23:16:08,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:16:08,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2019-12-27 23:16:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 140. [2019-12-27 23:16:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 23:16:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 340 transitions. [2019-12-27 23:16:08,641 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 340 transitions. Word has length 19 [2019-12-27 23:16:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:08,641 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 340 transitions. [2019-12-27 23:16:08,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 340 transitions. [2019-12-27 23:16:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:08,641 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:08,642 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:08,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:08,842 INFO L410 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1016359210, now seen corresponding path program 240 times [2019-12-27 23:16:08,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:08,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420527360] [2019-12-27 23:16:08,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:08,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420527360] [2019-12-27 23:16:08,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274598182] [2019-12-27 23:16:08,924 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:08,997 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:16:08,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:08,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:16:08,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:16:09,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:09,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:16:09,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [295754404] [2019-12-27 23:16:09,066 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:09,067 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:09,069 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:09,070 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:09,070 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:09,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:09,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:09,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:09,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:16:09,070 INFO L87 Difference]: Start difference. First operand 140 states and 340 transitions. Second operand 14 states. [2019-12-27 23:16:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:09,478 INFO L93 Difference]: Finished difference Result 457 states and 1024 transitions. [2019-12-27 23:16:09,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:16:09,478 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:09,479 INFO L225 Difference]: With dead ends: 457 [2019-12-27 23:16:09,479 INFO L226 Difference]: Without dead ends: 455 [2019-12-27 23:16:09,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=456, Invalid=1184, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:16:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-12-27 23:16:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 135. [2019-12-27 23:16:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 23:16:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 322 transitions. [2019-12-27 23:16:09,484 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 322 transitions. Word has length 19 [2019-12-27 23:16:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:09,484 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 322 transitions. [2019-12-27 23:16:09,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 322 transitions. [2019-12-27 23:16:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:09,484 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:09,484 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:09,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:09,685 INFO L410 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:09,686 INFO L82 PathProgramCache]: Analyzing trace with hash -874872560, now seen corresponding path program 241 times [2019-12-27 23:16:09,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:09,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677958816] [2019-12-27 23:16:09,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:09,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677958816] [2019-12-27 23:16:09,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427659133] [2019-12-27 23:16:09,764 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:09,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:09,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:16:09,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:09,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:09,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1101340245] [2019-12-27 23:16:09,868 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:09,869 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:09,871 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:09,871 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:09,937 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:09,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:16:09,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:16:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:16:09,938 INFO L87 Difference]: Start difference. First operand 135 states and 322 transitions. Second operand 18 states. [2019-12-27 23:16:10,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:10,617 INFO L93 Difference]: Finished difference Result 457 states and 1014 transitions. [2019-12-27 23:16:10,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 23:16:10,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:16:10,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:10,618 INFO L225 Difference]: With dead ends: 457 [2019-12-27 23:16:10,619 INFO L226 Difference]: Without dead ends: 455 [2019-12-27 23:16:10,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1845, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 23:16:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-12-27 23:16:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 143. [2019-12-27 23:16:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:16:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 349 transitions. [2019-12-27 23:16:10,623 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 349 transitions. Word has length 19 [2019-12-27 23:16:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:10,623 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 349 transitions. [2019-12-27 23:16:10,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:16:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 349 transitions. [2019-12-27 23:16:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:10,623 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:10,623 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:10,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:10,824 INFO L410 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1259576125, now seen corresponding path program 242 times [2019-12-27 23:16:10,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:10,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594074221] [2019-12-27 23:16:10,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:10,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594074221] [2019-12-27 23:16:10,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333419778] [2019-12-27 23:16:10,903 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:10,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:10,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:10,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:10,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:16:11,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:11,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:11,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1900254791] [2019-12-27 23:16:11,026 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:11,027 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:11,036 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:11,036 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:11,075 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:11,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:11,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:11,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:11,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:16:11,076 INFO L87 Difference]: Start difference. First operand 143 states and 349 transitions. Second operand 16 states. [2019-12-27 23:16:11,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:11,638 INFO L93 Difference]: Finished difference Result 425 states and 952 transitions. [2019-12-27 23:16:11,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 23:16:11,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:11,639 INFO L225 Difference]: With dead ends: 425 [2019-12-27 23:16:11,640 INFO L226 Difference]: Without dead ends: 423 [2019-12-27 23:16:11,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=635, Invalid=1621, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 23:16:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2019-12-27 23:16:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 144. [2019-12-27 23:16:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 23:16:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 353 transitions. [2019-12-27 23:16:11,644 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 353 transitions. Word has length 19 [2019-12-27 23:16:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:11,644 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 353 transitions. [2019-12-27 23:16:11,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 353 transitions. [2019-12-27 23:16:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:11,645 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:11,645 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:11,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:11,846 INFO L410 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:11,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:11,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2076746582, now seen corresponding path program 243 times [2019-12-27 23:16:11,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:11,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945362147] [2019-12-27 23:16:11,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:11,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945362147] [2019-12-27 23:16:11,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037106135] [2019-12-27 23:16:11,928 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:11,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:16:11,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:11,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:12,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 23:16:12,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:12,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:12,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2123533546] [2019-12-27 23:16:12,025 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:12,026 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:12,027 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 23:16:12,027 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:12,028 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:12,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:12,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:12,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:12,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:12,028 INFO L87 Difference]: Start difference. First operand 144 states and 353 transitions. Second operand 14 states. [2019-12-27 23:16:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:12,389 INFO L93 Difference]: Finished difference Result 391 states and 880 transitions. [2019-12-27 23:16:12,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:16:12,389 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:12,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:12,390 INFO L225 Difference]: With dead ends: 391 [2019-12-27 23:16:12,390 INFO L226 Difference]: Without dead ends: 389 [2019-12-27 23:16:12,391 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:16:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-12-27 23:16:12,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 144. [2019-12-27 23:16:12,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 23:16:12,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 353 transitions. [2019-12-27 23:16:12,395 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 353 transitions. Word has length 19 [2019-12-27 23:16:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:12,395 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 353 transitions. [2019-12-27 23:16:12,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 353 transitions. [2019-12-27 23:16:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:12,395 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:12,395 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:12,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:12,596 INFO L410 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:12,597 INFO L82 PathProgramCache]: Analyzing trace with hash 817176253, now seen corresponding path program 244 times [2019-12-27 23:16:12,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:12,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343606773] [2019-12-27 23:16:12,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:12,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343606773] [2019-12-27 23:16:12,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294081263] [2019-12-27 23:16:12,679 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:12,741 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:12,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:12,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:12,743 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:16:12,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:12,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:12,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1095587776] [2019-12-27 23:16:12,778 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:12,779 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:12,787 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:12,787 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:12,787 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:12,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:12,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:12,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:12,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:12,788 INFO L87 Difference]: Start difference. First operand 144 states and 353 transitions. Second operand 14 states. [2019-12-27 23:16:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:13,202 INFO L93 Difference]: Finished difference Result 422 states and 955 transitions. [2019-12-27 23:16:13,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:16:13,203 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:13,204 INFO L225 Difference]: With dead ends: 422 [2019-12-27 23:16:13,204 INFO L226 Difference]: Without dead ends: 420 [2019-12-27 23:16:13,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:16:13,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2019-12-27 23:16:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 143. [2019-12-27 23:16:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:16:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 349 transitions. [2019-12-27 23:16:13,208 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 349 transitions. Word has length 19 [2019-12-27 23:16:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:13,208 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 349 transitions. [2019-12-27 23:16:13,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 349 transitions. [2019-12-27 23:16:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:13,209 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:13,209 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:13,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:13,410 INFO L410 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:13,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1735515383, now seen corresponding path program 245 times [2019-12-27 23:16:13,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:13,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970038696] [2019-12-27 23:16:13,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:13,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970038696] [2019-12-27 23:16:13,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233896312] [2019-12-27 23:16:13,492 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:13,541 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:16:13,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:13,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:13,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:13,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:13,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:13,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1211838348] [2019-12-27 23:16:13,605 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:13,606 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:13,608 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:13,608 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:13,608 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:13,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:13,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:13,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:13,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:13,608 INFO L87 Difference]: Start difference. First operand 143 states and 349 transitions. Second operand 14 states. [2019-12-27 23:16:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:14,044 INFO L93 Difference]: Finished difference Result 421 states and 950 transitions. [2019-12-27 23:16:14,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:16:14,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:14,045 INFO L225 Difference]: With dead ends: 421 [2019-12-27 23:16:14,045 INFO L226 Difference]: Without dead ends: 419 [2019-12-27 23:16:14,046 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 23:16:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-12-27 23:16:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 140. [2019-12-27 23:16:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 23:16:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 338 transitions. [2019-12-27 23:16:14,050 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 338 transitions. Word has length 19 [2019-12-27 23:16:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:14,050 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 338 transitions. [2019-12-27 23:16:14,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 338 transitions. [2019-12-27 23:16:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:14,050 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:14,050 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:14,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:14,251 INFO L410 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:14,252 INFO L82 PathProgramCache]: Analyzing trace with hash -819387248, now seen corresponding path program 246 times [2019-12-27 23:16:14,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:14,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855287190] [2019-12-27 23:16:14,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:14,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855287190] [2019-12-27 23:16:14,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148980440] [2019-12-27 23:16:14,334 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:14,411 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:16:14,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:14,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:14,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:16:14,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:14,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:14,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [394013487] [2019-12-27 23:16:14,446 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:14,447 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:14,448 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:14,448 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:14,507 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:14,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:14,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:14,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:14,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:14,508 INFO L87 Difference]: Start difference. First operand 140 states and 338 transitions. Second operand 16 states. [2019-12-27 23:16:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:15,025 INFO L93 Difference]: Finished difference Result 433 states and 965 transitions. [2019-12-27 23:16:15,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 23:16:15,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:15,026 INFO L225 Difference]: With dead ends: 433 [2019-12-27 23:16:15,027 INFO L226 Difference]: Without dead ends: 431 [2019-12-27 23:16:15,027 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=618, Invalid=1452, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:16:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-12-27 23:16:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 143. [2019-12-27 23:16:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:16:15,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 349 transitions. [2019-12-27 23:16:15,031 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 349 transitions. Word has length 19 [2019-12-27 23:16:15,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:15,031 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 349 transitions. [2019-12-27 23:16:15,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:15,031 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 349 transitions. [2019-12-27 23:16:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:15,031 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:15,031 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:15,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:15,232 INFO L410 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash 139257341, now seen corresponding path program 247 times [2019-12-27 23:16:15,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:15,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629040959] [2019-12-27 23:16:15,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:15,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629040959] [2019-12-27 23:16:15,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803229835] [2019-12-27 23:16:15,320 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:15,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:15,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:16:15,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:15,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:15,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [80924660] [2019-12-27 23:16:15,419 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:15,420 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:15,422 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:15,422 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:15,422 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:15,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:15,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:15,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:15,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:15,423 INFO L87 Difference]: Start difference. First operand 143 states and 349 transitions. Second operand 14 states. [2019-12-27 23:16:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:15,872 INFO L93 Difference]: Finished difference Result 423 states and 951 transitions. [2019-12-27 23:16:15,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:16:15,872 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:15,873 INFO L225 Difference]: With dead ends: 423 [2019-12-27 23:16:15,873 INFO L226 Difference]: Without dead ends: 421 [2019-12-27 23:16:15,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:16:15,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-12-27 23:16:15,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 142. [2019-12-27 23:16:15,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 23:16:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 345 transitions. [2019-12-27 23:16:15,877 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 345 transitions. Word has length 19 [2019-12-27 23:16:15,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:15,878 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 345 transitions. [2019-12-27 23:16:15,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 345 transitions. [2019-12-27 23:16:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:15,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:15,878 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:16,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:16,079 INFO L410 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:16,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1261787120, now seen corresponding path program 248 times [2019-12-27 23:16:16,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:16,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848456936] [2019-12-27 23:16:16,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:16,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848456936] [2019-12-27 23:16:16,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963366056] [2019-12-27 23:16:16,165 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:16,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:16,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:16,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:16:16,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:16:16,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:16,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:16:16,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1010600787] [2019-12-27 23:16:16,272 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:16,273 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:16,274 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:16,274 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:16,274 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:16,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:16,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:16,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:16,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:16:16,275 INFO L87 Difference]: Start difference. First operand 142 states and 345 transitions. Second operand 14 states. [2019-12-27 23:16:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:16,714 INFO L93 Difference]: Finished difference Result 439 states and 986 transitions. [2019-12-27 23:16:16,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:16:16,715 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:16,716 INFO L225 Difference]: With dead ends: 439 [2019-12-27 23:16:16,716 INFO L226 Difference]: Without dead ends: 437 [2019-12-27 23:16:16,716 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=479, Invalid=1243, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:16:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-12-27 23:16:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 139. [2019-12-27 23:16:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 23:16:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 334 transitions. [2019-12-27 23:16:16,720 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 334 transitions. Word has length 19 [2019-12-27 23:16:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:16,720 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 334 transitions. [2019-12-27 23:16:16,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 334 transitions. [2019-12-27 23:16:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:16,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:16,721 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:16,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:16,922 INFO L410 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1236221002, now seen corresponding path program 249 times [2019-12-27 23:16:16,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:16,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069832394] [2019-12-27 23:16:16,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:16,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069832394] [2019-12-27 23:16:16,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811449376] [2019-12-27 23:16:16,999 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:17,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:16:17,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:17,070 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:16:17,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:16:17,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:17,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:16:17,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [381949187] [2019-12-27 23:16:17,120 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:17,120 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:17,122 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:17,122 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:17,149 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:17,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:17,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:17,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:17,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:16:17,150 INFO L87 Difference]: Start difference. First operand 139 states and 334 transitions. Second operand 16 states. [2019-12-27 23:16:17,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:17,703 INFO L93 Difference]: Finished difference Result 456 states and 1012 transitions. [2019-12-27 23:16:17,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:16:17,703 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:17,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:17,704 INFO L225 Difference]: With dead ends: 456 [2019-12-27 23:16:17,704 INFO L226 Difference]: Without dead ends: 454 [2019-12-27 23:16:17,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=637, Invalid=1619, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 23:16:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2019-12-27 23:16:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 145. [2019-12-27 23:16:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:16:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:16:17,709 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:16:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:17,709 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:16:17,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:16:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:17,709 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:17,709 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:17,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:17,911 INFO L410 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2100101705, now seen corresponding path program 250 times [2019-12-27 23:16:17,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:17,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919316966] [2019-12-27 23:16:17,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:17,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919316966] [2019-12-27 23:16:17,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134169285] [2019-12-27 23:16:17,989 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:18,052 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:18,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:18,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:18,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:16:18,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:18,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:18,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [385977091] [2019-12-27 23:16:18,086 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:18,087 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:18,089 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:18,089 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:18,096 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:18,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:18,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:18,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:18,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:18,097 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 23:16:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:18,519 INFO L93 Difference]: Finished difference Result 433 states and 963 transitions. [2019-12-27 23:16:18,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:16:18,519 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:18,520 INFO L225 Difference]: With dead ends: 433 [2019-12-27 23:16:18,520 INFO L226 Difference]: Without dead ends: 431 [2019-12-27 23:16:18,521 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:16:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-12-27 23:16:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 144. [2019-12-27 23:16:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 23:16:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 350 transitions. [2019-12-27 23:16:18,525 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 350 transitions. Word has length 19 [2019-12-27 23:16:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:18,525 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 350 transitions. [2019-12-27 23:16:18,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 350 transitions. [2019-12-27 23:16:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:18,525 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:18,525 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:18,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:18,726 INFO L410 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:18,727 INFO L82 PathProgramCache]: Analyzing trace with hash 793821130, now seen corresponding path program 251 times [2019-12-27 23:16:18,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:18,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497251147] [2019-12-27 23:16:18,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:18,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497251147] [2019-12-27 23:16:18,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27469307] [2019-12-27 23:16:18,805 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:18,854 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:16:18,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:18,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:18,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:16:18,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:18,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:18,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [189423890] [2019-12-27 23:16:18,894 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:18,894 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:18,904 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:18,904 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:18,904 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:18,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:18,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:18,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:18,905 INFO L87 Difference]: Start difference. First operand 144 states and 350 transitions. Second operand 14 states. [2019-12-27 23:16:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:19,353 INFO L93 Difference]: Finished difference Result 454 states and 1012 transitions. [2019-12-27 23:16:19,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:16:19,354 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:19,355 INFO L225 Difference]: With dead ends: 454 [2019-12-27 23:16:19,355 INFO L226 Difference]: Without dead ends: 452 [2019-12-27 23:16:19,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=494, Invalid=1228, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:16:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-12-27 23:16:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 143. [2019-12-27 23:16:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:16:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 346 transitions. [2019-12-27 23:16:19,359 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 346 transitions. Word has length 19 [2019-12-27 23:16:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:19,359 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 346 transitions. [2019-12-27 23:16:19,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 346 transitions. [2019-12-27 23:16:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:19,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:19,360 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:19,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:19,562 INFO L410 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:19,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1712160260, now seen corresponding path program 252 times [2019-12-27 23:16:19,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:19,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129958605] [2019-12-27 23:16:19,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:19,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129958605] [2019-12-27 23:16:19,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160081732] [2019-12-27 23:16:19,647 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:19,715 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:16:19,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:19,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:16:19,717 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:16:19,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:19,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:16:19,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2047730252] [2019-12-27 23:16:19,768 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:19,768 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:19,770 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:19,770 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:19,770 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:16:19,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:19,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:19,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:16:19,771 INFO L87 Difference]: Start difference. First operand 143 states and 346 transitions. Second operand 14 states. [2019-12-27 23:16:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:20,212 INFO L93 Difference]: Finished difference Result 459 states and 1016 transitions. [2019-12-27 23:16:20,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:16:20,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:20,213 INFO L225 Difference]: With dead ends: 459 [2019-12-27 23:16:20,213 INFO L226 Difference]: Without dead ends: 457 [2019-12-27 23:16:20,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 23:16:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2019-12-27 23:16:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 137. [2019-12-27 23:16:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 23:16:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 327 transitions. [2019-12-27 23:16:20,217 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 327 transitions. Word has length 19 [2019-12-27 23:16:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:20,217 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 327 transitions. [2019-12-27 23:16:20,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 327 transitions. [2019-12-27 23:16:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:20,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:20,218 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:20,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:20,419 INFO L410 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:20,419 INFO L82 PathProgramCache]: Analyzing trace with hash -360855012, now seen corresponding path program 253 times [2019-12-27 23:16:20,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:20,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305411175] [2019-12-27 23:16:20,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:20,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305411175] [2019-12-27 23:16:20,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717915098] [2019-12-27 23:16:20,494 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:20,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:20,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:16:20,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:20,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:20,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1358001001] [2019-12-27 23:16:20,594 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:20,595 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:20,597 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 23:16:20,597 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:20,750 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:16:20,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 23:16:20,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 23:16:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:16:20,751 INFO L87 Difference]: Start difference. First operand 137 states and 327 transitions. Second operand 22 states. [2019-12-27 23:16:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:21,856 INFO L93 Difference]: Finished difference Result 520 states and 1141 transitions. [2019-12-27 23:16:21,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-12-27 23:16:21,857 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2019-12-27 23:16:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:21,858 INFO L225 Difference]: With dead ends: 520 [2019-12-27 23:16:21,858 INFO L226 Difference]: Without dead ends: 518 [2019-12-27 23:16:21,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1260, Invalid=3162, Unknown=0, NotChecked=0, Total=4422 [2019-12-27 23:16:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2019-12-27 23:16:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 143. [2019-12-27 23:16:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:16:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-27 23:16:21,863 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 19 [2019-12-27 23:16:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:21,863 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-27 23:16:21,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 23:16:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-27 23:16:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:21,863 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:21,863 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:22,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:22,067 INFO L410 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:22,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:22,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1777072695, now seen corresponding path program 254 times [2019-12-27 23:16:22,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:22,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102733354] [2019-12-27 23:16:22,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:22,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102733354] [2019-12-27 23:16:22,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911388987] [2019-12-27 23:16:22,153 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:22,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:22,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:22,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:22,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:16:22,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:22,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:22,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [287876720] [2019-12-27 23:16:22,291 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:22,292 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:22,295 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 23:16:22,295 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:22,405 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:16:22,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 23:16:22,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:22,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 23:16:22,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:16:22,406 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 20 states. [2019-12-27 23:16:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:23,181 INFO L93 Difference]: Finished difference Result 475 states and 1060 transitions. [2019-12-27 23:16:23,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 23:16:23,183 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-12-27 23:16:23,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:23,184 INFO L225 Difference]: With dead ends: 475 [2019-12-27 23:16:23,184 INFO L226 Difference]: Without dead ends: 473 [2019-12-27 23:16:23,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2019-12-27 23:16:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2019-12-27 23:16:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 143. [2019-12-27 23:16:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:16:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-27 23:16:23,189 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 19 [2019-12-27 23:16:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:23,189 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-27 23:16:23,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 23:16:23,189 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-27 23:16:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:23,190 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:23,190 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:23,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:23,394 INFO L410 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:23,394 INFO L82 PathProgramCache]: Analyzing trace with hash 728713398, now seen corresponding path program 255 times [2019-12-27 23:16:23,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:23,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678961525] [2019-12-27 23:16:23,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:23,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678961525] [2019-12-27 23:16:23,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047803257] [2019-12-27 23:16:23,473 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:23,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:16:23,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:23,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:23,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-12-27 23:16:23,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:23,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:23,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [306515248] [2019-12-27 23:16:23,568 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:23,569 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:23,571 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 23:16:23,571 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:23,628 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:16:23,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:16:23,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:23,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:16:23,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:16:23,629 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 18 states. [2019-12-27 23:16:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:24,094 INFO L93 Difference]: Finished difference Result 407 states and 917 transitions. [2019-12-27 23:16:24,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:16:24,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:16:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:24,096 INFO L225 Difference]: With dead ends: 407 [2019-12-27 23:16:24,096 INFO L226 Difference]: Without dead ends: 405 [2019-12-27 23:16:24,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:16:24,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2019-12-27 23:16:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 143. [2019-12-27 23:16:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:16:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 348 transitions. [2019-12-27 23:16:24,100 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 348 transitions. Word has length 19 [2019-12-27 23:16:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:24,100 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 348 transitions. [2019-12-27 23:16:24,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:16:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 348 transitions. [2019-12-27 23:16:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:24,100 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:24,100 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:24,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:24,301 INFO L410 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:24,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1431805213, now seen corresponding path program 256 times [2019-12-27 23:16:24,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:24,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36944822] [2019-12-27 23:16:24,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:24,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36944822] [2019-12-27 23:16:24,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813435625] [2019-12-27 23:16:24,400 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:24,506 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:24,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:24,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:16:24,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-27 23:16:24,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:24,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 23:16:24,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [593041923] [2019-12-27 23:16:24,548 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:24,549 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:24,553 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 47 transitions. [2019-12-27 23:16:24,553 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:24,591 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 11 times. [2019-12-27 23:16:24,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:24,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:24,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:24,591 INFO L87 Difference]: Start difference. First operand 143 states and 348 transitions. Second operand 16 states. [2019-12-27 23:16:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:24,872 INFO L93 Difference]: Finished difference Result 334 states and 763 transitions. [2019-12-27 23:16:24,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:16:24,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:24,873 INFO L225 Difference]: With dead ends: 334 [2019-12-27 23:16:24,873 INFO L226 Difference]: Without dead ends: 332 [2019-12-27 23:16:24,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:16:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-12-27 23:16:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 145. [2019-12-27 23:16:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:16:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:16:24,877 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:16:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:24,878 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:16:24,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:16:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:24,878 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:24,878 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:25,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:25,080 INFO L410 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:25,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1874205085, now seen corresponding path program 257 times [2019-12-27 23:16:25,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:25,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562755672] [2019-12-27 23:16:25,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:25,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562755672] [2019-12-27 23:16:25,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266375236] [2019-12-27 23:16:25,162 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:25,225 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-27 23:16:25,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:25,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:16:25,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-12-27 23:16:25,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:25,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 23:16:25,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1621289305] [2019-12-27 23:16:25,243 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:25,252 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:25,254 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 23:16:25,254 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:25,255 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:16:25,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:25,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:16:25,255 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 23:16:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:25,451 INFO L93 Difference]: Finished difference Result 345 states and 795 transitions. [2019-12-27 23:16:25,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:16:25,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:25,453 INFO L225 Difference]: With dead ends: 345 [2019-12-27 23:16:25,453 INFO L226 Difference]: Without dead ends: 343 [2019-12-27 23:16:25,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:16:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-12-27 23:16:25,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 145. [2019-12-27 23:16:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:16:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:16:25,457 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:16:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:25,457 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:16:25,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:16:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:25,457 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:25,458 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:25,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:25,658 INFO L410 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:25,659 INFO L82 PathProgramCache]: Analyzing trace with hash -955865955, now seen corresponding path program 258 times [2019-12-27 23:16:25,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:25,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779010740] [2019-12-27 23:16:25,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:25,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779010740] [2019-12-27 23:16:25,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509728715] [2019-12-27 23:16:25,743 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:25,816 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 23:16:25,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:25,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 23:16:25,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:25,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:25,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2019-12-27 23:16:25,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1477992675] [2019-12-27 23:16:25,925 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:25,926 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:25,929 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 23:16:25,929 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:25,930 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:16:25,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:25,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:16:25,930 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 23:16:26,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:26,178 INFO L93 Difference]: Finished difference Result 364 states and 843 transitions. [2019-12-27 23:16:26,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:16:26,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:26,179 INFO L225 Difference]: With dead ends: 364 [2019-12-27 23:16:26,179 INFO L226 Difference]: Without dead ends: 362 [2019-12-27 23:16:26,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:16:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2019-12-27 23:16:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 145. [2019-12-27 23:16:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:16:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:16:26,184 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:16:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:26,184 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:16:26,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:16:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:26,185 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:26,185 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:26,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:26,386 INFO L410 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:26,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:26,386 INFO L82 PathProgramCache]: Analyzing trace with hash 784198710, now seen corresponding path program 259 times [2019-12-27 23:16:26,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:26,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817825285] [2019-12-27 23:16:26,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:26,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817825285] [2019-12-27 23:16:26,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945403292] [2019-12-27 23:16:26,469 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:26,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 23:16:26,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:16:26,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:26,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2019-12-27 23:16:26,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2114944066] [2019-12-27 23:16:26,617 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:26,617 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:26,619 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 23:16:26,619 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:26,656 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:16:26,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:26,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:26,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:16:26,657 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 16 states. [2019-12-27 23:16:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:26,997 INFO L93 Difference]: Finished difference Result 419 states and 958 transitions. [2019-12-27 23:16:26,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:16:26,997 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:26,998 INFO L225 Difference]: With dead ends: 419 [2019-12-27 23:16:26,998 INFO L226 Difference]: Without dead ends: 417 [2019-12-27 23:16:26,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:16:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-12-27 23:16:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 147. [2019-12-27 23:16:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 23:16:27,003 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 23:16:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:27,003 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 23:16:27,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 23:16:27,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:27,004 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:27,004 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:27,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:27,204 INFO L410 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1742843299, now seen corresponding path program 260 times [2019-12-27 23:16:27,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:27,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356530980] [2019-12-27 23:16:27,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:27,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356530980] [2019-12-27 23:16:27,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869031957] [2019-12-27 23:16:27,285 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:27,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:27,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:27,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:16:27,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 23:16:27,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:27,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 23:16:27,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [320813823] [2019-12-27 23:16:27,408 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:27,409 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:27,412 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 23:16:27,412 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:27,413 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:16:27,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:27,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:27,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:27,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:16:27,414 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 14 states. [2019-12-27 23:16:27,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:27,610 INFO L93 Difference]: Finished difference Result 379 states and 875 transitions. [2019-12-27 23:16:27,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:16:27,611 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:27,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:27,612 INFO L225 Difference]: With dead ends: 379 [2019-12-27 23:16:27,612 INFO L226 Difference]: Without dead ends: 377 [2019-12-27 23:16:27,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:16:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-12-27 23:16:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 147. [2019-12-27 23:16:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 23:16:27,615 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 23:16:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:27,615 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 23:16:27,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 23:16:27,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:27,616 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:27,616 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:27,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:27,817 INFO L410 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:27,817 INFO L82 PathProgramCache]: Analyzing trace with hash 341798838, now seen corresponding path program 261 times [2019-12-27 23:16:27,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:27,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454089159] [2019-12-27 23:16:27,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:27,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454089159] [2019-12-27 23:16:27,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845688235] [2019-12-27 23:16:27,899 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:27,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:16:27,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:27,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:27,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:16:27,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:27,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:27,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1982953240] [2019-12-27 23:16:27,995 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:27,996 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:27,997 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:16:27,997 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:27,998 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:16:27,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:27,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:27,998 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 14 states. [2019-12-27 23:16:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:28,228 INFO L93 Difference]: Finished difference Result 413 states and 943 transitions. [2019-12-27 23:16:28,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 23:16:28,229 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:28,230 INFO L225 Difference]: With dead ends: 413 [2019-12-27 23:16:28,230 INFO L226 Difference]: Without dead ends: 411 [2019-12-27 23:16:28,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2019-12-27 23:16:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2019-12-27 23:16:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 145. [2019-12-27 23:16:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:16:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:16:28,234 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:16:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:28,234 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:16:28,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:16:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:28,234 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:28,234 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:28,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:28,435 INFO L410 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:28,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1455160336, now seen corresponding path program 262 times [2019-12-27 23:16:28,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:28,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234826489] [2019-12-27 23:16:28,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:28,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234826489] [2019-12-27 23:16:28,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088301267] [2019-12-27 23:16:28,515 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:28,586 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:28,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:28,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:28,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 23:16:28,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:28,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:28,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [509774128] [2019-12-27 23:16:28,615 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:28,616 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:28,618 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:16:28,618 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:28,650 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:16:28,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:28,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:28,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:16:28,651 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 16 states. [2019-12-27 23:16:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:28,982 INFO L93 Difference]: Finished difference Result 424 states and 974 transitions. [2019-12-27 23:16:28,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:16:28,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:28,983 INFO L225 Difference]: With dead ends: 424 [2019-12-27 23:16:28,984 INFO L226 Difference]: Without dead ends: 422 [2019-12-27 23:16:28,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=879, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:16:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-12-27 23:16:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 148. [2019-12-27 23:16:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:16:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 23:16:28,987 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 23:16:28,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:28,987 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 23:16:28,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 23:16:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:28,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:28,988 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:29,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:29,189 INFO L410 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:29,190 INFO L82 PathProgramCache]: Analyzing trace with hash -496515747, now seen corresponding path program 263 times [2019-12-27 23:16:29,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:29,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262879327] [2019-12-27 23:16:29,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:29,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262879327] [2019-12-27 23:16:29,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740341846] [2019-12-27 23:16:29,266 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:29,330 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-27 23:16:29,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:29,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:16:29,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-27 23:16:29,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:29,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 23:16:29,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1463909024] [2019-12-27 23:16:29,350 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:29,351 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:29,353 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 23:16:29,353 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:29,354 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:16:29,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:29,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:29,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:29,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:16:29,354 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 23:16:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:29,547 INFO L93 Difference]: Finished difference Result 382 states and 889 transitions. [2019-12-27 23:16:29,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:16:29,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:29,549 INFO L225 Difference]: With dead ends: 382 [2019-12-27 23:16:29,549 INFO L226 Difference]: Without dead ends: 380 [2019-12-27 23:16:29,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:16:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-12-27 23:16:29,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 148. [2019-12-27 23:16:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:16:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 23:16:29,552 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 23:16:29,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:29,553 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 23:16:29,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:29,553 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 23:16:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:29,553 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:29,553 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:29,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:29,754 INFO L410 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:29,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1897560208, now seen corresponding path program 264 times [2019-12-27 23:16:29,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:29,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665930632] [2019-12-27 23:16:29,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:29,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665930632] [2019-12-27 23:16:29,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645861604] [2019-12-27 23:16:29,842 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:29,914 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:16:29,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:29,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 23:16:29,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:30,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:30,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2019-12-27 23:16:30,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [720346125] [2019-12-27 23:16:30,000 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:30,001 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:30,004 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:30,004 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:30,005 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:16:30,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:30,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:30,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:30,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:16:30,005 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 23:16:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:30,285 INFO L93 Difference]: Finished difference Result 430 states and 999 transitions. [2019-12-27 23:16:30,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:16:30,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:30,286 INFO L225 Difference]: With dead ends: 430 [2019-12-27 23:16:30,287 INFO L226 Difference]: Without dead ends: 428 [2019-12-27 23:16:30,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:16:30,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-12-27 23:16:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 147. [2019-12-27 23:16:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 23:16:30,291 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 23:16:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:30,291 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 23:16:30,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:30,291 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 23:16:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:30,291 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:30,291 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:30,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:30,492 INFO L410 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:30,493 INFO L82 PathProgramCache]: Analyzing trace with hash -979221078, now seen corresponding path program 265 times [2019-12-27 23:16:30,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:30,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328323769] [2019-12-27 23:16:30,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:30,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328323769] [2019-12-27 23:16:30,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958209417] [2019-12-27 23:16:30,576 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:30,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:30,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 23:16:30,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:30,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:30,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [124035126] [2019-12-27 23:16:30,677 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:30,678 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:30,680 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:16:30,680 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:30,681 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:16:30,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:30,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:30,681 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 14 states. [2019-12-27 23:16:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:30,924 INFO L93 Difference]: Finished difference Result 433 states and 1002 transitions. [2019-12-27 23:16:30,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 23:16:30,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:30,925 INFO L225 Difference]: With dead ends: 433 [2019-12-27 23:16:30,926 INFO L226 Difference]: Without dead ends: 431 [2019-12-27 23:16:30,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2019-12-27 23:16:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-12-27 23:16:30,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 145. [2019-12-27 23:16:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:16:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:16:30,929 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:16:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:30,929 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:16:30,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:16:30,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:30,930 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:30,930 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:31,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:31,131 INFO L410 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:31,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash 4704585, now seen corresponding path program 266 times [2019-12-27 23:16:31,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:31,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570344358] [2019-12-27 23:16:31,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:31,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570344358] [2019-12-27 23:16:31,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145501515] [2019-12-27 23:16:31,208 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:31,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:31,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:31,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:31,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:16:31,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:31,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:31,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1396632929] [2019-12-27 23:16:31,331 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:31,331 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:31,334 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 23:16:31,334 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:31,400 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:16:31,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:16:31,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:16:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:16:31,401 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 18 states. [2019-12-27 23:16:31,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:31,943 INFO L93 Difference]: Finished difference Result 477 states and 1080 transitions. [2019-12-27 23:16:31,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:16:31,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:16:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:31,945 INFO L225 Difference]: With dead ends: 477 [2019-12-27 23:16:31,945 INFO L226 Difference]: Without dead ends: 475 [2019-12-27 23:16:31,945 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=614, Invalid=1548, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 23:16:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2019-12-27 23:16:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 147. [2019-12-27 23:16:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 23:16:31,949 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 23:16:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:31,949 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 23:16:31,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:16:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 23:16:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:31,949 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:31,949 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:32,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:32,150 INFO L410 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2139153270, now seen corresponding path program 267 times [2019-12-27 23:16:32,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:32,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607714450] [2019-12-27 23:16:32,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:32,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607714450] [2019-12-27 23:16:32,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856016388] [2019-12-27 23:16:32,232 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:32,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:16:32,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:32,303 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 23:16:32,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:16:32,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:32,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2019-12-27 23:16:32,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [722640906] [2019-12-27 23:16:32,386 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:32,387 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:32,389 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:32,389 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:32,425 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:16:32,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:32,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:32,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:16:32,426 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 16 states. [2019-12-27 23:16:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:32,815 INFO L93 Difference]: Finished difference Result 421 states and 964 transitions. [2019-12-27 23:16:32,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:16:32,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:32,817 INFO L225 Difference]: With dead ends: 421 [2019-12-27 23:16:32,817 INFO L226 Difference]: Without dead ends: 419 [2019-12-27 23:16:32,817 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:16:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-12-27 23:16:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 149. [2019-12-27 23:16:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:16:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 369 transitions. [2019-12-27 23:16:32,821 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 369 transitions. Word has length 19 [2019-12-27 23:16:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:32,822 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 369 transitions. [2019-12-27 23:16:32,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 369 transitions. [2019-12-27 23:16:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:32,822 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:32,822 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:33,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:33,023 INFO L410 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1197169437, now seen corresponding path program 268 times [2019-12-27 23:16:33,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:33,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204024238] [2019-12-27 23:16:33,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:33,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204024238] [2019-12-27 23:16:33,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078797806] [2019-12-27 23:16:33,105 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:33,174 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:33,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:33,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:16:33,176 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 23:16:33,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:33,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 23:16:33,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [370445159] [2019-12-27 23:16:33,191 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:33,192 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:33,194 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 23:16:33,194 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:33,195 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:33,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:33,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:33,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:33,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:16:33,196 INFO L87 Difference]: Start difference. First operand 149 states and 369 transitions. Second operand 14 states. [2019-12-27 23:16:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:33,390 INFO L93 Difference]: Finished difference Result 381 states and 883 transitions. [2019-12-27 23:16:33,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:16:33,391 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:33,392 INFO L225 Difference]: With dead ends: 381 [2019-12-27 23:16:33,392 INFO L226 Difference]: Without dead ends: 379 [2019-12-27 23:16:33,392 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:16:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-12-27 23:16:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 149. [2019-12-27 23:16:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:16:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 369 transitions. [2019-12-27 23:16:33,396 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 369 transitions. Word has length 19 [2019-12-27 23:16:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:33,396 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 369 transitions. [2019-12-27 23:16:33,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 369 transitions. [2019-12-27 23:16:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:33,396 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:33,396 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:33,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:33,597 INFO L410 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1696753398, now seen corresponding path program 269 times [2019-12-27 23:16:33,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:33,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947045946] [2019-12-27 23:16:33,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:33,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947045946] [2019-12-27 23:16:33,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092481749] [2019-12-27 23:16:33,678 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:33,742 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:16:33,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:33,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:33,743 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-27 23:16:33,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:33,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:33,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1967317014] [2019-12-27 23:16:33,772 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:33,773 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:33,775 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:33,775 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:33,775 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:33,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:33,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:33,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:33,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:33,776 INFO L87 Difference]: Start difference. First operand 149 states and 369 transitions. Second operand 14 states. [2019-12-27 23:16:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:34,047 INFO L93 Difference]: Finished difference Result 429 states and 991 transitions. [2019-12-27 23:16:34,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:16:34,048 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:34,049 INFO L225 Difference]: With dead ends: 429 [2019-12-27 23:16:34,049 INFO L226 Difference]: Without dead ends: 427 [2019-12-27 23:16:34,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:16:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2019-12-27 23:16:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 148. [2019-12-27 23:16:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:16:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 23:16:34,053 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 23:16:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:34,053 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 23:16:34,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 23:16:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:34,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:34,053 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:34,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:34,254 INFO L410 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1679874768, now seen corresponding path program 270 times [2019-12-27 23:16:34,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:34,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325733460] [2019-12-27 23:16:34,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:34,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325733460] [2019-12-27 23:16:34,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120250315] [2019-12-27 23:16:34,350 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:34,417 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:16:34,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:34,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:34,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:16:34,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:34,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:34,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1032838871] [2019-12-27 23:16:34,445 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:34,446 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:34,448 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:34,448 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:34,448 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:34,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:34,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:34,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:34,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:34,449 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 23:16:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:34,710 INFO L93 Difference]: Finished difference Result 440 states and 1017 transitions. [2019-12-27 23:16:34,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:16:34,711 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:34,712 INFO L225 Difference]: With dead ends: 440 [2019-12-27 23:16:34,712 INFO L226 Difference]: Without dead ends: 438 [2019-12-27 23:16:34,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:16:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-12-27 23:16:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 147. [2019-12-27 23:16:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 361 transitions. [2019-12-27 23:16:34,716 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 361 transitions. Word has length 19 [2019-12-27 23:16:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:34,716 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 361 transitions. [2019-12-27 23:16:34,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 361 transitions. [2019-12-27 23:16:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:34,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:34,716 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:34,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:34,917 INFO L410 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:34,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:34,918 INFO L82 PathProgramCache]: Analyzing trace with hash 60189897, now seen corresponding path program 271 times [2019-12-27 23:16:34,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:34,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764596024] [2019-12-27 23:16:34,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:34,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764596024] [2019-12-27 23:16:34,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959146034] [2019-12-27 23:16:34,995 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:35,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:35,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:16:35,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:35,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:35,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [637398751] [2019-12-27 23:16:35,110 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:35,110 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:35,112 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:35,112 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:35,144 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:16:35,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:35,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:35,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:35,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:16:35,145 INFO L87 Difference]: Start difference. First operand 147 states and 361 transitions. Second operand 16 states. [2019-12-27 23:16:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:35,528 INFO L93 Difference]: Finished difference Result 465 states and 1058 transitions. [2019-12-27 23:16:35,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:16:35,529 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:35,530 INFO L225 Difference]: With dead ends: 465 [2019-12-27 23:16:35,530 INFO L226 Difference]: Without dead ends: 463 [2019-12-27 23:16:35,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:16:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2019-12-27 23:16:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 149. [2019-12-27 23:16:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:16:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 368 transitions. [2019-12-27 23:16:35,535 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 368 transitions. Word has length 19 [2019-12-27 23:16:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:35,535 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 368 transitions. [2019-12-27 23:16:35,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 368 transitions. [2019-12-27 23:16:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:35,536 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:35,536 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:35,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:35,736 INFO L410 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1018834486, now seen corresponding path program 272 times [2019-12-27 23:16:35,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:35,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954563635] [2019-12-27 23:16:35,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:35,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954563635] [2019-12-27 23:16:35,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782423976] [2019-12-27 23:16:35,819 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:35,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:35,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:35,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:35,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 23:16:35,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:35,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:35,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [578524029] [2019-12-27 23:16:35,913 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:35,914 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:35,916 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:16:35,916 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:35,916 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:35,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:35,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:35,917 INFO L87 Difference]: Start difference. First operand 149 states and 368 transitions. Second operand 14 states. [2019-12-27 23:16:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:36,174 INFO L93 Difference]: Finished difference Result 437 states and 999 transitions. [2019-12-27 23:16:36,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 23:16:36,174 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:36,175 INFO L225 Difference]: With dead ends: 437 [2019-12-27 23:16:36,175 INFO L226 Difference]: Without dead ends: 435 [2019-12-27 23:16:36,175 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2019-12-27 23:16:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2019-12-27 23:16:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 149. [2019-12-27 23:16:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:16:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 368 transitions. [2019-12-27 23:16:36,178 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 368 transitions. Word has length 19 [2019-12-27 23:16:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:36,178 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 368 transitions. [2019-12-27 23:16:36,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 368 transitions. [2019-12-27 23:16:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:36,179 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:36,179 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:36,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:36,380 INFO L410 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash -382209975, now seen corresponding path program 273 times [2019-12-27 23:16:36,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:36,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248713574] [2019-12-27 23:16:36,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:36,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248713574] [2019-12-27 23:16:36,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422595178] [2019-12-27 23:16:36,463 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:36,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:16:36,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:36,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:36,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:16:36,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:36,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:36,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1410940086] [2019-12-27 23:16:36,592 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:36,593 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:36,595 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:36,595 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:36,595 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:36,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:36,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:36,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:36,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:36,596 INFO L87 Difference]: Start difference. First operand 149 states and 368 transitions. Second operand 14 states. [2019-12-27 23:16:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:36,894 INFO L93 Difference]: Finished difference Result 459 states and 1037 transitions. [2019-12-27 23:16:36,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:16:36,895 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:36,896 INFO L225 Difference]: With dead ends: 459 [2019-12-27 23:16:36,896 INFO L226 Difference]: Without dead ends: 457 [2019-12-27 23:16:36,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=930, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:16:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2019-12-27 23:16:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 145. [2019-12-27 23:16:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:16:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:16:36,900 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:16:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:36,900 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:16:36,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:16:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:36,901 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:36,901 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:37,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:37,102 INFO L410 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:37,102 INFO L82 PathProgramCache]: Analyzing trace with hash -240723325, now seen corresponding path program 274 times [2019-12-27 23:16:37,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:37,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137712924] [2019-12-27 23:16:37,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:37,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137712924] [2019-12-27 23:16:37,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046313943] [2019-12-27 23:16:37,183 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:37,246 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:37,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:37,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:37,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:16:37,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:37,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:37,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [817712900] [2019-12-27 23:16:37,285 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:37,286 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:37,288 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:16:37,288 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:37,351 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:16:37,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:16:37,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:37,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:16:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:16:37,352 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 18 states. [2019-12-27 23:16:37,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:37,883 INFO L93 Difference]: Finished difference Result 462 states and 1052 transitions. [2019-12-27 23:16:37,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 23:16:37,884 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:16:37,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:37,884 INFO L225 Difference]: With dead ends: 462 [2019-12-27 23:16:37,885 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 23:16:37,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=590, Invalid=1480, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:16:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 23:16:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 146. [2019-12-27 23:16:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:16:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:16:37,889 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:16:37,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:37,889 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:16:37,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:16:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:16:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:37,890 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:37,890 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:38,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:38,091 INFO L410 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:38,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:38,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1893725360, now seen corresponding path program 275 times [2019-12-27 23:16:38,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:38,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15766756] [2019-12-27 23:16:38,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:38,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15766756] [2019-12-27 23:16:38,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402019080] [2019-12-27 23:16:38,184 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:38,246 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:16:38,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:38,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:16:38,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:38,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:38,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 23:16:38,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1593976524] [2019-12-27 23:16:38,253 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:38,254 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:38,256 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:38,256 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:38,290 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:16:38,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:38,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:38,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:38,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:38,291 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 16 states. [2019-12-27 23:16:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:38,636 INFO L93 Difference]: Finished difference Result 409 states and 944 transitions. [2019-12-27 23:16:38,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:16:38,636 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:38,637 INFO L225 Difference]: With dead ends: 409 [2019-12-27 23:16:38,637 INFO L226 Difference]: Without dead ends: 407 [2019-12-27 23:16:38,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=432, Invalid=828, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:16:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2019-12-27 23:16:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 148. [2019-12-27 23:16:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:16:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:16:38,641 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:16:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:38,641 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:16:38,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:16:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:38,642 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:38,642 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:38,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:38,843 INFO L410 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:38,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1442597347, now seen corresponding path program 276 times [2019-12-27 23:16:38,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:38,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689234332] [2019-12-27 23:16:38,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:38,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689234332] [2019-12-27 23:16:38,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028020280] [2019-12-27 23:16:38,934 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:39,008 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 23:16:39,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:39,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:16:39,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-12-27 23:16:39,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:39,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 23:16:39,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [149901730] [2019-12-27 23:16:39,026 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:39,027 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:39,030 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 23:16:39,030 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:39,030 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:16:39,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:39,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:39,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:39,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:16:39,031 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 23:16:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:39,233 INFO L93 Difference]: Finished difference Result 365 states and 854 transitions. [2019-12-27 23:16:39,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:16:39,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:39,235 INFO L225 Difference]: With dead ends: 365 [2019-12-27 23:16:39,235 INFO L226 Difference]: Without dead ends: 363 [2019-12-27 23:16:39,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:16:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-12-27 23:16:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 148. [2019-12-27 23:16:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:16:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:16:39,238 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:16:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:39,238 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:16:39,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:16:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:39,239 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:39,239 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:39,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:39,440 INFO L410 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:39,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1451325488, now seen corresponding path program 277 times [2019-12-27 23:16:39,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:39,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597192459] [2019-12-27 23:16:39,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:39,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597192459] [2019-12-27 23:16:39,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644703343] [2019-12-27 23:16:39,530 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:39,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:39,592 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:16:39,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:39,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:39,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [151888529] [2019-12-27 23:16:39,619 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:39,620 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:39,622 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:39,622 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:39,622 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:16:39,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:39,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:39,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:39,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:39,623 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 23:16:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:39,905 INFO L93 Difference]: Finished difference Result 408 states and 953 transitions. [2019-12-27 23:16:39,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:16:39,905 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:39,906 INFO L225 Difference]: With dead ends: 408 [2019-12-27 23:16:39,906 INFO L226 Difference]: Without dead ends: 406 [2019-12-27 23:16:39,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:16:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2019-12-27 23:16:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 147. [2019-12-27 23:16:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:16:39,910 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:16:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:39,910 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:16:39,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:16:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:39,911 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:39,911 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:40,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:40,112 INFO L410 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:40,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1925302678, now seen corresponding path program 278 times [2019-12-27 23:16:40,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:40,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207736962] [2019-12-27 23:16:40,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:40,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207736962] [2019-12-27 23:16:40,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041105853] [2019-12-27 23:16:40,193 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:40,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:40,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:40,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:40,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:16:40,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:40,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:40,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1575643470] [2019-12-27 23:16:40,286 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:40,287 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:40,288 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:40,288 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:40,289 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:16:40,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:40,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:40,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:40,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:40,289 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:16:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:40,574 INFO L93 Difference]: Finished difference Result 423 states and 983 transitions. [2019-12-27 23:16:40,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:16:40,574 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:40,575 INFO L225 Difference]: With dead ends: 423 [2019-12-27 23:16:40,575 INFO L226 Difference]: Without dead ends: 421 [2019-12-27 23:16:40,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:16:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2019-12-27 23:16:40,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 146. [2019-12-27 23:16:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:16:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:16:40,579 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:16:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:40,579 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:16:40,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:16:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:40,580 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:40,580 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:40,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:40,781 INFO L410 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:40,781 INFO L82 PathProgramCache]: Analyzing trace with hash -185238013, now seen corresponding path program 279 times [2019-12-27 23:16:40,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:40,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915038041] [2019-12-27 23:16:40,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:40,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915038041] [2019-12-27 23:16:40,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762329343] [2019-12-27 23:16:40,861 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:40,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:16:40,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:40,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:40,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:16:40,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:40,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:40,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1394990924] [2019-12-27 23:16:40,987 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:40,987 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:40,990 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:40,990 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:41,020 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:16:41,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:41,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:41,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:41,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:16:41,021 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 16 states. [2019-12-27 23:16:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:41,435 INFO L93 Difference]: Finished difference Result 455 states and 1047 transitions. [2019-12-27 23:16:41,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:16:41,436 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:41,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:41,437 INFO L225 Difference]: With dead ends: 455 [2019-12-27 23:16:41,437 INFO L226 Difference]: Without dead ends: 453 [2019-12-27 23:16:41,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=479, Invalid=1243, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:16:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-12-27 23:16:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 148. [2019-12-27 23:16:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:16:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 23:16:41,441 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 23:16:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:41,441 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 23:16:41,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 23:16:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:41,441 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:41,441 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:41,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:41,642 INFO L410 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash 773406576, now seen corresponding path program 280 times [2019-12-27 23:16:41,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:41,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620599395] [2019-12-27 23:16:41,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:41,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620599395] [2019-12-27 23:16:41,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321674073] [2019-12-27 23:16:41,724 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:41,786 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:41,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:41,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:41,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:16:41,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:41,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:41,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [704612] [2019-12-27 23:16:41,813 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:41,814 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:41,816 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:41,816 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:41,816 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:16:41,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:41,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:41,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:41,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:41,817 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 23:16:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:42,110 INFO L93 Difference]: Finished difference Result 438 states and 1018 transitions. [2019-12-27 23:16:42,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:16:42,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:42,111 INFO L225 Difference]: With dead ends: 438 [2019-12-27 23:16:42,111 INFO L226 Difference]: Without dead ends: 436 [2019-12-27 23:16:42,112 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:16:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2019-12-27 23:16:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 148. [2019-12-27 23:16:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:16:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 365 transitions. [2019-12-27 23:16:42,115 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 365 transitions. Word has length 19 [2019-12-27 23:16:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:42,115 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 365 transitions. [2019-12-27 23:16:42,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 365 transitions. [2019-12-27 23:16:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:42,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:42,116 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:42,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:42,316 INFO L410 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash -627637885, now seen corresponding path program 281 times [2019-12-27 23:16:42,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:42,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366352973] [2019-12-27 23:16:42,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:42,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366352973] [2019-12-27 23:16:42,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642943220] [2019-12-27 23:16:42,459 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:42,523 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:16:42,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:42,524 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:42,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:16:42,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:42,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:42,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2074910643] [2019-12-27 23:16:42,574 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:42,575 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:42,577 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:42,577 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:42,578 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:16:42,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:42,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:42,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:42,579 INFO L87 Difference]: Start difference. First operand 148 states and 365 transitions. Second operand 14 states. [2019-12-27 23:16:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:42,883 INFO L93 Difference]: Finished difference Result 466 states and 1076 transitions. [2019-12-27 23:16:42,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:16:42,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:42,884 INFO L225 Difference]: With dead ends: 466 [2019-12-27 23:16:42,884 INFO L226 Difference]: Without dead ends: 464 [2019-12-27 23:16:42,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=338, Invalid=852, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:16:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-12-27 23:16:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 145. [2019-12-27 23:16:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:16:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:16:42,889 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:16:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:42,889 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:16:42,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:16:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:42,889 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:42,889 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:43,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:43,090 INFO L410 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:43,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1870370237, now seen corresponding path program 282 times [2019-12-27 23:16:43,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:43,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342865344] [2019-12-27 23:16:43,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:43,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342865344] [2019-12-27 23:16:43,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660300641] [2019-12-27 23:16:43,187 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:43,261 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:16:43,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:43,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:43,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:16:43,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:43,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:43,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1305147552] [2019-12-27 23:16:43,300 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:43,301 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:43,303 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:43,303 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:43,331 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:16:43,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:43,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:43,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:43,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:43,332 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 16 states. [2019-12-27 23:16:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:43,745 INFO L93 Difference]: Finished difference Result 449 states and 1033 transitions. [2019-12-27 23:16:43,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:16:43,745 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:43,746 INFO L225 Difference]: With dead ends: 449 [2019-12-27 23:16:43,746 INFO L226 Difference]: Without dead ends: 447 [2019-12-27 23:16:43,747 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:16:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-12-27 23:16:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 146. [2019-12-27 23:16:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:16:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:16:43,751 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:16:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:43,751 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:16:43,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:16:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:43,751 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:43,751 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:43,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:43,952 INFO L410 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1465952470, now seen corresponding path program 283 times [2019-12-27 23:16:43,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:43,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082933010] [2019-12-27 23:16:43,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:44,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082933010] [2019-12-27 23:16:44,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350489886] [2019-12-27 23:16:44,036 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:44,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:44,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 23:16:44,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:44,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:44,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [149389976] [2019-12-27 23:16:44,134 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:44,135 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:44,136 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:16:44,137 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:44,137 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:16:44,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:44,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:44,138 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 23:16:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:44,418 INFO L93 Difference]: Finished difference Result 418 states and 968 transitions. [2019-12-27 23:16:44,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 23:16:44,419 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:44,420 INFO L225 Difference]: With dead ends: 418 [2019-12-27 23:16:44,420 INFO L226 Difference]: Without dead ends: 416 [2019-12-27 23:16:44,420 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 23:16:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2019-12-27 23:16:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 146. [2019-12-27 23:16:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:16:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:16:44,424 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:16:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:44,424 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:16:44,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:16:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:44,425 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:44,425 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:44,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:44,626 INFO L410 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1427970365, now seen corresponding path program 284 times [2019-12-27 23:16:44,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:44,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645105226] [2019-12-27 23:16:44,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:44,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645105226] [2019-12-27 23:16:44,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14271116] [2019-12-27 23:16:44,705 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:44,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:44,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:44,768 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:44,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:16:44,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:44,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:44,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [399499576] [2019-12-27 23:16:44,807 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:44,808 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:44,810 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:44,810 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:44,810 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:16:44,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:44,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:44,811 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 23:16:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:45,131 INFO L93 Difference]: Finished difference Result 461 states and 1066 transitions. [2019-12-27 23:16:45,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:16:45,132 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:45,133 INFO L225 Difference]: With dead ends: 461 [2019-12-27 23:16:45,133 INFO L226 Difference]: Without dead ends: 459 [2019-12-27 23:16:45,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 23:16:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2019-12-27 23:16:45,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 145. [2019-12-27 23:16:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:16:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:16:45,136 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:16:45,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:45,136 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:16:45,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:16:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:45,137 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:45,137 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:45,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:45,338 INFO L410 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:45,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:45,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1948657801, now seen corresponding path program 285 times [2019-12-27 23:16:45,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:45,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609536322] [2019-12-27 23:16:45,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:45,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609536322] [2019-12-27 23:16:45,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254430749] [2019-12-27 23:16:45,417 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:45,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:16:45,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:45,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:45,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:16:45,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:45,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:45,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [590889267] [2019-12-27 23:16:45,542 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:45,543 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:45,545 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:45,545 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:45,546 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:16:45,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:45,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:45,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:45,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:45,546 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 23:16:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:45,887 INFO L93 Difference]: Finished difference Result 455 states and 1041 transitions. [2019-12-27 23:16:45,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:16:45,887 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:45,888 INFO L225 Difference]: With dead ends: 455 [2019-12-27 23:16:45,888 INFO L226 Difference]: Without dead ends: 453 [2019-12-27 23:16:45,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:16:45,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-12-27 23:16:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 139. [2019-12-27 23:16:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 23:16:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-27 23:16:45,893 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 19 [2019-12-27 23:16:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:45,893 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-27 23:16:45,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-27 23:16:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:45,893 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:45,894 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:46,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:46,094 INFO L410 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1764840036, now seen corresponding path program 286 times [2019-12-27 23:16:46,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:46,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038193231] [2019-12-27 23:16:46,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:46,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038193231] [2019-12-27 23:16:46,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131864368] [2019-12-27 23:16:46,175 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:46,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:46,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:46,238 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:16:46,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:16:46,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:46,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:16:46,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [571752931] [2019-12-27 23:16:46,286 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:46,287 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:46,288 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 39 transitions. [2019-12-27 23:16:46,288 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:46,407 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:16:46,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 23:16:46,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:46,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 23:16:46,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2019-12-27 23:16:46,408 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 20 states. [2019-12-27 23:16:47,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:47,253 INFO L93 Difference]: Finished difference Result 519 states and 1166 transitions. [2019-12-27 23:16:47,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-27 23:16:47,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-12-27 23:16:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:47,254 INFO L225 Difference]: With dead ends: 519 [2019-12-27 23:16:47,254 INFO L226 Difference]: Without dead ends: 517 [2019-12-27 23:16:47,255 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=894, Invalid=2412, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 23:16:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2019-12-27 23:16:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 146. [2019-12-27 23:16:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:16:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:16:47,259 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:16:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:47,259 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:16:47,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 23:16:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:16:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:47,260 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:47,260 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:47,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:47,460 INFO L410 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash 740946057, now seen corresponding path program 287 times [2019-12-27 23:16:47,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:47,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126760403] [2019-12-27 23:16:47,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:47,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126760403] [2019-12-27 23:16:47,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435016785] [2019-12-27 23:16:47,538 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:47,600 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:16:47,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:47,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:47,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:16:47,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:47,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:47,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [369610568] [2019-12-27 23:16:47,657 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:47,658 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:47,660 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:47,660 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:47,729 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:16:47,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:16:47,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:47,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:16:47,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:16:47,730 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 18 states. [2019-12-27 23:16:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:48,318 INFO L93 Difference]: Finished difference Result 469 states and 1061 transitions. [2019-12-27 23:16:48,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:16:48,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:16:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:48,320 INFO L225 Difference]: With dead ends: 469 [2019-12-27 23:16:48,320 INFO L226 Difference]: Without dead ends: 467 [2019-12-27 23:16:48,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=677, Invalid=1675, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 23:16:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2019-12-27 23:16:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 147. [2019-12-27 23:16:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:16:48,324 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:16:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:48,324 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:16:48,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:16:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:16:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:48,325 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:48,325 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:48,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:48,526 INFO L410 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:48,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1419572554, now seen corresponding path program 288 times [2019-12-27 23:16:48,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:48,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108122194] [2019-12-27 23:16:48,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:48,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108122194] [2019-12-27 23:16:48,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617980491] [2019-12-27 23:16:48,608 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:48,678 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:16:48,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:48,679 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:48,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:16:48,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:48,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:48,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [303353316] [2019-12-27 23:16:48,709 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:48,710 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:48,712 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:48,712 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:48,749 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:48,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:48,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:16:48,750 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 23:16:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:49,129 INFO L93 Difference]: Finished difference Result 421 states and 962 transitions. [2019-12-27 23:16:49,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:16:49,129 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:49,130 INFO L225 Difference]: With dead ends: 421 [2019-12-27 23:16:49,131 INFO L226 Difference]: Without dead ends: 419 [2019-12-27 23:16:49,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=450, Invalid=1032, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:16:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-12-27 23:16:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 149. [2019-12-27 23:16:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:16:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 370 transitions. [2019-12-27 23:16:49,135 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 370 transitions. Word has length 19 [2019-12-27 23:16:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:49,135 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 370 transitions. [2019-12-27 23:16:49,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 370 transitions. [2019-12-27 23:16:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:49,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:49,135 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:49,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:49,336 INFO L410 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash -460927965, now seen corresponding path program 289 times [2019-12-27 23:16:49,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:49,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528417897] [2019-12-27 23:16:49,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:49,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528417897] [2019-12-27 23:16:49,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571689357] [2019-12-27 23:16:49,425 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:49,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:16:49,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-12-27 23:16:49,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:49,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 23:16:49,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1435564123] [2019-12-27 23:16:49,507 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:49,508 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:49,510 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 23:16:49,510 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:49,511 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:49,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:49,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:49,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:49,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:16:49,511 INFO L87 Difference]: Start difference. First operand 149 states and 370 transitions. Second operand 14 states. [2019-12-27 23:16:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:49,720 INFO L93 Difference]: Finished difference Result 369 states and 854 transitions. [2019-12-27 23:16:49,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:16:49,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:49,721 INFO L225 Difference]: With dead ends: 369 [2019-12-27 23:16:49,722 INFO L226 Difference]: Without dead ends: 367 [2019-12-27 23:16:49,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:16:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-12-27 23:16:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 149. [2019-12-27 23:16:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:16:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 370 transitions. [2019-12-27 23:16:49,726 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 370 transitions. Word has length 19 [2019-12-27 23:16:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:49,726 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 370 transitions. [2019-12-27 23:16:49,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 370 transitions. [2019-12-27 23:16:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:49,727 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:49,727 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:49,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:49,927 INFO L410 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:49,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1861972426, now seen corresponding path program 290 times [2019-12-27 23:16:49,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:49,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360484791] [2019-12-27 23:16:49,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:50,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360484791] [2019-12-27 23:16:50,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305030686] [2019-12-27 23:16:50,006 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:50,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:50,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:50,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:50,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-27 23:16:50,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:50,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:50,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1677517005] [2019-12-27 23:16:50,139 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:50,140 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:50,142 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:50,142 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:50,142 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:50,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:50,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:50,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:50,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:50,143 INFO L87 Difference]: Start difference. First operand 149 states and 370 transitions. Second operand 14 states. [2019-12-27 23:16:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:50,437 INFO L93 Difference]: Finished difference Result 421 states and 974 transitions. [2019-12-27 23:16:50,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:16:50,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:50,438 INFO L225 Difference]: With dead ends: 421 [2019-12-27 23:16:50,438 INFO L226 Difference]: Without dead ends: 419 [2019-12-27 23:16:50,439 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:16:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-12-27 23:16:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 148. [2019-12-27 23:16:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:16:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:16:50,441 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:16:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:50,442 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:16:50,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:16:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:50,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:50,442 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:50,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:50,643 INFO L410 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:50,643 INFO L82 PathProgramCache]: Analyzing trace with hash -943633296, now seen corresponding path program 291 times [2019-12-27 23:16:50,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:50,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991800663] [2019-12-27 23:16:50,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:50,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991800663] [2019-12-27 23:16:50,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660351739] [2019-12-27 23:16:50,746 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:50,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:16:50,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:50,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:50,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:16:50,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:50,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:50,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1195841991] [2019-12-27 23:16:50,842 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:50,843 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:50,844 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:50,844 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:50,845 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:50,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:50,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:50,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:50,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:50,846 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 23:16:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:51,143 INFO L93 Difference]: Finished difference Result 428 states and 987 transitions. [2019-12-27 23:16:51,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:16:51,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:51,144 INFO L225 Difference]: With dead ends: 428 [2019-12-27 23:16:51,145 INFO L226 Difference]: Without dead ends: 426 [2019-12-27 23:16:51,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:16:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2019-12-27 23:16:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 147. [2019-12-27 23:16:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:16:51,149 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:16:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:51,149 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:16:51,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:16:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:51,150 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:51,150 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:51,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:51,353 INFO L410 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:51,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:51,354 INFO L82 PathProgramCache]: Analyzing trace with hash 796431369, now seen corresponding path program 292 times [2019-12-27 23:16:51,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:51,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206151638] [2019-12-27 23:16:51,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:51,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206151638] [2019-12-27 23:16:51,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162109665] [2019-12-27 23:16:51,432 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:51,494 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:51,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:51,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:51,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:16:51,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:51,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:51,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [592036682] [2019-12-27 23:16:51,541 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:51,542 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:51,543 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:51,543 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:51,571 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:51,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:51,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:51,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:51,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:51,573 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 23:16:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:51,971 INFO L93 Difference]: Finished difference Result 455 states and 1037 transitions. [2019-12-27 23:16:51,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:16:51,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:51,973 INFO L225 Difference]: With dead ends: 455 [2019-12-27 23:16:51,973 INFO L226 Difference]: Without dead ends: 453 [2019-12-27 23:16:51,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=474, Invalid=1166, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:16:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-12-27 23:16:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 149. [2019-12-27 23:16:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:16:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 369 transitions. [2019-12-27 23:16:51,977 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 369 transitions. Word has length 19 [2019-12-27 23:16:51,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:51,977 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 369 transitions. [2019-12-27 23:16:51,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 369 transitions. [2019-12-27 23:16:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:51,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:51,978 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:52,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:52,179 INFO L410 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:52,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1755075958, now seen corresponding path program 293 times [2019-12-27 23:16:52,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:52,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971423812] [2019-12-27 23:16:52,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:52,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971423812] [2019-12-27 23:16:52,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897784959] [2019-12-27 23:16:52,261 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:52,326 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:16:52,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:52,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:52,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-27 23:16:52,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:52,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:52,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [214998050] [2019-12-27 23:16:52,352 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:52,353 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:52,355 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:16:52,355 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:52,356 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:52,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:52,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:52,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:52,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:52,356 INFO L87 Difference]: Start difference. First operand 149 states and 369 transitions. Second operand 14 states. [2019-12-27 23:16:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:52,658 INFO L93 Difference]: Finished difference Result 438 states and 1006 transitions. [2019-12-27 23:16:52,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:16:52,659 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:52,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:52,660 INFO L225 Difference]: With dead ends: 438 [2019-12-27 23:16:52,660 INFO L226 Difference]: Without dead ends: 436 [2019-12-27 23:16:52,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:16:52,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2019-12-27 23:16:52,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 149. [2019-12-27 23:16:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:16:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 369 transitions. [2019-12-27 23:16:52,664 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 369 transitions. Word has length 19 [2019-12-27 23:16:52,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:52,664 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 369 transitions. [2019-12-27 23:16:52,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:52,665 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 369 transitions. [2019-12-27 23:16:52,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:52,665 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:52,665 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:52,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:52,866 INFO L410 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:52,866 INFO L82 PathProgramCache]: Analyzing trace with hash 354031497, now seen corresponding path program 294 times [2019-12-27 23:16:52,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:52,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235826262] [2019-12-27 23:16:52,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:52,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235826262] [2019-12-27 23:16:52,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944717981] [2019-12-27 23:16:52,944 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:53,012 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:16:53,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:53,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:53,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:16:53,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:53,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:53,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340782372] [2019-12-27 23:16:53,068 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:53,069 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:53,070 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:53,071 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:53,071 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:53,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:53,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:53,071 INFO L87 Difference]: Start difference. First operand 149 states and 369 transitions. Second operand 14 states. [2019-12-27 23:16:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:53,414 INFO L93 Difference]: Finished difference Result 462 states and 1062 transitions. [2019-12-27 23:16:53,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:16:53,415 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:53,415 INFO L225 Difference]: With dead ends: 462 [2019-12-27 23:16:53,416 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 23:16:53,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:16:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 23:16:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 146. [2019-12-27 23:16:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:16:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:16:53,420 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:16:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:53,420 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:16:53,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:16:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:53,420 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:53,421 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:53,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:53,621 INFO L410 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1442927677, now seen corresponding path program 295 times [2019-12-27 23:16:53,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:53,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674269281] [2019-12-27 23:16:53,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:53,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674269281] [2019-12-27 23:16:53,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138668161] [2019-12-27 23:16:53,703 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:53,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:16:53,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:16:53,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:53,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:16:53,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [269337774] [2019-12-27 23:16:53,816 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:53,817 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:53,819 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:53,819 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:53,850 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:53,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:53,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:53,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:53,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:16:53,851 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 16 states. [2019-12-27 23:16:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:54,299 INFO L93 Difference]: Finished difference Result 456 states and 1043 transitions. [2019-12-27 23:16:54,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:16:54,299 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:54,300 INFO L225 Difference]: With dead ends: 456 [2019-12-27 23:16:54,300 INFO L226 Difference]: Without dead ends: 454 [2019-12-27 23:16:54,301 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=1364, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:16:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2019-12-27 23:16:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 147. [2019-12-27 23:16:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:16:54,304 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:16:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:54,304 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:16:54,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:16:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:54,304 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:54,304 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:54,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:54,505 INFO L410 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:54,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:54,506 INFO L82 PathProgramCache]: Analyzing trace with hash -484283088, now seen corresponding path program 296 times [2019-12-27 23:16:54,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:54,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607187804] [2019-12-27 23:16:54,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:54,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607187804] [2019-12-27 23:16:54,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315403804] [2019-12-27 23:16:54,591 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:54,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:54,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:54,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:54,656 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:16:54,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:54,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:54,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [174604049] [2019-12-27 23:16:54,689 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:54,689 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:54,691 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:54,691 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:54,691 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:54,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:54,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:54,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:54,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:54,692 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:16:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:54,987 INFO L93 Difference]: Finished difference Result 433 states and 998 transitions. [2019-12-27 23:16:54,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:16:54,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:54,988 INFO L225 Difference]: With dead ends: 433 [2019-12-27 23:16:54,988 INFO L226 Difference]: Without dead ends: 431 [2019-12-27 23:16:54,989 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:16:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-12-27 23:16:54,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 147. [2019-12-27 23:16:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:16:54,992 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:16:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:54,992 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:16:54,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:16:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:54,992 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:54,992 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:55,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:55,193 INFO L410 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1885327549, now seen corresponding path program 297 times [2019-12-27 23:16:55,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:55,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594030844] [2019-12-27 23:16:55,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:55,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594030844] [2019-12-27 23:16:55,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309129567] [2019-12-27 23:16:55,279 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:55,348 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:16:55,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:55,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:55,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:16:55,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:55,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:55,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1957810894] [2019-12-27 23:16:55,385 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:55,386 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:55,387 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:55,387 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:55,388 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:55,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:55,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:55,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:55,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:55,389 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:16:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:55,731 INFO L93 Difference]: Finished difference Result 455 states and 1048 transitions. [2019-12-27 23:16:55,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:16:55,732 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:55,733 INFO L225 Difference]: With dead ends: 455 [2019-12-27 23:16:55,733 INFO L226 Difference]: Without dead ends: 453 [2019-12-27 23:16:55,733 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:16:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-12-27 23:16:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 146. [2019-12-27 23:16:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:16:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:16:55,736 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:16:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:55,736 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:16:55,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:16:55,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:55,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:55,737 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:55,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:55,938 INFO L410 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:55,938 INFO L82 PathProgramCache]: Analyzing trace with hash -966988419, now seen corresponding path program 298 times [2019-12-27 23:16:55,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:55,939 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015328279] [2019-12-27 23:16:55,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:56,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015328279] [2019-12-27 23:16:56,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061957575] [2019-12-27 23:16:56,010 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:56,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:16:56,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:56,071 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:56,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:16:56,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:56,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:56,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [585522006] [2019-12-27 23:16:56,104 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:56,105 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:56,106 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:56,106 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:56,107 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:56,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:56,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:56,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:56,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:56,107 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 23:16:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:56,452 INFO L93 Difference]: Finished difference Result 472 states and 1086 transitions. [2019-12-27 23:16:56,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:16:56,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:56,454 INFO L225 Difference]: With dead ends: 472 [2019-12-27 23:16:56,454 INFO L226 Difference]: Without dead ends: 470 [2019-12-27 23:16:56,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:16:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-12-27 23:16:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 141. [2019-12-27 23:16:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 23:16:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 23:16:56,459 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 19 [2019-12-27 23:16:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:56,459 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 23:16:56,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 23:16:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:56,460 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:56,460 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:56,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:56,663 INFO L410 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash 16937244, now seen corresponding path program 299 times [2019-12-27 23:16:56,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:56,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198643919] [2019-12-27 23:16:56,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:56,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198643919] [2019-12-27 23:16:56,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509149523] [2019-12-27 23:16:56,752 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:56,816 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:16:56,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:56,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:56,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:16:56,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:56,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:56,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2113871303] [2019-12-27 23:16:56,850 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:56,851 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:56,853 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:16:56,853 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:56,917 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:16:56,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:16:56,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:16:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:16:56,918 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 18 states. [2019-12-27 23:16:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:57,514 INFO L93 Difference]: Finished difference Result 501 states and 1132 transitions. [2019-12-27 23:16:57,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:16:57,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:16:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:57,516 INFO L225 Difference]: With dead ends: 501 [2019-12-27 23:16:57,516 INFO L226 Difference]: Without dead ends: 499 [2019-12-27 23:16:57,516 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=701, Invalid=1651, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 23:16:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-12-27 23:16:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 146. [2019-12-27 23:16:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:16:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:16:57,520 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:16:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:57,521 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:16:57,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:16:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:16:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:57,521 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:57,521 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:57,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:57,722 INFO L410 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:57,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2143581367, now seen corresponding path program 300 times [2019-12-27 23:16:57,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:57,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911593558] [2019-12-27 23:16:57,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:57,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911593558] [2019-12-27 23:16:57,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749556742] [2019-12-27 23:16:57,812 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:57,880 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:16:57,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:57,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:57,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:16:57,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:57,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:57,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [82095645] [2019-12-27 23:16:57,917 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:57,918 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:57,919 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:16:57,920 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:57,947 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:16:57,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:16:57,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:57,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:16:57,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:16:57,948 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 16 states. [2019-12-27 23:16:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:58,396 INFO L93 Difference]: Finished difference Result 462 states and 1053 transitions. [2019-12-27 23:16:58,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:16:58,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:16:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:58,397 INFO L225 Difference]: With dead ends: 462 [2019-12-27 23:16:58,397 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 23:16:58,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 23:16:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 23:16:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 147. [2019-12-27 23:16:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:16:58,402 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:16:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:58,402 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:16:58,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:16:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:16:58,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:58,402 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:58,403 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:58,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:58,603 INFO L410 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1184936778, now seen corresponding path program 301 times [2019-12-27 23:16:58,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:58,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980414165] [2019-12-27 23:16:58,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:58,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980414165] [2019-12-27 23:16:58,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165411266] [2019-12-27 23:16:58,687 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:58,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:16:58,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:16:58,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:58,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:16:58,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1419021211] [2019-12-27 23:16:58,777 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:58,777 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:58,779 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:16:58,779 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:58,780 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:58,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:58,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:58,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:58,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:16:58,780 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:16:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:59,107 INFO L93 Difference]: Finished difference Result 428 states and 980 transitions. [2019-12-27 23:16:59,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 23:16:59,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:59,109 INFO L225 Difference]: With dead ends: 428 [2019-12-27 23:16:59,109 INFO L226 Difference]: Without dead ends: 426 [2019-12-27 23:16:59,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 23:16:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2019-12-27 23:16:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 147. [2019-12-27 23:16:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:16:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:16:59,113 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:16:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:59,113 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:16:59,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:16:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:59,113 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:59,114 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:16:59,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:59,314 INFO L410 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:16:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:16:59,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1708986057, now seen corresponding path program 302 times [2019-12-27 23:16:59,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:16:59,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367677765] [2019-12-27 23:16:59,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:16:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:16:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:16:59,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367677765] [2019-12-27 23:16:59,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606762366] [2019-12-27 23:16:59,396 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:16:59,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:16:59,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:16:59,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:16:59,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:16:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:16:59,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:16:59,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:16:59,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1623339083] [2019-12-27 23:16:59,496 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:16:59,496 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:16:59,498 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:16:59,498 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:16:59,499 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:16:59,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:16:59,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:16:59,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:16:59,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:16:59,499 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:16:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:16:59,850 INFO L93 Difference]: Finished difference Result 465 states and 1068 transitions. [2019-12-27 23:16:59,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:16:59,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:16:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:16:59,851 INFO L225 Difference]: With dead ends: 465 [2019-12-27 23:16:59,851 INFO L226 Difference]: Without dead ends: 463 [2019-12-27 23:16:59,851 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:16:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2019-12-27 23:16:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 146. [2019-12-27 23:16:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:16:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:16:59,855 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:16:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:16:59,855 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:16:59,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:16:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:16:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:16:59,855 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:16:59,856 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:00,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:00,056 INFO L410 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:00,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:00,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1667642109, now seen corresponding path program 303 times [2019-12-27 23:17:00,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:00,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128092352] [2019-12-27 23:17:00,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:00,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128092352] [2019-12-27 23:17:00,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908324780] [2019-12-27 23:17:00,140 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:00,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:17:00,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:00,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:17:00,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:17:00,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:00,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:17:00,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [472904088] [2019-12-27 23:17:00,276 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:00,277 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:00,278 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:17:00,278 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:00,279 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:00,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:00,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:00,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:00,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:00,279 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 23:17:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:00,656 INFO L93 Difference]: Finished difference Result 477 states and 1092 transitions. [2019-12-27 23:17:00,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:17:00,656 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:00,657 INFO L225 Difference]: With dead ends: 477 [2019-12-27 23:17:00,657 INFO L226 Difference]: Without dead ends: 475 [2019-12-27 23:17:00,658 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=1149, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:17:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2019-12-27 23:17:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 143. [2019-12-27 23:17:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:17:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2019-12-27 23:17:00,662 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 19 [2019-12-27 23:17:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:00,662 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2019-12-27 23:17:00,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2019-12-27 23:17:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:00,662 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:00,662 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:00,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:00,863 INFO L410 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:00,863 INFO L82 PathProgramCache]: Analyzing trace with hash 72422556, now seen corresponding path program 304 times [2019-12-27 23:17:00,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:00,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754433139] [2019-12-27 23:17:00,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:00,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754433139] [2019-12-27 23:17:00,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598214342] [2019-12-27 23:17:00,943 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:01,003 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:01,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:01,005 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:01,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:17:01,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:01,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:17:01,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [125232931] [2019-12-27 23:17:01,048 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:01,049 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:01,051 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:17:01,051 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:01,080 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:17:01,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:17:01,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:01,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:17:01,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:17:01,081 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand 16 states. [2019-12-27 23:17:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:01,535 INFO L93 Difference]: Finished difference Result 494 states and 1121 transitions. [2019-12-27 23:17:01,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:17:01,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:17:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:01,537 INFO L225 Difference]: With dead ends: 494 [2019-12-27 23:17:01,537 INFO L226 Difference]: Without dead ends: 492 [2019-12-27 23:17:01,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:17:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2019-12-27 23:17:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 146. [2019-12-27 23:17:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:17:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:17:01,541 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:17:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:01,541 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:17:01,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:17:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:17:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:01,541 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:01,541 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:01,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:01,742 INFO L410 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:01,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1031067145, now seen corresponding path program 305 times [2019-12-27 23:17:01,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:01,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113771740] [2019-12-27 23:17:01,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:01,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113771740] [2019-12-27 23:17:01,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857976549] [2019-12-27 23:17:01,819 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:01,885 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:17:01,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:01,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:01,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:17:01,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:01,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:01,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1861856336] [2019-12-27 23:17:01,920 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:01,921 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:01,922 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:17:01,922 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:01,923 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:01,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:01,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:01,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:01,923 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 23:17:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:02,303 INFO L93 Difference]: Finished difference Result 482 states and 1097 transitions. [2019-12-27 23:17:02,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:17:02,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:02,305 INFO L225 Difference]: With dead ends: 482 [2019-12-27 23:17:02,305 INFO L226 Difference]: Without dead ends: 480 [2019-12-27 23:17:02,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=398, Invalid=1008, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:17:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2019-12-27 23:17:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 145. [2019-12-27 23:17:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:17:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:17:02,309 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:17:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:02,309 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:17:02,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:17:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:02,310 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:02,310 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:02,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:02,513 INFO L410 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:02,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:02,514 INFO L82 PathProgramCache]: Analyzing trace with hash -369977316, now seen corresponding path program 306 times [2019-12-27 23:17:02,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:02,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018888074] [2019-12-27 23:17:02,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:02,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018888074] [2019-12-27 23:17:02,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024558022] [2019-12-27 23:17:02,622 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:02,715 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:17:02,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:02,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:02,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 23:17:02,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:02,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:02,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1488741634] [2019-12-27 23:17:02,755 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:02,756 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:02,759 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:02,759 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:02,760 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:02,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:02,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:02,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:02,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:02,761 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 23:17:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:03,116 INFO L93 Difference]: Finished difference Result 499 states and 1130 transitions. [2019-12-27 23:17:03,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:17:03,116 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:03,117 INFO L225 Difference]: With dead ends: 499 [2019-12-27 23:17:03,117 INFO L226 Difference]: Without dead ends: 497 [2019-12-27 23:17:03,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:17:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2019-12-27 23:17:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 139. [2019-12-27 23:17:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 23:17:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2019-12-27 23:17:03,121 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 19 [2019-12-27 23:17:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:03,122 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2019-12-27 23:17:03,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2019-12-27 23:17:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:03,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:03,122 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:03,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:03,323 INFO L410 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:03,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:03,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1397860266, now seen corresponding path program 307 times [2019-12-27 23:17:03,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:03,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962288390] [2019-12-27 23:17:03,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:03,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962288390] [2019-12-27 23:17:03,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910694112] [2019-12-27 23:17:03,403 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:03,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:03,466 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:17:03,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:03,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:03,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1469978471] [2019-12-27 23:17:03,514 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:03,515 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:03,517 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:17:03,517 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:03,613 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 7 times. [2019-12-27 23:17:03,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 23:17:03,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:03,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 23:17:03,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:17:03,614 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand 20 states. [2019-12-27 23:17:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:04,449 INFO L93 Difference]: Finished difference Result 518 states and 1165 transitions. [2019-12-27 23:17:04,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-27 23:17:04,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-12-27 23:17:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:04,450 INFO L225 Difference]: With dead ends: 518 [2019-12-27 23:17:04,451 INFO L226 Difference]: Without dead ends: 516 [2019-12-27 23:17:04,451 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=976, Invalid=2330, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 23:17:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2019-12-27 23:17:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 147. [2019-12-27 23:17:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:04,455 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:04,455 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:04,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 23:17:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:04,456 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:04,456 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:04,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:04,657 INFO L410 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:04,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:04,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1107925827, now seen corresponding path program 308 times [2019-12-27 23:17:04,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:04,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164374619] [2019-12-27 23:17:04,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:04,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164374619] [2019-12-27 23:17:04,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292991139] [2019-12-27 23:17:04,734 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:04,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:04,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:04,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:17:04,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:04,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:04,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:17:04,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [344282521] [2019-12-27 23:17:04,852 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:04,853 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:04,855 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:17:04,856 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:04,925 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:17:04,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:17:04,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:04,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:17:04,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:17:04,927 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 18 states. [2019-12-27 23:17:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:05,526 INFO L93 Difference]: Finished difference Result 477 states and 1083 transitions. [2019-12-27 23:17:05,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 23:17:05,526 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:17:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:05,527 INFO L225 Difference]: With dead ends: 477 [2019-12-27 23:17:05,527 INFO L226 Difference]: Without dead ends: 475 [2019-12-27 23:17:05,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=710, Invalid=1740, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 23:17:05,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2019-12-27 23:17:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 148. [2019-12-27 23:17:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:17:05,532 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:17:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:05,532 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:17:05,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:17:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:17:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:05,532 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:05,532 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:05,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:05,733 INFO L410 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:05,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1052592784, now seen corresponding path program 309 times [2019-12-27 23:17:05,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:05,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548114295] [2019-12-27 23:17:05,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:05,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548114295] [2019-12-27 23:17:05,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641560088] [2019-12-27 23:17:05,810 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:05,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 23:17:05,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:05,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:05,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 23:17:05,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:05,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:17:05,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1290627469] [2019-12-27 23:17:05,897 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:05,898 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:05,900 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:05,900 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:05,925 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:17:05,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:17:05,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:05,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:17:05,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:17:05,926 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 16 states. [2019-12-27 23:17:06,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:06,318 INFO L93 Difference]: Finished difference Result 416 states and 954 transitions. [2019-12-27 23:17:06,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:17:06,318 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:17:06,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:06,319 INFO L225 Difference]: With dead ends: 416 [2019-12-27 23:17:06,319 INFO L226 Difference]: Without dead ends: 414 [2019-12-27 23:17:06,320 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1085, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:17:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2019-12-27 23:17:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 150. [2019-12-27 23:17:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 23:17:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 374 transitions. [2019-12-27 23:17:06,324 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 374 transitions. Word has length 19 [2019-12-27 23:17:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:06,324 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 374 transitions. [2019-12-27 23:17:06,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:17:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 374 transitions. [2019-12-27 23:17:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:06,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:06,324 INFO L411 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:06,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:06,525 INFO L410 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash -93948195, now seen corresponding path program 310 times [2019-12-27 23:17:06,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:06,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134202646] [2019-12-27 23:17:06,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:06,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134202646] [2019-12-27 23:17:06,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707903896] [2019-12-27 23:17:06,611 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:06,674 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:06,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:06,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-27 23:17:06,675 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-27 23:17:06,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:06,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4] total 16 [2019-12-27 23:17:06,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [158386247] [2019-12-27 23:17:06,692 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:06,692 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:06,694 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 41 transitions. [2019-12-27 23:17:06,694 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:06,694 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:06,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:06,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:06,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-12-27 23:17:06,695 INFO L87 Difference]: Start difference. First operand 150 states and 374 transitions. Second operand 14 states. [2019-12-27 23:17:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:06,924 INFO L93 Difference]: Finished difference Result 357 states and 826 transitions. [2019-12-27 23:17:06,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 23:17:06,924 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:06,925 INFO L225 Difference]: With dead ends: 357 [2019-12-27 23:17:06,925 INFO L226 Difference]: Without dead ends: 355 [2019-12-27 23:17:06,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:17:06,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2019-12-27 23:17:06,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 150. [2019-12-27 23:17:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 23:17:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 374 transitions. [2019-12-27 23:17:06,929 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 374 transitions. Word has length 19 [2019-12-27 23:17:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:06,930 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 374 transitions. [2019-12-27 23:17:06,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 374 transitions. [2019-12-27 23:17:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:06,930 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:06,930 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:07,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:07,131 INFO L410 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:07,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1494992656, now seen corresponding path program 311 times [2019-12-27 23:17:07,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:07,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429608694] [2019-12-27 23:17:07,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:07,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429608694] [2019-12-27 23:17:07,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512594788] [2019-12-27 23:17:07,216 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:07,279 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:17:07,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:07,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:07,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:17:07,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:07,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:17:07,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1508845560] [2019-12-27 23:17:07,308 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:07,309 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:07,310 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 23:17:07,310 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:07,311 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:07,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:07,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:07,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:07,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:17:07,311 INFO L87 Difference]: Start difference. First operand 150 states and 374 transitions. Second operand 14 states. [2019-12-27 23:17:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:07,627 INFO L93 Difference]: Finished difference Result 422 states and 971 transitions. [2019-12-27 23:17:07,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:17:07,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:07,628 INFO L225 Difference]: With dead ends: 422 [2019-12-27 23:17:07,628 INFO L226 Difference]: Without dead ends: 420 [2019-12-27 23:17:07,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:17:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2019-12-27 23:17:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 149. [2019-12-27 23:17:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:17:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 370 transitions. [2019-12-27 23:17:07,632 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 370 transitions. Word has length 19 [2019-12-27 23:17:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:07,632 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 370 transitions. [2019-12-27 23:17:07,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 370 transitions. [2019-12-27 23:17:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:07,632 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:07,633 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:07,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:07,833 INFO L410 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash -576653526, now seen corresponding path program 312 times [2019-12-27 23:17:07,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:07,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867578178] [2019-12-27 23:17:07,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:07,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867578178] [2019-12-27 23:17:07,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668670064] [2019-12-27 23:17:07,917 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:07,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:17:07,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:07,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:07,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:17:08,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:08,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:17:08,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1141416262] [2019-12-27 23:17:08,013 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:08,014 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:08,015 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:08,016 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:08,016 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:08,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:08,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:08,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:08,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:17:08,016 INFO L87 Difference]: Start difference. First operand 149 states and 370 transitions. Second operand 14 states. [2019-12-27 23:17:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:08,336 INFO L93 Difference]: Finished difference Result 436 states and 1007 transitions. [2019-12-27 23:17:08,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:17:08,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:08,338 INFO L225 Difference]: With dead ends: 436 [2019-12-27 23:17:08,338 INFO L226 Difference]: Without dead ends: 434 [2019-12-27 23:17:08,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:17:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2019-12-27 23:17:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 148. [2019-12-27 23:17:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:17:08,341 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:17:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:08,342 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:17:08,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:17:08,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:08,342 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:08,342 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:08,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:08,543 INFO L410 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:08,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1163411139, now seen corresponding path program 313 times [2019-12-27 23:17:08,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:08,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006834781] [2019-12-27 23:17:08,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:08,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006834781] [2019-12-27 23:17:08,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735584075] [2019-12-27 23:17:08,626 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:08,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:17:08,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:17:08,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:08,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2019-12-27 23:17:08,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [81917844] [2019-12-27 23:17:08,740 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:08,741 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:08,742 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:08,742 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:08,779 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:17:08,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:17:08,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:08,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:17:08,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:17:08,780 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 16 states. [2019-12-27 23:17:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:09,237 INFO L93 Difference]: Finished difference Result 461 states and 1048 transitions. [2019-12-27 23:17:09,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:17:09,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:17:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:09,238 INFO L225 Difference]: With dead ends: 461 [2019-12-27 23:17:09,238 INFO L226 Difference]: Without dead ends: 459 [2019-12-27 23:17:09,239 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=532, Invalid=1360, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:17:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2019-12-27 23:17:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 150. [2019-12-27 23:17:09,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 23:17:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 373 transitions. [2019-12-27 23:17:09,242 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 373 transitions. Word has length 19 [2019-12-27 23:17:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:09,242 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 373 transitions. [2019-12-27 23:17:09,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:17:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 373 transitions. [2019-12-27 23:17:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:09,242 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:09,242 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:09,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:09,443 INFO L410 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:09,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2122055728, now seen corresponding path program 314 times [2019-12-27 23:17:09,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:09,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668335092] [2019-12-27 23:17:09,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:09,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668335092] [2019-12-27 23:17:09,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494562087] [2019-12-27 23:17:09,520 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:09,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:09,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:09,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:09,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:17:09,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:09,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:17:09,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1634286083] [2019-12-27 23:17:09,613 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:09,613 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:09,615 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:17:09,615 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:09,615 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:09,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:09,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:17:09,616 INFO L87 Difference]: Start difference. First operand 150 states and 373 transitions. Second operand 14 states. [2019-12-27 23:17:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:09,937 INFO L93 Difference]: Finished difference Result 441 states and 1011 transitions. [2019-12-27 23:17:09,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:17:09,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:09,939 INFO L225 Difference]: With dead ends: 441 [2019-12-27 23:17:09,939 INFO L226 Difference]: Without dead ends: 439 [2019-12-27 23:17:09,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:17:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2019-12-27 23:17:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 150. [2019-12-27 23:17:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 23:17:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 373 transitions. [2019-12-27 23:17:09,943 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 373 transitions. Word has length 19 [2019-12-27 23:17:09,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:09,943 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 373 transitions. [2019-12-27 23:17:09,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 373 transitions. [2019-12-27 23:17:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:09,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:09,944 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:10,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:10,144 INFO L410 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:10,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:10,145 INFO L82 PathProgramCache]: Analyzing trace with hash 721011267, now seen corresponding path program 315 times [2019-12-27 23:17:10,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:10,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528448248] [2019-12-27 23:17:10,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:10,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528448248] [2019-12-27 23:17:10,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650889527] [2019-12-27 23:17:10,219 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:10,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:17:10,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:10,285 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:10,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:10,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:10,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:10,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1966285735] [2019-12-27 23:17:10,320 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:10,321 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:10,322 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 23:17:10,323 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:10,323 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:10,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:10,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:10,323 INFO L87 Difference]: Start difference. First operand 150 states and 373 transitions. Second operand 14 states. [2019-12-27 23:17:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:10,668 INFO L93 Difference]: Finished difference Result 472 states and 1077 transitions. [2019-12-27 23:17:10,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 23:17:10,669 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:10,670 INFO L225 Difference]: With dead ends: 472 [2019-12-27 23:17:10,670 INFO L226 Difference]: Without dead ends: 470 [2019-12-27 23:17:10,670 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=949, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 23:17:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-12-27 23:17:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 147. [2019-12-27 23:17:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:10,673 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:10,673 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:10,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:10,674 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:10,674 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:10,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:10,875 INFO L410 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1075947907, now seen corresponding path program 316 times [2019-12-27 23:17:10,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:10,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988821233] [2019-12-27 23:17:10,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:10,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988821233] [2019-12-27 23:17:10,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129032705] [2019-12-27 23:17:10,957 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:11,020 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:11,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:11,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:11,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:11,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:11,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:11,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1473237900] [2019-12-27 23:17:11,055 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:11,056 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:11,058 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:11,058 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:11,084 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:17:11,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:17:11,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:11,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:17:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:11,084 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 23:17:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:11,531 INFO L93 Difference]: Finished difference Result 463 states and 1059 transitions. [2019-12-27 23:17:11,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 23:17:11,532 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:17:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:11,533 INFO L225 Difference]: With dead ends: 463 [2019-12-27 23:17:11,533 INFO L226 Difference]: Without dead ends: 461 [2019-12-27 23:17:11,533 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=525, Invalid=1281, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 23:17:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2019-12-27 23:17:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 148. [2019-12-27 23:17:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:17:11,537 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:17:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:11,537 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:17:11,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:17:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:17:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:11,538 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:11,538 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:11,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:11,738 INFO L410 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:11,739 INFO L82 PathProgramCache]: Analyzing trace with hash -117303318, now seen corresponding path program 317 times [2019-12-27 23:17:11,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:11,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492948093] [2019-12-27 23:17:11,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:11,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492948093] [2019-12-27 23:17:11,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260682044] [2019-12-27 23:17:11,830 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:11,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:17:11,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:11,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:11,895 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:17:11,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:11,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:17:11,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [346380113] [2019-12-27 23:17:11,922 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:11,923 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:11,925 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:17:11,925 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:11,926 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:11,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:11,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:11,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:17:11,926 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 23:17:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:12,249 INFO L93 Difference]: Finished difference Result 439 states and 1013 transitions. [2019-12-27 23:17:12,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:17:12,250 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:12,251 INFO L225 Difference]: With dead ends: 439 [2019-12-27 23:17:12,251 INFO L226 Difference]: Without dead ends: 437 [2019-12-27 23:17:12,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:17:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-12-27 23:17:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 148. [2019-12-27 23:17:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:17:12,255 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:17:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:12,255 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:17:12,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:17:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:12,256 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:12,256 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:12,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:12,457 INFO L410 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1518347779, now seen corresponding path program 318 times [2019-12-27 23:17:12,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:12,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365842233] [2019-12-27 23:17:12,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:12,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365842233] [2019-12-27 23:17:12,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029427318] [2019-12-27 23:17:12,541 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:12,611 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:17:12,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:12,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:12,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:17:12,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:12,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:12,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [218128626] [2019-12-27 23:17:12,649 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:12,650 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:12,651 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 23:17:12,652 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:12,652 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:12,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:12,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:12,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:12,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:12,652 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 23:17:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:13,014 INFO L93 Difference]: Finished difference Result 462 states and 1064 transitions. [2019-12-27 23:17:13,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:17:13,014 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:13,015 INFO L225 Difference]: With dead ends: 462 [2019-12-27 23:17:13,016 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 23:17:13,016 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:17:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 23:17:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 147. [2019-12-27 23:17:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:13,019 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:13,020 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:13,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:13,020 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:13,020 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:13,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:13,221 INFO L410 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash -600008649, now seen corresponding path program 319 times [2019-12-27 23:17:13,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:13,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111094763] [2019-12-27 23:17:13,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:13,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111094763] [2019-12-27 23:17:13,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658386075] [2019-12-27 23:17:13,303 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:13,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:13,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:13,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:13,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:13,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1536921092] [2019-12-27 23:17:13,399 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:13,400 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:13,402 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:13,402 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:13,402 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:13,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:13,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:13,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:13,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:13,403 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:17:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:13,763 INFO L93 Difference]: Finished difference Result 479 states and 1102 transitions. [2019-12-27 23:17:13,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 23:17:13,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:13,765 INFO L225 Difference]: With dead ends: 479 [2019-12-27 23:17:13,765 INFO L226 Difference]: Without dead ends: 477 [2019-12-27 23:17:13,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 23:17:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2019-12-27 23:17:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 142. [2019-12-27 23:17:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 23:17:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 344 transitions. [2019-12-27 23:17:13,769 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 344 transitions. Word has length 19 [2019-12-27 23:17:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:13,769 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 344 transitions. [2019-12-27 23:17:13,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 344 transitions. [2019-12-27 23:17:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:13,769 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:13,770 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:13,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:13,970 INFO L410 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:13,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash 383917014, now seen corresponding path program 320 times [2019-12-27 23:17:13,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:13,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934287903] [2019-12-27 23:17:13,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:14,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934287903] [2019-12-27 23:17:14,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467113702] [2019-12-27 23:17:14,047 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:14,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:14,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:14,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:14,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:14,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:14,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:14,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2125665204] [2019-12-27 23:17:14,148 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:14,148 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:14,150 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:17:14,150 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:14,222 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:17:14,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:17:14,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:14,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:17:14,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:17:14,223 INFO L87 Difference]: Start difference. First operand 142 states and 344 transitions. Second operand 18 states. [2019-12-27 23:17:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:14,843 INFO L93 Difference]: Finished difference Result 484 states and 1093 transitions. [2019-12-27 23:17:14,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 23:17:14,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:17:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:14,845 INFO L225 Difference]: With dead ends: 484 [2019-12-27 23:17:14,845 INFO L226 Difference]: Without dead ends: 482 [2019-12-27 23:17:14,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=737, Invalid=1713, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 23:17:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2019-12-27 23:17:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 147. [2019-12-27 23:17:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:14,850 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:14,850 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:14,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:17:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:14,850 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:14,850 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:15,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:15,051 INFO L410 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:15,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1776601597, now seen corresponding path program 321 times [2019-12-27 23:17:15,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:15,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438349326] [2019-12-27 23:17:15,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:15,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438349326] [2019-12-27 23:17:15,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17125680] [2019-12-27 23:17:15,133 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:15,199 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:17:15,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:15,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:15,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:17:15,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:15,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:15,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1010946554] [2019-12-27 23:17:15,237 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:15,238 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:15,240 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:15,240 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:15,269 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:17:15,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:17:15,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:15,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:17:15,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:15,270 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 23:17:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:15,739 INFO L93 Difference]: Finished difference Result 463 states and 1056 transitions. [2019-12-27 23:17:15,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 23:17:15,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:17:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:15,740 INFO L225 Difference]: With dead ends: 463 [2019-12-27 23:17:15,740 INFO L226 Difference]: Without dead ends: 461 [2019-12-27 23:17:15,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=549, Invalid=1343, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:17:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2019-12-27 23:17:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 148. [2019-12-27 23:17:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:17:15,745 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:17:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:15,745 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:17:15,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:17:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:17:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:15,746 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:15,746 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:15,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:15,946 INFO L410 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:15,947 INFO L82 PathProgramCache]: Analyzing trace with hash -817957008, now seen corresponding path program 322 times [2019-12-27 23:17:15,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:15,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027509576] [2019-12-27 23:17:15,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:16,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027509576] [2019-12-27 23:17:16,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571957362] [2019-12-27 23:17:16,028 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 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:16,088 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:16,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:16,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:16,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 23:17:16,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:16,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:17:16,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1562548888] [2019-12-27 23:17:16,117 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:16,118 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:16,120 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 35 transitions. [2019-12-27 23:17:16,120 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:16,120 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:16,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:16,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:16,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:17:16,121 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 23:17:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:16,469 INFO L93 Difference]: Finished difference Result 435 states and 1001 transitions. [2019-12-27 23:17:16,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:17:16,470 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:16,471 INFO L225 Difference]: With dead ends: 435 [2019-12-27 23:17:16,471 INFO L226 Difference]: Without dead ends: 433 [2019-12-27 23:17:16,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:17:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2019-12-27 23:17:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 148. [2019-12-27 23:17:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:17:16,475 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:17:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:16,475 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:17:16,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:17:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:16,476 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:16,476 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:16,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:16,677 INFO L410 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:16,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2075965827, now seen corresponding path program 323 times [2019-12-27 23:17:16,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:16,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708624025] [2019-12-27 23:17:16,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:16,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708624025] [2019-12-27 23:17:16,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790660669] [2019-12-27 23:17:16,773 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:16,837 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:17:16,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:16,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:16,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:17:16,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:16,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:16,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1169939269] [2019-12-27 23:17:16,871 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:16,872 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:16,873 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 23:17:16,874 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:16,874 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:16,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:16,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:16,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:16,874 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 23:17:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:17,252 INFO L93 Difference]: Finished difference Result 461 states and 1060 transitions. [2019-12-27 23:17:17,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:17:17,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:17,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:17,253 INFO L225 Difference]: With dead ends: 461 [2019-12-27 23:17:17,254 INFO L226 Difference]: Without dead ends: 459 [2019-12-27 23:17:17,254 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:17:17,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2019-12-27 23:17:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 147. [2019-12-27 23:17:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:17,257 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:17,258 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:17,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:17,258 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:17,258 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:17,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:17,459 INFO L410 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:17,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:17,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1300662339, now seen corresponding path program 324 times [2019-12-27 23:17:17,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:17,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170160462] [2019-12-27 23:17:17,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:17,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170160462] [2019-12-27 23:17:17,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690977580] [2019-12-27 23:17:17,538 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:17,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:17:17,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:17,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:17,610 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:17,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:17,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:17,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1902639268] [2019-12-27 23:17:17,654 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:17,654 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:17,656 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:17,656 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:17,656 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:17,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:17,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:17,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:17,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:17,657 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:17:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:18,041 INFO L93 Difference]: Finished difference Result 460 states and 1055 transitions. [2019-12-27 23:17:18,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:17:18,041 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:18,042 INFO L225 Difference]: With dead ends: 460 [2019-12-27 23:17:18,043 INFO L226 Difference]: Without dead ends: 458 [2019-12-27 23:17:18,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:17:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2019-12-27 23:17:18,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 144. [2019-12-27 23:17:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 23:17:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-27 23:17:18,046 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 19 [2019-12-27 23:17:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:18,046 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-27 23:17:18,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-27 23:17:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:18,047 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:18,047 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:18,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:18,248 INFO L410 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:18,248 INFO L82 PathProgramCache]: Analyzing trace with hash 439402326, now seen corresponding path program 325 times [2019-12-27 23:17:18,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:18,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586899512] [2019-12-27 23:17:18,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:18,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586899512] [2019-12-27 23:17:18,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102614375] [2019-12-27 23:17:18,323 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:18,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:18,384 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:18,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:18,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:18,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1166378524] [2019-12-27 23:17:18,419 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:18,420 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:18,422 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:18,422 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:18,452 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:17:18,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:17:18,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:18,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:17:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:18,453 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-27 23:17:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:18,921 INFO L93 Difference]: Finished difference Result 491 states and 1119 transitions. [2019-12-27 23:17:18,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 23:17:18,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:17:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:18,923 INFO L225 Difference]: With dead ends: 491 [2019-12-27 23:17:18,923 INFO L226 Difference]: Without dead ends: 489 [2019-12-27 23:17:18,923 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=560, Invalid=1332, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 23:17:18,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2019-12-27 23:17:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 147. [2019-12-27 23:17:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:18,927 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:18,927 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:18,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:17:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:18,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:18,928 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:19,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:19,129 INFO L410 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1398046915, now seen corresponding path program 326 times [2019-12-27 23:17:19,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:19,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461236065] [2019-12-27 23:17:19,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:19,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461236065] [2019-12-27 23:17:19,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836956557] [2019-12-27 23:17:19,206 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:19,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:19,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:19,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:19,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:17:19,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:19,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:19,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1262570549] [2019-12-27 23:17:19,305 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:19,305 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:19,307 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:17:19,307 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:19,308 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:19,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:19,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:19,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:19,308 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:17:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:19,684 INFO L93 Difference]: Finished difference Result 483 states and 1106 transitions. [2019-12-27 23:17:19,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:17:19,685 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:19,686 INFO L225 Difference]: With dead ends: 483 [2019-12-27 23:17:19,686 INFO L226 Difference]: Without dead ends: 481 [2019-12-27 23:17:19,686 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:17:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2019-12-27 23:17:19,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 146. [2019-12-27 23:17:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:17:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:17:19,690 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:17:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:19,690 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:17:19,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:17:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:19,691 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:19,691 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:19,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:19,892 INFO L410 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:19,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2997546, now seen corresponding path program 327 times [2019-12-27 23:17:19,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:19,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668408883] [2019-12-27 23:17:19,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:19,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668408883] [2019-12-27 23:17:19,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344303002] [2019-12-27 23:17:19,970 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:20,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:17:20,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:20,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:20,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:17:20,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:20,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:20,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [433612550] [2019-12-27 23:17:20,072 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:20,073 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:20,075 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 23:17:20,075 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:20,076 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:20,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:20,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:20,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:20,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:20,076 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 23:17:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:20,450 INFO L93 Difference]: Finished difference Result 494 states and 1132 transitions. [2019-12-27 23:17:20,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 23:17:20,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:20,452 INFO L225 Difference]: With dead ends: 494 [2019-12-27 23:17:20,452 INFO L226 Difference]: Without dead ends: 492 [2019-12-27 23:17:20,452 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:17:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2019-12-27 23:17:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 141. [2019-12-27 23:17:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 23:17:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 23:17:20,456 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 19 [2019-12-27 23:17:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:20,456 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 23:17:20,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 23:17:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:20,457 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:20,457 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:20,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:20,657 INFO L410 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:20,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash 138489104, now seen corresponding path program 328 times [2019-12-27 23:17:20,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:20,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189707675] [2019-12-27 23:17:20,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:20,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189707675] [2019-12-27 23:17:20,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180631797] [2019-12-27 23:17:20,729 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:20,795 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:20,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:20,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:20,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:20,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:20,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:17:20,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1418902293] [2019-12-27 23:17:20,843 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:20,843 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:20,845 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:17:20,845 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:20,904 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 5 times. [2019-12-27 23:17:20,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 23:17:20,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:20,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 23:17:20,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:17:20,905 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 18 states. [2019-12-27 23:17:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:21,554 INFO L93 Difference]: Finished difference Result 503 states and 1124 transitions. [2019-12-27 23:17:21,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 23:17:21,554 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2019-12-27 23:17:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:21,555 INFO L225 Difference]: With dead ends: 503 [2019-12-27 23:17:21,555 INFO L226 Difference]: Without dead ends: 501 [2019-12-27 23:17:21,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=747, Invalid=1905, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 23:17:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2019-12-27 23:17:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 147. [2019-12-27 23:17:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:21,560 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:21,560 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:21,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 23:17:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:21,561 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:21,561 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:21,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:21,762 INFO L410 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:21,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2022029507, now seen corresponding path program 329 times [2019-12-27 23:17:21,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:21,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192602498] [2019-12-27 23:17:21,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:21,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192602498] [2019-12-27 23:17:21,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441129742] [2019-12-27 23:17:21,840 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:21,903 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:17:21,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:21,904 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 23:17:21,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:21,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:21,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 23:17:21,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [473222052] [2019-12-27 23:17:21,912 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:21,913 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:21,915 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:21,916 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:21,945 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:17:21,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:17:21,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:21,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:17:21,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:17:21,946 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 16 states. [2019-12-27 23:17:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:22,387 INFO L93 Difference]: Finished difference Result 464 states and 1042 transitions. [2019-12-27 23:17:22,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:17:22,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:17:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:22,389 INFO L225 Difference]: With dead ends: 464 [2019-12-27 23:17:22,389 INFO L226 Difference]: Without dead ends: 462 [2019-12-27 23:17:22,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=573, Invalid=1149, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:17:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-12-27 23:17:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 148. [2019-12-27 23:17:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:17:22,393 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:17:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:22,393 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:17:22,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:17:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:17:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:22,394 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:22,394 INFO L411 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:22,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:22,594 INFO L410 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1063384918, now seen corresponding path program 330 times [2019-12-27 23:17:22,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:22,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810472700] [2019-12-27 23:17:22,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:22,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810472700] [2019-12-27 23:17:22,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148789828] [2019-12-27 23:17:22,681 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:22,753 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:17:22,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:22,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:22,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 23:17:22,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:22,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2019-12-27 23:17:22,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562266407] [2019-12-27 23:17:22,779 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:22,780 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:22,782 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 37 transitions. [2019-12-27 23:17:22,782 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:22,782 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:22,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:22,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:22,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:22,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-12-27 23:17:22,783 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 23:17:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:23,120 INFO L93 Difference]: Finished difference Result 419 states and 943 transitions. [2019-12-27 23:17:23,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 23:17:23,121 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:23,121 INFO L225 Difference]: With dead ends: 419 [2019-12-27 23:17:23,122 INFO L226 Difference]: Without dead ends: 417 [2019-12-27 23:17:23,122 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=830, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 23:17:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-12-27 23:17:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 148. [2019-12-27 23:17:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 366 transitions. [2019-12-27 23:17:23,126 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 366 transitions. Word has length 19 [2019-12-27 23:17:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:23,126 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 366 transitions. [2019-12-27 23:17:23,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 366 transitions. [2019-12-27 23:17:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:23,126 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:23,127 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:23,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:23,327 INFO L410 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:23,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:23,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1830537917, now seen corresponding path program 331 times [2019-12-27 23:17:23,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:23,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460005732] [2019-12-27 23:17:23,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:23,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460005732] [2019-12-27 23:17:23,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697350629] [2019-12-27 23:17:23,403 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:23,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:23,463 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:23,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:23,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:23,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1217079172] [2019-12-27 23:17:23,535 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:23,536 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:23,538 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 23:17:23,538 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:23,538 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:23,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:23,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:23,539 INFO L87 Difference]: Start difference. First operand 148 states and 366 transitions. Second operand 14 states. [2019-12-27 23:17:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:23,930 INFO L93 Difference]: Finished difference Result 472 states and 1061 transitions. [2019-12-27 23:17:23,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:17:23,930 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:23,931 INFO L225 Difference]: With dead ends: 472 [2019-12-27 23:17:23,931 INFO L226 Difference]: Without dead ends: 470 [2019-12-27 23:17:23,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:17:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-12-27 23:17:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 147. [2019-12-27 23:17:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:23,935 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:23,935 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:23,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:23,935 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:23,935 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:24,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:24,136 INFO L410 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:24,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1546090249, now seen corresponding path program 332 times [2019-12-27 23:17:24,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:24,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358622334] [2019-12-27 23:17:24,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:24,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358622334] [2019-12-27 23:17:24,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489119899] [2019-12-27 23:17:24,214 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:24,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:24,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:24,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:24,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:24,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:24,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:24,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1582869356] [2019-12-27 23:17:24,313 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:24,314 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:24,315 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:24,316 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:24,316 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:24,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:24,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:24,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:24,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:24,317 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:17:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:24,732 INFO L93 Difference]: Finished difference Result 482 states and 1088 transitions. [2019-12-27 23:17:24,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:17:24,733 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:24,734 INFO L225 Difference]: With dead ends: 482 [2019-12-27 23:17:24,734 INFO L226 Difference]: Without dead ends: 480 [2019-12-27 23:17:24,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:17:24,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2019-12-27 23:17:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 144. [2019-12-27 23:17:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 23:17:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 351 transitions. [2019-12-27 23:17:24,740 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 351 transitions. Word has length 19 [2019-12-27 23:17:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:24,740 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 351 transitions. [2019-12-27 23:17:24,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 351 transitions. [2019-12-27 23:17:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:24,741 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:24,741 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:24,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:24,945 INFO L410 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash 193974416, now seen corresponding path program 333 times [2019-12-27 23:17:24,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:24,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149363999] [2019-12-27 23:17:24,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:25,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149363999] [2019-12-27 23:17:25,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114551647] [2019-12-27 23:17:25,019 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:25,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:17:25,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:25,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:25,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:25,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:25,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:25,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1656557004] [2019-12-27 23:17:25,119 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:25,120 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:25,121 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:25,121 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:25,151 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:17:25,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:17:25,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:25,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:17:25,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:25,152 INFO L87 Difference]: Start difference. First operand 144 states and 351 transitions. Second operand 16 states. [2019-12-27 23:17:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:25,626 INFO L93 Difference]: Finished difference Result 499 states and 1121 transitions. [2019-12-27 23:17:25,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 23:17:25,626 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:17:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:25,627 INFO L225 Difference]: With dead ends: 499 [2019-12-27 23:17:25,627 INFO L226 Difference]: Without dead ends: 497 [2019-12-27 23:17:25,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=586, Invalid=1394, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 23:17:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2019-12-27 23:17:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 147. [2019-12-27 23:17:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:25,632 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:25,632 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:25,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:17:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:25,633 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:25,633 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:25,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:25,833 INFO L410 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1152619005, now seen corresponding path program 334 times [2019-12-27 23:17:25,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:25,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556257378] [2019-12-27 23:17:25,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:25,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556257378] [2019-12-27 23:17:25,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120500252] [2019-12-27 23:17:25,910 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:25,972 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:25,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:25,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:25,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:17:26,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:26,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:26,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [443200629] [2019-12-27 23:17:26,006 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:26,015 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:26,017 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 23:17:26,017 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:26,017 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:26,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:26,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:26,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:26,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:26,018 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:17:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:26,422 INFO L93 Difference]: Finished difference Result 491 states and 1106 transitions. [2019-12-27 23:17:26,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:17:26,423 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:26,424 INFO L225 Difference]: With dead ends: 491 [2019-12-27 23:17:26,424 INFO L226 Difference]: Without dead ends: 489 [2019-12-27 23:17:26,425 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:17:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2019-12-27 23:17:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 146. [2019-12-27 23:17:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:17:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:17:26,429 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:17:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:26,429 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:17:26,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:17:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:26,429 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:26,430 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:26,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:26,632 INFO L410 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash -248425456, now seen corresponding path program 335 times [2019-12-27 23:17:26,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:26,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553735644] [2019-12-27 23:17:26,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:26,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553735644] [2019-12-27 23:17:26,710 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327073696] [2019-12-27 23:17:26,710 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:26,771 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 23:17:26,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:26,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:26,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:17:26,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:26,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:17:26,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1666713429] [2019-12-27 23:17:26,823 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:26,824 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:26,826 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 23:17:26,826 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:26,826 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:26,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:26,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:26,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:26,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:17:26,826 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 23:17:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:27,211 INFO L93 Difference]: Finished difference Result 502 states and 1134 transitions. [2019-12-27 23:17:27,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:17:27,211 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:27,212 INFO L225 Difference]: With dead ends: 502 [2019-12-27 23:17:27,212 INFO L226 Difference]: Without dead ends: 500 [2019-12-27 23:17:27,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=451, Invalid=1189, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:17:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-12-27 23:17:27,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 143. [2019-12-27 23:17:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:17:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2019-12-27 23:17:27,216 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 19 [2019-12-27 23:17:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:27,217 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2019-12-27 23:17:27,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2019-12-27 23:17:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:27,217 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:27,217 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:27,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:27,418 INFO L410 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:27,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:27,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2045384630, now seen corresponding path program 336 times [2019-12-27 23:17:27,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:27,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770392617] [2019-12-27 23:17:27,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:27,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770392617] [2019-12-27 23:17:27,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862051219] [2019-12-27 23:17:27,498 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:27,562 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 23:17:27,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:27,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:27,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:27,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:27,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:17:27,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [632151921] [2019-12-27 23:17:27,631 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:27,632 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:27,634 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:27,634 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:27,669 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 23:17:27,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 23:17:27,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 23:17:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:17:27,670 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand 16 states. [2019-12-27 23:17:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:28,192 INFO L93 Difference]: Finished difference Result 495 states and 1101 transitions. [2019-12-27 23:17:28,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 23:17:28,193 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-12-27 23:17:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:28,194 INFO L225 Difference]: With dead ends: 495 [2019-12-27 23:17:28,194 INFO L226 Difference]: Without dead ends: 493 [2019-12-27 23:17:28,194 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=604, Invalid=1558, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 23:17:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2019-12-27 23:17:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 147. [2019-12-27 23:17:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 362 transitions. [2019-12-27 23:17:28,198 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 362 transitions. Word has length 19 [2019-12-27 23:17:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:28,199 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 362 transitions. [2019-12-27 23:17:28,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 23:17:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 362 transitions. [2019-12-27 23:17:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:28,199 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:28,199 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:28,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:28,400 INFO L410 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1086740041, now seen corresponding path program 337 times [2019-12-27 23:17:28,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:28,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867499071] [2019-12-27 23:17:28,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:28,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867499071] [2019-12-27 23:17:28,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821040879] [2019-12-27 23:17:28,481 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:28,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:28,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:17:28,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:28,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:28,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1599907205] [2019-12-27 23:17:28,585 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:28,586 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:28,588 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 33 transitions. [2019-12-27 23:17:28,588 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:28,588 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:28,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:28,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:28,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:28,589 INFO L87 Difference]: Start difference. First operand 147 states and 362 transitions. Second operand 14 states. [2019-12-27 23:17:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:29,015 INFO L93 Difference]: Finished difference Result 473 states and 1052 transitions. [2019-12-27 23:17:29,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:17:29,016 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:29,017 INFO L225 Difference]: With dead ends: 473 [2019-12-27 23:17:29,017 INFO L226 Difference]: Without dead ends: 471 [2019-12-27 23:17:29,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=1117, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 23:17:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-12-27 23:17:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 146. [2019-12-27 23:17:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:17:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 358 transitions. [2019-12-27 23:17:29,020 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 358 transitions. Word has length 19 [2019-12-27 23:17:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:29,020 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 358 transitions. [2019-12-27 23:17:29,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 358 transitions. [2019-12-27 23:17:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:29,021 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:29,021 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:29,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:29,222 INFO L410 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:29,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:29,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1807182794, now seen corresponding path program 338 times [2019-12-27 23:17:29,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:29,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216970841] [2019-12-27 23:17:29,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:29,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216970841] [2019-12-27 23:17:29,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961642253] [2019-12-27 23:17:29,298 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:29,360 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:29,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:29,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:29,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:17:29,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:29,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2019-12-27 23:17:29,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [967505249] [2019-12-27 23:17:29,419 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:29,420 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:29,422 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 23:17:29,422 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:29,422 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:29,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:29,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:29,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:29,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:17:29,423 INFO L87 Difference]: Start difference. First operand 146 states and 358 transitions. Second operand 14 states. [2019-12-27 23:17:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:29,859 INFO L93 Difference]: Finished difference Result 502 states and 1121 transitions. [2019-12-27 23:17:29,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:17:29,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:29,861 INFO L225 Difference]: With dead ends: 502 [2019-12-27 23:17:29,861 INFO L226 Difference]: Without dead ends: 500 [2019-12-27 23:17:29,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=471, Invalid=1251, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 23:17:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-12-27 23:17:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 145. [2019-12-27 23:17:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:17:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 354 transitions. [2019-12-27 23:17:29,866 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 354 transitions. Word has length 19 [2019-12-27 23:17:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:29,866 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 354 transitions. [2019-12-27 23:17:29,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 354 transitions. [2019-12-27 23:17:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 23:17:29,866 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:29,866 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:30,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:30,067 INFO L410 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:30,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:30,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1569445372, now seen corresponding path program 339 times [2019-12-27 23:17:30,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:30,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436271840] [2019-12-27 23:17:30,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:30,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436271840] [2019-12-27 23:17:30,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589701145] [2019-12-27 23:17:30,144 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:30,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 23:17:30,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:30,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:30,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-27 23:17:30,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:30,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2019-12-27 23:17:30,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [381665781] [2019-12-27 23:17:30,296 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:30,297 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:30,300 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 29 transitions. [2019-12-27 23:17:30,301 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:30,301 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 23:17:30,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 23:17:30,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:30,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 23:17:30,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:30,302 INFO L87 Difference]: Start difference. First operand 145 states and 354 transitions. Second operand 14 states. [2019-12-27 23:17:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:30,743 INFO L93 Difference]: Finished difference Result 506 states and 1113 transitions. [2019-12-27 23:17:30,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 23:17:30,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-12-27 23:17:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:30,745 INFO L225 Difference]: With dead ends: 506 [2019-12-27 23:17:30,745 INFO L226 Difference]: Without dead ends: 504 [2019-12-27 23:17:30,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=1175, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 23:17:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2019-12-27 23:17:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 133. [2019-12-27 23:17:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 23:17:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 318 transitions. [2019-12-27 23:17:30,750 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 318 transitions. Word has length 19 [2019-12-27 23:17:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:30,750 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 318 transitions. [2019-12-27 23:17:30,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 23:17:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 318 transitions. [2019-12-27 23:17:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:30,750 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:30,751 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:30,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:30,951 INFO L410 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:30,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1421733964, now seen corresponding path program 340 times [2019-12-27 23:17:30,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:30,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175330199] [2019-12-27 23:17:30,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:31,036 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 23:17:31,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175330199] [2019-12-27 23:17:31,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073822897] [2019-12-27 23:17:31,037 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:31,095 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:31,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:31,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:17:31,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:31,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:31,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 23:17:31,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [683486114] [2019-12-27 23:17:31,153 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:31,154 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:31,157 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 50 transitions. [2019-12-27 23:17:31,157 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:31,157 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:31,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:31,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:31,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:17:31,158 INFO L87 Difference]: Start difference. First operand 133 states and 318 transitions. Second operand 15 states. [2019-12-27 23:17:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:31,727 INFO L93 Difference]: Finished difference Result 601 states and 1239 transitions. [2019-12-27 23:17:31,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 23:17:31,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:31,729 INFO L225 Difference]: With dead ends: 601 [2019-12-27 23:17:31,729 INFO L226 Difference]: Without dead ends: 595 [2019-12-27 23:17:31,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=692, Invalid=1858, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 23:17:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-12-27 23:17:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 140. [2019-12-27 23:17:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 23:17:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 333 transitions. [2019-12-27 23:17:31,733 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 333 transitions. Word has length 20 [2019-12-27 23:17:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:31,733 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 333 transitions. [2019-12-27 23:17:31,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 333 transitions. [2019-12-27 23:17:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:31,734 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:31,734 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:31,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:31,934 INFO L410 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:31,935 INFO L82 PathProgramCache]: Analyzing trace with hash 203644980, now seen corresponding path program 341 times [2019-12-27 23:17:31,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:31,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129113090] [2019-12-27 23:17:31,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:32,025 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 23:17:32,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129113090] [2019-12-27 23:17:32,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324174091] [2019-12-27 23:17:32,026 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:32,071 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:17:32,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:32,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:32,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-12-27 23:17:32,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:32,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 23:17:32,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1117427021] [2019-12-27 23:17:32,100 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:32,101 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:32,104 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 44 transitions. [2019-12-27 23:17:32,104 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:32,148 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:32,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:17:32,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:32,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:17:32,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:32,149 INFO L87 Difference]: Start difference. First operand 140 states and 333 transitions. Second operand 17 states. [2019-12-27 23:17:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:32,836 INFO L93 Difference]: Finished difference Result 542 states and 1159 transitions. [2019-12-27 23:17:32,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-27 23:17:32,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 23:17:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:32,837 INFO L225 Difference]: With dead ends: 542 [2019-12-27 23:17:32,838 INFO L226 Difference]: Without dead ends: 540 [2019-12-27 23:17:32,838 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=845, Invalid=1911, Unknown=0, NotChecked=0, Total=2756 [2019-12-27 23:17:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2019-12-27 23:17:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 144. [2019-12-27 23:17:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 23:17:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 346 transitions. [2019-12-27 23:17:32,842 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 346 transitions. Word has length 20 [2019-12-27 23:17:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:32,842 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 346 transitions. [2019-12-27 23:17:32,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:17:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 346 transitions. [2019-12-27 23:17:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:32,842 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:32,842 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:33,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:33,043 INFO L410 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:33,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1162289569, now seen corresponding path program 342 times [2019-12-27 23:17:33,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:33,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081095414] [2019-12-27 23:17:33,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:33,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081095414] [2019-12-27 23:17:33,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099007160] [2019-12-27 23:17:33,136 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:33,207 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:17:33,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:33,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:33,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:17:33,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:33,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:33,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [57625877] [2019-12-27 23:17:33,258 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:33,259 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:33,271 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 50 transitions. [2019-12-27 23:17:33,272 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:33,272 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:33,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:33,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:33,272 INFO L87 Difference]: Start difference. First operand 144 states and 346 transitions. Second operand 15 states. [2019-12-27 23:17:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:33,853 INFO L93 Difference]: Finished difference Result 526 states and 1130 transitions. [2019-12-27 23:17:33,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 23:17:33,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:33,854 INFO L225 Difference]: With dead ends: 526 [2019-12-27 23:17:33,854 INFO L226 Difference]: Without dead ends: 524 [2019-12-27 23:17:33,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=679, Invalid=1771, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 23:17:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2019-12-27 23:17:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 143. [2019-12-27 23:17:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:17:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 342 transitions. [2019-12-27 23:17:33,857 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 342 transitions. Word has length 20 [2019-12-27 23:17:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:33,857 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 342 transitions. [2019-12-27 23:17:33,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:33,858 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 342 transitions. [2019-12-27 23:17:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:33,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:33,858 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:34,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:34,059 INFO L410 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:34,059 INFO L82 PathProgramCache]: Analyzing trace with hash -238754892, now seen corresponding path program 343 times [2019-12-27 23:17:34,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:34,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751022451] [2019-12-27 23:17:34,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:34,144 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 23:17:34,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751022451] [2019-12-27 23:17:34,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932334278] [2019-12-27 23:17:34,145 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:34,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:17:34,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:17:34,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:34,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 23:17:34,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1748458122] [2019-12-27 23:17:34,265 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:34,266 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:34,269 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 42 transitions. [2019-12-27 23:17:34,269 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:34,269 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:34,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:34,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:34,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:34,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:17:34,270 INFO L87 Difference]: Start difference. First operand 143 states and 342 transitions. Second operand 15 states. [2019-12-27 23:17:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:34,867 INFO L93 Difference]: Finished difference Result 540 states and 1162 transitions. [2019-12-27 23:17:34,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 23:17:34,867 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:34,868 INFO L225 Difference]: With dead ends: 540 [2019-12-27 23:17:34,869 INFO L226 Difference]: Without dead ends: 538 [2019-12-27 23:17:34,869 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=692, Invalid=1858, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 23:17:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-12-27 23:17:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 138. [2019-12-27 23:17:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 23:17:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 326 transitions. [2019-12-27 23:17:34,873 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 326 transitions. Word has length 20 [2019-12-27 23:17:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:34,873 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 326 transitions. [2019-12-27 23:17:34,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 326 transitions. [2019-12-27 23:17:34,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:34,874 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:34,874 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:35,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:35,074 INFO L410 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:35,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1175285580, now seen corresponding path program 344 times [2019-12-27 23:17:35,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:35,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711472262] [2019-12-27 23:17:35,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:35,158 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 23:17:35,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711472262] [2019-12-27 23:17:35,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345004590] [2019-12-27 23:17:35,159 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 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:35,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:35,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:35,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:35,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:17:35,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:35,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 23:17:35,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1627672298] [2019-12-27 23:17:35,249 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:35,249 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:35,251 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 44 transitions. [2019-12-27 23:17:35,251 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:35,325 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:17:35,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 23:17:35,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:35,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 23:17:35,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:17:35,326 INFO L87 Difference]: Start difference. First operand 138 states and 326 transitions. Second operand 19 states. [2019-12-27 23:17:36,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:36,115 INFO L93 Difference]: Finished difference Result 542 states and 1169 transitions. [2019-12-27 23:17:36,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-12-27 23:17:36,115 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2019-12-27 23:17:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:36,116 INFO L225 Difference]: With dead ends: 542 [2019-12-27 23:17:36,116 INFO L226 Difference]: Without dead ends: 540 [2019-12-27 23:17:36,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1034, Invalid=2272, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 23:17:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2019-12-27 23:17:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 146. [2019-12-27 23:17:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:17:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 351 transitions. [2019-12-27 23:17:36,121 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 351 transitions. Word has length 20 [2019-12-27 23:17:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:36,121 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 351 transitions. [2019-12-27 23:17:36,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 23:17:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 351 transitions. [2019-12-27 23:17:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:36,121 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:36,121 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:36,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:36,322 INFO L410 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:36,323 INFO L82 PathProgramCache]: Analyzing trace with hash 959163105, now seen corresponding path program 345 times [2019-12-27 23:17:36,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:36,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807921072] [2019-12-27 23:17:36,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:36,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807921072] [2019-12-27 23:17:36,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834373215] [2019-12-27 23:17:36,410 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:36,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:17:36,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:36,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:36,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-12-27 23:17:36,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:36,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:36,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [790258881] [2019-12-27 23:17:36,528 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:36,528 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:36,530 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 23:17:36,530 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:36,560 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:36,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:17:36,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:36,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:17:36,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:17:36,560 INFO L87 Difference]: Start difference. First operand 146 states and 351 transitions. Second operand 17 states. [2019-12-27 23:17:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:37,232 INFO L93 Difference]: Finished difference Result 505 states and 1095 transitions. [2019-12-27 23:17:37,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-12-27 23:17:37,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 23:17:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:37,234 INFO L225 Difference]: With dead ends: 505 [2019-12-27 23:17:37,234 INFO L226 Difference]: Without dead ends: 503 [2019-12-27 23:17:37,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2019-12-27 23:17:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2019-12-27 23:17:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 147. [2019-12-27 23:17:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 355 transitions. [2019-12-27 23:17:37,239 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 355 transitions. Word has length 20 [2019-12-27 23:17:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:37,239 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 355 transitions. [2019-12-27 23:17:37,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:17:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 355 transitions. [2019-12-27 23:17:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:37,239 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:37,239 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:37,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:37,440 INFO L410 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1917807694, now seen corresponding path program 346 times [2019-12-27 23:17:37,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:37,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241092215] [2019-12-27 23:17:37,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:37,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241092215] [2019-12-27 23:17:37,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065337593] [2019-12-27 23:17:37,536 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:37,602 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:37,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:37,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:37,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-12-27 23:17:37,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:37,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 23:17:37,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [427511392] [2019-12-27 23:17:37,639 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:37,639 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:37,642 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 50 transitions. [2019-12-27 23:17:37,642 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:37,642 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:37,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:37,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:37,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:37,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:17:37,642 INFO L87 Difference]: Start difference. First operand 147 states and 355 transitions. Second operand 15 states. [2019-12-27 23:17:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:38,170 INFO L93 Difference]: Finished difference Result 471 states and 1025 transitions. [2019-12-27 23:17:38,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:17:38,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:38,172 INFO L225 Difference]: With dead ends: 471 [2019-12-27 23:17:38,172 INFO L226 Difference]: Without dead ends: 469 [2019-12-27 23:17:38,172 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:17:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2019-12-27 23:17:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 147. [2019-12-27 23:17:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:17:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 355 transitions. [2019-12-27 23:17:38,176 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 355 transitions. Word has length 20 [2019-12-27 23:17:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:38,176 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 355 transitions. [2019-12-27 23:17:38,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 355 transitions. [2019-12-27 23:17:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:38,176 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:38,176 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:38,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:38,377 INFO L410 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:38,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash 516763233, now seen corresponding path program 347 times [2019-12-27 23:17:38,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:38,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182674808] [2019-12-27 23:17:38,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:38,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182674808] [2019-12-27 23:17:38,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735211230] [2019-12-27 23:17:38,477 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:38,525 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:17:38,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:38,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:38,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:17:38,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:38,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:38,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2028587554] [2019-12-27 23:17:38,569 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:38,570 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:38,573 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 38 transitions. [2019-12-27 23:17:38,573 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:38,573 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:38,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:38,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:38,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:38,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:38,574 INFO L87 Difference]: Start difference. First operand 147 states and 355 transitions. Second operand 15 states. [2019-12-27 23:17:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:39,141 INFO L93 Difference]: Finished difference Result 506 states and 1105 transitions. [2019-12-27 23:17:39,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 23:17:39,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:39,143 INFO L225 Difference]: With dead ends: 506 [2019-12-27 23:17:39,143 INFO L226 Difference]: Without dead ends: 504 [2019-12-27 23:17:39,143 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=679, Invalid=1771, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 23:17:39,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2019-12-27 23:17:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 146. [2019-12-27 23:17:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:17:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 351 transitions. [2019-12-27 23:17:39,148 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 351 transitions. Word has length 20 [2019-12-27 23:17:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:39,148 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 351 transitions. [2019-12-27 23:17:39,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 351 transitions. [2019-12-27 23:17:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:39,148 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:39,148 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:39,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:39,349 INFO L410 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1435102363, now seen corresponding path program 348 times [2019-12-27 23:17:39,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:39,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532387089] [2019-12-27 23:17:39,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:39,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532387089] [2019-12-27 23:17:39,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794621392] [2019-12-27 23:17:39,448 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:39,518 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:17:39,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:39,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:39,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:39,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:39,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:39,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [634350597] [2019-12-27 23:17:39,572 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:39,572 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:39,574 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 23:17:39,575 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:39,575 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:39,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:39,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:39,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:39,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:39,575 INFO L87 Difference]: Start difference. First operand 146 states and 351 transitions. Second operand 15 states. [2019-12-27 23:17:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:40,163 INFO L93 Difference]: Finished difference Result 508 states and 1106 transitions. [2019-12-27 23:17:40,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 23:17:40,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:40,165 INFO L225 Difference]: With dead ends: 508 [2019-12-27 23:17:40,165 INFO L226 Difference]: Without dead ends: 506 [2019-12-27 23:17:40,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=679, Invalid=1771, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 23:17:40,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2019-12-27 23:17:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 143. [2019-12-27 23:17:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:17:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 340 transitions. [2019-12-27 23:17:40,169 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 340 transitions. Word has length 20 [2019-12-27 23:17:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:40,170 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 340 transitions. [2019-12-27 23:17:40,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 340 transitions. [2019-12-27 23:17:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:40,170 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:40,170 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:40,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:40,371 INFO L410 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:40,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1119800268, now seen corresponding path program 349 times [2019-12-27 23:17:40,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:40,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410656465] [2019-12-27 23:17:40,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:40,465 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 23:17:40,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410656465] [2019-12-27 23:17:40,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176559249] [2019-12-27 23:17:40,466 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:40,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:40,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-27 23:17:40,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:40,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 23:17:40,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [905953393] [2019-12-27 23:17:40,555 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:40,556 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:40,558 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 23:17:40,558 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:40,588 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:40,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:17:40,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:40,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:17:40,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:40,589 INFO L87 Difference]: Start difference. First operand 143 states and 340 transitions. Second operand 17 states. [2019-12-27 23:17:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:41,227 INFO L93 Difference]: Finished difference Result 520 states and 1123 transitions. [2019-12-27 23:17:41,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-27 23:17:41,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 23:17:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:41,228 INFO L225 Difference]: With dead ends: 520 [2019-12-27 23:17:41,229 INFO L226 Difference]: Without dead ends: 518 [2019-12-27 23:17:41,229 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=817, Invalid=1835, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 23:17:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2019-12-27 23:17:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 146. [2019-12-27 23:17:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 23:17:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 351 transitions. [2019-12-27 23:17:41,234 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 351 transitions. Word has length 20 [2019-12-27 23:17:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:41,234 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 351 transitions. [2019-12-27 23:17:41,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:17:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 351 transitions. [2019-12-27 23:17:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:41,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:41,235 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:41,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:41,436 INFO L410 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:41,436 INFO L82 PathProgramCache]: Analyzing trace with hash -161155679, now seen corresponding path program 350 times [2019-12-27 23:17:41,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:41,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481316474] [2019-12-27 23:17:41,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:41,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481316474] [2019-12-27 23:17:41,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18230867] [2019-12-27 23:17:41,525 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:41,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:41,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:41,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:41,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:17:41,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:41,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:41,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [926921206] [2019-12-27 23:17:41,634 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:41,634 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:41,636 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 42 transitions. [2019-12-27 23:17:41,637 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:41,637 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:41,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:41,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:41,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:41,637 INFO L87 Difference]: Start difference. First operand 146 states and 351 transitions. Second operand 15 states. [2019-12-27 23:17:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:42,232 INFO L93 Difference]: Finished difference Result 514 states and 1114 transitions. [2019-12-27 23:17:42,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-12-27 23:17:42,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:42,233 INFO L225 Difference]: With dead ends: 514 [2019-12-27 23:17:42,233 INFO L226 Difference]: Without dead ends: 512 [2019-12-27 23:17:42,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=679, Invalid=1771, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 23:17:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2019-12-27 23:17:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 145. [2019-12-27 23:17:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:17:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 347 transitions. [2019-12-27 23:17:42,238 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 347 transitions. Word has length 20 [2019-12-27 23:17:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:42,238 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 347 transitions. [2019-12-27 23:17:42,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 347 transitions. [2019-12-27 23:17:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:42,239 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:42,239 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:42,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:42,440 INFO L410 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:42,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1562200140, now seen corresponding path program 351 times [2019-12-27 23:17:42,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:42,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107359138] [2019-12-27 23:17:42,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:42,524 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 23:17:42,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107359138] [2019-12-27 23:17:42,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978675885] [2019-12-27 23:17:42,524 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:42,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-27 23:17:42,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:42,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:17:42,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:17:42,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:42,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 23:17:42,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1073875047] [2019-12-27 23:17:42,653 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:42,653 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:42,655 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 38 transitions. [2019-12-27 23:17:42,656 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:42,656 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:42,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:42,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:42,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:42,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2019-12-27 23:17:42,656 INFO L87 Difference]: Start difference. First operand 145 states and 347 transitions. Second operand 15 states. [2019-12-27 23:17:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:43,208 INFO L93 Difference]: Finished difference Result 523 states and 1135 transitions. [2019-12-27 23:17:43,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 23:17:43,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:43,210 INFO L225 Difference]: With dead ends: 523 [2019-12-27 23:17:43,210 INFO L226 Difference]: Without dead ends: 521 [2019-12-27 23:17:43,211 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=668, Invalid=1782, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 23:17:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2019-12-27 23:17:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 136. [2019-12-27 23:17:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 23:17:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 319 transitions. [2019-12-27 23:17:43,214 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 319 transitions. Word has length 20 [2019-12-27 23:17:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:43,214 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 319 transitions. [2019-12-27 23:17:43,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 319 transitions. [2019-12-27 23:17:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:43,215 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:43,215 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:43,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:43,415 INFO L410 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash 817340724, now seen corresponding path program 352 times [2019-12-27 23:17:43,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:43,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751147097] [2019-12-27 23:17:43,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:43,502 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 23:17:43,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751147097] [2019-12-27 23:17:43,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938205196] [2019-12-27 23:17:43,503 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:43,561 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:43,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:43,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:17:43,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:43,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:43,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 23:17:43,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [271114668] [2019-12-27 23:17:43,618 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:43,619 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:43,621 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 44 transitions. [2019-12-27 23:17:43,621 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:43,720 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 23:17:43,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 23:17:43,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:43,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 23:17:43,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2019-12-27 23:17:43,721 INFO L87 Difference]: Start difference. First operand 136 states and 319 transitions. Second operand 21 states. [2019-12-27 23:17:44,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:44,805 INFO L93 Difference]: Finished difference Result 554 states and 1213 transitions. [2019-12-27 23:17:44,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-12-27 23:17:44,806 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-12-27 23:17:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:44,807 INFO L225 Difference]: With dead ends: 554 [2019-12-27 23:17:44,807 INFO L226 Difference]: Without dead ends: 552 [2019-12-27 23:17:44,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1261, Invalid=3295, Unknown=0, NotChecked=0, Total=4556 [2019-12-27 23:17:44,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2019-12-27 23:17:44,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 148. [2019-12-27 23:17:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 23:17:44,811 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 23:17:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:44,812 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 23:17:44,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 23:17:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 23:17:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:44,812 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:44,812 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:45,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:45,013 INFO L410 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash -971840479, now seen corresponding path program 353 times [2019-12-27 23:17:45,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:45,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574578045] [2019-12-27 23:17:45,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:45,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574578045] [2019-12-27 23:17:45,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20340636] [2019-12-27 23:17:45,101 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:45,145 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 23:17:45,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:45,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:45,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:17:45,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:45,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:45,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [126278292] [2019-12-27 23:17:45,192 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:45,193 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:45,195 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 23:17:45,195 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:45,263 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:17:45,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 23:17:45,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 23:17:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:17:45,264 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 19 states. [2019-12-27 23:17:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:46,071 INFO L93 Difference]: Finished difference Result 508 states and 1120 transitions. [2019-12-27 23:17:46,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-12-27 23:17:46,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2019-12-27 23:17:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:46,073 INFO L225 Difference]: With dead ends: 508 [2019-12-27 23:17:46,073 INFO L226 Difference]: Without dead ends: 506 [2019-12-27 23:17:46,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=991, Invalid=2315, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 23:17:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2019-12-27 23:17:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 149. [2019-12-27 23:17:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:17:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 23:17:46,078 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 23:17:46,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:46,078 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 23:17:46,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 23:17:46,078 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 23:17:46,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:46,078 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:46,078 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:46,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:46,279 INFO L410 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:46,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:46,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1162608206, now seen corresponding path program 354 times [2019-12-27 23:17:46,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:46,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109613720] [2019-12-27 23:17:46,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:46,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109613720] [2019-12-27 23:17:46,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137302833] [2019-12-27 23:17:46,397 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:46,471 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-27 23:17:46,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:46,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 23:17:46,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:46,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:46,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 22 [2019-12-27 23:17:46,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1490712890] [2019-12-27 23:17:46,548 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:46,549 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:46,551 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 23:17:46,552 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:46,586 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:46,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:17:46,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:46,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:17:46,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2019-12-27 23:17:46,587 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 17 states. [2019-12-27 23:17:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:47,255 INFO L93 Difference]: Finished difference Result 458 states and 1021 transitions. [2019-12-27 23:17:47,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 23:17:47,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 23:17:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:47,256 INFO L225 Difference]: With dead ends: 458 [2019-12-27 23:17:47,256 INFO L226 Difference]: Without dead ends: 456 [2019-12-27 23:17:47,256 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=2074, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 23:17:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2019-12-27 23:17:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 151. [2019-12-27 23:17:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 23:17:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 368 transitions. [2019-12-27 23:17:47,260 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 368 transitions. Word has length 20 [2019-12-27 23:17:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:47,260 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 368 transitions. [2019-12-27 23:17:47,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:17:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 368 transitions. [2019-12-27 23:17:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:47,261 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:47,261 INFO L411 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:47,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:47,462 INFO L410 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2121252795, now seen corresponding path program 355 times [2019-12-27 23:17:47,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:47,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876515945] [2019-12-27 23:17:47,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:47,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876515945] [2019-12-27 23:17:47,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671013343] [2019-12-27 23:17:47,556 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:47,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:47,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-12-27 23:17:47,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:47,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 23:17:47,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1703248500] [2019-12-27 23:17:47,649 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:47,649 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:47,651 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 50 transitions. [2019-12-27 23:17:47,652 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:47,652 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:47,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:47,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:47,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:17:47,652 INFO L87 Difference]: Start difference. First operand 151 states and 368 transitions. Second operand 15 states. [2019-12-27 23:17:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:48,063 INFO L93 Difference]: Finished difference Result 403 states and 905 transitions. [2019-12-27 23:17:48,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 23:17:48,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:48,065 INFO L225 Difference]: With dead ends: 403 [2019-12-27 23:17:48,065 INFO L226 Difference]: Without dead ends: 401 [2019-12-27 23:17:48,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=452, Invalid=1030, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 23:17:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2019-12-27 23:17:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 151. [2019-12-27 23:17:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 23:17:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 368 transitions. [2019-12-27 23:17:48,069 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 368 transitions. Word has length 20 [2019-12-27 23:17:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:48,069 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 368 transitions. [2019-12-27 23:17:48,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 368 transitions. [2019-12-27 23:17:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:48,069 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:48,069 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:48,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:48,270 INFO L410 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:48,271 INFO L82 PathProgramCache]: Analyzing trace with hash 720208334, now seen corresponding path program 356 times [2019-12-27 23:17:48,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:48,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365085124] [2019-12-27 23:17:48,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:48,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365085124] [2019-12-27 23:17:48,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975196175] [2019-12-27 23:17:48,359 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:48,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:48,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:48,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:48,421 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:17:48,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:48,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 23:17:48,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [29572846] [2019-12-27 23:17:48,458 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:48,458 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:48,460 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 23:17:48,460 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:48,460 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:48,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:48,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:48,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:17:48,461 INFO L87 Difference]: Start difference. First operand 151 states and 368 transitions. Second operand 15 states. [2019-12-27 23:17:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:48,973 INFO L93 Difference]: Finished difference Result 457 states and 1032 transitions. [2019-12-27 23:17:48,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:17:48,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:48,975 INFO L225 Difference]: With dead ends: 457 [2019-12-27 23:17:48,975 INFO L226 Difference]: Without dead ends: 455 [2019-12-27 23:17:48,975 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:17:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-12-27 23:17:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 150. [2019-12-27 23:17:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 23:17:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 364 transitions. [2019-12-27 23:17:48,979 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 364 transitions. Word has length 20 [2019-12-27 23:17:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:48,979 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 364 transitions. [2019-12-27 23:17:48,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 364 transitions. [2019-12-27 23:17:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:48,979 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:48,979 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:49,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:49,180 INFO L410 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1638547464, now seen corresponding path program 357 times [2019-12-27 23:17:49,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:49,181 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064233651] [2019-12-27 23:17:49,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:49,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064233651] [2019-12-27 23:17:49,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424334766] [2019-12-27 23:17:49,272 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:49,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 23:17:49,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:49,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:49,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-12-27 23:17:49,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:49,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 23:17:49,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1509864313] [2019-12-27 23:17:49,376 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:49,377 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:49,379 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 23:17:49,379 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:49,379 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:49,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:49,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:17:49,379 INFO L87 Difference]: Start difference. First operand 150 states and 364 transitions. Second operand 15 states. [2019-12-27 23:17:49,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:49,889 INFO L93 Difference]: Finished difference Result 464 states and 1045 transitions. [2019-12-27 23:17:49,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:17:49,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:49,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:49,890 INFO L225 Difference]: With dead ends: 464 [2019-12-27 23:17:49,890 INFO L226 Difference]: Without dead ends: 462 [2019-12-27 23:17:49,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:17:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-12-27 23:17:49,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 149. [2019-12-27 23:17:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:17:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 23:17:49,894 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 23:17:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:49,894 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 23:17:49,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 23:17:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:49,894 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:49,894 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:50,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:50,095 INFO L410 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:50,096 INFO L82 PathProgramCache]: Analyzing trace with hash -916355167, now seen corresponding path program 358 times [2019-12-27 23:17:50,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:50,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603203395] [2019-12-27 23:17:50,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:50,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603203395] [2019-12-27 23:17:50,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286372454] [2019-12-27 23:17:50,183 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:50,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:50,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:50,251 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:50,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:50,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:50,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:50,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1661343129] [2019-12-27 23:17:50,305 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:50,306 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:50,308 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 23:17:50,308 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:50,341 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:50,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:17:50,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:50,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:17:50,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:17:50,342 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 17 states. [2019-12-27 23:17:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:50,934 INFO L93 Difference]: Finished difference Result 492 states and 1097 transitions. [2019-12-27 23:17:50,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-12-27 23:17:50,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 23:17:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:50,935 INFO L225 Difference]: With dead ends: 492 [2019-12-27 23:17:50,935 INFO L226 Difference]: Without dead ends: 490 [2019-12-27 23:17:50,936 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=758, Invalid=1894, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 23:17:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-12-27 23:17:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 151. [2019-12-27 23:17:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 23:17:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-27 23:17:50,939 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 20 [2019-12-27 23:17:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:50,939 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-27 23:17:50,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:17:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-27 23:17:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:50,939 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:50,940 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:51,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:51,140 INFO L410 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash 42289422, now seen corresponding path program 359 times [2019-12-27 23:17:51,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:51,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809522772] [2019-12-27 23:17:51,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:51,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809522772] [2019-12-27 23:17:51,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114595630] [2019-12-27 23:17:51,228 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:51,276 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:17:51,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:51,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 23:17:51,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:17:51,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:51,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 22 [2019-12-27 23:17:51,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [865282292] [2019-12-27 23:17:51,353 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:51,354 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:51,356 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 38 transitions. [2019-12-27 23:17:51,356 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:51,356 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:51,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:51,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:17:51,356 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 15 states. [2019-12-27 23:17:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:51,874 INFO L93 Difference]: Finished difference Result 474 states and 1064 transitions. [2019-12-27 23:17:51,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:17:51,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:51,876 INFO L225 Difference]: With dead ends: 474 [2019-12-27 23:17:51,876 INFO L226 Difference]: Without dead ends: 472 [2019-12-27 23:17:51,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=615, Invalid=1737, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 23:17:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-12-27 23:17:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 151. [2019-12-27 23:17:51,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 23:17:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 367 transitions. [2019-12-27 23:17:51,880 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 367 transitions. Word has length 20 [2019-12-27 23:17:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:51,880 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 367 transitions. [2019-12-27 23:17:51,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:51,881 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 367 transitions. [2019-12-27 23:17:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:51,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:51,881 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:52,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:52,082 INFO L410 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1358755039, now seen corresponding path program 360 times [2019-12-27 23:17:52,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:52,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792224324] [2019-12-27 23:17:52,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:52,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792224324] [2019-12-27 23:17:52,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746099136] [2019-12-27 23:17:52,167 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:52,233 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:17:52,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:52,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:52,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:52,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:52,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:52,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1904760779] [2019-12-27 23:17:52,291 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:52,291 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:52,293 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 23:17:52,293 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:52,293 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:52,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:52,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:52,294 INFO L87 Difference]: Start difference. First operand 151 states and 367 transitions. Second operand 15 states. [2019-12-27 23:17:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:52,823 INFO L93 Difference]: Finished difference Result 500 states and 1118 transitions. [2019-12-27 23:17:52,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:17:52,823 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:52,824 INFO L225 Difference]: With dead ends: 500 [2019-12-27 23:17:52,825 INFO L226 Difference]: Without dead ends: 498 [2019-12-27 23:17:52,825 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=607, Invalid=1555, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 23:17:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2019-12-27 23:17:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 148. [2019-12-27 23:17:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 23:17:52,829 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 23:17:52,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:52,829 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 23:17:52,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 23:17:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:52,829 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:52,829 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:53,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:53,030 INFO L410 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:53,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1139253083, now seen corresponding path program 361 times [2019-12-27 23:17:53,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:53,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143645346] [2019-12-27 23:17:53,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:53,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143645346] [2019-12-27 23:17:53,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462009133] [2019-12-27 23:17:53,115 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:53,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:53,176 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:53,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:53,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:53,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [559085306] [2019-12-27 23:17:53,224 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:53,225 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:53,227 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 23:17:53,227 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:53,263 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:53,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:17:53,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:53,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:17:53,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:17:53,264 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 17 states. [2019-12-27 23:17:53,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:53,904 INFO L93 Difference]: Finished difference Result 485 states and 1079 transitions. [2019-12-27 23:17:53,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-27 23:17:53,904 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 23:17:53,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:53,905 INFO L225 Difference]: With dead ends: 485 [2019-12-27 23:17:53,905 INFO L226 Difference]: Without dead ends: 483 [2019-12-27 23:17:53,906 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=802, Invalid=1954, Unknown=0, NotChecked=0, Total=2756 [2019-12-27 23:17:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2019-12-27 23:17:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 149. [2019-12-27 23:17:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:17:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 23:17:53,910 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 23:17:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:53,910 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 23:17:53,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:17:53,910 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 23:17:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:53,910 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:53,910 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:54,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:54,111 INFO L410 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:54,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:54,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2097897672, now seen corresponding path program 362 times [2019-12-27 23:17:54,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:54,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537250582] [2019-12-27 23:17:54,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:54,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537250582] [2019-12-27 23:17:54,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070275409] [2019-12-27 23:17:54,201 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:54,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:54,267 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:54,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:54,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-27 23:17:54,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:54,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 23:17:54,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1425874721] [2019-12-27 23:17:54,306 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:54,307 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:54,310 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 23:17:54,310 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:54,310 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:54,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:54,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:54,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:54,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:17:54,311 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 15 states. [2019-12-27 23:17:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:54,830 INFO L93 Difference]: Finished difference Result 462 states and 1034 transitions. [2019-12-27 23:17:54,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:17:54,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:54,832 INFO L225 Difference]: With dead ends: 462 [2019-12-27 23:17:54,832 INFO L226 Difference]: Without dead ends: 460 [2019-12-27 23:17:54,832 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:17:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2019-12-27 23:17:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 149. [2019-12-27 23:17:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:17:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 23:17:54,836 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 23:17:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:54,837 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 23:17:54,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 23:17:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:54,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:54,837 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:55,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:55,038 INFO L410 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash 696853211, now seen corresponding path program 363 times [2019-12-27 23:17:55,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:55,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43140573] [2019-12-27 23:17:55,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:55,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43140573] [2019-12-27 23:17:55,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070348676] [2019-12-27 23:17:55,128 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:55,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:17:55,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:55,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:55,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:17:55,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:55,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:55,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1582757394] [2019-12-27 23:17:55,246 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:55,247 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:55,248 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 23:17:55,248 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:55,249 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:55,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:55,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:55,249 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 15 states. [2019-12-27 23:17:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:55,785 INFO L93 Difference]: Finished difference Result 483 states and 1081 transitions. [2019-12-27 23:17:55,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 23:17:55,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:55,787 INFO L225 Difference]: With dead ends: 483 [2019-12-27 23:17:55,787 INFO L226 Difference]: Without dead ends: 481 [2019-12-27 23:17:55,787 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 23:17:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2019-12-27 23:17:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 148. [2019-12-27 23:17:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 23:17:55,792 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 23:17:55,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:55,792 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 23:17:55,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 23:17:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:55,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:55,792 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:55,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:55,993 INFO L410 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1615192341, now seen corresponding path program 364 times [2019-12-27 23:17:55,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:55,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635221992] [2019-12-27 23:17:55,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:56,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635221992] [2019-12-27 23:17:56,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692395764] [2019-12-27 23:17:56,083 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:56,145 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:17:56,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:56,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:56,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:17:56,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:56,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:56,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1631552679] [2019-12-27 23:17:56,205 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:56,205 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:56,207 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 23:17:56,207 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:56,208 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:56,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:56,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:56,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:17:56,208 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 15 states. [2019-12-27 23:17:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:56,719 INFO L93 Difference]: Finished difference Result 492 states and 1095 transitions. [2019-12-27 23:17:56,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 23:17:56,719 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:56,720 INFO L225 Difference]: With dead ends: 492 [2019-12-27 23:17:56,720 INFO L226 Difference]: Without dead ends: 490 [2019-12-27 23:17:56,721 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1624, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 23:17:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-12-27 23:17:56,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 143. [2019-12-27 23:17:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 23:17:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 338 transitions. [2019-12-27 23:17:56,725 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 338 transitions. Word has length 20 [2019-12-27 23:17:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:56,725 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 338 transitions. [2019-12-27 23:17:56,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 338 transitions. [2019-12-27 23:17:56,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:56,726 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:56,726 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:56,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:56,927 INFO L410 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:56,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1695849292, now seen corresponding path program 365 times [2019-12-27 23:17:56,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:56,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706837302] [2019-12-27 23:17:56,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:57,013 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 23:17:57,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706837302] [2019-12-27 23:17:57,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439398178] [2019-12-27 23:17:57,014 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:57,059 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:17:57,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:57,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:17:57,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-27 23:17:57,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:57,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 23:17:57,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [555432473] [2019-12-27 23:17:57,088 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:57,088 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:57,090 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 40 transitions. [2019-12-27 23:17:57,090 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:57,151 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 23:17:57,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 23:17:57,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 23:17:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:17:57,152 INFO L87 Difference]: Start difference. First operand 143 states and 338 transitions. Second operand 19 states. [2019-12-27 23:17:57,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:57,953 INFO L93 Difference]: Finished difference Result 503 states and 1100 transitions. [2019-12-27 23:17:57,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-12-27 23:17:57,953 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2019-12-27 23:17:57,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:57,954 INFO L225 Difference]: With dead ends: 503 [2019-12-27 23:17:57,954 INFO L226 Difference]: Without dead ends: 501 [2019-12-27 23:17:57,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=999, Invalid=2193, Unknown=0, NotChecked=0, Total=3192 [2019-12-27 23:17:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2019-12-27 23:17:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 148. [2019-12-27 23:17:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:17:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 23:17:57,959 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 23:17:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:57,959 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 23:17:57,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 23:17:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 23:17:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:57,959 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:57,960 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:58,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:58,160 INFO L410 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:58,161 INFO L82 PathProgramCache]: Analyzing trace with hash 438599393, now seen corresponding path program 366 times [2019-12-27 23:17:58,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:58,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388929029] [2019-12-27 23:17:58,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:58,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388929029] [2019-12-27 23:17:58,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158817579] [2019-12-27 23:17:58,246 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:58,324 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-12-27 23:17:58,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:17:58,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:17:58,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:17:58,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:58,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:17:58,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1185297751] [2019-12-27 23:17:58,372 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:58,373 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:58,375 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 23:17:58,375 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:58,406 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:17:58,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:17:58,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:58,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:17:58,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 23:17:58,407 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 17 states. [2019-12-27 23:17:59,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:59,055 INFO L93 Difference]: Finished difference Result 483 states and 1069 transitions. [2019-12-27 23:17:59,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-12-27 23:17:59,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 23:17:59,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:59,057 INFO L225 Difference]: With dead ends: 483 [2019-12-27 23:17:59,057 INFO L226 Difference]: Without dead ends: 481 [2019-12-27 23:17:59,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=830, Invalid=2032, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 23:17:59,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2019-12-27 23:17:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 149. [2019-12-27 23:17:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:17:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 23:17:59,061 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 23:17:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:59,061 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 23:17:59,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:17:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 23:17:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:59,062 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:59,062 INFO L411 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:17:59,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:59,263 INFO L410 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:17:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:17:59,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1397243982, now seen corresponding path program 367 times [2019-12-27 23:17:59,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:17:59,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317872361] [2019-12-27 23:17:59,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:17:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:17:59,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317872361] [2019-12-27 23:17:59,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866938061] [2019-12-27 23:17:59,353 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:17:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:17:59,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-27 23:17:59,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:17:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-12-27 23:17:59,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:17:59,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 19 [2019-12-27 23:17:59,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1330109151] [2019-12-27 23:17:59,449 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:17:59,450 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:17:59,452 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 42 transitions. [2019-12-27 23:17:59,452 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:17:59,452 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:17:59,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:17:59,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:17:59,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:17:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-12-27 23:17:59,453 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 15 states. [2019-12-27 23:17:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:17:59,969 INFO L93 Difference]: Finished difference Result 456 states and 1015 transitions. [2019-12-27 23:17:59,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 23:17:59,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:17:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:17:59,970 INFO L225 Difference]: With dead ends: 456 [2019-12-27 23:17:59,970 INFO L226 Difference]: Without dead ends: 454 [2019-12-27 23:17:59,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:17:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2019-12-27 23:17:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 149. [2019-12-27 23:17:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 23:17:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 360 transitions. [2019-12-27 23:17:59,974 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 360 transitions. Word has length 20 [2019-12-27 23:17:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:17:59,975 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 360 transitions. [2019-12-27 23:17:59,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:17:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 360 transitions. [2019-12-27 23:17:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:17:59,975 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:17:59,975 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:18:00,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:00,176 INFO L410 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:18:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:18:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash -3800479, now seen corresponding path program 368 times [2019-12-27 23:18:00,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:18:00,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802080126] [2019-12-27 23:18:00,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:18:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:18:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:18:00,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802080126] [2019-12-27 23:18:00,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982520912] [2019-12-27 23:18:00,264 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:00,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 23:18:00,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:18:00,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:18:00,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:18:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-27 23:18:00,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:18:00,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:18:00,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1056814108] [2019-12-27 23:18:00,377 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:18:00,377 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:18:00,379 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 23:18:00,379 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:18:00,379 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:18:00,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:18:00,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:18:00,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:18:00,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:18:00,380 INFO L87 Difference]: Start difference. First operand 149 states and 360 transitions. Second operand 15 states. [2019-12-27 23:18:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:18:00,939 INFO L93 Difference]: Finished difference Result 480 states and 1070 transitions. [2019-12-27 23:18:00,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 23:18:00,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:18:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:18:00,940 INFO L225 Difference]: With dead ends: 480 [2019-12-27 23:18:00,940 INFO L226 Difference]: Without dead ends: 478 [2019-12-27 23:18:00,941 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 23:18:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2019-12-27 23:18:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 148. [2019-12-27 23:18:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:18:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 23:18:00,944 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 23:18:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:18:00,944 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 23:18:00,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:18:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 23:18:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:18:00,945 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:18:00,945 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:18:01,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:01,145 INFO L410 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:18:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:18:01,146 INFO L82 PathProgramCache]: Analyzing trace with hash 914538651, now seen corresponding path program 369 times [2019-12-27 23:18:01,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:18:01,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351708571] [2019-12-27 23:18:01,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:18:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:18:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:18:01,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351708571] [2019-12-27 23:18:01,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511391441] [2019-12-27 23:18:01,237 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 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:01,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 23:18:01,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:18:01,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:18:01,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:18:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-27 23:18:01,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:18:01,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:18:01,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1712706977] [2019-12-27 23:18:01,355 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:18:01,356 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:18:01,358 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 23:18:01,358 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:18:01,359 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:18:01,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:18:01,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:18:01,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:18:01,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:18:01,359 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 15 states. [2019-12-27 23:18:01,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:18:01,931 INFO L93 Difference]: Finished difference Result 478 states and 1062 transitions. [2019-12-27 23:18:01,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 23:18:01,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:18:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:18:01,932 INFO L225 Difference]: With dead ends: 478 [2019-12-27 23:18:01,932 INFO L226 Difference]: Without dead ends: 476 [2019-12-27 23:18:01,933 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 23:18:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2019-12-27 23:18:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 145. [2019-12-27 23:18:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 23:18:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 345 transitions. [2019-12-27 23:18:01,937 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 345 transitions. Word has length 20 [2019-12-27 23:18:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:18:01,937 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 345 transitions. [2019-12-27 23:18:01,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:18:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 345 transitions. [2019-12-27 23:18:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:18:01,938 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:18:01,938 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:18:02,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:02,141 INFO L410 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:18:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:18:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1640363980, now seen corresponding path program 370 times [2019-12-27 23:18:02,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:18:02,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015032268] [2019-12-27 23:18:02,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:18:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:18:02,228 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 23:18:02,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015032268] [2019-12-27 23:18:02,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641842752] [2019-12-27 23:18:02,229 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:02,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 23:18:02,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:18:02,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 23:18:02,293 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:18:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-27 23:18:02,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:18:02,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2019-12-27 23:18:02,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1216158631] [2019-12-27 23:18:02,347 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:18:02,349 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:18:02,351 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 36 transitions. [2019-12-27 23:18:02,351 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:18:02,380 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 23:18:02,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 23:18:02,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:18:02,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 23:18:02,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2019-12-27 23:18:02,381 INFO L87 Difference]: Start difference. First operand 145 states and 345 transitions. Second operand 17 states. [2019-12-27 23:18:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:18:03,030 INFO L93 Difference]: Finished difference Result 502 states and 1102 transitions. [2019-12-27 23:18:03,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-12-27 23:18:03,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-12-27 23:18:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:18:03,032 INFO L225 Difference]: With dead ends: 502 [2019-12-27 23:18:03,032 INFO L226 Difference]: Without dead ends: 500 [2019-12-27 23:18:03,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=797, Invalid=2065, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 23:18:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-12-27 23:18:03,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 148. [2019-12-27 23:18:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 23:18:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 356 transitions. [2019-12-27 23:18:03,036 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 356 transitions. Word has length 20 [2019-12-27 23:18:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:18:03,037 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 356 transitions. [2019-12-27 23:18:03,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 23:18:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 356 transitions. [2019-12-27 23:18:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:18:03,037 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:18:03,037 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:18:03,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:03,238 INFO L410 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:18:03,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:18:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash -681719391, now seen corresponding path program 371 times [2019-12-27 23:18:03,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:18:03,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992848872] [2019-12-27 23:18:03,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:18:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:18:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 23:18:03,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992848872] [2019-12-27 23:18:03,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791676859] [2019-12-27 23:18:03,337 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 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:03,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 23:18:03,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:18:03,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-27 23:18:03,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:18:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-27 23:18:03,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:18:03,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 20 [2019-12-27 23:18:03,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1196604218] [2019-12-27 23:18:03,432 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:18:03,433 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:18:03,435 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 38 transitions. [2019-12-27 23:18:03,435 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:18:03,436 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:18:03,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:18:03,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:18:03,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:18:03,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-12-27 23:18:03,436 INFO L87 Difference]: Start difference. First operand 148 states and 356 transitions. Second operand 15 states. [2019-12-27 23:18:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:18:03,994 INFO L93 Difference]: Finished difference Result 492 states and 1086 transitions. [2019-12-27 23:18:03,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-12-27 23:18:03,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:18:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:18:03,995 INFO L225 Difference]: With dead ends: 492 [2019-12-27 23:18:03,995 INFO L226 Difference]: Without dead ends: 490 [2019-12-27 23:18:03,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 23:18:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-12-27 23:18:04,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 147. [2019-12-27 23:18:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 23:18:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 352 transitions. [2019-12-27 23:18:04,004 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 352 transitions. Word has length 20 [2019-12-27 23:18:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:18:04,005 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 352 transitions. [2019-12-27 23:18:04,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:18:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 352 transitions. [2019-12-27 23:18:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:18:04,005 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:18:04,005 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:18:04,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:04,206 INFO L410 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:18:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:18:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2082763852, now seen corresponding path program 372 times [2019-12-27 23:18:04,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:18:04,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146852048] [2019-12-27 23:18:04,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:18:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:18:04,290 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 23:18:04,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146852048] [2019-12-27 23:18:04,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019831034] [2019-12-27 23:18:04,290 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:04,358 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 23:18:04,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 23:18:04,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:18:04,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:18:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-27 23:18:04,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:18:04,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 23:18:04,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [583693296] [2019-12-27 23:18:04,387 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:18:04,387 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:18:04,389 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 34 transitions. [2019-12-27 23:18:04,389 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:18:04,389 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 23:18:04,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 23:18:04,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:18:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 23:18:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 23:18:04,390 INFO L87 Difference]: Start difference. First operand 147 states and 352 transitions. Second operand 15 states. [2019-12-27 23:18:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:18:04,901 INFO L93 Difference]: Finished difference Result 503 states and 1109 transitions. [2019-12-27 23:18:04,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 23:18:04,902 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-12-27 23:18:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:18:04,903 INFO L225 Difference]: With dead ends: 503 [2019-12-27 23:18:04,903 INFO L226 Difference]: Without dead ends: 501 [2019-12-27 23:18:04,903 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=625, Invalid=1445, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 23:18:04,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2019-12-27 23:18:04,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 134. [2019-12-27 23:18:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 23:18:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 312 transitions. [2019-12-27 23:18:04,907 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 312 transitions. Word has length 20 [2019-12-27 23:18:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 23:18:04,908 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 312 transitions. [2019-12-27 23:18:04,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 23:18:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 312 transitions. [2019-12-27 23:18:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 23:18:04,908 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 23:18:04,908 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 23:18:05,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:05,109 INFO L410 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 23:18:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 23:18:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash 175804852, now seen corresponding path program 373 times [2019-12-27 23:18:05,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 23:18:05,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23926239] [2019-12-27 23:18:05,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 23:18:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:18:05,199 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 23:18:05,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23926239] [2019-12-27 23:18:05,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203830210] [2019-12-27 23:18:05,199 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 23:18:05,303 INFO L264 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-27 23:18:05,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 23:18:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-27 23:18:05,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 23:18:05,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 18 [2019-12-27 23:18:05,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [786808229] [2019-12-27 23:18:05,329 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 23:18:05,330 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 23:18:05,333 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 44 transitions. [2019-12-27 23:18:05,333 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 23:18:05,463 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 23:18:05,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 23:18:05,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 23:18:05,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 23:18:05,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-12-27 23:18:05,464 INFO L87 Difference]: Start difference. First operand 134 states and 312 transitions. Second operand 23 states. [2019-12-27 23:18:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 23:18:06,770 INFO L93 Difference]: Finished difference Result 570 states and 1255 transitions. [2019-12-27 23:18:06,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-12-27 23:18:06,770 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-12-27 23:18:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 23:18:06,771 INFO L225 Difference]: With dead ends: 570 [2019-12-27 23:18:06,771 INFO L226 Difference]: Without dead ends: 568 [2019-12-27 23:18:06,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=3806, Unknown=0, NotChecked=0, Total=5402 [2019-12-27 23:18:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. Received shutdown request... [2019-12-27 23:18:06,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 23:18:06,974 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 23:18:06,978 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 23:18:06,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 11:18:06 BasicIcfg [2019-12-27 23:18:06,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 23:18:06,980 INFO L168 Benchmark]: Toolchain (without parser) took 303472.46 ms. Allocated memory was 146.3 MB in the beginning and 233.3 MB in the end (delta: 87.0 MB). Free memory was 101.8 MB in the beginning and 94.7 MB in the end (delta: 7.1 MB). Peak memory consumption was 94.1 MB. Max. memory is 7.1 GB. [2019-12-27 23:18:06,980 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-27 23:18:06,981 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1048.90 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 101.4 MB in the beginning and 106.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 60.2 MB. Max. memory is 7.1 GB. [2019-12-27 23:18:06,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.48 ms. Allocated memory is still 203.4 MB. Free memory was 106.4 MB in the beginning and 104.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 23:18:06,981 INFO L168 Benchmark]: Boogie Preprocessor took 40.03 ms. Allocated memory is still 203.4 MB. Free memory was 104.4 MB in the beginning and 102.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 23:18:06,982 INFO L168 Benchmark]: RCFGBuilder took 537.65 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 102.4 MB in the beginning and 190.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2019-12-27 23:18:06,982 INFO L168 Benchmark]: TraceAbstraction took 301778.91 ms. Allocated memory was 234.9 MB in the beginning and 233.3 MB in the end (delta: -1.6 MB). Free memory was 190.4 MB in the beginning and 94.7 MB in the end (delta: 95.7 MB). Peak memory consumption was 94.1 MB. Max. memory is 7.1 GB. [2019-12-27 23:18:06,984 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 146.3 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1048.90 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 101.4 MB in the beginning and 106.4 MB in the end (delta: -5.0 MB). Peak memory consumption was 60.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 61.48 ms. Allocated memory is still 203.4 MB. Free memory was 106.4 MB in the beginning and 104.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.03 ms. Allocated memory is still 203.4 MB. Free memory was 104.4 MB in the beginning and 102.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 537.65 ms. Allocated memory was 203.4 MB in the beginning and 234.9 MB in the end (delta: 31.5 MB). Free memory was 102.4 MB in the beginning and 190.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 301778.91 ms. Allocated memory was 234.9 MB in the beginning and 233.3 MB in the end (delta: -1.6 MB). Free memory was 190.4 MB in the beginning and 94.7 MB in the end (delta: 95.7 MB). Peak memory consumption was 94.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 4.9s, 82 ProgramPointsBefore, 14 ProgramPointsAfterwards, 85 TransitionsBefore, 13 TransitionsAfterwards, 640 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 328 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 510 CheckedPairsTotal, 77 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 79 locations, 1 error locations. Result: TIMEOUT, OverallTime: 301.6s, OverallIterations: 375, TraceHistogramMax: 9, AutomataDifference: 141.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 5098 SDtfs, 44085 SDslu, 28759 SDs, 0 SdLazy, 29332 SolverSat, 31417 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18355 GetRequests, 5388 SyntacticMatches, 0 SemanticMatches, 12967 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104278 ImplicationChecksByTransitivity, 132.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=356, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 375 MinimizatonAttempts, 89174 StatesRemovedByMinimization, 373 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.0s SsaConstructionTime, 9.6s SatisfiabilityAnalysisTime, 41.4s InterpolantComputationTime, 13369 NumberOfCodeBlocks, 13038 NumberOfCodeBlocksAsserted, 1426 NumberOfCheckSat, 12621 ConstructedInterpolants, 0 QuantifiedInterpolants, 571301 SizeOfPredicates, 398 NumberOfNonLiveVariables, 51344 ConjunctsInSsa, 1889 ConjunctsInUnsatCore, 748 InterpolantComputations, 2 PerfectInterpolantSequences, 3220/16811 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