/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-SemanticLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/indexer.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 07:31:43,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 07:31:43,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 07:31:43,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 07:31:43,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 07:31:43,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 07:31:43,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 07:31:43,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 07:31:43,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 07:31:43,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 07:31:43,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 07:31:43,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 07:31:43,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 07:31:43,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 07:31:43,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 07:31:43,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 07:31:43,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 07:31:43,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 07:31:43,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 07:31:43,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 07:31:43,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 07:31:43,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 07:31:43,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 07:31:43,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 07:31:43,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 07:31:43,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 07:31:43,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 07:31:43,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 07:31:43,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 07:31:43,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 07:31:43,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 07:31:43,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 07:31:43,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 07:31:43,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 07:31:43,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 07:31:43,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 07:31:43,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 07:31:43,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 07:31:43,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 07:31:43,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 07:31:43,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 07:31:43,256 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-SemanticLbe-McrStrategy.epf [2020-04-18 07:31:43,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 07:31:43,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 07:31:43,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 07:31:43,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 07:31:43,288 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 07:31:43,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 07:31:43,289 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 07:31:43,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 07:31:43,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 07:31:43,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 07:31:43,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 07:31:43,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 07:31:43,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 07:31:43,290 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 07:31:43,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 07:31:43,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 07:31:43,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 07:31:43,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 07:31:43,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 07:31:43,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 07:31:43,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 07:31:43,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:31:43,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 07:31:43,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 07:31:43,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 07:31:43,292 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 07:31:43,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 07:31:43,293 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 07:31:43,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 07:31:43,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 07:31:43,560 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 07:31:43,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 07:31:43,584 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 07:31:43,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 07:31:43,586 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 07:31:43,587 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/indexer.i [2020-04-18 07:31:43,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3335e460/1c1bfdb01b5641cd9d0a27e6e27f01b5/FLAGc9c901b41 [2020-04-18 07:31:44,276 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 07:31:44,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/indexer.i [2020-04-18 07:31:44,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3335e460/1c1bfdb01b5641cd9d0a27e6e27f01b5/FLAGc9c901b41 [2020-04-18 07:31:44,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3335e460/1c1bfdb01b5641cd9d0a27e6e27f01b5 [2020-04-18 07:31:44,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 07:31:44,550 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 07:31:44,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:44,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 07:31:44,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 07:31:44,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8251712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44, skipping insertion in model container [2020-04-18 07:31:44,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 07:31:44,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 07:31:45,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:45,363 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 07:31:45,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:45,559 INFO L208 MainTranslator]: Completed translation [2020-04-18 07:31:45,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45 WrapperNode [2020-04-18 07:31:45,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:45,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:45,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 07:31:45,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 07:31:45,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:45,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 07:31:45,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 07:31:45,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 07:31:45,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 07:31:45,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 07:31:45,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (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 [2020-04-18 07:31:45,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 07:31:45,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 07:31:45,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-18 07:31:45,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread_routine [2020-04-18 07:31:45,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_routine [2020-04-18 07:31:45,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 07:31:45,750 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-04-18 07:31:45,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 07:31:45,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 07:31:45,752 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 07:31:46,222 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 07:31:46,222 INFO L295 CfgBuilder]: Removed 12 assume(true) statements. [2020-04-18 07:31:46,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:46 BoogieIcfgContainer [2020-04-18 07:31:46,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 07:31:46,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 07:31:46,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 07:31:46,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 07:31:46,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 07:31:44" (1/3) ... [2020-04-18 07:31:46,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72950281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:46, skipping insertion in model container [2020-04-18 07:31:46,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (2/3) ... [2020-04-18 07:31:46,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72950281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:46, skipping insertion in model container [2020-04-18 07:31:46,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:46" (3/3) ... [2020-04-18 07:31:46,236 INFO L109 eAbstractionObserver]: Analyzing ICFG indexer.i [2020-04-18 07:31:46,247 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 07:31:46,248 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 07:31:46,255 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 07:31:46,256 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 07:31:46,287 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,287 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,288 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,288 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,288 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,289 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,289 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,289 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,289 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,290 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,290 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,290 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,290 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,290 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,290 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,291 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,291 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,291 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,291 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,292 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,292 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,292 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,292 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,292 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,293 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,293 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,293 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,293 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,294 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,294 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,294 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,294 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,294 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,295 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,295 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,295 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,295 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,296 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,296 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,296 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,296 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,297 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,297 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,297 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,297 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,297 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,298 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,298 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,298 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,298 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,299 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,299 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,299 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,300 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,300 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,300 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,300 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,300 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,301 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,301 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,301 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,301 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,301 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,302 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,302 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,302 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,302 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,302 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,303 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,303 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,303 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,303 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,303 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,304 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,304 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,304 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,305 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,305 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,305 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,305 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,306 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,306 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,306 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,307 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,307 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,307 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,307 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,311 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~ret6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,312 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~w~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,312 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~new_val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,312 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~pre5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,312 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~h~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,313 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,313 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~h not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,313 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~ret_val~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,313 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,314 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,314 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,314 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~val not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,314 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#t~nondet2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,315 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,315 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~tab.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,315 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~m~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,315 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,316 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,316 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~h| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,316 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~tid~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,316 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,317 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_cas_#in~new_val| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,317 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_cas_~tab.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,317 WARN L315 ript$VariableManager]: TermVariabe thread_routineThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,317 WARN L315 ript$VariableManager]: TermVariabe |thread_routineThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:46,347 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 07:31:46,387 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 07:31:46,388 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 07:31:46,388 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 07:31:46,389 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 07:31:46,389 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 07:31:46,389 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 07:31:46,389 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 07:31:46,389 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 07:31:46,417 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 105 transitions, 218 flow [2020-04-18 07:31:46,419 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-04-18 07:31:46,472 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-04-18 07:31:46,472 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-04-18 07:31:46,479 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-04-18 07:31:46,483 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 94 places, 105 transitions, 218 flow [2020-04-18 07:31:46,513 INFO L129 PetriNetUnfolder]: 18/126 cut-off events. [2020-04-18 07:31:46,513 INFO L130 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2020-04-18 07:31:46,514 INFO L80 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 18/126 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 204 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2020-04-18 07:31:46,518 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2652 [2020-04-18 07:31:46,519 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-18 07:31:48,872 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-04-18 07:31:49,100 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2011 [2020-04-18 07:31:49,100 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2020-04-18 07:31:49,104 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 25 transitions, 58 flow [2020-04-18 07:31:49,115 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 73 states. [2020-04-18 07:31:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-04-18 07:31:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-18 07:31:49,127 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:49,128 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:49,129 INFO L427 AbstractCegarLoop]: === Iteration 1 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:31:49,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,135 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 1 times [2020-04-18 07:31:49,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:49,145 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [894604484] [2020-04-18 07:31:49,164 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,178 INFO L259 McrAutomatonBuilder]: Finished intersection with 8 states and 7 transitions. [2020-04-18 07:31:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2020-04-18 07:31:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-18 07:31:49,194 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash -734709978, now seen corresponding path program 2 times [2020-04-18 07:31:49,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:49,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302697604] [2020-04-18 07:31:49,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302697604] [2020-04-18 07:31:49,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:49,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:49,372 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:49,373 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,376 INFO L259 McrAutomatonBuilder]: Finished intersection with 8 states and 7 transitions. [2020-04-18 07:31:49,376 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:49,386 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 07:31:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 07:31:49,392 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-04-18 07:31:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,396 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2020-04-18 07:31:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-04-18 07:31:49,397 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:49,397 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [894604484] [2020-04-18 07:31:49,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:49,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 07:31:49,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [894604484] [2020-04-18 07:31:49,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 07:31:49,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:49,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 07:31:49,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 07:31:49,406 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-04-18 07:31:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,483 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2020-04-18 07:31:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 07:31:49,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-04-18 07:31:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:49,499 INFO L225 Difference]: With dead ends: 61 [2020-04-18 07:31:49,499 INFO L226 Difference]: Without dead ends: 53 [2020-04-18 07:31:49,500 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 07:31:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-04-18 07:31:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-04-18 07:31:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-18 07:31:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2020-04-18 07:31:49,544 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 7 [2020-04-18 07:31:49,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:49,545 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2020-04-18 07:31:49,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 07:31:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2020-04-18 07:31:49,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:49,546 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:49,546 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:49,546 INFO L427 AbstractCegarLoop]: === Iteration 2 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:31:49,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,547 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 1 times [2020-04-18 07:31:49,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:49,547 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [424501353] [2020-04-18 07:31:49,548 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,548 INFO L259 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-04-18 07:31:49,549 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-04-18 07:31:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:49,549 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:49,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,550 INFO L82 PathProgramCache]: Analyzing trace with hash 654852975, now seen corresponding path program 2 times [2020-04-18 07:31:49,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:49,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592438755] [2020-04-18 07:31:49,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592438755] [2020-04-18 07:31:49,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563435005] [2020-04-18 07:31:49,646 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:49,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 07:31:49,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:49,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 07:31:49,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:49,842 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:31:49,843 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:31:49,850 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:31:49,851 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:31:49,851 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-04-18 07:31:49,901 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:31:49,902 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2020-04-18 07:31:49,903 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:31:49,920 INFO L619 ElimStorePlain]: treesize reduction 16, result has 52.9 percent of original size [2020-04-18 07:31:49,921 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-18 07:31:49,921 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2020-04-18 07:31:49,960 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-04-18 07:31:49,961 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:31:49,972 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:31:49,973 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:31:49,973 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2020-04-18 07:31:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:49,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:49,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3] total 9 [2020-04-18 07:31:49,987 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:49,988 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,991 INFO L259 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-04-18 07:31:49,991 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,067 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:31:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-04-18 07:31:50,069 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 10 states. [2020-04-18 07:31:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,102 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2020-04-18 07:31:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2020-04-18 07:31:50,103 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:50,103 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [424501353] [2020-04-18 07:31:50,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:50,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:31:50,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [424501353] [2020-04-18 07:31:50,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 07:31:50,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:50,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:31:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:50,105 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 10 states. [2020-04-18 07:31:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,438 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2020-04-18 07:31:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-18 07:31:50,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2020-04-18 07:31:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:50,441 INFO L225 Difference]: With dead ends: 65 [2020-04-18 07:31:50,441 INFO L226 Difference]: Without dead ends: 65 [2020-04-18 07:31:50,442 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-18 07:31:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 52. [2020-04-18 07:31:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-18 07:31:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2020-04-18 07:31:50,450 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 8 [2020-04-18 07:31:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:50,451 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2020-04-18 07:31:50,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 07:31:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2020-04-18 07:31:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:50,452 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:50,452 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:50,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:50,658 INFO L427 AbstractCegarLoop]: === Iteration 3 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:31:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash -472215434, now seen corresponding path program 1 times [2020-04-18 07:31:50,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:50,659 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1929937961] [2020-04-18 07:31:50,659 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,660 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-04-18 07:31:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 07:31:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:50,661 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash -471337034, now seen corresponding path program 2 times [2020-04-18 07:31:50,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915382609] [2020-04-18 07:31:50,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:50,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915382609] [2020-04-18 07:31:50,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282021664] [2020-04-18 07:31:50,759 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 [2020-04-18 07:31:50,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:50,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:50,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-18 07:31:50,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:50,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:50,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-04-18 07:31:50,834 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,835 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,837 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 17 transitions. [2020-04-18 07:31:50,837 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,874 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:50,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:50,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:50,874 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 6 states. [2020-04-18 07:31:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,886 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2020-04-18 07:31:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-04-18 07:31:50,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:50,887 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1929937961] [2020-04-18 07:31:50,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:50,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:50,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1929937961] [2020-04-18 07:31:50,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 07:31:50,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:50,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:50,889 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 6 states. [2020-04-18 07:31:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,911 INFO L93 Difference]: Finished difference Result 53 states and 107 transitions. [2020-04-18 07:31:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 07:31:50,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-04-18 07:31:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:50,914 INFO L225 Difference]: With dead ends: 53 [2020-04-18 07:31:50,914 INFO L226 Difference]: Without dead ends: 53 [2020-04-18 07:31:50,915 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-04-18 07:31:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-04-18 07:31:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-18 07:31:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2020-04-18 07:31:50,922 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 11 [2020-04-18 07:31:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:50,922 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2020-04-18 07:31:50,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 07:31:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2020-04-18 07:31:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:31:50,923 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:50,923 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:51,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:51,128 INFO L427 AbstractCegarLoop]: === Iteration 4 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:31:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1112297535, now seen corresponding path program 3 times [2020-04-18 07:31:51,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:51,130 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1639879842] [2020-04-18 07:31:51,130 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,131 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:31:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 07:31:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:31:51,132 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1113175935, now seen corresponding path program 4 times [2020-04-18 07:31:51,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:51,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961553895] [2020-04-18 07:31:51,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:51,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961553895] [2020-04-18 07:31:51,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110616142] [2020-04-18 07:31:51,204 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 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 [2020-04-18 07:31:51,271 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:51,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:51,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-18 07:31:51,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:51,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:51,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-18 07:31:51,287 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,292 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,296 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 18 transitions. [2020-04-18 07:31:51,297 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,324 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:31:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:51,325 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 7 states. [2020-04-18 07:31:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,343 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2020-04-18 07:31:51,343 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-04-18 07:31:51,343 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:51,344 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1639879842] [2020-04-18 07:31:51,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:51,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:51,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1639879842] [2020-04-18 07:31:51,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 07:31:51,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:31:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:51,346 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand 7 states. [2020-04-18 07:31:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,369 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2020-04-18 07:31:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-18 07:31:51,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-04-18 07:31:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:51,372 INFO L225 Difference]: With dead ends: 54 [2020-04-18 07:31:51,372 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 07:31:51,373 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 07:31:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-04-18 07:31:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-18 07:31:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2020-04-18 07:31:51,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 12 [2020-04-18 07:31:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:51,379 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2020-04-18 07:31:51,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 07:31:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2020-04-18 07:31:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:31:51,380 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:51,380 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:51,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:51,581 INFO L427 AbstractCegarLoop]: === Iteration 5 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:31:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1307407978, now seen corresponding path program 5 times [2020-04-18 07:31:51,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:51,583 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2043379547] [2020-04-18 07:31:51,583 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,584 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:31:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-04-18 07:31:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:31:51,586 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:51,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1306529578, now seen corresponding path program 6 times [2020-04-18 07:31:51,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:51,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475849832] [2020-04-18 07:31:51,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:51,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475849832] [2020-04-18 07:31:51,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834816610] [2020-04-18 07:31:51,664 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 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 [2020-04-18 07:31:51,728 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:31:51,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:51,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 07:31:51,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:51,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:51,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-18 07:31:51,744 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,746 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,749 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 19 transitions. [2020-04-18 07:31:51,749 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,780 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 07:31:51,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:51,781 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 8 states. [2020-04-18 07:31:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,808 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-04-18 07:31:51,808 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-04-18 07:31:51,808 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:51,809 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2043379547] [2020-04-18 07:31:51,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:51,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:31:51,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2043379547] [2020-04-18 07:31:51,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 07:31:51,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:51,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 07:31:51,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:51,811 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand 8 states. [2020-04-18 07:31:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,839 INFO L93 Difference]: Finished difference Result 55 states and 109 transitions. [2020-04-18 07:31:51,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 07:31:51,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-04-18 07:31:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:51,841 INFO L225 Difference]: With dead ends: 55 [2020-04-18 07:31:51,841 INFO L226 Difference]: Without dead ends: 55 [2020-04-18 07:31:51,842 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-18 07:31:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-04-18 07:31:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 07:31:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2020-04-18 07:31:51,847 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 13 [2020-04-18 07:31:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:51,848 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2020-04-18 07:31:51,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 07:31:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2020-04-18 07:31:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:31:51,849 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:51,849 INFO L425 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:52,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,054 INFO L427 AbstractCegarLoop]: === Iteration 6 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:31:52,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,055 INFO L82 PathProgramCache]: Analyzing trace with hash 991132447, now seen corresponding path program 7 times [2020-04-18 07:31:52,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:52,056 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1994995070] [2020-04-18 07:31:52,057 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,058 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 07:31:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 07:31:52,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:31:52,059 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,059 INFO L82 PathProgramCache]: Analyzing trace with hash 992010847, now seen corresponding path program 8 times [2020-04-18 07:31:52,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:52,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608950302] [2020-04-18 07:31:52,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:52,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608950302] [2020-04-18 07:31:52,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523633086] [2020-04-18 07:31:52,169 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 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 [2020-04-18 07:31:52,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:52,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:52,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:31:52,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:52,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:52,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-18 07:31:52,249 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:52,252 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,255 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 20 transitions. [2020-04-18 07:31:52,255 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:52,288 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:31:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 07:31:52,289 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 9 states. [2020-04-18 07:31:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,318 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-04-18 07:31:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-04-18 07:31:52,318 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:52,318 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1994995070] [2020-04-18 07:31:52,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:52,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:31:52,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1994995070] [2020-04-18 07:31:52,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 07:31:52,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:52,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:31:52,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 07:31:52,320 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand 9 states. [2020-04-18 07:31:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,344 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2020-04-18 07:31:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 07:31:52,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-04-18 07:31:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:52,345 INFO L225 Difference]: With dead ends: 56 [2020-04-18 07:31:52,346 INFO L226 Difference]: Without dead ends: 56 [2020-04-18 07:31:52,346 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 07:31:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-04-18 07:31:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-04-18 07:31:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-18 07:31:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 110 transitions. [2020-04-18 07:31:52,351 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 110 transitions. Word has length 14 [2020-04-18 07:31:52,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:52,352 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 110 transitions. [2020-04-18 07:31:52,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 07:31:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 110 transitions. [2020-04-18 07:31:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:31:52,353 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:52,353 INFO L425 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:52,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,557 INFO L427 AbstractCegarLoop]: === Iteration 7 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:31:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,558 INFO L82 PathProgramCache]: Analyzing trace with hash -768558410, now seen corresponding path program 9 times [2020-04-18 07:31:52,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:52,558 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1562314584] [2020-04-18 07:31:52,559 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,560 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 23 transitions. [2020-04-18 07:31:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-04-18 07:31:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:31:52,561 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,562 INFO L82 PathProgramCache]: Analyzing trace with hash -767680010, now seen corresponding path program 10 times [2020-04-18 07:31:52,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:52,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069045553] [2020-04-18 07:31:52,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:52,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069045553] [2020-04-18 07:31:52,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186386126] [2020-04-18 07:31:52,657 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 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 [2020-04-18 07:31:52,749 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:52,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:52,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:52,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:52,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:52,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-18 07:31:52,768 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:52,773 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,777 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 21 transitions. [2020-04-18 07:31:52,777 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:52,814 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:31:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-04-18 07:31:52,815 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 10 states. [2020-04-18 07:31:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,859 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-04-18 07:31:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-04-18 07:31:52,860 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:52,860 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1562314584] [2020-04-18 07:31:52,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:52,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 07:31:52,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1562314584] [2020-04-18 07:31:52,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 07:31:52,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:52,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:31:52,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-04-18 07:31:52,864 INFO L87 Difference]: Start difference. First operand 56 states and 110 transitions. Second operand 10 states. [2020-04-18 07:31:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,901 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2020-04-18 07:31:52,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 07:31:52,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-04-18 07:31:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:52,902 INFO L225 Difference]: With dead ends: 57 [2020-04-18 07:31:52,902 INFO L226 Difference]: Without dead ends: 57 [2020-04-18 07:31:52,902 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-04-18 07:31:52,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-04-18 07:31:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-04-18 07:31:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-18 07:31:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 111 transitions. [2020-04-18 07:31:52,914 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 111 transitions. Word has length 15 [2020-04-18 07:31:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:52,917 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 111 transitions. [2020-04-18 07:31:52,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 07:31:52,918 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 111 transitions. [2020-04-18 07:31:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:31:52,919 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:52,919 INFO L425 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:53,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,123 INFO L427 AbstractCegarLoop]: === Iteration 8 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:31:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,123 INFO L82 PathProgramCache]: Analyzing trace with hash 515599871, now seen corresponding path program 11 times [2020-04-18 07:31:53,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:53,124 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1043664070] [2020-04-18 07:31:53,124 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,125 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-04-18 07:31:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-04-18 07:31:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:31:53,126 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash 516478271, now seen corresponding path program 12 times [2020-04-18 07:31:53,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345656765] [2020-04-18 07:31:53,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:53,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345656765] [2020-04-18 07:31:53,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237993836] [2020-04-18 07:31:53,207 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 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 [2020-04-18 07:31:53,268 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:31:53,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:53,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,288 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:31:53,289 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 139 [2020-04-18 07:31:53,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,318 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:31:53,418 INFO L619 ElimStorePlain]: treesize reduction 319, result has 7.0 percent of original size [2020-04-18 07:31:53,419 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:31:53,420 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:31:53,450 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:31:53,451 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:31:53,459 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:31:53,460 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:31:53,460 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:31:53,491 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:31:53,498 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:31:53,508 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:31:53,509 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:31:53,509 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:31:53,577 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:31:53,578 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:31:53,584 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:31:53,584 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:31:53,585 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:31:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-04-18 07:31:53,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:53,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2020-04-18 07:31:53,606 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,608 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,611 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 22 transitions. [2020-04-18 07:31:53,611 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,792 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:53,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:53,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:31:53,792 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 16 states. [2020-04-18 07:31:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:54,037 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-04-18 07:31:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-04-18 07:31:54,038 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:54,039 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1043664070] [2020-04-18 07:31:54,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:54,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:31:54,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1043664070] [2020-04-18 07:31:54,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 07:31:54,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:54,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:31:54,041 INFO L87 Difference]: Start difference. First operand 57 states and 111 transitions. Second operand 16 states. [2020-04-18 07:31:58,252 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 07:32:02,358 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 07:32:05,157 WARN L192 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 07:32:08,607 WARN L192 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 07:32:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:16,443 INFO L93 Difference]: Finished difference Result 114 states and 224 transitions. [2020-04-18 07:32:16,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 07:32:16,444 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-04-18 07:32:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:16,445 INFO L225 Difference]: With dead ends: 114 [2020-04-18 07:32:16,445 INFO L226 Difference]: Without dead ends: 114 [2020-04-18 07:32:16,446 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=437, Invalid=823, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:32:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-18 07:32:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 58. [2020-04-18 07:32:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-18 07:32:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 112 transitions. [2020-04-18 07:32:16,451 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 112 transitions. Word has length 16 [2020-04-18 07:32:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:16,452 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 112 transitions. [2020-04-18 07:32:16,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 07:32:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 112 transitions. [2020-04-18 07:32:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 07:32:16,453 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:16,453 INFO L425 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:16,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:16,657 INFO L427 AbstractCegarLoop]: === Iteration 9 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:32:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:16,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1669800918, now seen corresponding path program 13 times [2020-04-18 07:32:16,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:16,658 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [366077489] [2020-04-18 07:32:16,659 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:16,659 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 25 transitions. [2020-04-18 07:32:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 07:32:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 07:32:16,660 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1670679318, now seen corresponding path program 14 times [2020-04-18 07:32:16,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:16,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430011946] [2020-04-18 07:32:16,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:16,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430011946] [2020-04-18 07:32:16,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497025149] [2020-04-18 07:32:16,786 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 [2020-04-18 07:32:16,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:16,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:16,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:16,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:16,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:16,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-18 07:32:16,871 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:16,873 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:16,880 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 23 transitions. [2020-04-18 07:32:16,880 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:16,939 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:32:16,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:32:16,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:32:16,940 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 12 states. [2020-04-18 07:32:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:17,007 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-04-18 07:32:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-04-18 07:32:17,008 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:17,008 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [366077489] [2020-04-18 07:32:17,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:17,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-04-18 07:32:17,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [366077489] [2020-04-18 07:32:17,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:32:17,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:17,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:32:17,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:32:17,010 INFO L87 Difference]: Start difference. First operand 58 states and 112 transitions. Second operand 12 states. [2020-04-18 07:32:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:17,035 INFO L93 Difference]: Finished difference Result 59 states and 113 transitions. [2020-04-18 07:32:17,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 07:32:17,038 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-04-18 07:32:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:17,039 INFO L225 Difference]: With dead ends: 59 [2020-04-18 07:32:17,039 INFO L226 Difference]: Without dead ends: 59 [2020-04-18 07:32:17,040 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:32:17,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-04-18 07:32:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-04-18 07:32:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-18 07:32:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 113 transitions. [2020-04-18 07:32:17,043 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 113 transitions. Word has length 17 [2020-04-18 07:32:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:17,044 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 113 transitions. [2020-04-18 07:32:17,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:32:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 113 transitions. [2020-04-18 07:32:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:32:17,044 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:17,044 INFO L425 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:17,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:17,252 INFO L427 AbstractCegarLoop]: === Iteration 10 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:32:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:17,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1204672289, now seen corresponding path program 15 times [2020-04-18 07:32:17,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:17,252 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [170850899] [2020-04-18 07:32:17,253 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:17,253 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-04-18 07:32:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-04-18 07:32:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:32:17,254 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:17,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1203793889, now seen corresponding path program 16 times [2020-04-18 07:32:17,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:17,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617144380] [2020-04-18 07:32:17,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:17,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617144380] [2020-04-18 07:32:17,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171363064] [2020-04-18 07:32:17,384 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 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 [2020-04-18 07:32:17,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:17,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:17,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:32:17,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:17,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:17,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-18 07:32:17,457 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:17,459 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:17,463 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 24 transitions. [2020-04-18 07:32:17,463 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:17,546 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:32:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:17,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:17,547 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 13 states. [2020-04-18 07:32:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:17,622 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-04-18 07:32:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-04-18 07:32:17,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:17,623 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [170850899] [2020-04-18 07:32:17,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:17,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-04-18 07:32:17,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [170850899] [2020-04-18 07:32:17,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 07:32:17,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:17,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:17,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:17,625 INFO L87 Difference]: Start difference. First operand 59 states and 113 transitions. Second operand 13 states. [2020-04-18 07:32:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:17,653 INFO L93 Difference]: Finished difference Result 60 states and 114 transitions. [2020-04-18 07:32:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-18 07:32:17,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2020-04-18 07:32:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:17,655 INFO L225 Difference]: With dead ends: 60 [2020-04-18 07:32:17,655 INFO L226 Difference]: Without dead ends: 60 [2020-04-18 07:32:17,655 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:17,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-18 07:32:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-04-18 07:32:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-18 07:32:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 114 transitions. [2020-04-18 07:32:17,660 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 114 transitions. Word has length 18 [2020-04-18 07:32:17,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:17,660 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 114 transitions. [2020-04-18 07:32:17,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 07:32:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 114 transitions. [2020-04-18 07:32:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 07:32:17,661 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:17,661 INFO L425 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:17,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:17,870 INFO L427 AbstractCegarLoop]: === Iteration 11 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:32:17,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:17,870 INFO L82 PathProgramCache]: Analyzing trace with hash -119028490, now seen corresponding path program 17 times [2020-04-18 07:32:17,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:17,871 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [749127794] [2020-04-18 07:32:17,872 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:17,873 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 27 transitions. [2020-04-18 07:32:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-04-18 07:32:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 07:32:17,874 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:17,874 INFO L82 PathProgramCache]: Analyzing trace with hash -118150090, now seen corresponding path program 18 times [2020-04-18 07:32:17,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:17,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836877893] [2020-04-18 07:32:17,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:17,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836877893] [2020-04-18 07:32:17,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418787233] [2020-04-18 07:32:17,998 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 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 [2020-04-18 07:32:18,063 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:32:18,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:18,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:32:18,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:18,094 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:32:18,095 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 88 [2020-04-18 07:32:18,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,098 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,098 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,099 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:32:18,154 INFO L619 ElimStorePlain]: treesize reduction 88, result has 21.4 percent of original size [2020-04-18 07:32:18,155 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:32:18,156 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:32:18,183 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:32:18,183 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:32:18,190 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:32:18,190 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:32:18,191 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:32:18,219 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:32:18,219 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:32:18,227 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:32:18,228 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:32:18,228 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:32:18,312 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:32:18,313 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:32:18,318 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:32:18,319 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:32:18,319 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:32:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-04-18 07:32:18,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:18,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 18 [2020-04-18 07:32:18,344 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:18,347 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:18,350 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 25 transitions. [2020-04-18 07:32:18,351 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:18,567 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:32:18,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:32:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:32:18,568 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 19 states. [2020-04-18 07:32:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:18,920 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-04-18 07:32:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-04-18 07:32:18,921 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:18,921 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [749127794] [2020-04-18 07:32:18,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:18,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:32:18,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [749127794] [2020-04-18 07:32:18,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 07:32:18,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:18,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:32:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:32:18,923 INFO L87 Difference]: Start difference. First operand 60 states and 114 transitions. Second operand 19 states. [2020-04-18 07:32:23,079 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 07:32:27,154 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 07:32:31,192 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 07:32:35,488 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 07:32:43,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:43,925 INFO L93 Difference]: Finished difference Result 117 states and 227 transitions. [2020-04-18 07:32:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 07:32:43,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-04-18 07:32:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:43,926 INFO L225 Difference]: With dead ends: 117 [2020-04-18 07:32:43,926 INFO L226 Difference]: Without dead ends: 117 [2020-04-18 07:32:43,927 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=611, Invalid=1111, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:32:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-18 07:32:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 61. [2020-04-18 07:32:43,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-18 07:32:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 115 transitions. [2020-04-18 07:32:43,934 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 115 transitions. Word has length 19 [2020-04-18 07:32:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:43,934 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 115 transitions. [2020-04-18 07:32:43,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 07:32:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 07:32:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-18 07:32:43,935 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:43,935 INFO L425 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:44,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:44,139 INFO L427 AbstractCegarLoop]: === Iteration 12 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:32:44,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:44,140 INFO L82 PathProgramCache]: Analyzing trace with hash -823809089, now seen corresponding path program 19 times [2020-04-18 07:32:44,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:44,140 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [678938518] [2020-04-18 07:32:44,141 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:44,142 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-04-18 07:32:44,142 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 07:32:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-18 07:32:44,143 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash -822930689, now seen corresponding path program 20 times [2020-04-18 07:32:44,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:44,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518956088] [2020-04-18 07:32:44,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:44,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518956088] [2020-04-18 07:32:44,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621698152] [2020-04-18 07:32:44,278 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:44,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:44,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:44,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 07:32:44,342 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:44,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:44,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-18 07:32:44,360 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:44,362 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:44,366 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 26 transitions. [2020-04-18 07:32:44,366 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:44,462 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:32:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:44,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:44,462 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 15 states. [2020-04-18 07:32:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:44,564 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-04-18 07:32:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-04-18 07:32:44,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:44,565 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [678938518] [2020-04-18 07:32:44,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:44,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-04-18 07:32:44,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [678938518] [2020-04-18 07:32:44,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 07:32:44,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:44,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:44,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:44,567 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 15 states. [2020-04-18 07:32:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:44,599 INFO L93 Difference]: Finished difference Result 62 states and 116 transitions. [2020-04-18 07:32:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-18 07:32:44,600 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-04-18 07:32:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:44,601 INFO L225 Difference]: With dead ends: 62 [2020-04-18 07:32:44,601 INFO L226 Difference]: Without dead ends: 62 [2020-04-18 07:32:44,601 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-18 07:32:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-04-18 07:32:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-18 07:32:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 116 transitions. [2020-04-18 07:32:44,604 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 116 transitions. Word has length 20 [2020-04-18 07:32:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:44,605 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 116 transitions. [2020-04-18 07:32:44,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 07:32:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 116 transitions. [2020-04-18 07:32:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 07:32:44,605 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:44,606 INFO L425 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:44,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:44,809 INFO L427 AbstractCegarLoop]: === Iteration 13 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:32:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:44,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1197171178, now seen corresponding path program 21 times [2020-04-18 07:32:44,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:44,810 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [940887725] [2020-04-18 07:32:44,811 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:44,812 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 29 transitions. [2020-04-18 07:32:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-04-18 07:32:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 07:32:44,813 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1196292778, now seen corresponding path program 22 times [2020-04-18 07:32:44,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:44,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551200403] [2020-04-18 07:32:44,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:44,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551200403] [2020-04-18 07:32:44,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564666052] [2020-04-18 07:32:44,929 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:44,984 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:44,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:44,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 07:32:44,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:45,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:45,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-18 07:32:45,017 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:45,020 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:45,024 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 27 transitions. [2020-04-18 07:32:45,025 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:45,124 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:32:45,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:45,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:32:45,125 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 16 states. [2020-04-18 07:32:45,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:45,236 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-04-18 07:32:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-04-18 07:32:45,236 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:45,237 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [940887725] [2020-04-18 07:32:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:45,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-04-18 07:32:45,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [940887725] [2020-04-18 07:32:45,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 07:32:45,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:45,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:45,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:32:45,239 INFO L87 Difference]: Start difference. First operand 62 states and 116 transitions. Second operand 16 states. [2020-04-18 07:32:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:45,271 INFO L93 Difference]: Finished difference Result 63 states and 117 transitions. [2020-04-18 07:32:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 07:32:45,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2020-04-18 07:32:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:45,272 INFO L225 Difference]: With dead ends: 63 [2020-04-18 07:32:45,273 INFO L226 Difference]: Without dead ends: 63 [2020-04-18 07:32:45,273 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:32:45,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-18 07:32:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-04-18 07:32:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-18 07:32:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 117 transitions. [2020-04-18 07:32:45,277 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 117 transitions. Word has length 21 [2020-04-18 07:32:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:45,278 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 117 transitions. [2020-04-18 07:32:45,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 07:32:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 117 transitions. [2020-04-18 07:32:45,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 07:32:45,278 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:45,279 INFO L425 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:45,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:45,488 INFO L427 AbstractCegarLoop]: === Iteration 14 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:32:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:45,488 INFO L82 PathProgramCache]: Analyzing trace with hash 113505951, now seen corresponding path program 23 times [2020-04-18 07:32:45,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:45,489 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1371813355] [2020-04-18 07:32:45,490 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:45,491 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-04-18 07:32:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-04-18 07:32:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 07:32:45,492 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:45,492 INFO L82 PathProgramCache]: Analyzing trace with hash 114384351, now seen corresponding path program 24 times [2020-04-18 07:32:45,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:45,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037365501] [2020-04-18 07:32:45,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:32:45,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037365501] [2020-04-18 07:32:45,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619025073] [2020-04-18 07:32:45,686 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 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 [2020-04-18 07:32:45,799 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:32:45,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:45,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:32:45,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:45,829 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:32:45,830 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 198 [2020-04-18 07:32:45,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:45,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:45,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:45,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:45,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:45,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:45,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:45,838 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:32:45,929 INFO L619 ElimStorePlain]: treesize reduction 327, result has 6.8 percent of original size [2020-04-18 07:32:45,930 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:32:45,931 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:32:45,983 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:32:45,984 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:32:45,995 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:32:45,996 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:32:45,996 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:32:46,040 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:32:46,041 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:32:46,054 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:32:46,055 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:32:46,056 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:32:46,149 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:32:46,150 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:32:46,160 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:32:46,161 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:32:46,161 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:32:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-04-18 07:32:46,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:46,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 21 [2020-04-18 07:32:46,199 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:46,204 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:46,211 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 28 transitions. [2020-04-18 07:32:46,211 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:46,529 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:32:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 07:32:46,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:32:46,530 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 22 states. [2020-04-18 07:32:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:47,030 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-04-18 07:32:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-04-18 07:32:47,030 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:47,031 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1371813355] [2020-04-18 07:32:47,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:47,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:32:47,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1371813355] [2020-04-18 07:32:47,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 07:32:47,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:47,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 07:32:47,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:32:47,032 INFO L87 Difference]: Start difference. First operand 63 states and 117 transitions. Second operand 22 states. [2020-04-18 07:32:51,233 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 07:32:55,316 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 07:32:59,361 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 07:33:03,897 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 07:33:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:13,950 INFO L93 Difference]: Finished difference Result 115 states and 223 transitions. [2020-04-18 07:33:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-18 07:33:13,950 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2020-04-18 07:33:13,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:13,952 INFO L225 Difference]: With dead ends: 115 [2020-04-18 07:33:13,952 INFO L226 Difference]: Without dead ends: 115 [2020-04-18 07:33:13,953 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=848, Invalid=1504, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 07:33:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-18 07:33:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 64. [2020-04-18 07:33:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-18 07:33:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 118 transitions. [2020-04-18 07:33:13,957 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 118 transitions. Word has length 22 [2020-04-18 07:33:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:13,957 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 118 transitions. [2020-04-18 07:33:13,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 07:33:13,957 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 118 transitions. [2020-04-18 07:33:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-18 07:33:13,957 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:13,958 INFO L425 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:14,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:14,164 INFO L427 AbstractCegarLoop]: === Iteration 15 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:33:14,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:14,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2089791286, now seen corresponding path program 25 times [2020-04-18 07:33:14,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:14,165 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2060399981] [2020-04-18 07:33:14,165 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:14,166 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 31 transitions. [2020-04-18 07:33:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-04-18 07:33:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-18 07:33:14,167 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:14,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:14,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2090669686, now seen corresponding path program 26 times [2020-04-18 07:33:14,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:14,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775285040] [2020-04-18 07:33:14,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:14,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775285040] [2020-04-18 07:33:14,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856158987] [2020-04-18 07:33:14,352 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 [2020-04-18 07:33:14,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:14,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:14,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 07:33:14,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:14,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:14,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-18 07:33:14,426 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:14,432 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:14,439 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 29 transitions. [2020-04-18 07:33:14,439 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:14,620 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:33:14,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:33:14,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 07:33:14,621 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 18 states. [2020-04-18 07:33:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:14,792 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-04-18 07:33:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-04-18 07:33:14,792 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:14,793 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2060399981] [2020-04-18 07:33:14,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:14,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-04-18 07:33:14,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2060399981] [2020-04-18 07:33:14,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 07:33:14,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:14,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:33:14,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 07:33:14,795 INFO L87 Difference]: Start difference. First operand 64 states and 118 transitions. Second operand 18 states. [2020-04-18 07:33:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:14,830 INFO L93 Difference]: Finished difference Result 65 states and 119 transitions. [2020-04-18 07:33:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:33:14,830 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 23 [2020-04-18 07:33:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:14,831 INFO L225 Difference]: With dead ends: 65 [2020-04-18 07:33:14,831 INFO L226 Difference]: Without dead ends: 65 [2020-04-18 07:33:14,832 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 07:33:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-18 07:33:14,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-04-18 07:33:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-18 07:33:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 119 transitions. [2020-04-18 07:33:14,839 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 119 transitions. Word has length 23 [2020-04-18 07:33:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:14,840 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 119 transitions. [2020-04-18 07:33:14,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 07:33:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 119 transitions. [2020-04-18 07:33:14,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-18 07:33:14,841 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:14,841 INFO L425 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:15,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:15,051 INFO L427 AbstractCegarLoop]: === Iteration 16 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:33:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1069872769, now seen corresponding path program 27 times [2020-04-18 07:33:15,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:15,052 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1056913896] [2020-04-18 07:33:15,053 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:15,053 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-04-18 07:33:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-04-18 07:33:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-18 07:33:15,054 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:15,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:15,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1068994369, now seen corresponding path program 28 times [2020-04-18 07:33:15,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:15,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221297285] [2020-04-18 07:33:15,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:15,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221297285] [2020-04-18 07:33:15,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346663212] [2020-04-18 07:33:15,224 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:15,294 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:15,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:15,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-18 07:33:15,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:15,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:15,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-18 07:33:15,307 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:15,310 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:15,315 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 30 transitions. [2020-04-18 07:33:15,315 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:15,472 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:33:15,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:33:15,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:33:15,472 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 19 states. [2020-04-18 07:33:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:15,650 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-04-18 07:33:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-04-18 07:33:15,651 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:15,651 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1056913896] [2020-04-18 07:33:15,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:15,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-04-18 07:33:15,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1056913896] [2020-04-18 07:33:15,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 07:33:15,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:15,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:33:15,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:33:15,653 INFO L87 Difference]: Start difference. First operand 65 states and 119 transitions. Second operand 19 states. [2020-04-18 07:33:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:15,703 INFO L93 Difference]: Finished difference Result 66 states and 120 transitions. [2020-04-18 07:33:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-18 07:33:15,708 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 24 [2020-04-18 07:33:15,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:15,709 INFO L225 Difference]: With dead ends: 66 [2020-04-18 07:33:15,709 INFO L226 Difference]: Without dead ends: 66 [2020-04-18 07:33:15,710 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:33:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-18 07:33:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-04-18 07:33:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 07:33:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 120 transitions. [2020-04-18 07:33:15,712 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 120 transitions. Word has length 24 [2020-04-18 07:33:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:15,713 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 120 transitions. [2020-04-18 07:33:15,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 07:33:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 120 transitions. [2020-04-18 07:33:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 07:33:15,714 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:15,714 INFO L425 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:15,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:15,915 INFO L427 AbstractCegarLoop]: === Iteration 17 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:33:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:15,915 INFO L82 PathProgramCache]: Analyzing trace with hash -235210666, now seen corresponding path program 29 times [2020-04-18 07:33:15,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:15,916 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [243946063] [2020-04-18 07:33:15,917 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:15,918 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 33 transitions. [2020-04-18 07:33:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-04-18 07:33:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 07:33:15,919 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash -234332266, now seen corresponding path program 30 times [2020-04-18 07:33:15,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:15,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348826630] [2020-04-18 07:33:15,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:16,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348826630] [2020-04-18 07:33:16,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509179044] [2020-04-18 07:33:16,143 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 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 [2020-04-18 07:33:16,199 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:16,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:16,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:33:16,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:16,217 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:33:16,217 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 75 [2020-04-18 07:33:16,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:16,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:16,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:16,220 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-04-18 07:33:16,274 INFO L619 ElimStorePlain]: treesize reduction 97, result has 19.8 percent of original size [2020-04-18 07:33:16,275 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:33:16,275 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:33:16,317 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:33:16,317 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:33:16,324 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:33:16,324 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:33:16,324 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:33:16,359 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:33:16,359 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:33:16,370 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:33:16,371 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:33:16,371 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:33:16,450 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:33:16,451 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:33:16,456 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:33:16,456 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:33:16,457 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:33:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-04-18 07:33:16,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:16,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 24 [2020-04-18 07:33:16,481 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:16,484 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:16,491 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 31 transitions. [2020-04-18 07:33:16,491 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:16,785 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:33:16,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 07:33:16,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:33:16,786 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 25 states. [2020-04-18 07:33:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:17,463 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-04-18 07:33:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-04-18 07:33:17,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:17,464 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [243946063] [2020-04-18 07:33:17,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:17,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:33:17,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [243946063] [2020-04-18 07:33:17,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 07:33:17,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:17,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 07:33:17,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1179, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:33:17,466 INFO L87 Difference]: Start difference. First operand 66 states and 120 transitions. Second operand 25 states. [2020-04-18 07:33:21,692 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 07:33:25,778 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 07:33:28,678 WARN L192 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 07:33:30,672 WARN L192 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 07:33:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:39,402 INFO L93 Difference]: Finished difference Result 113 states and 214 transitions. [2020-04-18 07:33:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 07:33:39,402 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2020-04-18 07:33:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:39,403 INFO L225 Difference]: With dead ends: 113 [2020-04-18 07:33:39,403 INFO L226 Difference]: Without dead ends: 113 [2020-04-18 07:33:39,404 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1039, Invalid=1822, Unknown=1, NotChecked=0, Total=2862 [2020-04-18 07:33:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-18 07:33:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 67. [2020-04-18 07:33:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-18 07:33:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 121 transitions. [2020-04-18 07:33:39,407 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 121 transitions. Word has length 25 [2020-04-18 07:33:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:39,408 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 121 transitions. [2020-04-18 07:33:39,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 07:33:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 121 transitions. [2020-04-18 07:33:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 07:33:39,408 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:39,408 INFO L425 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:39,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:39,610 INFO L427 AbstractCegarLoop]: === Iteration 18 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:33:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash -130489249, now seen corresponding path program 31 times [2020-04-18 07:33:39,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:39,611 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1403228078] [2020-04-18 07:33:39,612 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:39,613 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-04-18 07:33:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-04-18 07:33:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 07:33:39,614 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:39,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:39,615 INFO L82 PathProgramCache]: Analyzing trace with hash -129610849, now seen corresponding path program 32 times [2020-04-18 07:33:39,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:39,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148803213] [2020-04-18 07:33:39,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:39,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148803213] [2020-04-18 07:33:39,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830972126] [2020-04-18 07:33:39,885 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 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 [2020-04-18 07:33:39,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:39,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:39,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 07:33:39,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:39,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:39,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-18 07:33:39,958 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:39,962 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:39,969 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 32 transitions. [2020-04-18 07:33:39,970 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:40,143 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:33:40,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 07:33:40,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:33:40,144 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 21 states. [2020-04-18 07:33:40,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:40,359 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-04-18 07:33:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-04-18 07:33:40,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:40,360 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1403228078] [2020-04-18 07:33:40,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:40,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-04-18 07:33:40,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1403228078] [2020-04-18 07:33:40,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 07:33:40,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 07:33:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:33:40,362 INFO L87 Difference]: Start difference. First operand 67 states and 121 transitions. Second operand 21 states. [2020-04-18 07:33:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:40,420 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2020-04-18 07:33:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 07:33:40,421 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-04-18 07:33:40,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:40,421 INFO L225 Difference]: With dead ends: 68 [2020-04-18 07:33:40,421 INFO L226 Difference]: Without dead ends: 68 [2020-04-18 07:33:40,422 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:33:40,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-18 07:33:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-04-18 07:33:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-18 07:33:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 122 transitions. [2020-04-18 07:33:40,424 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 122 transitions. Word has length 26 [2020-04-18 07:33:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:40,424 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 122 transitions. [2020-04-18 07:33:40,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 07:33:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 122 transitions. [2020-04-18 07:33:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 07:33:40,424 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:40,424 INFO L425 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:40,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:40,625 INFO L427 AbstractCegarLoop]: === Iteration 19 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:33:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1179092618, now seen corresponding path program 33 times [2020-04-18 07:33:40,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:40,626 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [461165251] [2020-04-18 07:33:40,627 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:40,627 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 35 transitions. [2020-04-18 07:33:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-04-18 07:33:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 07:33:40,628 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1178214218, now seen corresponding path program 34 times [2020-04-18 07:33:40,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:40,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557222933] [2020-04-18 07:33:40,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:40,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557222933] [2020-04-18 07:33:40,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667132150] [2020-04-18 07:33:40,876 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 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 [2020-04-18 07:33:40,949 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:40,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:40,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 07:33:40,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:40,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:40,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-18 07:33:40,961 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:40,966 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:40,973 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 33 transitions. [2020-04-18 07:33:40,974 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:41,150 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:33:41,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 07:33:41,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:33:41,151 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 22 states. [2020-04-18 07:33:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:41,388 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-04-18 07:33:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-04-18 07:33:41,389 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:41,389 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [461165251] [2020-04-18 07:33:41,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:41,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-04-18 07:33:41,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [461165251] [2020-04-18 07:33:41,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 07:33:41,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:41,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 07:33:41,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:33:41,391 INFO L87 Difference]: Start difference. First operand 68 states and 122 transitions. Second operand 22 states. [2020-04-18 07:33:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:41,445 INFO L93 Difference]: Finished difference Result 69 states and 123 transitions. [2020-04-18 07:33:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-18 07:33:41,453 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-04-18 07:33:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:41,454 INFO L225 Difference]: With dead ends: 69 [2020-04-18 07:33:41,454 INFO L226 Difference]: Without dead ends: 69 [2020-04-18 07:33:41,455 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:33:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-18 07:33:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-04-18 07:33:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-18 07:33:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 123 transitions. [2020-04-18 07:33:41,458 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 123 transitions. Word has length 27 [2020-04-18 07:33:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:41,458 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 123 transitions. [2020-04-18 07:33:41,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 07:33:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 123 transitions. [2020-04-18 07:33:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 07:33:41,459 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:41,459 INFO L425 BasicCegarLoop]: trace histogram [19, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:41,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:41,662 INFO L427 AbstractCegarLoop]: === Iteration 20 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:33:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash 673941311, now seen corresponding path program 35 times [2020-04-18 07:33:41,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:41,663 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [921241373] [2020-04-18 07:33:41,663 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:41,664 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-04-18 07:33:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-04-18 07:33:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 07:33:41,664 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:41,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:41,664 INFO L82 PathProgramCache]: Analyzing trace with hash 674819711, now seen corresponding path program 36 times [2020-04-18 07:33:41,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:41,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997443837] [2020-04-18 07:33:41,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:33:41,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997443837] [2020-04-18 07:33:41,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742871771] [2020-04-18 07:33:41,913 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 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 [2020-04-18 07:33:41,967 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:41,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:41,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:33:41,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:41,984 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:33:41,984 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 252 [2020-04-18 07:33:41,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,996 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:33:42,085 INFO L619 ElimStorePlain]: treesize reduction 610, result has 3.8 percent of original size [2020-04-18 07:33:42,086 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:33:42,086 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:33:42,134 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:33:42,134 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:33:42,141 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:33:42,141 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:33:42,141 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:33:42,174 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:33:42,175 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:33:42,183 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:33:42,184 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:33:42,184 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:33:42,259 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:33:42,260 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:33:42,266 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:33:42,266 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:33:42,267 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:33:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-04-18 07:33:42,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:42,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [21] total 27 [2020-04-18 07:33:42,297 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:42,302 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:42,311 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 34 transitions. [2020-04-18 07:33:42,311 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:42,698 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:33:42,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:33:42,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:33:42,699 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 28 states. [2020-04-18 07:33:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:43,601 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-04-18 07:33:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-04-18 07:33:43,601 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:43,602 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [921241373] [2020-04-18 07:33:43,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:43,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:33:43,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [921241373] [2020-04-18 07:33:43,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 07:33:43,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:33:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=1530, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 07:33:43,604 INFO L87 Difference]: Start difference. First operand 69 states and 123 transitions. Second operand 28 states. [2020-04-18 07:33:47,821 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 07:33:51,895 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 07:33:54,769 WARN L192 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 07:33:59,096 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 07:34:09,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:09,447 INFO L93 Difference]: Finished difference Result 116 states and 217 transitions. [2020-04-18 07:34:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 07:34:09,447 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2020-04-18 07:34:09,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:09,448 INFO L225 Difference]: With dead ends: 116 [2020-04-18 07:34:09,448 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 07:34:09,450 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=1294, Invalid=2245, Unknown=1, NotChecked=0, Total=3540 [2020-04-18 07:34:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 07:34:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 70. [2020-04-18 07:34:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-18 07:34:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 124 transitions. [2020-04-18 07:34:09,453 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 124 transitions. Word has length 28 [2020-04-18 07:34:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:09,453 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 124 transitions. [2020-04-18 07:34:09,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 07:34:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 124 transitions. [2020-04-18 07:34:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 07:34:09,454 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:09,454 INFO L425 BasicCegarLoop]: trace histogram [20, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:09,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:09,655 INFO L427 AbstractCegarLoop]: === Iteration 21 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:34:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:09,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2011549034, now seen corresponding path program 37 times [2020-04-18 07:34:09,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:09,656 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1069853271] [2020-04-18 07:34:09,657 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:09,658 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 37 transitions. [2020-04-18 07:34:09,658 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-04-18 07:34:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 07:34:09,659 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:09,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2010670634, now seen corresponding path program 38 times [2020-04-18 07:34:09,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:09,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515726488] [2020-04-18 07:34:09,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:09,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515726488] [2020-04-18 07:34:09,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370653978] [2020-04-18 07:34:09,960 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 [2020-04-18 07:34:10,043 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:10,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:10,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-18 07:34:10,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:10,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:10,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-18 07:34:10,068 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:10,073 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:10,081 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 35 transitions. [2020-04-18 07:34:10,081 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:10,290 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:34:10,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:34:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:34:10,291 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 24 states. [2020-04-18 07:34:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:10,581 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-04-18 07:34:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-04-18 07:34:10,582 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:10,582 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1069853271] [2020-04-18 07:34:10,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:10,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-04-18 07:34:10,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1069853271] [2020-04-18 07:34:10,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 07:34:10,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:34:10,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:34:10,584 INFO L87 Difference]: Start difference. First operand 70 states and 124 transitions. Second operand 24 states. [2020-04-18 07:34:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:10,615 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2020-04-18 07:34:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 07:34:10,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-04-18 07:34:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:10,616 INFO L225 Difference]: With dead ends: 71 [2020-04-18 07:34:10,616 INFO L226 Difference]: Without dead ends: 71 [2020-04-18 07:34:10,618 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:34:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-18 07:34:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-04-18 07:34:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 07:34:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 125 transitions. [2020-04-18 07:34:10,621 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 125 transitions. Word has length 29 [2020-04-18 07:34:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:10,622 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 125 transitions. [2020-04-18 07:34:10,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 07:34:10,622 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 125 transitions. [2020-04-18 07:34:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 07:34:10,626 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:10,627 INFO L425 BasicCegarLoop]: trace histogram [21, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:10,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:10,828 INFO L427 AbstractCegarLoop]: === Iteration 22 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:34:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash 637596191, now seen corresponding path program 39 times [2020-04-18 07:34:10,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:10,829 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [324936664] [2020-04-18 07:34:10,830 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:10,831 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 38 transitions. [2020-04-18 07:34:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 07:34:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 07:34:10,832 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:10,832 INFO L82 PathProgramCache]: Analyzing trace with hash 638474591, now seen corresponding path program 40 times [2020-04-18 07:34:10,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:10,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012838771] [2020-04-18 07:34:10,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:11,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012838771] [2020-04-18 07:34:11,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387369546] [2020-04-18 07:34:11,101 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:11,162 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:11,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:11,164 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-18 07:34:11,165 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:11,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:11,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-18 07:34:11,186 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:11,192 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:11,202 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 36 transitions. [2020-04-18 07:34:11,202 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:11,425 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:34:11,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 07:34:11,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:34:11,426 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 25 states. [2020-04-18 07:34:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:11,724 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-04-18 07:34:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-04-18 07:34:11,725 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:11,725 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [324936664] [2020-04-18 07:34:11,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:11,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-04-18 07:34:11,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [324936664] [2020-04-18 07:34:11,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 07:34:11,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:11,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 07:34:11,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:34:11,726 INFO L87 Difference]: Start difference. First operand 71 states and 125 transitions. Second operand 25 states. [2020-04-18 07:34:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:11,762 INFO L93 Difference]: Finished difference Result 72 states and 126 transitions. [2020-04-18 07:34:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-18 07:34:11,763 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2020-04-18 07:34:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:11,763 INFO L225 Difference]: With dead ends: 72 [2020-04-18 07:34:11,763 INFO L226 Difference]: Without dead ends: 72 [2020-04-18 07:34:11,764 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:34:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-18 07:34:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-04-18 07:34:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-18 07:34:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 126 transitions. [2020-04-18 07:34:11,766 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 126 transitions. Word has length 30 [2020-04-18 07:34:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:11,767 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 126 transitions. [2020-04-18 07:34:11,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 07:34:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 126 transitions. [2020-04-18 07:34:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 07:34:11,767 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:11,767 INFO L425 BasicCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:11,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:11,971 INFO L427 AbstractCegarLoop]: === Iteration 23 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:34:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:11,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1156719542, now seen corresponding path program 41 times [2020-04-18 07:34:11,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:11,972 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [948575361] [2020-04-18 07:34:11,973 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:11,974 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 39 transitions. [2020-04-18 07:34:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-04-18 07:34:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 07:34:11,974 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1157597942, now seen corresponding path program 42 times [2020-04-18 07:34:11,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:11,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849148469] [2020-04-18 07:34:11,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:12,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849148469] [2020-04-18 07:34:12,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748582429] [2020-04-18 07:34:12,276 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 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 [2020-04-18 07:34:12,338 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:34:12,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:12,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:34:12,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:12,350 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:34:12,351 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 109 [2020-04-18 07:34:12,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:12,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:12,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:12,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:12,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:12,354 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:34:12,408 INFO L619 ElimStorePlain]: treesize reduction 161, result has 13.0 percent of original size [2020-04-18 07:34:12,409 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:34:12,409 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:34:12,452 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:34:12,453 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:34:12,460 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:34:12,460 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:34:12,461 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:34:12,494 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:34:12,494 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:34:12,503 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:34:12,504 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:34:12,505 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:34:12,579 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:34:12,580 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:34:12,586 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:34:12,586 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:34:12,587 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:34:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-04-18 07:34:12,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:12,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [24] total 30 [2020-04-18 07:34:12,615 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:12,621 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:12,631 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 37 transitions. [2020-04-18 07:34:12,631 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:13,046 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:34:13,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 07:34:13,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:34:13,047 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 31 states. [2020-04-18 07:34:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:14,065 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-04-18 07:34:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-04-18 07:34:14,065 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:14,066 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [948575361] [2020-04-18 07:34:14,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:14,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:34:14,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [948575361] [2020-04-18 07:34:14,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-04-18 07:34:14,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 07:34:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=936, Invalid=1926, Unknown=0, NotChecked=0, Total=2862 [2020-04-18 07:34:14,068 INFO L87 Difference]: Start difference. First operand 72 states and 126 transitions. Second operand 31 states. [2020-04-18 07:34:18,969 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 07:34:23,048 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 07:34:25,969 WARN L192 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 07:34:30,514 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 07:34:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:37,607 INFO L93 Difference]: Finished difference Result 119 states and 220 transitions. [2020-04-18 07:34:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 07:34:37,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2020-04-18 07:34:37,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:37,608 INFO L225 Difference]: With dead ends: 119 [2020-04-18 07:34:37,609 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 07:34:37,610 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=1576, Invalid=2713, Unknown=1, NotChecked=0, Total=4290 [2020-04-18 07:34:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 07:34:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 73. [2020-04-18 07:34:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-18 07:34:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-04-18 07:34:37,614 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 31 [2020-04-18 07:34:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:37,614 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-04-18 07:34:37,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-04-18 07:34:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-04-18 07:34:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 07:34:37,615 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:37,615 INFO L425 BasicCegarLoop]: trace histogram [23, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:37,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:37,819 INFO L427 AbstractCegarLoop]: === Iteration 24 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:34:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:37,819 INFO L82 PathProgramCache]: Analyzing trace with hash 69674239, now seen corresponding path program 43 times [2020-04-18 07:34:37,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:37,820 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1004767090] [2020-04-18 07:34:37,820 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:37,821 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 40 transitions. [2020-04-18 07:34:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-04-18 07:34:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 07:34:37,822 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash 70552639, now seen corresponding path program 44 times [2020-04-18 07:34:37,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:37,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690761948] [2020-04-18 07:34:37,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:38,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690761948] [2020-04-18 07:34:38,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382373268] [2020-04-18 07:34:38,162 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 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 [2020-04-18 07:34:38,226 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:38,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:38,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-18 07:34:38,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:38,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:38,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-04-18 07:34:38,249 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:38,254 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:38,263 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 38 transitions. [2020-04-18 07:34:38,263 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:38,610 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:34:38,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 07:34:38,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 07:34:38,611 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 27 states. [2020-04-18 07:34:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:38,943 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-04-18 07:34:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-04-18 07:34:38,943 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:38,944 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1004767090] [2020-04-18 07:34:38,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:38,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-04-18 07:34:38,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1004767090] [2020-04-18 07:34:38,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-18 07:34:38,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:38,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 07:34:38,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 07:34:38,946 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 27 states. [2020-04-18 07:34:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:38,996 INFO L93 Difference]: Finished difference Result 74 states and 128 transitions. [2020-04-18 07:34:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 07:34:38,996 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2020-04-18 07:34:38,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:38,997 INFO L225 Difference]: With dead ends: 74 [2020-04-18 07:34:38,997 INFO L226 Difference]: Without dead ends: 74 [2020-04-18 07:34:38,998 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 07:34:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-18 07:34:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-04-18 07:34:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-18 07:34:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2020-04-18 07:34:39,001 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 32 [2020-04-18 07:34:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:39,002 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2020-04-18 07:34:39,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-18 07:34:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2020-04-18 07:34:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 07:34:39,002 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:39,002 INFO L425 BasicCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:39,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:39,205 INFO L427 AbstractCegarLoop]: === Iteration 25 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:34:39,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:39,206 INFO L82 PathProgramCache]: Analyzing trace with hash 731008214, now seen corresponding path program 45 times [2020-04-18 07:34:39,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:39,206 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1095696365] [2020-04-18 07:34:39,207 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:39,208 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 41 transitions. [2020-04-18 07:34:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-04-18 07:34:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 07:34:39,209 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash 731886614, now seen corresponding path program 46 times [2020-04-18 07:34:39,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:39,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638208202] [2020-04-18 07:34:39,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:39,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638208202] [2020-04-18 07:34:39,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512947171] [2020-04-18 07:34:39,624 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 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 [2020-04-18 07:34:39,691 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:39,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:39,692 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-18 07:34:39,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:39,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:39,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-04-18 07:34:39,707 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:39,715 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:39,727 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 39 transitions. [2020-04-18 07:34:39,727 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:40,034 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:34:40,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:34:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:34:40,035 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 28 states. [2020-04-18 07:34:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:40,391 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-04-18 07:34:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-04-18 07:34:40,392 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:40,392 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1095696365] [2020-04-18 07:34:40,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:40,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-04-18 07:34:40,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1095696365] [2020-04-18 07:34:40,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 07:34:40,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:40,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:34:40,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:34:40,394 INFO L87 Difference]: Start difference. First operand 74 states and 128 transitions. Second operand 28 states. [2020-04-18 07:34:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:40,443 INFO L93 Difference]: Finished difference Result 75 states and 129 transitions. [2020-04-18 07:34:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 07:34:40,444 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 33 [2020-04-18 07:34:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:40,445 INFO L225 Difference]: With dead ends: 75 [2020-04-18 07:34:40,445 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 07:34:40,446 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:34:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 07:34:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-04-18 07:34:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-18 07:34:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 129 transitions. [2020-04-18 07:34:40,449 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 129 transitions. Word has length 33 [2020-04-18 07:34:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:40,449 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 129 transitions. [2020-04-18 07:34:40,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 07:34:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 129 transitions. [2020-04-18 07:34:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-18 07:34:40,450 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:40,450 INFO L425 BasicCegarLoop]: trace histogram [25, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:40,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:40,653 INFO L427 AbstractCegarLoop]: === Iteration 26 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:34:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:40,654 INFO L82 PathProgramCache]: Analyzing trace with hash -242475041, now seen corresponding path program 47 times [2020-04-18 07:34:40,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:40,654 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [341752138] [2020-04-18 07:34:40,656 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:40,657 INFO L259 McrAutomatonBuilder]: Finished intersection with 39 states and 42 transitions. [2020-04-18 07:34:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-04-18 07:34:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-18 07:34:40,658 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash -241596641, now seen corresponding path program 48 times [2020-04-18 07:34:40,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:40,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600673556] [2020-04-18 07:34:40,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:34:41,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600673556] [2020-04-18 07:34:41,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894440963] [2020-04-18 07:34:41,006 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 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 [2020-04-18 07:34:41,062 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:34:41,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:41,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:34:41,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:41,076 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:34:41,077 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 92 [2020-04-18 07:34:41,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:41,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:41,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:41,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:41,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:41,082 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:34:41,141 INFO L619 ElimStorePlain]: treesize reduction 109, result has 18.0 percent of original size [2020-04-18 07:34:41,142 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:34:41,142 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:34:41,198 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:34:41,198 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:34:41,218 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:34:41,219 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:34:41,219 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:34:41,254 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:34:41,255 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:34:41,264 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:34:41,265 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:34:41,265 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:34:41,349 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:34:41,350 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:34:41,355 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:34:41,355 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:34:41,356 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:34:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-04-18 07:34:41,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:41,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [27] total 33 [2020-04-18 07:34:41,392 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:41,401 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:41,416 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 40 transitions. [2020-04-18 07:34:41,417 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:42,002 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:34:42,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 07:34:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=729, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 07:34:42,003 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 34 states. [2020-04-18 07:34:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:43,319 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-04-18 07:34:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-04-18 07:34:43,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:43,320 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [341752138] [2020-04-18 07:34:43,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:43,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:34:43,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [341752138] [2020-04-18 07:34:43,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-04-18 07:34:43,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:43,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 07:34:43,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=2367, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:34:43,325 INFO L87 Difference]: Start difference. First operand 75 states and 129 transitions. Second operand 34 states. [2020-04-18 07:34:47,517 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 07:34:52,416 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 07:34:55,241 WARN L192 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 07:34:58,117 WARN L192 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 07:35:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:06,869 INFO L93 Difference]: Finished difference Result 122 states and 223 transitions. [2020-04-18 07:35:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-18 07:35:06,869 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2020-04-18 07:35:06,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:06,870 INFO L225 Difference]: With dead ends: 122 [2020-04-18 07:35:06,870 INFO L226 Difference]: Without dead ends: 122 [2020-04-18 07:35:06,872 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=1885, Invalid=3226, Unknown=1, NotChecked=0, Total=5112 [2020-04-18 07:35:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-18 07:35:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 76. [2020-04-18 07:35:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-18 07:35:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 130 transitions. [2020-04-18 07:35:06,875 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 130 transitions. Word has length 34 [2020-04-18 07:35:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:06,875 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 130 transitions. [2020-04-18 07:35:06,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-04-18 07:35:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 130 transitions. [2020-04-18 07:35:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 07:35:06,876 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:06,876 INFO L425 BasicCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:07,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:07,080 INFO L427 AbstractCegarLoop]: === Iteration 27 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:35:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:07,080 INFO L82 PathProgramCache]: Analyzing trace with hash -355684874, now seen corresponding path program 49 times [2020-04-18 07:35:07,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:07,080 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [284345427] [2020-04-18 07:35:07,082 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:07,083 INFO L259 McrAutomatonBuilder]: Finished intersection with 40 states and 43 transitions. [2020-04-18 07:35:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-04-18 07:35:07,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 07:35:07,084 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash -354806474, now seen corresponding path program 50 times [2020-04-18 07:35:07,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:07,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31082787] [2020-04-18 07:35:07,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:07,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31082787] [2020-04-18 07:35:07,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19925678] [2020-04-18 07:35:07,488 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 [2020-04-18 07:35:07,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:07,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:07,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2020-04-18 07:35:07,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:07,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:07,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-04-18 07:35:07,568 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:07,575 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:07,590 INFO L259 McrAutomatonBuilder]: Finished intersection with 39 states and 41 transitions. [2020-04-18 07:35:07,590 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:07,928 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:35:07,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 07:35:07,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:35:07,929 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 30 states. [2020-04-18 07:35:08,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:08,348 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-04-18 07:35:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-04-18 07:35:08,348 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:08,349 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [284345427] [2020-04-18 07:35:08,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:08,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-04-18 07:35:08,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [284345427] [2020-04-18 07:35:08,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-04-18 07:35:08,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:08,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 07:35:08,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:35:08,350 INFO L87 Difference]: Start difference. First operand 76 states and 130 transitions. Second operand 30 states. [2020-04-18 07:35:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:08,396 INFO L93 Difference]: Finished difference Result 77 states and 131 transitions. [2020-04-18 07:35:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 07:35:08,400 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2020-04-18 07:35:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:08,401 INFO L225 Difference]: With dead ends: 77 [2020-04-18 07:35:08,401 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 07:35:08,402 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:35:08,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 07:35:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-04-18 07:35:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-18 07:35:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 131 transitions. [2020-04-18 07:35:08,404 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 131 transitions. Word has length 35 [2020-04-18 07:35:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:08,404 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 131 transitions. [2020-04-18 07:35:08,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-04-18 07:35:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 131 transitions. [2020-04-18 07:35:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-18 07:35:08,405 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:08,405 INFO L425 BasicCegarLoop]: trace histogram [27, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:08,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:08,606 INFO L427 AbstractCegarLoop]: === Iteration 28 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:35:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash 429777599, now seen corresponding path program 51 times [2020-04-18 07:35:08,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:08,607 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [811306746] [2020-04-18 07:35:08,608 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:08,609 INFO L259 McrAutomatonBuilder]: Finished intersection with 41 states and 44 transitions. [2020-04-18 07:35:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-04-18 07:35:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-18 07:35:08,610 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:08,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:08,610 INFO L82 PathProgramCache]: Analyzing trace with hash 430655999, now seen corresponding path program 52 times [2020-04-18 07:35:08,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:08,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42133667] [2020-04-18 07:35:08,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:09,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42133667] [2020-04-18 07:35:09,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800665661] [2020-04-18 07:35:09,201 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:09,296 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:09,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:09,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2020-04-18 07:35:09,299 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:09,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:09,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-04-18 07:35:09,310 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:09,318 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:09,333 INFO L259 McrAutomatonBuilder]: Finished intersection with 40 states and 42 transitions. [2020-04-18 07:35:09,334 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:09,670 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:35:09,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 07:35:09,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:35:09,671 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 31 states. [2020-04-18 07:35:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:10,115 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-04-18 07:35:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-04-18 07:35:10,115 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:10,116 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [811306746] [2020-04-18 07:35:10,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:10,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-04-18 07:35:10,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [811306746] [2020-04-18 07:35:10,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-04-18 07:35:10,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:10,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 07:35:10,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:35:10,118 INFO L87 Difference]: Start difference. First operand 77 states and 131 transitions. Second operand 31 states. [2020-04-18 07:35:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:10,166 INFO L93 Difference]: Finished difference Result 78 states and 132 transitions. [2020-04-18 07:35:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-18 07:35:10,166 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 36 [2020-04-18 07:35:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:10,167 INFO L225 Difference]: With dead ends: 78 [2020-04-18 07:35:10,167 INFO L226 Difference]: Without dead ends: 78 [2020-04-18 07:35:10,168 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:35:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-18 07:35:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-04-18 07:35:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 07:35:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 132 transitions. [2020-04-18 07:35:10,170 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 132 transitions. Word has length 36 [2020-04-18 07:35:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:10,170 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 132 transitions. [2020-04-18 07:35:10,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-04-18 07:35:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 132 transitions. [2020-04-18 07:35:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 07:35:10,171 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:10,171 INFO L425 BasicCegarLoop]: trace histogram [28, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:10,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:10,374 INFO L427 AbstractCegarLoop]: === Iteration 29 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:35:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:10,375 INFO L82 PathProgramCache]: Analyzing trace with hash -990689514, now seen corresponding path program 53 times [2020-04-18 07:35:10,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:10,375 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1346907407] [2020-04-18 07:35:10,377 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:10,377 INFO L259 McrAutomatonBuilder]: Finished intersection with 42 states and 45 transitions. [2020-04-18 07:35:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-04-18 07:35:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 07:35:10,378 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:10,378 INFO L82 PathProgramCache]: Analyzing trace with hash -989811114, now seen corresponding path program 54 times [2020-04-18 07:35:10,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:10,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722566580] [2020-04-18 07:35:10,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:10,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722566580] [2020-04-18 07:35:10,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873997141] [2020-04-18 07:35:10,831 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 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 [2020-04-18 07:35:10,885 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:35:10,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:10,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:35:10,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:10,897 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:35:10,897 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 130 [2020-04-18 07:35:10,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,902 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:35:10,957 INFO L619 ElimStorePlain]: treesize reduction 146, result has 14.1 percent of original size [2020-04-18 07:35:10,958 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:35:10,958 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:35:11,002 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:35:11,016 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:35:11,024 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:35:11,025 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:35:11,025 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:35:11,065 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:35:11,066 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:35:11,080 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:35:11,081 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:35:11,081 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:35:11,163 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:35:11,164 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:35:11,169 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:35:11,169 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:35:11,170 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:35:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-04-18 07:35:11,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:11,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [30] total 36 [2020-04-18 07:35:11,200 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:11,209 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:11,222 INFO L259 McrAutomatonBuilder]: Finished intersection with 41 states and 43 transitions. [2020-04-18 07:35:11,222 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:11,803 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:35:11,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 07:35:11,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 07:35:11,804 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 37 states. [2020-04-18 07:35:13,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:13,242 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-04-18 07:35:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-04-18 07:35:13,242 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:13,243 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1346907407] [2020-04-18 07:35:13,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:13,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:35:13,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1346907407] [2020-04-18 07:35:13,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-18 07:35:13,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 07:35:13,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=2853, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 07:35:13,245 INFO L87 Difference]: Start difference. First operand 78 states and 132 transitions. Second operand 37 states. [2020-04-18 07:35:17,457 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 07:35:21,585 WARN L192 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 07:35:25,634 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 07:35:29,887 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 07:35:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:34,438 INFO L93 Difference]: Finished difference Result 125 states and 226 transitions. [2020-04-18 07:35:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 07:35:34,439 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2020-04-18 07:35:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:34,440 INFO L225 Difference]: With dead ends: 125 [2020-04-18 07:35:34,440 INFO L226 Difference]: Without dead ends: 125 [2020-04-18 07:35:34,442 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=2222, Invalid=3784, Unknown=0, NotChecked=0, Total=6006 [2020-04-18 07:35:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-18 07:35:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-04-18 07:35:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-18 07:35:34,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 133 transitions. [2020-04-18 07:35:34,445 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 133 transitions. Word has length 37 [2020-04-18 07:35:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:34,446 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 133 transitions. [2020-04-18 07:35:34,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-04-18 07:35:34,446 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 133 transitions. [2020-04-18 07:35:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-18 07:35:34,446 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:34,446 INFO L425 BasicCegarLoop]: trace histogram [29, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:34,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:34,653 INFO L427 AbstractCegarLoop]: === Iteration 30 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:35:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:34,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2075497057, now seen corresponding path program 55 times [2020-04-18 07:35:34,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:34,654 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [216785767] [2020-04-18 07:35:34,655 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:34,656 INFO L259 McrAutomatonBuilder]: Finished intersection with 43 states and 46 transitions. [2020-04-18 07:35:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-04-18 07:35:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-18 07:35:34,657 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2074618657, now seen corresponding path program 56 times [2020-04-18 07:35:34,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:34,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286251250] [2020-04-18 07:35:34,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:35,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286251250] [2020-04-18 07:35:35,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415662754] [2020-04-18 07:35:35,360 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 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 [2020-04-18 07:35:35,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:35,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:35,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2020-04-18 07:35:35,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:35,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:35,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-04-18 07:35:35,502 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:35,522 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:35,607 INFO L259 McrAutomatonBuilder]: Finished intersection with 42 states and 44 transitions. [2020-04-18 07:35:35,607 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:36,064 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:35:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 07:35:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 07:35:36,065 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 33 states. [2020-04-18 07:35:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:36,561 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-04-18 07:35:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-04-18 07:35:36,562 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:36,562 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [216785767] [2020-04-18 07:35:36,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:36,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-04-18 07:35:36,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [216785767] [2020-04-18 07:35:36,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-04-18 07:35:36,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:36,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 07:35:36,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 07:35:36,564 INFO L87 Difference]: Start difference. First operand 79 states and 133 transitions. Second operand 33 states. [2020-04-18 07:35:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:36,626 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2020-04-18 07:35:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 07:35:36,626 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 38 [2020-04-18 07:35:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:36,627 INFO L225 Difference]: With dead ends: 80 [2020-04-18 07:35:36,627 INFO L226 Difference]: Without dead ends: 80 [2020-04-18 07:35:36,628 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 07:35:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-18 07:35:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-04-18 07:35:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-18 07:35:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 134 transitions. [2020-04-18 07:35:36,630 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 134 transitions. Word has length 38 [2020-04-18 07:35:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:36,631 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 134 transitions. [2020-04-18 07:35:36,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-04-18 07:35:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2020-04-18 07:35:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-04-18 07:35:36,631 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:36,631 INFO L425 BasicCegarLoop]: trace histogram [30, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:36,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:36,837 INFO L427 AbstractCegarLoop]: === Iteration 31 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:35:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:36,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1344792522, now seen corresponding path program 57 times [2020-04-18 07:35:36,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:36,838 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1917483759] [2020-04-18 07:35:36,838 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:36,839 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 47 transitions. [2020-04-18 07:35:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:35:36,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-04-18 07:35:36,839 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:36,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:36,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1343914122, now seen corresponding path program 58 times [2020-04-18 07:35:36,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:36,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844790143] [2020-04-18 07:35:36,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:37,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844790143] [2020-04-18 07:35:37,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79777337] [2020-04-18 07:35:37,314 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 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 [2020-04-18 07:35:37,384 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:37,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:37,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 32 conjunts are in the unsatisfiable core [2020-04-18 07:35:37,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:37,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:37,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-04-18 07:35:37,401 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:37,410 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:37,465 INFO L259 McrAutomatonBuilder]: Finished intersection with 43 states and 45 transitions. [2020-04-18 07:35:37,466 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:37,908 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:35:37,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 07:35:37,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 07:35:37,908 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 34 states. [2020-04-18 07:35:38,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:38,436 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-04-18 07:35:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-04-18 07:35:38,436 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:38,437 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1917483759] [2020-04-18 07:35:38,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:38,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-04-18 07:35:38,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1917483759] [2020-04-18 07:35:38,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-04-18 07:35:38,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:38,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 07:35:38,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 07:35:38,439 INFO L87 Difference]: Start difference. First operand 80 states and 134 transitions. Second operand 34 states. [2020-04-18 07:35:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:38,493 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-04-18 07:35:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 07:35:38,498 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2020-04-18 07:35:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:38,499 INFO L225 Difference]: With dead ends: 81 [2020-04-18 07:35:38,499 INFO L226 Difference]: Without dead ends: 81 [2020-04-18 07:35:38,499 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 07:35:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-18 07:35:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-04-18 07:35:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-18 07:35:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 135 transitions. [2020-04-18 07:35:38,502 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 135 transitions. Word has length 39 [2020-04-18 07:35:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:38,502 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 135 transitions. [2020-04-18 07:35:38,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-04-18 07:35:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 135 transitions. [2020-04-18 07:35:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 07:35:38,503 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:38,503 INFO L425 BasicCegarLoop]: trace histogram [31, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:38,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:38,707 INFO L427 AbstractCegarLoop]: === Iteration 32 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:35:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash -167788417, now seen corresponding path program 59 times [2020-04-18 07:35:38,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:38,708 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [963441846] [2020-04-18 07:35:38,710 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:38,711 INFO L259 McrAutomatonBuilder]: Finished intersection with 45 states and 48 transitions. [2020-04-18 07:35:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-04-18 07:35:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 07:35:38,712 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:38,712 INFO L82 PathProgramCache]: Analyzing trace with hash -166910017, now seen corresponding path program 60 times [2020-04-18 07:35:38,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:38,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016204696] [2020-04-18 07:35:38,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:39,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016204696] [2020-04-18 07:35:39,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687081952] [2020-04-18 07:35:39,184 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:39,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:35:39,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:39,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:35:39,243 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:39,270 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:35:39,271 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 197 [2020-04-18 07:35:39,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:39,301 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:35:39,390 INFO L619 ElimStorePlain]: treesize reduction 499, result has 4.6 percent of original size [2020-04-18 07:35:39,391 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:35:39,392 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:35:39,444 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:35:39,445 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:35:39,454 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:35:39,454 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:35:39,455 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:35:39,507 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:35:39,507 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:35:39,515 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:35:39,516 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:35:39,516 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:35:39,600 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:35:39,601 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:35:39,605 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:35:39,606 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:35:39,606 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:35:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-04-18 07:35:39,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:39,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [33] total 39 [2020-04-18 07:35:39,643 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:39,649 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:39,664 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 46 transitions. [2020-04-18 07:35:39,664 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:40,335 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:35:40,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-04-18 07:35:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=984, Unknown=0, NotChecked=0, Total=1560 [2020-04-18 07:35:40,336 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 40 states. [2020-04-18 07:35:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:42,025 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-04-18 07:35:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-04-18 07:35:42,025 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:42,026 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [963441846] [2020-04-18 07:35:42,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:42,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:35:42,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [963441846] [2020-04-18 07:35:42,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-04-18 07:35:42,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-04-18 07:35:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1728, Invalid=3384, Unknown=0, NotChecked=0, Total=5112 [2020-04-18 07:35:42,028 INFO L87 Difference]: Start difference. First operand 81 states and 135 transitions. Second operand 40 states. [2020-04-18 07:35:46,234 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-04-18 07:35:51,538 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-04-18 07:35:55,890 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 39 [2020-04-18 07:35:59,091 WARN L192 SmtUtils]: Spent 3.03 s on a formula simplification that was a NOOP. DAG size: 43 [2020-04-18 07:36:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:08,953 INFO L93 Difference]: Finished difference Result 133 states and 241 transitions. [2020-04-18 07:36:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-18 07:36:08,954 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2020-04-18 07:36:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:36:08,955 INFO L225 Difference]: With dead ends: 133 [2020-04-18 07:36:08,955 INFO L226 Difference]: Without dead ends: 133 [2020-04-18 07:36:08,956 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=2655, Invalid=4484, Unknown=1, NotChecked=0, Total=7140 [2020-04-18 07:36:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-18 07:36:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 82. [2020-04-18 07:36:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-18 07:36:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 136 transitions. [2020-04-18 07:36:08,960 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 136 transitions. Word has length 40 [2020-04-18 07:36:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:36:08,960 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 136 transitions. [2020-04-18 07:36:08,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-04-18 07:36:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 136 transitions. [2020-04-18 07:36:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-18 07:36:08,960 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:36:08,961 INFO L425 BasicCegarLoop]: trace histogram [32, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:36:09,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:09,164 INFO L427 AbstractCegarLoop]: === Iteration 33 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:36:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:09,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1959600470, now seen corresponding path program 61 times [2020-04-18 07:36:09,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:36:09,165 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1846347303] [2020-04-18 07:36:09,167 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:09,167 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 49 transitions. [2020-04-18 07:36:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 07:36:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-18 07:36:09,168 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:36:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1960478870, now seen corresponding path program 62 times [2020-04-18 07:36:09,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:09,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670257824] [2020-04-18 07:36:09,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:36:09,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670257824] [2020-04-18 07:36:09,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170288122] [2020-04-18 07:36:09,722 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 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 [2020-04-18 07:36:09,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:36:09,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:09,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 34 conjunts are in the unsatisfiable core [2020-04-18 07:36:09,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:36:09,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:09,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-04-18 07:36:09,806 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:09,814 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:09,830 INFO L259 McrAutomatonBuilder]: Finished intersection with 45 states and 47 transitions. [2020-04-18 07:36:09,831 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:10,337 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:36:10,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-04-18 07:36:10,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:36:10,337 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 36 states. [2020-04-18 07:36:10,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:10,960 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-04-18 07:36:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-04-18 07:36:10,961 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:36:10,961 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1846347303] [2020-04-18 07:36:10,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:36:10,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-04-18 07:36:10,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1846347303] [2020-04-18 07:36:10,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-04-18 07:36:10,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:36:10,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-04-18 07:36:10,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:36:10,963 INFO L87 Difference]: Start difference. First operand 82 states and 136 transitions. Second operand 36 states. [2020-04-18 07:36:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:11,020 INFO L93 Difference]: Finished difference Result 83 states and 137 transitions. [2020-04-18 07:36:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 07:36:11,020 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-04-18 07:36:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:36:11,021 INFO L225 Difference]: With dead ends: 83 [2020-04-18 07:36:11,021 INFO L226 Difference]: Without dead ends: 83 [2020-04-18 07:36:11,022 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:36:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-18 07:36:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-04-18 07:36:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-18 07:36:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 137 transitions. [2020-04-18 07:36:11,025 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 137 transitions. Word has length 41 [2020-04-18 07:36:11,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:36:11,025 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 137 transitions. [2020-04-18 07:36:11,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-04-18 07:36:11,025 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 137 transitions. [2020-04-18 07:36:11,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 07:36:11,026 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:36:11,026 INFO L425 BasicCegarLoop]: trace histogram [33, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:36:11,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:11,227 INFO L427 AbstractCegarLoop]: === Iteration 34 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:36:11,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash -810820769, now seen corresponding path program 63 times [2020-04-18 07:36:11,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:36:11,228 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1100266717] [2020-04-18 07:36:11,229 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:11,230 INFO L259 McrAutomatonBuilder]: Finished intersection with 47 states and 50 transitions. [2020-04-18 07:36:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-04-18 07:36:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 07:36:11,231 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:36:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:11,231 INFO L82 PathProgramCache]: Analyzing trace with hash -809942369, now seen corresponding path program 64 times [2020-04-18 07:36:11,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:11,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187479336] [2020-04-18 07:36:11,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:36:11,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187479336] [2020-04-18 07:36:11,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118566779] [2020-04-18 07:36:11,778 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 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 [2020-04-18 07:36:11,852 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:36:11,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:11,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2020-04-18 07:36:11,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:36:11,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:11,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-04-18 07:36:11,868 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:11,878 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:11,902 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 48 transitions. [2020-04-18 07:36:11,902 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:12,547 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:36:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 07:36:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 07:36:12,548 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 37 states. [2020-04-18 07:36:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:13,203 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-04-18 07:36:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-04-18 07:36:13,204 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:36:13,204 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1100266717] [2020-04-18 07:36:13,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:36:13,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-04-18 07:36:13,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1100266717] [2020-04-18 07:36:13,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-18 07:36:13,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:36:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 07:36:13,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 07:36:13,206 INFO L87 Difference]: Start difference. First operand 83 states and 137 transitions. Second operand 37 states. [2020-04-18 07:36:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:13,283 INFO L93 Difference]: Finished difference Result 84 states and 138 transitions. [2020-04-18 07:36:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-18 07:36:13,283 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-04-18 07:36:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:36:13,284 INFO L225 Difference]: With dead ends: 84 [2020-04-18 07:36:13,284 INFO L226 Difference]: Without dead ends: 84 [2020-04-18 07:36:13,285 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 07:36:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-18 07:36:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-04-18 07:36:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-18 07:36:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 138 transitions. [2020-04-18 07:36:13,287 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 138 transitions. Word has length 42 [2020-04-18 07:36:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:36:13,288 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 138 transitions. [2020-04-18 07:36:13,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-04-18 07:36:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 138 transitions. [2020-04-18 07:36:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-18 07:36:13,288 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:36:13,288 INFO L425 BasicCegarLoop]: trace histogram [34, 2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:36:13,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:13,491 INFO L427 AbstractCegarLoop]: === Iteration 35 === [thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, thread_routineErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-04-18 07:36:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash -794533258, now seen corresponding path program 65 times [2020-04-18 07:36:13,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:36:13,492 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1822765419] [2020-04-18 07:36:13,493 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:13,494 INFO L259 McrAutomatonBuilder]: Finished intersection with 48 states and 51 transitions. [2020-04-18 07:36:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-04-18 07:36:13,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-18 07:36:13,496 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:36:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash -793654858, now seen corresponding path program 66 times [2020-04-18 07:36:13,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:13,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498329534] [2020-04-18 07:36:13,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:36:14,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498329534] [2020-04-18 07:36:14,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970616740] [2020-04-18 07:36:14,292 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 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 [2020-04-18 07:36:14,353 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:36:14,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:14,355 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-18 07:36:14,356 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:14,375 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:36:14,376 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 105 [2020-04-18 07:36:14,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:36:14,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:36:14,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:36:14,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:36:14,380 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:36:14,434 INFO L619 ElimStorePlain]: treesize reduction 250, result has 8.8 percent of original size [2020-04-18 07:36:14,434 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:36:14,434 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:8 [2020-04-18 07:36:14,500 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-04-18 07:36:14,501 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:36:14,510 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:36:14,510 INFO L539 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:36:14,511 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-04-18 07:36:14,556 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2020-04-18 07:36:14,557 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:36:14,567 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:36:14,568 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-18 07:36:14,568 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:30 [2020-04-18 07:36:14,705 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2020-04-18 07:36:14,705 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-18 07:36:14,713 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-18 07:36:14,714 INFO L539 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-18 07:36:14,714 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-04-18 07:36:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-04-18 07:36:14,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:36:14,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [36] total 42 [2020-04-18 07:36:14,770 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:14,785 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:14,818 INFO L259 McrAutomatonBuilder]: Finished intersection with 47 states and 49 transitions. [2020-04-18 07:36:14,818 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:15,756 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:36:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 07:36:15,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=1125, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 07:36:15,757 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 43 states. [2020-04-18 07:36:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:17,725 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-04-18 07:36:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-04-18 07:36:17,725 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:36:17,725 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1822765419] [2020-04-18 07:36:17,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:36:17,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:36:17,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1822765419] [2020-04-18 07:36:17,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-04-18 07:36:17,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:36:17,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 07:36:17,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2046, Invalid=3960, Unknown=0, NotChecked=0, Total=6006 [2020-04-18 07:36:17,727 INFO L87 Difference]: Start difference. First operand 84 states and 138 transitions. Second operand 43 states. Received shutdown request... [2020-04-18 07:36:21,940 WARN L209 SmtUtils]: Removed 7 from assertion stack [2020-04-18 07:36:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 07:36:22,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:22,141 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 07:36:22,146 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 07:36:22,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 07:36:22 BasicIcfg [2020-04-18 07:36:22,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 07:36:22,147 INFO L168 Benchmark]: Toolchain (without parser) took 277619.01 ms. Allocated memory was 136.3 MB in the beginning and 496.5 MB in the end (delta: 360.2 MB). Free memory was 98.9 MB in the beginning and 373.3 MB in the end (delta: -274.5 MB). Peak memory consumption was 85.7 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:22,148 INFO L168 Benchmark]: CDTParser took 1.33 ms. Allocated memory is still 136.3 MB. Free memory was 119.5 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-04-18 07:36:22,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1009.59 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 97.0 MB in the beginning and 130.9 MB in the end (delta: -34.0 MB). Peak memory consumption was 36.3 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:22,148 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.66 ms. Allocated memory is still 201.3 MB. Free memory was 130.9 MB in the beginning and 128.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:22,148 INFO L168 Benchmark]: Boogie Preprocessor took 37.57 ms. Allocated memory is still 201.3 MB. Free memory was 128.8 MB in the beginning and 126.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:22,149 INFO L168 Benchmark]: RCFGBuilder took 565.20 ms. Allocated memory is still 201.3 MB. Free memory was 126.7 MB in the beginning and 99.1 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:22,149 INFO L168 Benchmark]: TraceAbstraction took 275917.74 ms. Allocated memory was 201.3 MB in the beginning and 496.5 MB in the end (delta: 295.2 MB). Free memory was 98.4 MB in the beginning and 373.3 MB in the end (delta: -274.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:22,151 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.33 ms. Allocated memory is still 136.3 MB. Free memory was 119.5 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1009.59 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 97.0 MB in the beginning and 130.9 MB in the end (delta: -34.0 MB). Peak memory consumption was 36.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 62.66 ms. Allocated memory is still 201.3 MB. Free memory was 130.9 MB in the beginning and 128.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.57 ms. Allocated memory is still 201.3 MB. Free memory was 128.8 MB in the beginning and 126.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 565.20 ms. Allocated memory is still 201.3 MB. Free memory was 126.7 MB in the beginning and 99.1 MB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 275917.74 ms. Allocated memory was 201.3 MB in the beginning and 496.5 MB in the end (delta: 295.2 MB). Free memory was 98.4 MB in the beginning and 373.3 MB in the end (delta: -274.9 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.6s, 94 ProgramPointsBefore, 21 ProgramPointsAfterwards, 105 TransitionsBefore, 25 TransitionsAfterwards, 2652 CoEnabledTransitionPairs, 6 FixpointIterations, 20 TrivialSequentialCompositions, 57 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 11 ConcurrentYvCompositions, 7 ChoiceCompositions, 1310 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 14 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 2011 CheckedPairsTotal, 90 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 1010]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1010). Cancelled while BasicCegarLoop was constructing difference of abstraction (84states) and FLOYD_HOARE automaton (currently 40 states, 43 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 4030ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 275.7s, OverallIterations: 35, TraceHistogramMax: 34, AutomataDifference: 223.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 391 SDtfs, 3252 SDslu, 767 SDs, 0 SdLazy, 2058 SolverSat, 1008 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 72.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2287 GetRequests, 1233 SyntacticMatches, 0 SemanticMatches, 1053 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6599 ImplicationChecksByTransitivity, 160.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 34 MinimizatonAttempts, 457 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown