/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-divine/condvar.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 11:38:05,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 11:38:05,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 11:38:05,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 11:38:05,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 11:38:05,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 11:38:05,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 11:38:05,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 11:38:05,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 11:38:05,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 11:38:05,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 11:38:05,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 11:38:05,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 11:38:05,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 11:38:05,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 11:38:05,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 11:38:05,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 11:38:05,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 11:38:05,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 11:38:05,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 11:38:05,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 11:38:05,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 11:38:05,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 11:38:05,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 11:38:05,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 11:38:05,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 11:38:05,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 11:38:05,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 11:38:05,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 11:38:05,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 11:38:05,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 11:38:05,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 11:38:05,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 11:38:05,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 11:38:05,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 11:38:05,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 11:38:05,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 11:38:05,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 11:38:05,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 11:38:05,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 11:38:05,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 11:38:05,238 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 11:38:05,252 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 11:38:05,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 11:38:05,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 11:38:05,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 11:38:05,254 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 11:38:05,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 11:38:05,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 11:38:05,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 11:38:05,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 11:38:05,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 11:38:05,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 11:38:05,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 11:38:05,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 11:38:05,256 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 11:38:05,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 11:38:05,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 11:38:05,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 11:38:05,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 11:38:05,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 11:38:05,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 11:38:05,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 11:38:05,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:38:05,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 11:38:05,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 11:38:05,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 11:38:05,259 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 11:38:05,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 11:38:05,259 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 11:38:05,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 11:38:05,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 11:38:05,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 11:38:05,548 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 11:38:05,551 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 11:38:05,552 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 11:38:05,553 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 11:38:05,554 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/condvar.i [2020-04-18 11:38:05,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138964942/4e2fc2066312486388ddd33bd7947765/FLAGe53719ff2 [2020-04-18 11:38:06,132 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 11:38:06,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/condvar.i [2020-04-18 11:38:06,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138964942/4e2fc2066312486388ddd33bd7947765/FLAGe53719ff2 [2020-04-18 11:38:06,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138964942/4e2fc2066312486388ddd33bd7947765 [2020-04-18 11:38:06,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 11:38:06,464 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 11:38:06,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 11:38:06,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 11:38:06,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 11:38:06,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:38:06" (1/1) ... [2020-04-18 11:38:06,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d6d203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:06, skipping insertion in model container [2020-04-18 11:38:06,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:38:06" (1/1) ... [2020-04-18 11:38:06,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 11:38:06,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 11:38:06,691 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-04-18 11:38:07,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:38:07,033 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 11:38:07,054 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-04-18 11:38:07,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:38:07,197 INFO L208 MainTranslator]: Completed translation [2020-04-18 11:38:07,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07 WrapperNode [2020-04-18 11:38:07,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 11:38:07,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 11:38:07,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 11:38:07,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 11:38:07,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... [2020-04-18 11:38:07,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... [2020-04-18 11:38:07,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 11:38:07,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 11:38:07,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 11:38:07,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 11:38:07,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... [2020-04-18 11:38:07,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... [2020-04-18 11:38:07,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... [2020-04-18 11:38:07,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... [2020-04-18 11:38:07,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... [2020-04-18 11:38:07,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... [2020-04-18 11:38:07,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... [2020-04-18 11:38:07,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 11:38:07,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 11:38:07,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 11:38:07,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 11:38:07,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:38:07,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-18 11:38:07,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 11:38:07,350 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-04-18 11:38:07,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 11:38:07,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 11:38:07,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-04-18 11:38:07,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-04-18 11:38:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-04-18 11:38:07,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 11:38:07,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 11:38:07,353 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 11:38:07,733 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 11:38:07,734 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 11:38:07,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:38:07 BoogieIcfgContainer [2020-04-18 11:38:07,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 11:38:07,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 11:38:07,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 11:38:07,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 11:38:07,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 11:38:06" (1/3) ... [2020-04-18 11:38:07,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e824e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:38:07, skipping insertion in model container [2020-04-18 11:38:07,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:38:07" (2/3) ... [2020-04-18 11:38:07,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e824e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:38:07, skipping insertion in model container [2020-04-18 11:38:07,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:38:07" (3/3) ... [2020-04-18 11:38:07,746 INFO L109 eAbstractionObserver]: Analyzing ICFG condvar.i [2020-04-18 11:38:07,756 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 11:38:07,756 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 11:38:07,763 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 11:38:07,764 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 11:38:07,784 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,784 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,784 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,786 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,787 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,787 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,788 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,788 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,788 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,789 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,792 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,793 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,793 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,793 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,793 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,794 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:38:07,811 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 11:38:07,830 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 11:38:07,831 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 11:38:07,831 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 11:38:07,831 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 11:38:07,831 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 11:38:07,831 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 11:38:07,832 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 11:38:07,832 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 11:38:07,845 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 59 transitions, 126 flow [2020-04-18 11:38:07,846 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2020-04-18 11:38:07,887 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-04-18 11:38:07,887 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-18 11:38:07,892 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 58 events. 5/58 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2020-04-18 11:38:07,895 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2020-04-18 11:38:07,914 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-04-18 11:38:07,915 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-18 11:38:07,916 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 58 events. 5/58 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2020-04-18 11:38:07,917 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 352 [2020-04-18 11:38:07,918 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-18 11:38:09,235 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-04-18 11:38:09,782 WARN L192 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-04-18 11:38:09,926 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-04-18 11:38:09,930 INFO L206 etLargeBlockEncoding]: Checked pairs total: 294 [2020-04-18 11:38:09,930 INFO L214 etLargeBlockEncoding]: Total number of compositions: 50 [2020-04-18 11:38:09,934 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 12 transitions, 32 flow [2020-04-18 11:38:09,944 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 16 states. [2020-04-18 11:38:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 11:38:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-18 11:38:09,953 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:09,954 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-18 11:38:09,955 INFO L427 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:09,961 INFO L82 PathProgramCache]: Analyzing trace with hash 7366572, now seen corresponding path program 1 times [2020-04-18 11:38:09,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:09,969 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [235270142] [2020-04-18 11:38:09,986 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:09,999 INFO L259 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-04-18 11:38:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2020-04-18 11:38:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-18 11:38:10,001 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:10,001 INFO L82 PathProgramCache]: Analyzing trace with hash 7366572, now seen corresponding path program 2 times [2020-04-18 11:38:10,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:10,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606663394] [2020-04-18 11:38:10,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:10,252 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 11:38:10,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606663394] [2020-04-18 11:38:10,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:38:10,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-04-18 11:38:10,256 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:10,257 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:10,258 INFO L259 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-04-18 11:38:10,258 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:10,274 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:38:10,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:38:10,281 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2020-04-18 11:38:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:10,285 INFO L93 Difference]: Finished difference Result 5 states and 4 transitions. [2020-04-18 11:38:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2020-04-18 11:38:10,286 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:10,286 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [235270142] [2020-04-18 11:38:10,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:10,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [1] total 1 [2020-04-18 11:38:10,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [235270142] [2020-04-18 11:38:10,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 11:38:10,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:38:10,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:38:10,298 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2020-04-18 11:38:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:10,330 INFO L93 Difference]: Finished difference Result 12 states and 18 transitions. [2020-04-18 11:38:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 11:38:10,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-18 11:38:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:10,346 INFO L225 Difference]: With dead ends: 12 [2020-04-18 11:38:10,346 INFO L226 Difference]: Without dead ends: 9 [2020-04-18 11:38:10,348 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:38:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-04-18 11:38:10,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-04-18 11:38:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-04-18 11:38:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 15 transitions. [2020-04-18 11:38:10,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 15 transitions. Word has length 4 [2020-04-18 11:38:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:10,386 INFO L479 AbstractCegarLoop]: Abstraction has 9 states and 15 transitions. [2020-04-18 11:38:10,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 11:38:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 15 transitions. [2020-04-18 11:38:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:38:10,390 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:10,390 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 11:38:10,390 INFO L427 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:10,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1511130461, now seen corresponding path program 1 times [2020-04-18 11:38:10,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:10,392 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1606650345] [2020-04-18 11:38:10,392 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:10,393 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 14 transitions. [2020-04-18 11:38:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-04-18 11:38:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:38:10,394 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:10,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1511130221, now seen corresponding path program 2 times [2020-04-18 11:38:10,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:10,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824885777] [2020-04-18 11:38:10,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:10,500 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 11:38:10,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824885777] [2020-04-18 11:38:10,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:38:10,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:38:10,501 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:10,504 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:10,507 INFO L259 McrAutomatonBuilder]: Finished intersection with 9 states and 10 transitions. [2020-04-18 11:38:10,511 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:10,519 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:10,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:38:10,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:38:10,519 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-04-18 11:38:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:10,528 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2020-04-18 11:38:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2020-04-18 11:38:10,528 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:10,529 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1606650345] [2020-04-18 11:38:10,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:10,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:10,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1606650345] [2020-04-18 11:38:10,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 11:38:10,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:38:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:38:10,531 INFO L87 Difference]: Start difference. First operand 9 states and 15 transitions. Second operand 3 states. [2020-04-18 11:38:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:10,541 INFO L93 Difference]: Finished difference Result 11 states and 19 transitions. [2020-04-18 11:38:10,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 11:38:10,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-04-18 11:38:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:10,542 INFO L225 Difference]: With dead ends: 11 [2020-04-18 11:38:10,542 INFO L226 Difference]: Without dead ends: 11 [2020-04-18 11:38:10,543 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:38:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-04-18 11:38:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-04-18 11:38:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-04-18 11:38:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 19 transitions. [2020-04-18 11:38:10,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 19 transitions. Word has length 6 [2020-04-18 11:38:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:10,547 INFO L479 AbstractCegarLoop]: Abstraction has 11 states and 19 transitions. [2020-04-18 11:38:10,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 11:38:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 19 transitions. [2020-04-18 11:38:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-18 11:38:10,548 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:10,548 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:10,549 INFO L427 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:10,549 INFO L82 PathProgramCache]: Analyzing trace with hash 399613212, now seen corresponding path program 1 times [2020-04-18 11:38:10,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:10,550 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [260584719] [2020-04-18 11:38:10,550 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:10,551 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 19 transitions. [2020-04-18 11:38:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-04-18 11:38:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-04-18 11:38:10,553 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash 399604152, now seen corresponding path program 2 times [2020-04-18 11:38:10,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:10,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440548540] [2020-04-18 11:38:10,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:10,627 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 11:38:10,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440548540] [2020-04-18 11:38:10,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231624891] [2020-04-18 11:38:10,628 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 11:38:10,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:10,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:10,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:10,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:10,702 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 11:38:10,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:10,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2020-04-18 11:38:10,704 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:10,704 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:10,707 INFO L259 McrAutomatonBuilder]: Finished intersection with 10 states and 11 transitions. [2020-04-18 11:38:10,707 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:10,728 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:10,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:38:10,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:38:10,729 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2020-04-18 11:38:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:10,753 INFO L93 Difference]: Finished difference Result 14 states and 19 transitions. [2020-04-18 11:38:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2020-04-18 11:38:10,753 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:10,754 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [260584719] [2020-04-18 11:38:10,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:10,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:10,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [260584719] [2020-04-18 11:38:10,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-18 11:38:10,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:10,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:38:10,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:38:10,755 INFO L87 Difference]: Start difference. First operand 11 states and 19 transitions. Second operand 5 states. [2020-04-18 11:38:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:10,786 INFO L93 Difference]: Finished difference Result 13 states and 23 transitions. [2020-04-18 11:38:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 11:38:10,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-04-18 11:38:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:10,787 INFO L225 Difference]: With dead ends: 13 [2020-04-18 11:38:10,787 INFO L226 Difference]: Without dead ends: 13 [2020-04-18 11:38:10,787 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:38:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-04-18 11:38:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-04-18 11:38:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-04-18 11:38:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 23 transitions. [2020-04-18 11:38:10,791 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 23 transitions. Word has length 7 [2020-04-18 11:38:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:10,791 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 23 transitions. [2020-04-18 11:38:10,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-18 11:38:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 23 transitions. [2020-04-18 11:38:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:38:10,792 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:10,792 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:10,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:10,997 INFO L427 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:10,998 INFO L82 PathProgramCache]: Analyzing trace with hash -496875069, now seen corresponding path program 3 times [2020-04-18 11:38:10,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:10,999 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1538807224] [2020-04-18 11:38:10,999 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:11,001 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 11:38:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 11:38:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:38:11,002 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash -497172429, now seen corresponding path program 4 times [2020-04-18 11:38:11,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:11,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287507010] [2020-04-18 11:38:11,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:11,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287507010] [2020-04-18 11:38:11,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474039607] [2020-04-18 11:38:11,094 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 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 11:38:11,145 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:11,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:11,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-18 11:38:11,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:11,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:11,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-04-18 11:38:11,163 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:11,163 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:11,165 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-04-18 11:38:11,165 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:11,181 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:11,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:38:11,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:38:11,182 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-04-18 11:38:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:11,206 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2020-04-18 11:38:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2020-04-18 11:38:11,206 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:11,207 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1538807224] [2020-04-18 11:38:11,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:11,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:38:11,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1538807224] [2020-04-18 11:38:11,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 11:38:11,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:11,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:38:11,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:38:11,209 INFO L87 Difference]: Start difference. First operand 13 states and 23 transitions. Second operand 6 states. [2020-04-18 11:38:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:11,227 INFO L93 Difference]: Finished difference Result 15 states and 27 transitions. [2020-04-18 11:38:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 11:38:11,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 11:38:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:11,228 INFO L225 Difference]: With dead ends: 15 [2020-04-18 11:38:11,229 INFO L226 Difference]: Without dead ends: 15 [2020-04-18 11:38:11,229 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 11:38:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-04-18 11:38:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-04-18 11:38:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-04-18 11:38:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 27 transitions. [2020-04-18 11:38:11,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 27 transitions. Word has length 8 [2020-04-18 11:38:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:11,233 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 27 transitions. [2020-04-18 11:38:11,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 11:38:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 27 transitions. [2020-04-18 11:38:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:38:11,234 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:11,234 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:11,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:11,442 INFO L427 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:11,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1776759292, now seen corresponding path program 5 times [2020-04-18 11:38:11,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:11,443 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1879650613] [2020-04-18 11:38:11,444 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:11,445 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 29 transitions. [2020-04-18 11:38:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-04-18 11:38:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:38:11,446 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:11,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1767524632, now seen corresponding path program 6 times [2020-04-18 11:38:11,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:11,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151459171] [2020-04-18 11:38:11,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:11,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151459171] [2020-04-18 11:38:11,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907393891] [2020-04-18 11:38:11,545 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 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 11:38:11,594 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:11,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:11,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:11,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 11:38:11,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:11,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2020-04-18 11:38:11,605 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:11,605 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:11,607 INFO L259 McrAutomatonBuilder]: Finished intersection with 12 states and 13 transitions. [2020-04-18 11:38:11,607 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:11,630 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:11,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:38:11,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:38:11,631 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 7 states. [2020-04-18 11:38:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:11,684 INFO L93 Difference]: Finished difference Result 20 states and 29 transitions. [2020-04-18 11:38:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2020-04-18 11:38:11,685 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:11,685 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1879650613] [2020-04-18 11:38:11,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:11,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:11,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1879650613] [2020-04-18 11:38:11,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 11:38:11,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:11,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:38:11,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:38:11,687 INFO L87 Difference]: Start difference. First operand 15 states and 27 transitions. Second operand 7 states. [2020-04-18 11:38:11,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:11,737 INFO L93 Difference]: Finished difference Result 17 states and 31 transitions. [2020-04-18 11:38:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 11:38:11,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-04-18 11:38:11,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:11,739 INFO L225 Difference]: With dead ends: 17 [2020-04-18 11:38:11,739 INFO L226 Difference]: Without dead ends: 17 [2020-04-18 11:38:11,739 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:38:11,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-04-18 11:38:11,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-04-18 11:38:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-04-18 11:38:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 31 transitions. [2020-04-18 11:38:11,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 31 transitions. Word has length 9 [2020-04-18 11:38:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:11,746 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 31 transitions. [2020-04-18 11:38:11,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 11:38:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 31 transitions. [2020-04-18 11:38:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:38:11,748 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:11,748 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:11,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:11,951 INFO L427 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:11,952 INFO L82 PathProgramCache]: Analyzing trace with hash -755019549, now seen corresponding path program 7 times [2020-04-18 11:38:11,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:11,952 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1649342931] [2020-04-18 11:38:11,952 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:11,953 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 34 transitions. [2020-04-18 11:38:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-04-18 11:38:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:38:11,954 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:11,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1041310509, now seen corresponding path program 8 times [2020-04-18 11:38:11,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:11,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763634742] [2020-04-18 11:38:11,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:12,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763634742] [2020-04-18 11:38:12,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870511643] [2020-04-18 11:38:12,006 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:38:12,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:12,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:12,059 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:12,060 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 11:38:12,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:12,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2020-04-18 11:38:12,074 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:12,075 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:12,076 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 14 transitions. [2020-04-18 11:38:12,076 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:12,114 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 11:38:12,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:38:12,115 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 8 states. [2020-04-18 11:38:12,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:12,205 INFO L93 Difference]: Finished difference Result 23 states and 34 transitions. [2020-04-18 11:38:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2020-04-18 11:38:12,206 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:12,206 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1649342931] [2020-04-18 11:38:12,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:12,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:12,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1649342931] [2020-04-18 11:38:12,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 11:38:12,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:12,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 11:38:12,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:38:12,209 INFO L87 Difference]: Start difference. First operand 17 states and 31 transitions. Second operand 8 states. [2020-04-18 11:38:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:12,268 INFO L93 Difference]: Finished difference Result 19 states and 35 transitions. [2020-04-18 11:38:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 11:38:12,268 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-04-18 11:38:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:12,269 INFO L225 Difference]: With dead ends: 19 [2020-04-18 11:38:12,269 INFO L226 Difference]: Without dead ends: 19 [2020-04-18 11:38:12,270 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:38:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-04-18 11:38:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-04-18 11:38:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-04-18 11:38:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2020-04-18 11:38:12,274 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2020-04-18 11:38:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:12,274 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2020-04-18 11:38:12,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 11:38:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2020-04-18 11:38:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:38:12,277 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:12,277 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:12,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:12,478 INFO L427 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1930752292, now seen corresponding path program 9 times [2020-04-18 11:38:12,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:12,479 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1952449491] [2020-04-18 11:38:12,480 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:12,481 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 39 transitions. [2020-04-18 11:38:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-04-18 11:38:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:38:12,482 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2079113336, now seen corresponding path program 10 times [2020-04-18 11:38:12,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:12,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565532059] [2020-04-18 11:38:12,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:12,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565532059] [2020-04-18 11:38:12,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184236255] [2020-04-18 11:38:12,565 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:12,616 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:12,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:12,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:38:12,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:12,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:12,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-18 11:38:12,632 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:12,633 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:12,634 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 15 transitions. [2020-04-18 11:38:12,635 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:12,670 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:12,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:38:12,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 11:38:12,670 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 9 states. [2020-04-18 11:38:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:12,721 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2020-04-18 11:38:12,721 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 39 transitions. [2020-04-18 11:38:12,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:12,722 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1952449491] [2020-04-18 11:38:12,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:12,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:38:12,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1952449491] [2020-04-18 11:38:12,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-18 11:38:12,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:12,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:38:12,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-04-18 11:38:12,724 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand 9 states. [2020-04-18 11:38:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:12,761 INFO L93 Difference]: Finished difference Result 21 states and 39 transitions. [2020-04-18 11:38:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 11:38:12,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-04-18 11:38:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:12,762 INFO L225 Difference]: With dead ends: 21 [2020-04-18 11:38:12,762 INFO L226 Difference]: Without dead ends: 21 [2020-04-18 11:38:12,763 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 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 11:38:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-04-18 11:38:12,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-04-18 11:38:12,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-04-18 11:38:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 39 transitions. [2020-04-18 11:38:12,767 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 39 transitions. Word has length 11 [2020-04-18 11:38:12,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:12,767 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 39 transitions. [2020-04-18 11:38:12,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-18 11:38:12,767 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 39 transitions. [2020-04-18 11:38:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:38:12,768 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:12,768 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:12,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:12,972 INFO L427 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash 276238339, now seen corresponding path program 11 times [2020-04-18 11:38:12,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:12,972 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1092657345] [2020-04-18 11:38:12,973 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:12,974 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 44 transitions. [2020-04-18 11:38:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-04-18 11:38:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:38:12,975 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:12,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:12,975 INFO L82 PathProgramCache]: Analyzing trace with hash 28004723, now seen corresponding path program 12 times [2020-04-18 11:38:12,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:12,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518142587] [2020-04-18 11:38:12,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:13,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518142587] [2020-04-18 11:38:13,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401668874] [2020-04-18 11:38:13,069 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:13,124 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:13,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:13,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:13,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-04-18 11:38:13,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:13,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2020-04-18 11:38:13,134 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:13,135 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:13,136 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 16 transitions. [2020-04-18 11:38:13,136 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:13,180 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:13,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:38:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-04-18 11:38:13,181 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 10 states. [2020-04-18 11:38:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:13,296 INFO L93 Difference]: Finished difference Result 29 states and 44 transitions. [2020-04-18 11:38:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 44 transitions. [2020-04-18 11:38:13,297 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:13,297 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1092657345] [2020-04-18 11:38:13,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:13,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:13,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1092657345] [2020-04-18 11:38:13,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 11:38:13,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:38:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:38:13,299 INFO L87 Difference]: Start difference. First operand 21 states and 39 transitions. Second operand 10 states. [2020-04-18 11:38:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:13,336 INFO L93 Difference]: Finished difference Result 23 states and 43 transitions. [2020-04-18 11:38:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-18 11:38:13,337 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-04-18 11:38:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:13,337 INFO L225 Difference]: With dead ends: 23 [2020-04-18 11:38:13,337 INFO L226 Difference]: Without dead ends: 23 [2020-04-18 11:38:13,338 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:38:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-04-18 11:38:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-04-18 11:38:13,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-04-18 11:38:13,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 43 transitions. [2020-04-18 11:38:13,341 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 43 transitions. Word has length 12 [2020-04-18 11:38:13,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:13,341 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 43 transitions. [2020-04-18 11:38:13,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 11:38:13,342 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 43 transitions. [2020-04-18 11:38:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:38:13,342 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:13,342 INFO L425 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:13,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:13,546 INFO L427 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:13,546 INFO L82 PathProgramCache]: Analyzing trace with hash -26528836, now seen corresponding path program 13 times [2020-04-18 11:38:13,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:13,546 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [374288836] [2020-04-18 11:38:13,547 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:13,548 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 49 transitions. [2020-04-18 11:38:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-04-18 11:38:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:38:13,549 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:13,550 INFO L82 PathProgramCache]: Analyzing trace with hash 868147160, now seen corresponding path program 14 times [2020-04-18 11:38:13,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:13,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861601672] [2020-04-18 11:38:13,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:13,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861601672] [2020-04-18 11:38:13,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706793781] [2020-04-18 11:38:13,642 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 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 11:38:13,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:13,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:13,704 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:13,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-04-18 11:38:13,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:13,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 11 [2020-04-18 11:38:13,720 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:13,721 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:13,725 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 17 transitions. [2020-04-18 11:38:13,725 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:13,795 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:13,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:38:13,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:38:13,796 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 11 states. [2020-04-18 11:38:13,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:13,925 INFO L93 Difference]: Finished difference Result 32 states and 49 transitions. [2020-04-18 11:38:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2020-04-18 11:38:13,925 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:13,926 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [374288836] [2020-04-18 11:38:13,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:13,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:13,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [374288836] [2020-04-18 11:38:13,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 11:38:13,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:13,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:38:13,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:38:13,927 INFO L87 Difference]: Start difference. First operand 23 states and 43 transitions. Second operand 11 states. [2020-04-18 11:38:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:13,978 INFO L93 Difference]: Finished difference Result 25 states and 47 transitions. [2020-04-18 11:38:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 11:38:13,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-04-18 11:38:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:13,980 INFO L225 Difference]: With dead ends: 25 [2020-04-18 11:38:13,980 INFO L226 Difference]: Without dead ends: 25 [2020-04-18 11:38:13,980 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:38:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-04-18 11:38:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-04-18 11:38:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-04-18 11:38:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 47 transitions. [2020-04-18 11:38:13,988 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 47 transitions. Word has length 13 [2020-04-18 11:38:13,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:13,989 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 47 transitions. [2020-04-18 11:38:13,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 11:38:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 47 transitions. [2020-04-18 11:38:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:38:13,990 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:13,990 INFO L425 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:14,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:14,195 INFO L427 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:14,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:14,196 INFO L82 PathProgramCache]: Analyzing trace with hash -822376669, now seen corresponding path program 15 times [2020-04-18 11:38:14,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:14,196 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1255624455] [2020-04-18 11:38:14,197 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:14,198 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 54 transitions. [2020-04-18 11:38:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 11:38:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:38:14,199 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:14,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1142758931, now seen corresponding path program 16 times [2020-04-18 11:38:14,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:14,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583012568] [2020-04-18 11:38:14,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:14,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583012568] [2020-04-18 11:38:14,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360876974] [2020-04-18 11:38:14,358 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 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 11:38:14,432 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:14,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:14,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:38:14,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:14,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:14,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-18 11:38:14,458 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:14,459 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:14,464 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 18 transitions. [2020-04-18 11:38:14,464 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:14,536 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:38:14,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:38:14,537 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 12 states. [2020-04-18 11:38:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:14,613 INFO L93 Difference]: Finished difference Result 35 states and 54 transitions. [2020-04-18 11:38:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 54 transitions. [2020-04-18 11:38:14,614 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:14,614 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1255624455] [2020-04-18 11:38:14,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:14,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-04-18 11:38:14,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1255624455] [2020-04-18 11:38:14,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:38:14,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:14,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:38:14,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:38:14,616 INFO L87 Difference]: Start difference. First operand 25 states and 47 transitions. Second operand 12 states. [2020-04-18 11:38:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:14,642 INFO L93 Difference]: Finished difference Result 27 states and 51 transitions. [2020-04-18 11:38:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 11:38:14,643 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-04-18 11:38:14,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:14,644 INFO L225 Difference]: With dead ends: 27 [2020-04-18 11:38:14,644 INFO L226 Difference]: Without dead ends: 27 [2020-04-18 11:38:14,644 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 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 11:38:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-04-18 11:38:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-04-18 11:38:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-04-18 11:38:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 51 transitions. [2020-04-18 11:38:14,650 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 51 transitions. Word has length 14 [2020-04-18 11:38:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:14,651 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 51 transitions. [2020-04-18 11:38:14,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:38:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 51 transitions. [2020-04-18 11:38:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:38:14,652 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:14,652 INFO L425 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:14,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:14,858 INFO L427 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:14,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:14,858 INFO L82 PathProgramCache]: Analyzing trace with hash 276144284, now seen corresponding path program 17 times [2020-04-18 11:38:14,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:14,858 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2003228925] [2020-04-18 11:38:14,859 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:14,860 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 59 transitions. [2020-04-18 11:38:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-04-18 11:38:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 11:38:14,861 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:14,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1065789240, now seen corresponding path program 18 times [2020-04-18 11:38:14,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:14,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273151299] [2020-04-18 11:38:14,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:14,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273151299] [2020-04-18 11:38:14,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200112792] [2020-04-18 11:38:14,964 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:15,009 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:15,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:15,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:15,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-04-18 11:38:15,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:15,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 13 [2020-04-18 11:38:15,045 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:15,046 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:15,048 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 19 transitions. [2020-04-18 11:38:15,048 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:15,142 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:38:15,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:38:15,143 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 13 states. [2020-04-18 11:38:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:15,335 INFO L93 Difference]: Finished difference Result 38 states and 59 transitions. [2020-04-18 11:38:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 59 transitions. [2020-04-18 11:38:15,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:15,336 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2003228925] [2020-04-18 11:38:15,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:15,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:15,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2003228925] [2020-04-18 11:38:15,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 11:38:15,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:15,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:38:15,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-04-18 11:38:15,337 INFO L87 Difference]: Start difference. First operand 27 states and 51 transitions. Second operand 13 states. [2020-04-18 11:38:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:15,430 INFO L93 Difference]: Finished difference Result 29 states and 55 transitions. [2020-04-18 11:38:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 11:38:15,431 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-04-18 11:38:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:15,432 INFO L225 Difference]: With dead ends: 29 [2020-04-18 11:38:15,432 INFO L226 Difference]: Without dead ends: 29 [2020-04-18 11:38:15,433 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-04-18 11:38:15,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-04-18 11:38:15,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-04-18 11:38:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-04-18 11:38:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 55 transitions. [2020-04-18 11:38:15,437 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 55 transitions. Word has length 15 [2020-04-18 11:38:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:15,437 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 55 transitions. [2020-04-18 11:38:15,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 11:38:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 55 transitions. [2020-04-18 11:38:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:38:15,441 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:15,441 INFO L425 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:15,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:15,642 INFO L427 AbstractCegarLoop]: === Iteration 12 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:15,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:15,642 INFO L82 PathProgramCache]: Analyzing trace with hash -29444541, now seen corresponding path program 19 times [2020-04-18 11:38:15,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:15,643 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [422287625] [2020-04-18 11:38:15,643 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:15,644 INFO L259 McrAutomatonBuilder]: Finished intersection with 41 states and 64 transitions. [2020-04-18 11:38:15,645 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-04-18 11:38:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 11:38:15,645 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1320271181, now seen corresponding path program 20 times [2020-04-18 11:38:15,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:15,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627178056] [2020-04-18 11:38:15,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:15,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627178056] [2020-04-18 11:38:15,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105308591] [2020-04-18 11:38:15,771 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 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 11:38:15,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:15,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:15,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:15,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-04-18 11:38:15,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:15,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2020-04-18 11:38:15,823 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:15,824 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:15,825 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 20 transitions. [2020-04-18 11:38:15,826 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:15,926 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:38:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:38:15,927 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 14 states. [2020-04-18 11:38:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:16,162 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2020-04-18 11:38:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 64 transitions. [2020-04-18 11:38:16,163 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:16,163 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [422287625] [2020-04-18 11:38:16,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:16,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:16,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [422287625] [2020-04-18 11:38:16,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 11:38:16,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:38:16,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:38:16,165 INFO L87 Difference]: Start difference. First operand 29 states and 55 transitions. Second operand 14 states. [2020-04-18 11:38:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:16,247 INFO L93 Difference]: Finished difference Result 31 states and 59 transitions. [2020-04-18 11:38:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-18 11:38:16,247 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-04-18 11:38:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:16,248 INFO L225 Difference]: With dead ends: 31 [2020-04-18 11:38:16,248 INFO L226 Difference]: Without dead ends: 31 [2020-04-18 11:38:16,248 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:38:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-04-18 11:38:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-04-18 11:38:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-04-18 11:38:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 59 transitions. [2020-04-18 11:38:16,251 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 59 transitions. Word has length 16 [2020-04-18 11:38:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:16,252 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 59 transitions. [2020-04-18 11:38:16,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 11:38:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 59 transitions. [2020-04-18 11:38:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 11:38:16,252 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:16,252 INFO L425 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:16,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:16,453 INFO L427 AbstractCegarLoop]: === Iteration 13 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash -912763524, now seen corresponding path program 21 times [2020-04-18 11:38:16,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:16,454 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1637056182] [2020-04-18 11:38:16,455 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:16,455 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 69 transitions. [2020-04-18 11:38:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:38:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 11:38:16,456 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2021267096, now seen corresponding path program 22 times [2020-04-18 11:38:16,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:16,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583259183] [2020-04-18 11:38:16,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:16,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583259183] [2020-04-18 11:38:16,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035060241] [2020-04-18 11:38:16,568 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 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 11:38:16,616 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:16,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:16,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 11:38:16,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:16,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:16,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-18 11:38:16,647 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:16,648 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:16,649 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 21 transitions. [2020-04-18 11:38:16,650 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:16,770 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:38:16,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:38:16,770 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 15 states. [2020-04-18 11:38:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:16,881 INFO L93 Difference]: Finished difference Result 44 states and 69 transitions. [2020-04-18 11:38:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 69 transitions. [2020-04-18 11:38:16,881 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:16,882 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1637056182] [2020-04-18 11:38:16,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:16,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-04-18 11:38:16,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1637056182] [2020-04-18 11:38:16,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 11:38:16,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:16,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:38:16,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:38:16,884 INFO L87 Difference]: Start difference. First operand 31 states and 59 transitions. Second operand 15 states. [2020-04-18 11:38:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:16,929 INFO L93 Difference]: Finished difference Result 33 states and 63 transitions. [2020-04-18 11:38:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-18 11:38:16,929 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-04-18 11:38:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:16,930 INFO L225 Difference]: With dead ends: 33 [2020-04-18 11:38:16,930 INFO L226 Difference]: Without dead ends: 33 [2020-04-18 11:38:16,931 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:38:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-04-18 11:38:16,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-04-18 11:38:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-04-18 11:38:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 63 transitions. [2020-04-18 11:38:16,934 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 63 transitions. Word has length 17 [2020-04-18 11:38:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:16,934 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 63 transitions. [2020-04-18 11:38:16,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 11:38:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 63 transitions. [2020-04-18 11:38:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:38:16,935 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:16,935 INFO L425 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:17,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:17,139 INFO L427 AbstractCegarLoop]: === Iteration 14 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:17,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1769119075, now seen corresponding path program 23 times [2020-04-18 11:38:17,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:17,140 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1659212227] [2020-04-18 11:38:17,140 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:17,141 INFO L259 McrAutomatonBuilder]: Finished intersection with 47 states and 74 transitions. [2020-04-18 11:38:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-04-18 11:38:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 11:38:17,142 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:17,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1765228717, now seen corresponding path program 24 times [2020-04-18 11:38:17,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:17,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911468762] [2020-04-18 11:38:17,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:17,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911468762] [2020-04-18 11:38:17,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060612832] [2020-04-18 11:38:17,265 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:17,308 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:17,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:17,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:17,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-04-18 11:38:17,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:17,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [14] total 16 [2020-04-18 11:38:17,320 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:17,321 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:17,323 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 22 transitions. [2020-04-18 11:38:17,323 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:17,426 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:17,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:38:17,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:38:17,426 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 16 states. [2020-04-18 11:38:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:17,680 INFO L93 Difference]: Finished difference Result 47 states and 74 transitions. [2020-04-18 11:38:17,681 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 74 transitions. [2020-04-18 11:38:17,681 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:17,681 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1659212227] [2020-04-18 11:38:17,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:17,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:17,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1659212227] [2020-04-18 11:38:17,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:38:17,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:17,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:38:17,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-04-18 11:38:17,683 INFO L87 Difference]: Start difference. First operand 33 states and 63 transitions. Second operand 16 states. [2020-04-18 11:38:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:17,755 INFO L93 Difference]: Finished difference Result 35 states and 67 transitions. [2020-04-18 11:38:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 11:38:17,756 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-04-18 11:38:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:17,756 INFO L225 Difference]: With dead ends: 35 [2020-04-18 11:38:17,756 INFO L226 Difference]: Without dead ends: 35 [2020-04-18 11:38:17,757 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-04-18 11:38:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-04-18 11:38:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-04-18 11:38:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-04-18 11:38:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 67 transitions. [2020-04-18 11:38:17,760 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 67 transitions. Word has length 18 [2020-04-18 11:38:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:17,761 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 67 transitions. [2020-04-18 11:38:17,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:38:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 67 transitions. [2020-04-18 11:38:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 11:38:17,761 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:17,762 INFO L425 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:17,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:17,965 INFO L427 AbstractCegarLoop]: === Iteration 15 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash -991866276, now seen corresponding path program 25 times [2020-04-18 11:38:17,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:17,966 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1638866553] [2020-04-18 11:38:17,967 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:17,968 INFO L259 McrAutomatonBuilder]: Finished intersection with 50 states and 79 transitions. [2020-04-18 11:38:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-04-18 11:38:17,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 11:38:17,969 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:17,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1112485368, now seen corresponding path program 26 times [2020-04-18 11:38:17,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:17,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778589261] [2020-04-18 11:38:17,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:18,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778589261] [2020-04-18 11:38:18,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329164389] [2020-04-18 11:38:18,102 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 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 11:38:18,144 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:18,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:18,145 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:18,146 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-04-18 11:38:18,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:18,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [15] total 17 [2020-04-18 11:38:18,167 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:18,168 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:18,170 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 23 transitions. [2020-04-18 11:38:18,170 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:18,308 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:18,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:38:18,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:38:18,309 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 17 states. [2020-04-18 11:38:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:18,613 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2020-04-18 11:38:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 79 transitions. [2020-04-18 11:38:18,613 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:18,614 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1638866553] [2020-04-18 11:38:18,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:18,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:18,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1638866553] [2020-04-18 11:38:18,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 11:38:18,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:38:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:38:18,617 INFO L87 Difference]: Start difference. First operand 35 states and 67 transitions. Second operand 17 states. [2020-04-18 11:38:18,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:18,699 INFO L93 Difference]: Finished difference Result 37 states and 71 transitions. [2020-04-18 11:38:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:38:18,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-04-18 11:38:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:18,700 INFO L225 Difference]: With dead ends: 37 [2020-04-18 11:38:18,700 INFO L226 Difference]: Without dead ends: 37 [2020-04-18 11:38:18,701 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:38:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-04-18 11:38:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-04-18 11:38:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-04-18 11:38:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 71 transitions. [2020-04-18 11:38:18,707 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 71 transitions. Word has length 19 [2020-04-18 11:38:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:18,707 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 71 transitions. [2020-04-18 11:38:18,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 11:38:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 71 transitions. [2020-04-18 11:38:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-18 11:38:18,708 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:18,708 INFO L425 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:18,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:18,911 INFO L427 AbstractCegarLoop]: === Iteration 16 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash -683066237, now seen corresponding path program 27 times [2020-04-18 11:38:18,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:18,913 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1378172285] [2020-04-18 11:38:18,914 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:18,915 INFO L259 McrAutomatonBuilder]: Finished intersection with 53 states and 84 transitions. [2020-04-18 11:38:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-04-18 11:38:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-18 11:38:18,915 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:18,916 INFO L82 PathProgramCache]: Analyzing trace with hash 127308787, now seen corresponding path program 28 times [2020-04-18 11:38:18,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:18,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613671542] [2020-04-18 11:38:18,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:19,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613671542] [2020-04-18 11:38:19,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419307393] [2020-04-18 11:38:19,081 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 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 11:38:19,140 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:19,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:19,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 11:38:19,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:19,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:19,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-18 11:38:19,157 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:19,158 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:19,160 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 24 transitions. [2020-04-18 11:38:19,160 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:19,288 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:19,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:38:19,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 11:38:19,289 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 18 states. [2020-04-18 11:38:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:19,450 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2020-04-18 11:38:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 84 transitions. [2020-04-18 11:38:19,451 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:19,451 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1378172285] [2020-04-18 11:38:19,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:19,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-04-18 11:38:19,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1378172285] [2020-04-18 11:38:19,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 11:38:19,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:19,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:38:19,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-04-18 11:38:19,452 INFO L87 Difference]: Start difference. First operand 37 states and 71 transitions. Second operand 18 states. [2020-04-18 11:38:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:19,500 INFO L93 Difference]: Finished difference Result 39 states and 75 transitions. [2020-04-18 11:38:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:38:19,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-04-18 11:38:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:19,501 INFO L225 Difference]: With dead ends: 39 [2020-04-18 11:38:19,501 INFO L226 Difference]: Without dead ends: 39 [2020-04-18 11:38:19,502 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 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 11:38:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-04-18 11:38:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-04-18 11:38:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-04-18 11:38:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2020-04-18 11:38:19,505 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 20 [2020-04-18 11:38:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:19,505 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2020-04-18 11:38:19,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 11:38:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2020-04-18 11:38:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 11:38:19,506 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:19,506 INFO L425 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:19,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:19,714 INFO L427 AbstractCegarLoop]: === Iteration 17 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 299800380, now seen corresponding path program 29 times [2020-04-18 11:38:19,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:19,715 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [203139293] [2020-04-18 11:38:19,716 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:19,717 INFO L259 McrAutomatonBuilder]: Finished intersection with 56 states and 89 transitions. [2020-04-18 11:38:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-04-18 11:38:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 11:38:19,718 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:19,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:19,719 INFO L82 PathProgramCache]: Analyzing trace with hash -348394152, now seen corresponding path program 30 times [2020-04-18 11:38:19,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:19,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94280020] [2020-04-18 11:38:19,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:19,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94280020] [2020-04-18 11:38:19,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887367366] [2020-04-18 11:38:19,937 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 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 11:38:20,000 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:20,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:20,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:20,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-04-18 11:38:20,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:20,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [17] total 19 [2020-04-18 11:38:20,023 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:20,025 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:20,027 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 25 transitions. [2020-04-18 11:38:20,028 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:20,258 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:20,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:38:20,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-04-18 11:38:20,258 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 19 states. [2020-04-18 11:38:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:20,604 INFO L93 Difference]: Finished difference Result 56 states and 89 transitions. [2020-04-18 11:38:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 89 transitions. [2020-04-18 11:38:20,604 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:20,604 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [203139293] [2020-04-18 11:38:20,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:20,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:20,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [203139293] [2020-04-18 11:38:20,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 11:38:20,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:38:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 11:38:20,607 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand 19 states. [2020-04-18 11:38:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:20,709 INFO L93 Difference]: Finished difference Result 41 states and 79 transitions. [2020-04-18 11:38:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-18 11:38:20,710 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-04-18 11:38:20,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:20,710 INFO L225 Difference]: With dead ends: 41 [2020-04-18 11:38:20,710 INFO L226 Difference]: Without dead ends: 41 [2020-04-18 11:38:20,711 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 11:38:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-04-18 11:38:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-04-18 11:38:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-04-18 11:38:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2020-04-18 11:38:20,714 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 21 [2020-04-18 11:38:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:20,714 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2020-04-18 11:38:20,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 11:38:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2020-04-18 11:38:20,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 11:38:20,715 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:20,715 INFO L425 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:20,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:20,919 INFO L427 AbstractCegarLoop]: === Iteration 18 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash 703894435, now seen corresponding path program 31 times [2020-04-18 11:38:20,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:20,920 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1361786770] [2020-04-18 11:38:20,921 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:20,921 INFO L259 McrAutomatonBuilder]: Finished intersection with 59 states and 94 transitions. [2020-04-18 11:38:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-04-18 11:38:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 11:38:20,922 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:20,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2084683923, now seen corresponding path program 32 times [2020-04-18 11:38:20,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:20,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449592090] [2020-04-18 11:38:20,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:21,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449592090] [2020-04-18 11:38:21,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743900192] [2020-04-18 11:38:21,105 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 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 11:38:21,152 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:21,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:21,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:21,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-04-18 11:38:21,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:21,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [18] total 20 [2020-04-18 11:38:21,171 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:21,172 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:21,174 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 26 transitions. [2020-04-18 11:38:21,174 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:21,354 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:38:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:38:21,355 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 20 states. [2020-04-18 11:38:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:21,741 INFO L93 Difference]: Finished difference Result 59 states and 94 transitions. [2020-04-18 11:38:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 94 transitions. [2020-04-18 11:38:21,742 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:21,742 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1361786770] [2020-04-18 11:38:21,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:21,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:21,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1361786770] [2020-04-18 11:38:21,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 11:38:21,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:38:21,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 11:38:21,744 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand 20 states. [2020-04-18 11:38:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:21,830 INFO L93 Difference]: Finished difference Result 43 states and 83 transitions. [2020-04-18 11:38:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 11:38:21,831 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-04-18 11:38:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:21,831 INFO L225 Difference]: With dead ends: 43 [2020-04-18 11:38:21,831 INFO L226 Difference]: Without dead ends: 43 [2020-04-18 11:38:21,832 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 11:38:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-18 11:38:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-04-18 11:38:21,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-04-18 11:38:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2020-04-18 11:38:21,835 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 22 [2020-04-18 11:38:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:21,835 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2020-04-18 11:38:21,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 11:38:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2020-04-18 11:38:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-18 11:38:21,851 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:21,852 INFO L425 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:22,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:22,056 INFO L427 AbstractCegarLoop]: === Iteration 19 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:22,057 INFO L82 PathProgramCache]: Analyzing trace with hash 345908252, now seen corresponding path program 33 times [2020-04-18 11:38:22,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:22,057 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1824712243] [2020-04-18 11:38:22,058 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:22,058 INFO L259 McrAutomatonBuilder]: Finished intersection with 62 states and 99 transitions. [2020-04-18 11:38:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-04-18 11:38:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-18 11:38:22,059 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:22,060 INFO L82 PathProgramCache]: Analyzing trace with hash 200692920, now seen corresponding path program 34 times [2020-04-18 11:38:22,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:22,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770178769] [2020-04-18 11:38:22,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:22,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770178769] [2020-04-18 11:38:22,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457059241] [2020-04-18 11:38:22,274 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:38:22,331 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:22,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:22,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-18 11:38:22,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:22,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:22,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-18 11:38:22,348 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:22,349 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:22,351 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 27 transitions. [2020-04-18 11:38:22,351 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:22,565 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:22,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 11:38:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:38:22,566 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 21 states. [2020-04-18 11:38:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:22,765 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2020-04-18 11:38:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 99 transitions. [2020-04-18 11:38:22,766 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:22,766 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1824712243] [2020-04-18 11:38:22,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:22,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-04-18 11:38:22,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1824712243] [2020-04-18 11:38:22,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-18 11:38:22,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:22,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-18 11:38:22,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:38:22,768 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand 21 states. [2020-04-18 11:38:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:22,810 INFO L93 Difference]: Finished difference Result 45 states and 87 transitions. [2020-04-18 11:38:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 11:38:22,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-04-18 11:38:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:22,811 INFO L225 Difference]: With dead ends: 45 [2020-04-18 11:38:22,812 INFO L226 Difference]: Without dead ends: 45 [2020-04-18 11:38:22,812 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:38:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-04-18 11:38:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-04-18 11:38:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-18 11:38:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2020-04-18 11:38:22,817 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 23 [2020-04-18 11:38:22,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:22,817 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2020-04-18 11:38:22,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-18 11:38:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2020-04-18 11:38:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-18 11:38:22,818 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:22,818 INFO L425 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:23,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:23,022 INFO L427 AbstractCegarLoop]: === Iteration 20 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:23,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2133238467, now seen corresponding path program 35 times [2020-04-18 11:38:23,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:23,023 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [792304274] [2020-04-18 11:38:23,024 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:23,025 INFO L259 McrAutomatonBuilder]: Finished intersection with 65 states and 104 transitions. [2020-04-18 11:38:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-04-18 11:38:23,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-18 11:38:23,026 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:23,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1926513971, now seen corresponding path program 36 times [2020-04-18 11:38:23,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:23,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085030759] [2020-04-18 11:38:23,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:23,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085030759] [2020-04-18 11:38:23,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342949990] [2020-04-18 11:38:23,239 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:23,281 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:23,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:23,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:23,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-04-18 11:38:23,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:23,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [20] total 22 [2020-04-18 11:38:23,304 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:23,305 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:23,307 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 28 transitions. [2020-04-18 11:38:23,307 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:23,495 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:23,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 11:38:23,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:38:23,496 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 22 states. [2020-04-18 11:38:23,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:23,950 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2020-04-18 11:38:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 104 transitions. [2020-04-18 11:38:23,951 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:23,951 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [792304274] [2020-04-18 11:38:23,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:23,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:23,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [792304274] [2020-04-18 11:38:23,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 11:38:23,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 11:38:23,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 11:38:23,953 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand 22 states. [2020-04-18 11:38:24,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:24,088 INFO L93 Difference]: Finished difference Result 47 states and 91 transitions. [2020-04-18 11:38:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-18 11:38:24,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-04-18 11:38:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:24,090 INFO L225 Difference]: With dead ends: 47 [2020-04-18 11:38:24,090 INFO L226 Difference]: Without dead ends: 47 [2020-04-18 11:38:24,091 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 11:38:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-04-18 11:38:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-04-18 11:38:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-04-18 11:38:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 91 transitions. [2020-04-18 11:38:24,095 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 91 transitions. Word has length 24 [2020-04-18 11:38:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:24,095 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 91 transitions. [2020-04-18 11:38:24,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 11:38:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 91 transitions. [2020-04-18 11:38:24,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 11:38:24,095 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:24,096 INFO L425 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:24,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:24,298 INFO L427 AbstractCegarLoop]: === Iteration 21 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:24,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1705900284, now seen corresponding path program 37 times [2020-04-18 11:38:24,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:24,299 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1932460595] [2020-04-18 11:38:24,300 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:24,301 INFO L259 McrAutomatonBuilder]: Finished intersection with 68 states and 109 transitions. [2020-04-18 11:38:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-04-18 11:38:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-18 11:38:24,302 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:24,303 INFO L82 PathProgramCache]: Analyzing trace with hash -407608296, now seen corresponding path program 38 times [2020-04-18 11:38:24,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:24,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059624577] [2020-04-18 11:38:24,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:24,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059624577] [2020-04-18 11:38:24,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529051052] [2020-04-18 11:38:24,537 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:24,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:24,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:24,582 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:24,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-04-18 11:38:24,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:24,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [21] total 23 [2020-04-18 11:38:24,624 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:24,626 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:24,628 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 29 transitions. [2020-04-18 11:38:24,628 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:24,860 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:24,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 11:38:24,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-04-18 11:38:24,861 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 23 states. [2020-04-18 11:38:25,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:25,391 INFO L93 Difference]: Finished difference Result 68 states and 109 transitions. [2020-04-18 11:38:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 109 transitions. [2020-04-18 11:38:25,392 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:25,392 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1932460595] [2020-04-18 11:38:25,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:25,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:25,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1932460595] [2020-04-18 11:38:25,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 11:38:25,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:25,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 11:38:25,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 11:38:25,394 INFO L87 Difference]: Start difference. First operand 47 states and 91 transitions. Second operand 23 states. [2020-04-18 11:38:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:25,545 INFO L93 Difference]: Finished difference Result 49 states and 95 transitions. [2020-04-18 11:38:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 11:38:25,546 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-04-18 11:38:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:25,546 INFO L225 Difference]: With dead ends: 49 [2020-04-18 11:38:25,546 INFO L226 Difference]: Without dead ends: 49 [2020-04-18 11:38:25,548 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 11:38:25,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-04-18 11:38:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-04-18 11:38:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-18 11:38:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 95 transitions. [2020-04-18 11:38:25,551 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 95 transitions. Word has length 25 [2020-04-18 11:38:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:25,551 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 95 transitions. [2020-04-18 11:38:25,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 11:38:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 95 transitions. [2020-04-18 11:38:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 11:38:25,552 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:25,552 INFO L425 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:25,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:25,755 INFO L427 AbstractCegarLoop]: === Iteration 22 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:25,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1343318499, now seen corresponding path program 39 times [2020-04-18 11:38:25,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:25,756 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [665958073] [2020-04-18 11:38:25,757 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:25,758 INFO L259 McrAutomatonBuilder]: Finished intersection with 71 states and 114 transitions. [2020-04-18 11:38:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-04-18 11:38:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-18 11:38:25,759 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:25,760 INFO L82 PathProgramCache]: Analyzing trace with hash 249045459, now seen corresponding path program 40 times [2020-04-18 11:38:25,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:25,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278077666] [2020-04-18 11:38:25,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:26,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278077666] [2020-04-18 11:38:26,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870860142] [2020-04-18 11:38:26,010 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:38:26,071 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:26,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:26,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-18 11:38:26,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:26,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:26,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-18 11:38:26,088 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:26,089 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:26,092 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 30 transitions. [2020-04-18 11:38:26,092 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:26,297 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:38:26,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:38:26,297 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 24 states. [2020-04-18 11:38:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:26,564 INFO L93 Difference]: Finished difference Result 71 states and 114 transitions. [2020-04-18 11:38:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 114 transitions. [2020-04-18 11:38:26,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:26,565 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [665958073] [2020-04-18 11:38:26,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:26,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-04-18 11:38:26,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [665958073] [2020-04-18 11:38:26,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 11:38:26,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:26,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:38:26,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:38:26,567 INFO L87 Difference]: Start difference. First operand 49 states and 95 transitions. Second operand 24 states. [2020-04-18 11:38:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:26,630 INFO L93 Difference]: Finished difference Result 51 states and 99 transitions. [2020-04-18 11:38:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 11:38:26,631 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-04-18 11:38:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:26,631 INFO L225 Difference]: With dead ends: 51 [2020-04-18 11:38:26,631 INFO L226 Difference]: Without dead ends: 51 [2020-04-18 11:38:26,632 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 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 11:38:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-04-18 11:38:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-04-18 11:38:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-18 11:38:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 99 transitions. [2020-04-18 11:38:26,635 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 99 transitions. Word has length 26 [2020-04-18 11:38:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:26,636 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 99 transitions. [2020-04-18 11:38:26,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 11:38:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 99 transitions. [2020-04-18 11:38:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 11:38:26,636 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:26,636 INFO L425 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:26,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:26,840 INFO L427 AbstractCegarLoop]: === Iteration 23 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:26,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1306782244, now seen corresponding path program 41 times [2020-04-18 11:38:26,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:26,841 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1456119865] [2020-04-18 11:38:26,842 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:26,844 INFO L259 McrAutomatonBuilder]: Finished intersection with 74 states and 119 transitions. [2020-04-18 11:38:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-04-18 11:38:26,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 11:38:26,845 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:26,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:26,845 INFO L82 PathProgramCache]: Analyzing trace with hash -869524616, now seen corresponding path program 42 times [2020-04-18 11:38:26,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:26,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697914245] [2020-04-18 11:38:26,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:27,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697914245] [2020-04-18 11:38:27,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070148929] [2020-04-18 11:38:27,118 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 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 11:38:27,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:27,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:27,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:27,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-04-18 11:38:27,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:27,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [23] total 25 [2020-04-18 11:38:27,175 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:27,177 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:27,179 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 31 transitions. [2020-04-18 11:38:27,180 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:27,418 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:27,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 11:38:27,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:38:27,418 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 25 states. [2020-04-18 11:38:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:28,012 INFO L93 Difference]: Finished difference Result 74 states and 119 transitions. [2020-04-18 11:38:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 119 transitions. [2020-04-18 11:38:28,012 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:28,013 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1456119865] [2020-04-18 11:38:28,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:28,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:28,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1456119865] [2020-04-18 11:38:28,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 11:38:28,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:28,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 11:38:28,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 11:38:28,014 INFO L87 Difference]: Start difference. First operand 51 states and 99 transitions. Second operand 25 states. [2020-04-18 11:38:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:28,131 INFO L93 Difference]: Finished difference Result 53 states and 103 transitions. [2020-04-18 11:38:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-18 11:38:28,131 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-04-18 11:38:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:28,132 INFO L225 Difference]: With dead ends: 53 [2020-04-18 11:38:28,132 INFO L226 Difference]: Without dead ends: 53 [2020-04-18 11:38:28,134 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 11:38:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-04-18 11:38:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-04-18 11:38:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-18 11:38:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 103 transitions. [2020-04-18 11:38:28,136 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 103 transitions. Word has length 27 [2020-04-18 11:38:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:28,137 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 103 transitions. [2020-04-18 11:38:28,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 11:38:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 103 transitions. [2020-04-18 11:38:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 11:38:28,137 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:28,137 INFO L425 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:28,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:28,338 INFO L427 AbstractCegarLoop]: === Iteration 24 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:28,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1855526653, now seen corresponding path program 43 times [2020-04-18 11:38:28,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:28,339 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [310660967] [2020-04-18 11:38:28,340 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:28,341 INFO L259 McrAutomatonBuilder]: Finished intersection with 77 states and 124 transitions. [2020-04-18 11:38:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-04-18 11:38:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-18 11:38:28,343 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:28,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1185458573, now seen corresponding path program 44 times [2020-04-18 11:38:28,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:28,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349909383] [2020-04-18 11:38:28,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:28,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349909383] [2020-04-18 11:38:28,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865538695] [2020-04-18 11:38:28,615 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 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 11:38:28,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:28,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:28,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:28,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-04-18 11:38:28,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:28,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [24] total 26 [2020-04-18 11:38:28,680 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:28,682 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:28,684 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 32 transitions. [2020-04-18 11:38:28,684 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:28,931 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:28,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-18 11:38:28,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:38:28,932 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 26 states. [2020-04-18 11:38:29,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:29,617 INFO L93 Difference]: Finished difference Result 77 states and 124 transitions. [2020-04-18 11:38:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 124 transitions. [2020-04-18 11:38:29,618 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:29,618 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [310660967] [2020-04-18 11:38:29,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:29,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:29,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [310660967] [2020-04-18 11:38:29,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-18 11:38:29,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-18 11:38:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 11:38:29,620 INFO L87 Difference]: Start difference. First operand 53 states and 103 transitions. Second operand 26 states. [2020-04-18 11:38:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:29,788 INFO L93 Difference]: Finished difference Result 55 states and 107 transitions. [2020-04-18 11:38:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 11:38:29,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-04-18 11:38:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:29,789 INFO L225 Difference]: With dead ends: 55 [2020-04-18 11:38:29,789 INFO L226 Difference]: Without dead ends: 55 [2020-04-18 11:38:29,791 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 11:38:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-18 11:38:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-04-18 11:38:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 11:38:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2020-04-18 11:38:29,794 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 28 [2020-04-18 11:38:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:29,794 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2020-04-18 11:38:29,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-18 11:38:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2020-04-18 11:38:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 11:38:29,795 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:29,795 INFO L425 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:29,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:29,999 INFO L427 AbstractCegarLoop]: === Iteration 25 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:30,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1686734148, now seen corresponding path program 45 times [2020-04-18 11:38:30,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:30,000 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [183687680] [2020-04-18 11:38:30,001 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:30,002 INFO L259 McrAutomatonBuilder]: Finished intersection with 80 states and 129 transitions. [2020-04-18 11:38:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-04-18 11:38:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-18 11:38:30,003 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:30,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:30,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1905490648, now seen corresponding path program 46 times [2020-04-18 11:38:30,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:30,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865005824] [2020-04-18 11:38:30,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:30,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865005824] [2020-04-18 11:38:30,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069568131] [2020-04-18 11:38:30,390 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 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 11:38:30,475 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:30,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:30,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-18 11:38:30,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:30,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:30,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-04-18 11:38:30,519 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:30,522 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:30,527 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 33 transitions. [2020-04-18 11:38:30,527 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:30,897 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:30,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 11:38:30,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 11:38:30,898 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 27 states. [2020-04-18 11:38:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:31,212 INFO L93 Difference]: Finished difference Result 80 states and 129 transitions. [2020-04-18 11:38:31,212 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 129 transitions. [2020-04-18 11:38:31,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:31,213 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [183687680] [2020-04-18 11:38:31,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:31,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-04-18 11:38:31,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [183687680] [2020-04-18 11:38:31,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-18 11:38:31,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:31,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 11:38:31,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-04-18 11:38:31,215 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand 27 states. [2020-04-18 11:38:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:31,298 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2020-04-18 11:38:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 11:38:31,298 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-04-18 11:38:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:31,299 INFO L225 Difference]: With dead ends: 57 [2020-04-18 11:38:31,299 INFO L226 Difference]: Without dead ends: 57 [2020-04-18 11:38:31,300 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 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 11:38:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-04-18 11:38:31,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-04-18 11:38:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-18 11:38:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 111 transitions. [2020-04-18 11:38:31,304 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 111 transitions. Word has length 29 [2020-04-18 11:38:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:31,304 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 111 transitions. [2020-04-18 11:38:31,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-18 11:38:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 111 transitions. [2020-04-18 11:38:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 11:38:31,305 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:31,305 INFO L425 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:31,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:31,509 INFO L427 AbstractCegarLoop]: === Iteration 26 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash -749133789, now seen corresponding path program 47 times [2020-04-18 11:38:31,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:31,510 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [540900400] [2020-04-18 11:38:31,511 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:31,512 INFO L259 McrAutomatonBuilder]: Finished intersection with 83 states and 134 transitions. [2020-04-18 11:38:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-04-18 11:38:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 11:38:31,513 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:31,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1059331309, now seen corresponding path program 48 times [2020-04-18 11:38:31,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:31,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262575021] [2020-04-18 11:38:31,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:31,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262575021] [2020-04-18 11:38:31,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228512414] [2020-04-18 11:38:31,840 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:31,882 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:31,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:31,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:31,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-04-18 11:38:31,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:31,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [26] total 28 [2020-04-18 11:38:31,900 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:31,902 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:31,905 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 34 transitions. [2020-04-18 11:38:31,905 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:32,191 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:32,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:38:32,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:38:32,192 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 28 states. [2020-04-18 11:38:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:32,950 INFO L93 Difference]: Finished difference Result 83 states and 134 transitions. [2020-04-18 11:38:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 134 transitions. [2020-04-18 11:38:32,950 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:32,950 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [540900400] [2020-04-18 11:38:32,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:32,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:32,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [540900400] [2020-04-18 11:38:32,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 11:38:32,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:32,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:38:32,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 11:38:32,953 INFO L87 Difference]: Start difference. First operand 57 states and 111 transitions. Second operand 28 states. [2020-04-18 11:38:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:33,149 INFO L93 Difference]: Finished difference Result 59 states and 115 transitions. [2020-04-18 11:38:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-18 11:38:33,149 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2020-04-18 11:38:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:33,150 INFO L225 Difference]: With dead ends: 59 [2020-04-18 11:38:33,150 INFO L226 Difference]: Without dead ends: 59 [2020-04-18 11:38:33,152 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 11:38:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-04-18 11:38:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-04-18 11:38:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-18 11:38:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 115 transitions. [2020-04-18 11:38:33,154 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 115 transitions. Word has length 30 [2020-04-18 11:38:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:33,155 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 115 transitions. [2020-04-18 11:38:33,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 11:38:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 115 transitions. [2020-04-18 11:38:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 11:38:33,155 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:33,155 INFO L425 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:33,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:33,359 INFO L427 AbstractCegarLoop]: === Iteration 27 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1748293732, now seen corresponding path program 49 times [2020-04-18 11:38:33,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:33,360 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1318568169] [2020-04-18 11:38:33,361 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:33,363 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 139 transitions. [2020-04-18 11:38:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 11:38:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-04-18 11:38:33,364 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:33,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1520468536, now seen corresponding path program 50 times [2020-04-18 11:38:33,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:33,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954549696] [2020-04-18 11:38:33,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:33,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954549696] [2020-04-18 11:38:33,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24147805] [2020-04-18 11:38:33,762 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:33,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:33,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:33,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:33,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-04-18 11:38:33,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:33,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [27] total 29 [2020-04-18 11:38:33,832 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:33,834 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:33,836 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 35 transitions. [2020-04-18 11:38:33,836 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:34,126 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:34,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-04-18 11:38:34,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-04-18 11:38:34,127 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 29 states. [2020-04-18 11:38:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:34,883 INFO L93 Difference]: Finished difference Result 86 states and 139 transitions. [2020-04-18 11:38:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 139 transitions. [2020-04-18 11:38:34,884 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:34,885 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1318568169] [2020-04-18 11:38:34,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:34,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:34,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1318568169] [2020-04-18 11:38:34,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-04-18 11:38:34,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:34,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-04-18 11:38:34,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 11:38:34,887 INFO L87 Difference]: Start difference. First operand 59 states and 115 transitions. Second operand 29 states. [2020-04-18 11:38:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:35,090 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2020-04-18 11:38:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 11:38:35,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-04-18 11:38:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:35,091 INFO L225 Difference]: With dead ends: 61 [2020-04-18 11:38:35,091 INFO L226 Difference]: Without dead ends: 61 [2020-04-18 11:38:35,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-04-18 11:38:35,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-18 11:38:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-04-18 11:38:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-18 11:38:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 119 transitions. [2020-04-18 11:38:35,096 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 119 transitions. Word has length 31 [2020-04-18 11:38:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:35,096 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 119 transitions. [2020-04-18 11:38:35,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-04-18 11:38:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 119 transitions. [2020-04-18 11:38:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 11:38:35,097 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:35,097 INFO L425 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:35,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:35,300 INFO L427 AbstractCegarLoop]: === Iteration 28 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:35,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1637486403, now seen corresponding path program 51 times [2020-04-18 11:38:35,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:35,302 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1716114146] [2020-04-18 11:38:35,303 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:35,304 INFO L259 McrAutomatonBuilder]: Finished intersection with 89 states and 144 transitions. [2020-04-18 11:38:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states. [2020-04-18 11:38:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 11:38:35,305 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:35,306 INFO L82 PathProgramCache]: Analyzing trace with hash -110114893, now seen corresponding path program 52 times [2020-04-18 11:38:35,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:35,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434616908] [2020-04-18 11:38:35,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:35,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434616908] [2020-04-18 11:38:35,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105979516] [2020-04-18 11:38:35,682 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 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 11:38:35,740 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:35,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:35,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 28 conjunts are in the unsatisfiable core [2020-04-18 11:38:35,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:35,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:35,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-04-18 11:38:35,758 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:35,760 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:35,763 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 36 transitions. [2020-04-18 11:38:35,764 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:36,073 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:36,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 11:38:36,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:38:36,075 INFO L87 Difference]: Start difference. First operand 89 states. Second operand 30 states. [2020-04-18 11:38:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:36,459 INFO L93 Difference]: Finished difference Result 89 states and 144 transitions. [2020-04-18 11:38:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 144 transitions. [2020-04-18 11:38:36,460 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:36,460 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1716114146] [2020-04-18 11:38:36,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:36,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-04-18 11:38:36,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1716114146] [2020-04-18 11:38:36,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-04-18 11:38:36,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-04-18 11:38:36,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:38:36,462 INFO L87 Difference]: Start difference. First operand 61 states and 119 transitions. Second operand 30 states. [2020-04-18 11:38:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:36,546 INFO L93 Difference]: Finished difference Result 63 states and 123 transitions. [2020-04-18 11:38:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 11:38:36,547 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-04-18 11:38:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:36,548 INFO L225 Difference]: With dead ends: 63 [2020-04-18 11:38:36,548 INFO L226 Difference]: Without dead ends: 63 [2020-04-18 11:38:36,549 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 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 11:38:36,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-18 11:38:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-04-18 11:38:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-18 11:38:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 123 transitions. [2020-04-18 11:38:36,553 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 123 transitions. Word has length 32 [2020-04-18 11:38:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:36,553 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 123 transitions. [2020-04-18 11:38:36,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-04-18 11:38:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 123 transitions. [2020-04-18 11:38:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 11:38:36,554 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:36,554 INFO L425 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:36,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:36,758 INFO L427 AbstractCegarLoop]: === Iteration 29 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:36,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:36,758 INFO L82 PathProgramCache]: Analyzing trace with hash -777511812, now seen corresponding path program 53 times [2020-04-18 11:38:36,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:36,759 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1371492275] [2020-04-18 11:38:36,760 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:36,761 INFO L259 McrAutomatonBuilder]: Finished intersection with 92 states and 149 transitions. [2020-04-18 11:38:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states. [2020-04-18 11:38:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-04-18 11:38:36,762 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:36,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:36,762 INFO L82 PathProgramCache]: Analyzing trace with hash 881406360, now seen corresponding path program 54 times [2020-04-18 11:38:36,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:36,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461194497] [2020-04-18 11:38:36,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:37,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461194497] [2020-04-18 11:38:37,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914049404] [2020-04-18 11:38:37,184 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 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 11:38:37,243 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:37,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:37,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:37,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-04-18 11:38:37,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:37,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [29] total 31 [2020-04-18 11:38:37,259 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:37,261 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:37,263 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 37 transitions. [2020-04-18 11:38:37,263 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:37,616 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:37,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 11:38:37,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:38:37,617 INFO L87 Difference]: Start difference. First operand 92 states. Second operand 31 states. [2020-04-18 11:38:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:38,484 INFO L93 Difference]: Finished difference Result 92 states and 149 transitions. [2020-04-18 11:38:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 149 transitions. [2020-04-18 11:38:38,485 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:38,485 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1371492275] [2020-04-18 11:38:38,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:38,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:38,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1371492275] [2020-04-18 11:38:38,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-04-18 11:38:38,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:38,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 11:38:38,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 11:38:38,488 INFO L87 Difference]: Start difference. First operand 63 states and 123 transitions. Second operand 31 states. [2020-04-18 11:38:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:38,627 INFO L93 Difference]: Finished difference Result 65 states and 127 transitions. [2020-04-18 11:38:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-18 11:38:38,628 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-04-18 11:38:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:38,629 INFO L225 Difference]: With dead ends: 65 [2020-04-18 11:38:38,629 INFO L226 Difference]: Without dead ends: 65 [2020-04-18 11:38:38,631 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 11:38:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-18 11:38:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-04-18 11:38:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-18 11:38:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 127 transitions. [2020-04-18 11:38:38,634 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 127 transitions. Word has length 33 [2020-04-18 11:38:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:38,634 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 127 transitions. [2020-04-18 11:38:38,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-04-18 11:38:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 127 transitions. [2020-04-18 11:38:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-18 11:38:38,635 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:38,635 INFO L425 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:38,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:38,839 INFO L427 AbstractCegarLoop]: === Iteration 30 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:38,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1666954851, now seen corresponding path program 55 times [2020-04-18 11:38:38,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:38,840 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [822692507] [2020-04-18 11:38:38,841 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:38,842 INFO L259 McrAutomatonBuilder]: Finished intersection with 95 states and 154 transitions. [2020-04-18 11:38:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-04-18 11:38:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-04-18 11:38:38,843 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:38,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1553794131, now seen corresponding path program 56 times [2020-04-18 11:38:38,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:38,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963162505] [2020-04-18 11:38:38,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:39,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963162505] [2020-04-18 11:38:39,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016385948] [2020-04-18 11:38:39,232 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 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 11:38:39,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:39,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:39,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:39,276 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-04-18 11:38:39,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:39,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [30] total 32 [2020-04-18 11:38:39,292 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:39,295 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:39,297 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 38 transitions. [2020-04-18 11:38:39,297 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:39,678 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-04-18 11:38:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-04-18 11:38:39,679 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 32 states. [2020-04-18 11:38:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:40,577 INFO L93 Difference]: Finished difference Result 95 states and 154 transitions. [2020-04-18 11:38:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 154 transitions. [2020-04-18 11:38:40,578 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:40,578 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [822692507] [2020-04-18 11:38:40,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:40,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:40,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [822692507] [2020-04-18 11:38:40,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-04-18 11:38:40,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:40,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-04-18 11:38:40,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-04-18 11:38:40,581 INFO L87 Difference]: Start difference. First operand 65 states and 127 transitions. Second operand 32 states. [2020-04-18 11:38:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:40,777 INFO L93 Difference]: Finished difference Result 67 states and 131 transitions. [2020-04-18 11:38:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 11:38:40,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2020-04-18 11:38:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:40,779 INFO L225 Difference]: With dead ends: 67 [2020-04-18 11:38:40,779 INFO L226 Difference]: Without dead ends: 67 [2020-04-18 11:38:40,780 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-04-18 11:38:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-18 11:38:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-04-18 11:38:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-18 11:38:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 131 transitions. [2020-04-18 11:38:40,782 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 131 transitions. Word has length 34 [2020-04-18 11:38:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:40,783 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 131 transitions. [2020-04-18 11:38:40,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-04-18 11:38:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 131 transitions. [2020-04-18 11:38:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 11:38:40,783 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:40,783 INFO L425 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:40,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:40,984 INFO L427 AbstractCegarLoop]: === Iteration 31 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:40,985 INFO L82 PathProgramCache]: Analyzing trace with hash 136010076, now seen corresponding path program 57 times [2020-04-18 11:38:40,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:40,985 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1050254006] [2020-04-18 11:38:40,986 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:40,987 INFO L259 McrAutomatonBuilder]: Finished intersection with 98 states and 159 transitions. [2020-04-18 11:38:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-04-18 11:38:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-18 11:38:40,988 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash 922978552, now seen corresponding path program 58 times [2020-04-18 11:38:40,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:40,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408543247] [2020-04-18 11:38:40,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:41,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408543247] [2020-04-18 11:38:41,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029649096] [2020-04-18 11:38:41,381 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 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 11:38:41,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:41,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:41,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 31 conjunts are in the unsatisfiable core [2020-04-18 11:38:41,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:41,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:41,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-04-18 11:38:41,463 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:41,465 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:41,469 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 39 transitions. [2020-04-18 11:38:41,469 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:41,904 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:41,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 11:38:41,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 11:38:41,905 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 33 states. [2020-04-18 11:38:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:42,385 INFO L93 Difference]: Finished difference Result 98 states and 159 transitions. [2020-04-18 11:38:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 159 transitions. [2020-04-18 11:38:42,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:42,386 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1050254006] [2020-04-18 11:38:42,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:42,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-04-18 11:38:42,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1050254006] [2020-04-18 11:38:42,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-04-18 11:38:42,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:42,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-04-18 11:38:42,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-04-18 11:38:42,390 INFO L87 Difference]: Start difference. First operand 67 states and 131 transitions. Second operand 33 states. [2020-04-18 11:38:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:42,495 INFO L93 Difference]: Finished difference Result 69 states and 135 transitions. [2020-04-18 11:38:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 11:38:42,496 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-04-18 11:38:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:42,496 INFO L225 Difference]: With dead ends: 69 [2020-04-18 11:38:42,497 INFO L226 Difference]: Without dead ends: 69 [2020-04-18 11:38:42,497 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 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 11:38:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-18 11:38:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-04-18 11:38:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-18 11:38:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2020-04-18 11:38:42,501 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 35 [2020-04-18 11:38:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:42,501 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2020-04-18 11:38:42,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-04-18 11:38:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2020-04-18 11:38:42,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-18 11:38:42,502 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:42,502 INFO L425 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:42,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:42,706 INFO L427 AbstractCegarLoop]: === Iteration 32 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:42,706 INFO L82 PathProgramCache]: Analyzing trace with hash -78637693, now seen corresponding path program 59 times [2020-04-18 11:38:42,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:42,707 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1902689365] [2020-04-18 11:38:42,708 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:42,709 INFO L259 McrAutomatonBuilder]: Finished intersection with 101 states and 164 transitions. [2020-04-18 11:38:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2020-04-18 11:38:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-18 11:38:42,710 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:42,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1452435213, now seen corresponding path program 60 times [2020-04-18 11:38:42,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:42,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401932829] [2020-04-18 11:38:42,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:43,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401932829] [2020-04-18 11:38:43,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867114852] [2020-04-18 11:38:43,164 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:43,211 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:43,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:43,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:43,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-04-18 11:38:43,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:43,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [32] total 34 [2020-04-18 11:38:43,228 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:43,231 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:43,234 INFO L259 McrAutomatonBuilder]: Finished intersection with 39 states and 40 transitions. [2020-04-18 11:38:43,234 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:43,653 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 11:38:43,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 11:38:43,654 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 34 states. [2020-04-18 11:38:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:44,692 INFO L93 Difference]: Finished difference Result 101 states and 164 transitions. [2020-04-18 11:38:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 164 transitions. [2020-04-18 11:38:44,693 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:44,693 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1902689365] [2020-04-18 11:38:44,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:44,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:44,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1902689365] [2020-04-18 11:38:44,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-04-18 11:38:44,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-04-18 11:38:44,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 11:38:44,696 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand 34 states. [2020-04-18 11:38:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:44,932 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2020-04-18 11:38:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-18 11:38:44,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-04-18 11:38:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:44,934 INFO L225 Difference]: With dead ends: 71 [2020-04-18 11:38:44,934 INFO L226 Difference]: Without dead ends: 71 [2020-04-18 11:38:44,935 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 11:38:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-18 11:38:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-04-18 11:38:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 11:38:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 139 transitions. [2020-04-18 11:38:44,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 139 transitions. Word has length 36 [2020-04-18 11:38:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:44,938 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 139 transitions. [2020-04-18 11:38:44,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-04-18 11:38:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 139 transitions. [2020-04-18 11:38:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 11:38:44,939 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:44,939 INFO L425 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:45,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:45,142 INFO L427 AbstractCegarLoop]: === Iteration 33 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1857216060, now seen corresponding path program 61 times [2020-04-18 11:38:45,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:45,143 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [583885823] [2020-04-18 11:38:45,145 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:45,146 INFO L259 McrAutomatonBuilder]: Finished intersection with 104 states and 169 transitions. [2020-04-18 11:38:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states. [2020-04-18 11:38:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 11:38:45,147 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2075817896, now seen corresponding path program 62 times [2020-04-18 11:38:45,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:45,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530723734] [2020-04-18 11:38:45,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:45,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530723734] [2020-04-18 11:38:45,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309928123] [2020-04-18 11:38:45,648 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 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 11:38:45,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:45,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:45,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:45,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-04-18 11:38:45,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:45,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [33] total 35 [2020-04-18 11:38:45,715 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:45,717 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:45,721 INFO L259 McrAutomatonBuilder]: Finished intersection with 40 states and 41 transitions. [2020-04-18 11:38:45,721 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:46,178 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-04-18 11:38:46,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 11:38:46,179 INFO L87 Difference]: Start difference. First operand 104 states. Second operand 35 states. [2020-04-18 11:38:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:47,280 INFO L93 Difference]: Finished difference Result 104 states and 169 transitions. [2020-04-18 11:38:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 169 transitions. [2020-04-18 11:38:47,281 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:47,282 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [583885823] [2020-04-18 11:38:47,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:47,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:47,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [583885823] [2020-04-18 11:38:47,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-04-18 11:38:47,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:47,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-04-18 11:38:47,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:38:47,284 INFO L87 Difference]: Start difference. First operand 71 states and 139 transitions. Second operand 35 states. [2020-04-18 11:38:47,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:47,480 INFO L93 Difference]: Finished difference Result 73 states and 143 transitions. [2020-04-18 11:38:47,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 11:38:47,481 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-04-18 11:38:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:47,482 INFO L225 Difference]: With dead ends: 73 [2020-04-18 11:38:47,482 INFO L226 Difference]: Without dead ends: 73 [2020-04-18 11:38:47,483 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:38:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-18 11:38:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-04-18 11:38:47,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-18 11:38:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2020-04-18 11:38:47,486 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 37 [2020-04-18 11:38:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:47,486 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2020-04-18 11:38:47,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-04-18 11:38:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2020-04-18 11:38:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-18 11:38:47,487 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:47,487 INFO L425 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:47,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:47,688 INFO L427 AbstractCegarLoop]: === Iteration 34 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1739140259, now seen corresponding path program 63 times [2020-04-18 11:38:47,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:47,689 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1332409176] [2020-04-18 11:38:47,690 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:47,691 INFO L259 McrAutomatonBuilder]: Finished intersection with 107 states and 174 transitions. [2020-04-18 11:38:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-04-18 11:38:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-04-18 11:38:47,692 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:47,693 INFO L82 PathProgramCache]: Analyzing trace with hash 74155411, now seen corresponding path program 64 times [2020-04-18 11:38:47,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:47,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741547855] [2020-04-18 11:38:47,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:48,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741547855] [2020-04-18 11:38:48,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571913184] [2020-04-18 11:38:48,168 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 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 11:38:48,228 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:48,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:48,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 34 conjunts are in the unsatisfiable core [2020-04-18 11:38:48,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:48,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:48,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-04-18 11:38:48,248 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:48,250 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:48,254 INFO L259 McrAutomatonBuilder]: Finished intersection with 41 states and 42 transitions. [2020-04-18 11:38:48,255 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:48,749 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-04-18 11:38:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:38:48,750 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 36 states. [2020-04-18 11:38:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:49,305 INFO L93 Difference]: Finished difference Result 107 states and 174 transitions. [2020-04-18 11:38:49,305 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 174 transitions. [2020-04-18 11:38:49,306 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:49,306 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1332409176] [2020-04-18 11:38:49,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:49,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-04-18 11:38:49,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1332409176] [2020-04-18 11:38:49,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-04-18 11:38:49,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:49,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-04-18 11:38:49,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:38:49,308 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand 36 states. [2020-04-18 11:38:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:49,390 INFO L93 Difference]: Finished difference Result 75 states and 147 transitions. [2020-04-18 11:38:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 11:38:49,391 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2020-04-18 11:38:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:49,391 INFO L225 Difference]: With dead ends: 75 [2020-04-18 11:38:49,392 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 11:38:49,392 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:38:49,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 11:38:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-04-18 11:38:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-18 11:38:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 147 transitions. [2020-04-18 11:38:49,395 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 147 transitions. Word has length 38 [2020-04-18 11:38:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:49,395 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 147 transitions. [2020-04-18 11:38:49,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-04-18 11:38:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 147 transitions. [2020-04-18 11:38:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-04-18 11:38:49,396 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:49,396 INFO L425 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:49,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:49,597 INFO L427 AbstractCegarLoop]: === Iteration 35 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:49,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1921209572, now seen corresponding path program 65 times [2020-04-18 11:38:49,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:49,598 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [245560037] [2020-04-18 11:38:49,599 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:49,601 INFO L259 McrAutomatonBuilder]: Finished intersection with 110 states and 179 transitions. [2020-04-18 11:38:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-04-18 11:38:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-04-18 11:38:49,602 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:49,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1996148808, now seen corresponding path program 66 times [2020-04-18 11:38:49,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:49,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597111961] [2020-04-18 11:38:49,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:50,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597111961] [2020-04-18 11:38:50,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315770559] [2020-04-18 11:38:50,105 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 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 11:38:50,146 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:50,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:50,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:50,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-04-18 11:38:50,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:50,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [35] total 37 [2020-04-18 11:38:50,167 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:50,169 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:50,172 INFO L259 McrAutomatonBuilder]: Finished intersection with 42 states and 43 transitions. [2020-04-18 11:38:50,172 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:50,688 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:50,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 11:38:50,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 11:38:50,689 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 37 states. [2020-04-18 11:38:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:51,871 INFO L93 Difference]: Finished difference Result 110 states and 179 transitions. [2020-04-18 11:38:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 179 transitions. [2020-04-18 11:38:51,871 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:51,872 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [245560037] [2020-04-18 11:38:51,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:51,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:51,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [245560037] [2020-04-18 11:38:51,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-18 11:38:51,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:51,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 11:38:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-04-18 11:38:51,874 INFO L87 Difference]: Start difference. First operand 75 states and 147 transitions. Second operand 37 states. [2020-04-18 11:38:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:52,106 INFO L93 Difference]: Finished difference Result 77 states and 151 transitions. [2020-04-18 11:38:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-18 11:38:52,107 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2020-04-18 11:38:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:52,108 INFO L225 Difference]: With dead ends: 77 [2020-04-18 11:38:52,108 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 11:38:52,109 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-04-18 11:38:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 11:38:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-04-18 11:38:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-18 11:38:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-04-18 11:38:52,112 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 39 [2020-04-18 11:38:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:52,113 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-04-18 11:38:52,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-04-18 11:38:52,113 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-04-18 11:38:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 11:38:52,113 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:52,113 INFO L425 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:52,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:52,317 INFO L427 AbstractCegarLoop]: === Iteration 36 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 572062659, now seen corresponding path program 67 times [2020-04-18 11:38:52,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:52,318 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2082299875] [2020-04-18 11:38:52,319 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:52,320 INFO L259 McrAutomatonBuilder]: Finished intersection with 113 states and 184 transitions. [2020-04-18 11:38:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states. [2020-04-18 11:38:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-04-18 11:38:52,325 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1751070157, now seen corresponding path program 68 times [2020-04-18 11:38:52,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:52,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975515446] [2020-04-18 11:38:52,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:52,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975515446] [2020-04-18 11:38:52,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992508794] [2020-04-18 11:38:52,928 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 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 11:38:52,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:38:52,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:52,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:52,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-04-18 11:38:53,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:53,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [36] total 38 [2020-04-18 11:38:53,003 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:53,006 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:53,009 INFO L259 McrAutomatonBuilder]: Finished intersection with 43 states and 44 transitions. [2020-04-18 11:38:53,009 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:53,523 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-04-18 11:38:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 11:38:53,523 INFO L87 Difference]: Start difference. First operand 113 states. Second operand 38 states. [2020-04-18 11:38:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:54,771 INFO L93 Difference]: Finished difference Result 113 states and 184 transitions. [2020-04-18 11:38:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 184 transitions. [2020-04-18 11:38:54,771 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:54,772 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2082299875] [2020-04-18 11:38:54,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:54,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:38:54,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2082299875] [2020-04-18 11:38:54,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-04-18 11:38:54,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:54,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-04-18 11:38:54,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 11:38:54,774 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 38 states. [2020-04-18 11:38:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:55,043 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2020-04-18 11:38:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 11:38:55,043 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-04-18 11:38:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:55,044 INFO L225 Difference]: With dead ends: 79 [2020-04-18 11:38:55,044 INFO L226 Difference]: Without dead ends: 79 [2020-04-18 11:38:55,045 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 11:38:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-18 11:38:55,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-04-18 11:38:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-18 11:38:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 155 transitions. [2020-04-18 11:38:55,048 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 155 transitions. Word has length 40 [2020-04-18 11:38:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:55,049 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 155 transitions. [2020-04-18 11:38:55,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-04-18 11:38:55,049 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2020-04-18 11:38:55,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-18 11:38:55,049 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:55,049 INFO L425 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:55,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:55,250 INFO L427 AbstractCegarLoop]: === Iteration 37 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:55,251 INFO L82 PathProgramCache]: Analyzing trace with hash 554090492, now seen corresponding path program 69 times [2020-04-18 11:38:55,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:55,252 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [132261941] [2020-04-18 11:38:55,253 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:55,254 INFO L259 McrAutomatonBuilder]: Finished intersection with 116 states and 189 transitions. [2020-04-18 11:38:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states. [2020-04-18 11:38:55,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-18 11:38:55,255 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:55,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1551400728, now seen corresponding path program 70 times [2020-04-18 11:38:55,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:55,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823384991] [2020-04-18 11:38:55,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:55,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823384991] [2020-04-18 11:38:55,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907897371] [2020-04-18 11:38:55,839 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:55,904 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:38:55,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:55,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 37 conjunts are in the unsatisfiable core [2020-04-18 11:38:55,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:55,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:38:55,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-04-18 11:38:55,934 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:55,937 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:55,942 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 45 transitions. [2020-04-18 11:38:55,943 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:56,473 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:38:56,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 11:38:56,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 11:38:56,474 INFO L87 Difference]: Start difference. First operand 116 states. Second operand 39 states. [2020-04-18 11:38:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:57,108 INFO L93 Difference]: Finished difference Result 116 states and 189 transitions. [2020-04-18 11:38:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 189 transitions. [2020-04-18 11:38:57,108 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:38:57,109 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [132261941] [2020-04-18 11:38:57,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:57,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-04-18 11:38:57,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [132261941] [2020-04-18 11:38:57,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-04-18 11:38:57,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:38:57,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-04-18 11:38:57,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 11:38:57,110 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand 39 states. [2020-04-18 11:38:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:38:57,210 INFO L93 Difference]: Finished difference Result 81 states and 159 transitions. [2020-04-18 11:38:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 11:38:57,211 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-04-18 11:38:57,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:38:57,211 INFO L225 Difference]: With dead ends: 81 [2020-04-18 11:38:57,211 INFO L226 Difference]: Without dead ends: 81 [2020-04-18 11:38:57,212 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 11:38:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-18 11:38:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-04-18 11:38:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-18 11:38:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 159 transitions. [2020-04-18 11:38:57,215 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 159 transitions. Word has length 41 [2020-04-18 11:38:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:38:57,215 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 159 transitions. [2020-04-18 11:38:57,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-04-18 11:38:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 159 transitions. [2020-04-18 11:38:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 11:38:57,215 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:38:57,216 INFO L425 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1] [2020-04-18 11:38:57,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:57,417 INFO L427 AbstractCegarLoop]: === Iteration 38 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:38:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash -3046685, now seen corresponding path program 71 times [2020-04-18 11:38:57,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:38:57,418 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1698251197] [2020-04-18 11:38:57,419 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:57,421 INFO L259 McrAutomatonBuilder]: Finished intersection with 119 states and 194 transitions. [2020-04-18 11:38:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states. [2020-04-18 11:38:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 11:38:57,422 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:38:57,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:38:57,422 INFO L82 PathProgramCache]: Analyzing trace with hash 848783059, now seen corresponding path program 72 times [2020-04-18 11:38:57,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:38:57,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063318361] [2020-04-18 11:38:57,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:38:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:38:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:38:58,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063318361] [2020-04-18 11:38:58,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194204874] [2020-04-18 11:38:58,009 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:38:58,051 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:38:58,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:38:58,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:38:58,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:38:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-04-18 11:38:58,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:38:58,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [38] total 40 [2020-04-18 11:38:58,075 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:38:58,078 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:38:58,082 INFO L259 McrAutomatonBuilder]: Finished intersection with 45 states and 46 transitions. [2020-04-18 11:38:58,082 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:38:58,634 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:38:58,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-04-18 11:38:58,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-04-18 11:38:58,635 INFO L87 Difference]: Start difference. First operand 119 states. Second operand 40 states. [2020-04-18 11:39:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:00,037 INFO L93 Difference]: Finished difference Result 119 states and 194 transitions. [2020-04-18 11:39:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 194 transitions. [2020-04-18 11:39:00,037 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:39:00,038 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1698251197] [2020-04-18 11:39:00,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:00,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:39:00,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1698251197] [2020-04-18 11:39:00,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-04-18 11:39:00,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:39:00,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-04-18 11:39:00,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 11:39:00,040 INFO L87 Difference]: Start difference. First operand 81 states and 159 transitions. Second operand 40 states. [2020-04-18 11:39:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:00,267 INFO L93 Difference]: Finished difference Result 83 states and 163 transitions. [2020-04-18 11:39:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 11:39:00,267 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2020-04-18 11:39:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:39:00,268 INFO L225 Difference]: With dead ends: 83 [2020-04-18 11:39:00,268 INFO L226 Difference]: Without dead ends: 83 [2020-04-18 11:39:00,268 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 11:39:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-18 11:39:00,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-04-18 11:39:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-18 11:39:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 163 transitions. [2020-04-18 11:39:00,271 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 163 transitions. Word has length 42 [2020-04-18 11:39:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:39:00,271 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 163 transitions. [2020-04-18 11:39:00,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-04-18 11:39:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 163 transitions. [2020-04-18 11:39:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-18 11:39:00,272 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:39:00,272 INFO L425 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2020-04-18 11:39:00,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:00,477 INFO L427 AbstractCegarLoop]: === Iteration 39 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:39:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:00,478 INFO L82 PathProgramCache]: Analyzing trace with hash -94429988, now seen corresponding path program 73 times [2020-04-18 11:39:00,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:39:00,478 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [671422345] [2020-04-18 11:39:00,480 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:00,481 INFO L259 McrAutomatonBuilder]: Finished intersection with 122 states and 199 transitions. [2020-04-18 11:39:00,482 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2020-04-18 11:39:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-04-18 11:39:00,482 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:39:00,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:00,482 INFO L82 PathProgramCache]: Analyzing trace with hash 542471800, now seen corresponding path program 74 times [2020-04-18 11:39:00,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:39:00,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125070418] [2020-04-18 11:39:00,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:39:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:39:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:39:01,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125070418] [2020-04-18 11:39:01,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376027705] [2020-04-18 11:39:01,083 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:01,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:39:01,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:39:01,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:39:01,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:39:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-04-18 11:39:01,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:01,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [39] total 41 [2020-04-18 11:39:01,144 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:39:01,148 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:01,152 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 47 transitions. [2020-04-18 11:39:01,152 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:39:01,739 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:39:01,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 11:39:01,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 11:39:01,740 INFO L87 Difference]: Start difference. First operand 122 states. Second operand 41 states. [2020-04-18 11:39:03,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:03,213 INFO L93 Difference]: Finished difference Result 122 states and 199 transitions. [2020-04-18 11:39:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 199 transitions. [2020-04-18 11:39:03,214 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:39:03,214 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [671422345] [2020-04-18 11:39:03,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:03,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:39:03,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [671422345] [2020-04-18 11:39:03,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 11:39:03,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:39:03,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 11:39:03,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-04-18 11:39:03,216 INFO L87 Difference]: Start difference. First operand 83 states and 163 transitions. Second operand 41 states. [2020-04-18 11:39:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:03,441 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2020-04-18 11:39:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-18 11:39:03,441 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-04-18 11:39:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:39:03,442 INFO L225 Difference]: With dead ends: 85 [2020-04-18 11:39:03,442 INFO L226 Difference]: Without dead ends: 85 [2020-04-18 11:39:03,443 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-04-18 11:39:03,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-18 11:39:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-04-18 11:39:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-18 11:39:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 167 transitions. [2020-04-18 11:39:03,448 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 167 transitions. Word has length 43 [2020-04-18 11:39:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:39:03,448 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 167 transitions. [2020-04-18 11:39:03,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 11:39:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 167 transitions. [2020-04-18 11:39:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-04-18 11:39:03,448 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:39:03,448 INFO L425 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1] [2020-04-18 11:39:03,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:03,649 INFO L427 AbstractCegarLoop]: === Iteration 40 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:39:03,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:03,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1367654915, now seen corresponding path program 75 times [2020-04-18 11:39:03,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:39:03,650 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2079693345] [2020-04-18 11:39:03,652 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:03,653 INFO L259 McrAutomatonBuilder]: Finished intersection with 125 states and 204 transitions. [2020-04-18 11:39:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2020-04-18 11:39:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-04-18 11:39:03,654 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:39:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash -363242637, now seen corresponding path program 76 times [2020-04-18 11:39:03,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:39:03,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525170418] [2020-04-18 11:39:03,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:39:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:39:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:39:04,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525170418] [2020-04-18 11:39:04,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637889072] [2020-04-18 11:39:04,552 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:04,648 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:39:04,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:39:04,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2020-04-18 11:39:04,652 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:39:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:39:04,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:39:04,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-04-18 11:39:04,671 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:39:04,677 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:04,686 INFO L259 McrAutomatonBuilder]: Finished intersection with 47 states and 48 transitions. [2020-04-18 11:39:04,686 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:39:05,481 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:39:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-04-18 11:39:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:39:05,482 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 42 states. [2020-04-18 11:39:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:06,211 INFO L93 Difference]: Finished difference Result 125 states and 204 transitions. [2020-04-18 11:39:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 204 transitions. [2020-04-18 11:39:06,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:39:06,212 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2079693345] [2020-04-18 11:39:06,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:06,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-04-18 11:39:06,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2079693345] [2020-04-18 11:39:06,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-04-18 11:39:06,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:39:06,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-04-18 11:39:06,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:39:06,214 INFO L87 Difference]: Start difference. First operand 85 states and 167 transitions. Second operand 42 states. [2020-04-18 11:39:06,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:06,362 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2020-04-18 11:39:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-18 11:39:06,362 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2020-04-18 11:39:06,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:39:06,363 INFO L225 Difference]: With dead ends: 87 [2020-04-18 11:39:06,364 INFO L226 Difference]: Without dead ends: 87 [2020-04-18 11:39:06,364 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:39:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-18 11:39:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-04-18 11:39:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-18 11:39:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 171 transitions. [2020-04-18 11:39:06,368 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 171 transitions. Word has length 44 [2020-04-18 11:39:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:39:06,368 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 171 transitions. [2020-04-18 11:39:06,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-04-18 11:39:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 171 transitions. [2020-04-18 11:39:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 11:39:06,368 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:39:06,369 INFO L425 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2020-04-18 11:39:06,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:06,572 INFO L427 AbstractCegarLoop]: === Iteration 41 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:39:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash -552353348, now seen corresponding path program 77 times [2020-04-18 11:39:06,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:39:06,573 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [97239418] [2020-04-18 11:39:06,574 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:06,576 INFO L259 McrAutomatonBuilder]: Finished intersection with 128 states and 209 transitions. [2020-04-18 11:39:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-04-18 11:39:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-04-18 11:39:06,577 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:39:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1624380888, now seen corresponding path program 78 times [2020-04-18 11:39:06,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:39:06,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145956470] [2020-04-18 11:39:06,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:39:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:39:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:39:07,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145956470] [2020-04-18 11:39:07,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766097254] [2020-04-18 11:39:07,389 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:07,431 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:39:07,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:39:07,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:39:07,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:39:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-04-18 11:39:07,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:07,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [41] total 43 [2020-04-18 11:39:07,452 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:39:07,454 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:07,459 INFO L259 McrAutomatonBuilder]: Finished intersection with 48 states and 49 transitions. [2020-04-18 11:39:07,459 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:39:08,125 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:39:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 11:39:08,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 11:39:08,126 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 43 states. [2020-04-18 11:39:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:09,707 INFO L93 Difference]: Finished difference Result 128 states and 209 transitions. [2020-04-18 11:39:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 209 transitions. [2020-04-18 11:39:09,708 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:39:09,708 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [97239418] [2020-04-18 11:39:09,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:09,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:39:09,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [97239418] [2020-04-18 11:39:09,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-04-18 11:39:09,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:39:09,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-04-18 11:39:09,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 11:39:09,710 INFO L87 Difference]: Start difference. First operand 87 states and 171 transitions. Second operand 43 states. [2020-04-18 11:39:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:09,909 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2020-04-18 11:39:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-18 11:39:09,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-04-18 11:39:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:39:09,911 INFO L225 Difference]: With dead ends: 89 [2020-04-18 11:39:09,911 INFO L226 Difference]: Without dead ends: 89 [2020-04-18 11:39:09,912 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 11:39:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-18 11:39:09,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-04-18 11:39:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-04-18 11:39:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 175 transitions. [2020-04-18 11:39:09,915 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 175 transitions. Word has length 45 [2020-04-18 11:39:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:39:09,916 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 175 transitions. [2020-04-18 11:39:09,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-04-18 11:39:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 175 transitions. [2020-04-18 11:39:09,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-04-18 11:39:09,916 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:39:09,916 INFO L425 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1] [2020-04-18 11:39:10,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:10,118 INFO L427 AbstractCegarLoop]: === Iteration 42 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:39:10,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash 56932643, now seen corresponding path program 79 times [2020-04-18 11:39:10,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:39:10,119 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1433077854] [2020-04-18 11:39:10,120 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:10,122 INFO L259 McrAutomatonBuilder]: Finished intersection with 131 states and 214 transitions. [2020-04-18 11:39:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states. [2020-04-18 11:39:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-04-18 11:39:10,123 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:39:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:10,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1183799277, now seen corresponding path program 80 times [2020-04-18 11:39:10,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:39:10,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906442493] [2020-04-18 11:39:10,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:39:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:39:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:39:11,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906442493] [2020-04-18 11:39:11,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221450749] [2020-04-18 11:39:11,220 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:11,267 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-04-18 11:39:11,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:39:11,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:39:11,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:39:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-04-18 11:39:11,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:11,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [42] total 44 [2020-04-18 11:39:11,297 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:39:11,300 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:11,304 INFO L259 McrAutomatonBuilder]: Finished intersection with 49 states and 50 transitions. [2020-04-18 11:39:11,304 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:39:11,988 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:39:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-04-18 11:39:11,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 11:39:11,989 INFO L87 Difference]: Start difference. First operand 131 states. Second operand 44 states. [2020-04-18 11:39:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:13,666 INFO L93 Difference]: Finished difference Result 131 states and 214 transitions. [2020-04-18 11:39:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 214 transitions. [2020-04-18 11:39:13,666 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:39:13,667 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1433077854] [2020-04-18 11:39:13,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:13,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:39:13,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1433077854] [2020-04-18 11:39:13,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-04-18 11:39:13,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:39:13,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-04-18 11:39:13,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-04-18 11:39:13,668 INFO L87 Difference]: Start difference. First operand 89 states and 175 transitions. Second operand 44 states. [2020-04-18 11:39:13,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:13,954 INFO L93 Difference]: Finished difference Result 91 states and 179 transitions. [2020-04-18 11:39:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 11:39:13,954 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2020-04-18 11:39:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:39:13,956 INFO L225 Difference]: With dead ends: 91 [2020-04-18 11:39:13,956 INFO L226 Difference]: Without dead ends: 91 [2020-04-18 11:39:13,956 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-04-18 11:39:13,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-18 11:39:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-04-18 11:39:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-18 11:39:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 179 transitions. [2020-04-18 11:39:13,959 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 179 transitions. Word has length 46 [2020-04-18 11:39:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:39:13,959 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 179 transitions. [2020-04-18 11:39:13,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-04-18 11:39:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 179 transitions. [2020-04-18 11:39:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 11:39:13,960 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:39:13,960 INFO L425 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2020-04-18 11:39:14,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:14,161 INFO L427 AbstractCegarLoop]: === Iteration 43 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:39:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:14,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1764929180, now seen corresponding path program 81 times [2020-04-18 11:39:14,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:39:14,162 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1999159243] [2020-04-18 11:39:14,163 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:14,165 INFO L259 McrAutomatonBuilder]: Finished intersection with 134 states and 219 transitions. [2020-04-18 11:39:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states. [2020-04-18 11:39:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 11:39:14,166 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:39:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1956928824, now seen corresponding path program 82 times [2020-04-18 11:39:14,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:39:14,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816515721] [2020-04-18 11:39:14,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:39:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:39:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:39:15,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816515721] [2020-04-18 11:39:15,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597690903] [2020-04-18 11:39:15,040 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:15,102 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:39:15,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:39:15,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 43 conjunts are in the unsatisfiable core [2020-04-18 11:39:15,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:39:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:39:15,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:39:15,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-04-18 11:39:15,120 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:39:15,124 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:15,131 INFO L259 McrAutomatonBuilder]: Finished intersection with 50 states and 51 transitions. [2020-04-18 11:39:15,131 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:39:15,831 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:39:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 11:39:15,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 11:39:15,832 INFO L87 Difference]: Start difference. First operand 134 states. Second operand 45 states. [2020-04-18 11:39:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:16,667 INFO L93 Difference]: Finished difference Result 134 states and 219 transitions. [2020-04-18 11:39:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 219 transitions. [2020-04-18 11:39:16,668 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:39:16,668 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1999159243] [2020-04-18 11:39:16,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:16,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-04-18 11:39:16,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1999159243] [2020-04-18 11:39:16,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-04-18 11:39:16,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:39:16,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-04-18 11:39:16,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 11:39:16,670 INFO L87 Difference]: Start difference. First operand 91 states and 179 transitions. Second operand 45 states. [2020-04-18 11:39:16,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:16,832 INFO L93 Difference]: Finished difference Result 93 states and 183 transitions. [2020-04-18 11:39:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 11:39:16,833 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2020-04-18 11:39:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:39:16,834 INFO L225 Difference]: With dead ends: 93 [2020-04-18 11:39:16,834 INFO L226 Difference]: Without dead ends: 93 [2020-04-18 11:39:16,835 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 11:39:16,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-18 11:39:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-04-18 11:39:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-18 11:39:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 183 transitions. [2020-04-18 11:39:16,838 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 183 transitions. Word has length 47 [2020-04-18 11:39:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:39:16,838 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 183 transitions. [2020-04-18 11:39:16,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-04-18 11:39:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 183 transitions. [2020-04-18 11:39:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-04-18 11:39:16,838 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:39:16,838 INFO L425 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1] [2020-04-18 11:39:17,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:17,039 INFO L427 AbstractCegarLoop]: === Iteration 44 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:39:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1121753021, now seen corresponding path program 83 times [2020-04-18 11:39:17,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:39:17,041 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [705904345] [2020-04-18 11:39:17,042 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:17,044 INFO L259 McrAutomatonBuilder]: Finished intersection with 137 states and 224 transitions. [2020-04-18 11:39:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2020-04-18 11:39:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-04-18 11:39:17,045 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:39:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 535252147, now seen corresponding path program 84 times [2020-04-18 11:39:17,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:39:17,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882183206] [2020-04-18 11:39:17,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:39:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:39:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:39:17,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882183206] [2020-04-18 11:39:17,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033558488] [2020-04-18 11:39:17,824 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:17,866 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2020-04-18 11:39:17,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:39:17,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-04-18 11:39:17,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:39:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-04-18 11:39:17,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:17,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [44] total 46 [2020-04-18 11:39:17,892 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:39:17,896 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:17,901 INFO L259 McrAutomatonBuilder]: Finished intersection with 51 states and 52 transitions. [2020-04-18 11:39:17,901 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:39:18,669 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:39:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-04-18 11:39:18,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 11:39:18,670 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 46 states. [2020-04-18 11:39:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:20,473 INFO L93 Difference]: Finished difference Result 137 states and 224 transitions. [2020-04-18 11:39:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 224 transitions. [2020-04-18 11:39:20,474 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:39:20,474 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [705904345] [2020-04-18 11:39:20,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:20,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:39:20,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [705904345] [2020-04-18 11:39:20,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-04-18 11:39:20,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:39:20,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-04-18 11:39:20,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-04-18 11:39:20,476 INFO L87 Difference]: Start difference. First operand 93 states and 183 transitions. Second operand 46 states. [2020-04-18 11:39:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:20,779 INFO L93 Difference]: Finished difference Result 95 states and 187 transitions. [2020-04-18 11:39:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-18 11:39:20,787 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 48 [2020-04-18 11:39:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:39:20,788 INFO L225 Difference]: With dead ends: 95 [2020-04-18 11:39:20,788 INFO L226 Difference]: Without dead ends: 95 [2020-04-18 11:39:20,789 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-04-18 11:39:20,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-18 11:39:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-04-18 11:39:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-18 11:39:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2020-04-18 11:39:20,792 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 48 [2020-04-18 11:39:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:39:20,792 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2020-04-18 11:39:20,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-04-18 11:39:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2020-04-18 11:39:20,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-04-18 11:39:20,793 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:39:20,793 INFO L425 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2020-04-18 11:39:20,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:20,996 INFO L427 AbstractCegarLoop]: === Iteration 45 === [threadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:39:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash -414588036, now seen corresponding path program 85 times [2020-04-18 11:39:20,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:39:20,997 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [643417534] [2020-04-18 11:39:20,999 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:21,000 INFO L259 McrAutomatonBuilder]: Finished intersection with 140 states and 229 transitions. [2020-04-18 11:39:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-04-18 11:39:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-04-18 11:39:21,001 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:39:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash -587051880, now seen corresponding path program 86 times [2020-04-18 11:39:21,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:39:21,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644876514] [2020-04-18 11:39:21,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:39:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:39:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2020-04-18 11:39:21,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644876514] [2020-04-18 11:39:21,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:39:21,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:39:21,077 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:39:21,081 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:21,090 INFO L259 McrAutomatonBuilder]: Finished intersection with 52 states and 53 transitions. [2020-04-18 11:39:21,090 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:39:21,108 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:39:21,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 11:39:21,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 11:39:21,109 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 3 states. [2020-04-18 11:39:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:21,112 INFO L93 Difference]: Finished difference Result 141 states and 229 transitions. [2020-04-18 11:39:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 229 transitions. [2020-04-18 11:39:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-04-18 11:39:21,113 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:39:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:39:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash -414588036, now seen corresponding path program 87 times [2020-04-18 11:39:21,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:39:21,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041553893] [2020-04-18 11:39:21,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:39:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:39:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:39:22,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041553893] [2020-04-18 11:39:22,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473665263] [2020-04-18 11:39:22,558 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:39:22,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:39:22,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:39:22,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 11:39:22,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:39:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2020-04-18 11:39:22,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:22,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [45] total 46 [2020-04-18 11:39:22,650 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:39:22,655 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:39:22,669 INFO L259 McrAutomatonBuilder]: Finished intersection with 95 states and 139 transitions. [2020-04-18 11:39:22,669 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:39:26,905 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 44 times. [2020-04-18 11:39:26,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-04-18 11:39:26,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=8147, Unknown=0, NotChecked=0, Total=8372 [2020-04-18 11:39:26,906 INFO L87 Difference]: Start difference. First operand 141 states and 229 transitions. Second operand 91 states. [2020-04-18 11:39:28,247 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 18 [2020-04-18 11:39:28,797 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:29,290 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:29,809 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:30,328 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:30,820 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:31,319 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:31,885 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:32,385 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:32,960 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:33,577 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:34,081 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:34,582 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:35,085 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:35,585 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:36,080 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:36,582 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:37,081 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:37,595 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:38,094 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:38,591 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:39,095 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:39,602 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:40,100 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:40,616 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:41,127 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:41,643 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:42,165 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:42,665 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:43,200 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:43,694 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:44,200 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:44,704 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:45,215 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:45,717 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:46,225 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:46,730 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:47,225 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:47,718 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:48,234 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:48,735 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 19 [2020-04-18 11:39:49,241 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 18 [2020-04-18 11:39:49,731 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 17 [2020-04-18 11:39:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:39:49,890 INFO L93 Difference]: Finished difference Result 143 states and 230 transitions. [2020-04-18 11:39:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 230 transitions. [2020-04-18 11:39:49,891 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:39:49,891 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [643417534] [2020-04-18 11:39:49,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:39:49,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:39:49,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [643417534] [2020-04-18 11:39:49,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-04-18 11:39:49,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:39:49,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-04-18 11:39:49,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2727, Invalid=29493, Unknown=0, NotChecked=0, Total=32220 [2020-04-18 11:39:49,894 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand 92 states. [2020-04-18 11:39:50,356 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 15 [2020-04-18 11:39:50,588 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 17 [2020-04-18 11:39:51,135 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 24 [2020-04-18 11:39:51,584 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:52,034 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:52,485 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:53,123 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:53,571 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:54,020 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:54,472 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:54,928 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:55,375 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:55,971 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:56,432 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:56,884 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:57,333 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:57,783 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:58,238 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:58,696 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:59,149 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:39:59,630 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:00,083 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:00,540 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:00,987 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:01,455 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:01,918 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:02,368 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:02,827 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:03,308 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:03,768 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:04,220 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:04,673 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:05,133 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:05,590 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:06,045 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:06,525 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:06,994 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:07,431 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:07,877 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:08,329 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:08,783 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:09,240 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:09,704 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 25 [2020-04-18 11:40:10,185 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 24 [2020-04-18 11:40:10,621 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 23 [2020-04-18 11:40:11,295 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 22 [2020-04-18 11:40:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:40:11,373 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2020-04-18 11:40:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-04-18 11:40:11,373 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 49 [2020-04-18 11:40:11,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:40:11,374 INFO L225 Difference]: With dead ends: 96 [2020-04-18 11:40:11,374 INFO L226 Difference]: Without dead ends: 0 [2020-04-18 11:40:11,377 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16779 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=5682, Invalid=67488, Unknown=0, NotChecked=0, Total=73170 [2020-04-18 11:40:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-18 11:40:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-18 11:40:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-18 11:40:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-18 11:40:11,378 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-04-18 11:40:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:40:11,378 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-18 11:40:11,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-04-18 11:40:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-18 11:40:11,378 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:40:11,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:40:11,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 11:40:11 BasicIcfg [2020-04-18 11:40:11,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 11:40:11,586 INFO L168 Benchmark]: Toolchain (without parser) took 125137.06 ms. Allocated memory was 135.3 MB in the beginning and 720.9 MB in the end (delta: 585.6 MB). Free memory was 97.1 MB in the beginning and 408.5 MB in the end (delta: -311.4 MB). Peak memory consumption was 274.3 MB. Max. memory is 7.1 GB. [2020-04-18 11:40:11,586 INFO L168 Benchmark]: CDTParser took 1.35 ms. Allocated memory is still 135.3 MB. Free memory was 117.2 MB in the beginning and 116.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-04-18 11:40:11,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.94 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 95.1 MB in the beginning and 158.0 MB in the end (delta: -62.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-04-18 11:40:11,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.76 ms. Allocated memory is still 199.8 MB. Free memory was 158.0 MB in the beginning and 155.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-04-18 11:40:11,587 INFO L168 Benchmark]: Boogie Preprocessor took 27.77 ms. Allocated memory is still 199.8 MB. Free memory was 155.9 MB in the beginning and 154.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 11:40:11,588 INFO L168 Benchmark]: RCFGBuilder took 461.40 ms. Allocated memory is still 199.8 MB. Free memory was 154.4 MB in the beginning and 133.0 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-04-18 11:40:11,588 INFO L168 Benchmark]: TraceAbstraction took 123845.10 ms. Allocated memory was 199.8 MB in the beginning and 720.9 MB in the end (delta: 521.1 MB). Free memory was 133.0 MB in the beginning and 408.5 MB in the end (delta: -275.5 MB). Peak memory consumption was 245.7 MB. Max. memory is 7.1 GB. [2020-04-18 11:40:11,590 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.35 ms. Allocated memory is still 135.3 MB. Free memory was 117.2 MB in the beginning and 116.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 731.94 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 95.1 MB in the beginning and 158.0 MB in the end (delta: -62.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.76 ms. Allocated memory is still 199.8 MB. Free memory was 158.0 MB in the beginning and 155.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.77 ms. Allocated memory is still 199.8 MB. Free memory was 155.9 MB in the beginning and 154.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 461.40 ms. Allocated memory is still 199.8 MB. Free memory was 154.4 MB in the beginning and 133.0 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 123845.10 ms. Allocated memory was 199.8 MB in the beginning and 720.9 MB in the end (delta: 521.1 MB). Free memory was 133.0 MB in the beginning and 408.5 MB in the end (delta: -275.5 MB). Peak memory consumption was 245.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.0s, 58 ProgramPointsBefore, 14 ProgramPointsAfterwards, 59 TransitionsBefore, 12 TransitionsAfterwards, 352 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 190 VarBasedMoverChecksPositive, 9 VarBasedMoverChecksNegative, 3 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 294 CheckedPairsTotal, 50 TotalNumberOfCompositions - PositiveResult [Line: 695]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 123.7s, OverallIterations: 45, TraceHistogramMax: 43, AutomataDifference: 26.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 390 SDtfs, 2428 SDslu, 5715 SDs, 0 SdLazy, 10964 SolverSat, 1129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5245 GetRequests, 3355 SyntacticMatches, 2 SemanticMatches, 1888 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26187 ImplicationChecksByTransitivity, 56.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=44, 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, 45 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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 proved your program to be correct! Received shutdown request...