/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 15:15:23,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 15:15:23,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 15:15:23,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 15:15:23,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 15:15:23,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 15:15:23,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 15:15:23,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 15:15:23,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 15:15:23,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 15:15:23,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 15:15:23,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 15:15:23,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 15:15:23,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 15:15:23,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 15:15:23,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 15:15:23,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 15:15:23,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 15:15:23,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 15:15:23,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 15:15:23,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 15:15:23,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 15:15:23,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 15:15:23,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 15:15:23,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 15:15:23,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 15:15:23,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 15:15:23,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 15:15:23,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 15:15:23,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 15:15:23,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 15:15:23,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 15:15:23,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 15:15:23,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 15:15:23,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 15:15:23,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 15:15:23,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 15:15:23,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 15:15:23,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 15:15:23,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 15:15:23,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 15:15:23,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf [2020-04-18 15:15:23,172 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 15:15:23,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 15:15:23,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 15:15:23,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 15:15:23,174 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 15:15:23,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 15:15:23,175 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 15:15:23,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 15:15:23,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 15:15:23,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 15:15:23,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 15:15:23,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 15:15:23,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 15:15:23,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 15:15:23,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 15:15:23,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 15:15:23,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 15:15:23,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 15:15:23,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 15:15:23,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 15:15:23,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 15:15:23,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 15:15:23,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 15:15:23,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 15:15:23,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 15:15:23,178 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 15:15:23,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 15:15:23,179 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 15:15:23,179 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 15:15:23,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 15:15:23,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 15:15:23,472 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 15:15:23,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 15:15:23,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 15:15:23,494 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 15:15:23,495 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 15:15:23,497 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_tso.opt.i [2020-04-18 15:15:23,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08edd5767/e6069cbb3a4c48528ae642e8d2d335a3/FLAG7a9b7808a [2020-04-18 15:15:24,138 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 15:15:24,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_tso.opt.i [2020-04-18 15:15:24,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08edd5767/e6069cbb3a4c48528ae642e8d2d335a3/FLAG7a9b7808a [2020-04-18 15:15:24,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08edd5767/e6069cbb3a4c48528ae642e8d2d335a3 [2020-04-18 15:15:24,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 15:15:24,440 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 15:15:24,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 15:15:24,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 15:15:24,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 15:15:24,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:15:24" (1/1) ... [2020-04-18 15:15:24,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b8ec48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:24, skipping insertion in model container [2020-04-18 15:15:24,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:15:24" (1/1) ... [2020-04-18 15:15:24,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 15:15:24,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 15:15:25,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 15:15:25,034 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 15:15:25,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 15:15:25,192 INFO L208 MainTranslator]: Completed translation [2020-04-18 15:15:25,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25 WrapperNode [2020-04-18 15:15:25,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 15:15:25,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 15:15:25,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 15:15:25,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 15:15:25,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (1/1) ... [2020-04-18 15:15:25,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (1/1) ... [2020-04-18 15:15:25,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 15:15:25,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 15:15:25,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 15:15:25,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 15:15:25,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (1/1) ... [2020-04-18 15:15:25,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (1/1) ... [2020-04-18 15:15:25,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (1/1) ... [2020-04-18 15:15:25,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (1/1) ... [2020-04-18 15:15:25,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (1/1) ... [2020-04-18 15:15:25,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (1/1) ... [2020-04-18 15:15:25,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (1/1) ... [2020-04-18 15:15:25,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 15:15:25,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 15:15:25,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 15:15:25,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 15:15:25,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (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 15:15:25,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 15:15:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 15:15:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 15:15:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 15:15:25,342 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-04-18 15:15:25,342 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-04-18 15:15:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-04-18 15:15:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-04-18 15:15:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-04-18 15:15:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-04-18 15:15:25,343 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2020-04-18 15:15:25,343 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2020-04-18 15:15:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 15:15:25,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 15:15:25,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 15:15:25,346 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 15:15:25,746 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 15:15:25,746 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-04-18 15:15:25,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:15:25 BoogieIcfgContainer [2020-04-18 15:15:25,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 15:15:25,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 15:15:25,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 15:15:25,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 15:15:25,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:15:24" (1/3) ... [2020-04-18 15:15:25,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3716d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:15:25, skipping insertion in model container [2020-04-18 15:15:25,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:15:25" (2/3) ... [2020-04-18 15:15:25,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3716d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:15:25, skipping insertion in model container [2020-04-18 15:15:25,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:15:25" (3/3) ... [2020-04-18 15:15:25,760 INFO L109 eAbstractionObserver]: Analyzing ICFG safe016_tso.opt.i [2020-04-18 15:15:25,770 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 15:15:25,770 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 15:15:25,777 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 15:15:25,778 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 15:15:25,807 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,808 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,808 WARN L315 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,808 WARN L315 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,809 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,809 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,810 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,810 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,810 WARN L315 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,810 WARN L315 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,811 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,811 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,812 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,812 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,812 WARN L315 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,812 WARN L315 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,813 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,814 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,814 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,814 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,815 WARN L315 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,815 WARN L315 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,815 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,816 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,820 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,821 WARN L315 ript$VariableManager]: TermVariabe |P3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,821 WARN L315 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,821 WARN L315 ript$VariableManager]: TermVariabe P3Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,828 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,828 WARN L315 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,829 WARN L315 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,829 WARN L315 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,832 WARN L315 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,832 WARN L315 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,832 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,833 WARN L315 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,836 WARN L315 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,836 WARN L315 ript$VariableManager]: TermVariabe P2Thread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,836 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,837 WARN L315 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 15:15:25,854 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-04-18 15:15:25,875 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 15:15:25,875 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 15:15:25,875 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 15:15:25,876 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 15:15:25,876 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 15:15:25,876 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 15:15:25,876 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 15:15:25,876 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 15:15:25,894 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 80 transitions, 180 flow [2020-04-18 15:15:25,896 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 80 transitions, 180 flow [2020-04-18 15:15:25,941 INFO L129 PetriNetUnfolder]: 2/76 cut-off events. [2020-04-18 15:15:25,942 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 15:15:25,947 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 2/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2020-04-18 15:15:25,951 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 80 transitions, 180 flow [2020-04-18 15:15:25,975 INFO L129 PetriNetUnfolder]: 2/76 cut-off events. [2020-04-18 15:15:25,976 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 15:15:25,977 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 2/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2020-04-18 15:15:25,980 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1822 [2020-04-18 15:15:25,981 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 15:15:27,307 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-04-18 15:15:27,408 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2895 [2020-04-18 15:15:27,408 INFO L214 etLargeBlockEncoding]: Total number of compositions: 62 [2020-04-18 15:15:27,413 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 27 transitions, 74 flow [2020-04-18 15:15:27,508 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 850 states. [2020-04-18 15:15:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states. [2020-04-18 15:15:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 15:15:27,526 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:27,528 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:27,528 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:27,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1118879254, now seen corresponding path program 1 times [2020-04-18 15:15:27,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:27,544 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [216951889] [2020-04-18 15:15:27,562 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:27,576 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-04-18 15:15:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-04-18 15:15:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 15:15:27,579 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1118879254, now seen corresponding path program 2 times [2020-04-18 15:15:27,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:27,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952559269] [2020-04-18 15:15:27,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:27,805 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 15:15:27,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952559269] [2020-04-18 15:15:27,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:27,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:15:27,811 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:27,813 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:27,817 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 10 transitions. [2020-04-18 15:15:27,818 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:27,824 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:27,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-04-18 15:15:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 15:15:27,830 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-04-18 15:15:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:27,835 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2020-04-18 15:15:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2020-04-18 15:15:27,840 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:27,841 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [216951889] [2020-04-18 15:15:27,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:27,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:15:27,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [216951889] [2020-04-18 15:15:27,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-04-18 15:15:27,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:27,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-04-18 15:15:27,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 15:15:27,858 INFO L87 Difference]: Start difference. First operand 850 states. Second operand 2 states. [2020-04-18 15:15:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:27,914 INFO L93 Difference]: Finished difference Result 850 states and 2994 transitions. [2020-04-18 15:15:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-04-18 15:15:27,918 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-04-18 15:15:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:27,959 INFO L225 Difference]: With dead ends: 850 [2020-04-18 15:15:27,960 INFO L226 Difference]: Without dead ends: 706 [2020-04-18 15:15:27,961 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 15:15:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2020-04-18 15:15:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 706. [2020-04-18 15:15:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-04-18 15:15:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2442 transitions. [2020-04-18 15:15:28,099 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2442 transitions. Word has length 10 [2020-04-18 15:15:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:28,100 INFO L479 AbstractCegarLoop]: Abstraction has 706 states and 2442 transitions. [2020-04-18 15:15:28,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-04-18 15:15:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2442 transitions. [2020-04-18 15:15:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 15:15:28,103 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:28,103 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:28,103 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -325524913, now seen corresponding path program 1 times [2020-04-18 15:15:28,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:28,104 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1011015324] [2020-04-18 15:15:28,105 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:28,106 INFO L259 McrAutomatonBuilder]: Finished intersection with 12 states and 11 transitions. [2020-04-18 15:15:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-04-18 15:15:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 15:15:28,107 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:28,108 INFO L82 PathProgramCache]: Analyzing trace with hash -325524913, now seen corresponding path program 2 times [2020-04-18 15:15:28,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:28,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870511643] [2020-04-18 15:15:28,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:28,263 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 15:15:28,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870511643] [2020-04-18 15:15:28,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:28,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:15:28,264 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:28,265 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:28,266 INFO L259 McrAutomatonBuilder]: Finished intersection with 12 states and 11 transitions. [2020-04-18 15:15:28,267 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:28,280 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:28,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:28,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:15:28,281 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2020-04-18 15:15:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:28,300 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2020-04-18 15:15:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2020-04-18 15:15:28,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:28,301 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1011015324] [2020-04-18 15:15:28,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:28,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:15:28,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1011015324] [2020-04-18 15:15:28,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 15:15:28,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:28,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:28,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 15:15:28,303 INFO L87 Difference]: Start difference. First operand 706 states and 2442 transitions. Second operand 4 states. [2020-04-18 15:15:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:28,340 INFO L93 Difference]: Finished difference Result 802 states and 2662 transitions. [2020-04-18 15:15:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 15:15:28,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-04-18 15:15:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:28,346 INFO L225 Difference]: With dead ends: 802 [2020-04-18 15:15:28,347 INFO L226 Difference]: Without dead ends: 658 [2020-04-18 15:15:28,348 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 15:15:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-04-18 15:15:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2020-04-18 15:15:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-04-18 15:15:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2230 transitions. [2020-04-18 15:15:28,378 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2230 transitions. Word has length 11 [2020-04-18 15:15:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:28,379 INFO L479 AbstractCegarLoop]: Abstraction has 658 states and 2230 transitions. [2020-04-18 15:15:28,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 15:15:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2230 transitions. [2020-04-18 15:15:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 15:15:28,381 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:28,381 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:28,381 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:28,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1502334909, now seen corresponding path program 1 times [2020-04-18 15:15:28,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:28,382 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1865986087] [2020-04-18 15:15:28,383 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:28,383 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 18 transitions. [2020-04-18 15:15:28,384 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 15:15:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 15:15:28,384 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:28,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1502334909, now seen corresponding path program 2 times [2020-04-18 15:15:28,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:28,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737855769] [2020-04-18 15:15:28,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:28,473 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 15:15:28,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737855769] [2020-04-18 15:15:28,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:28,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:15:28,475 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:28,476 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:28,478 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 14 transitions. [2020-04-18 15:15:28,478 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:28,489 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:28,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:15:28,489 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-04-18 15:15:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:28,500 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-04-18 15:15:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-04-18 15:15:28,501 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:28,501 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1865986087] [2020-04-18 15:15:28,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:28,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:15:28,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1865986087] [2020-04-18 15:15:28,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 15:15:28,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:28,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:28,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 15:15:28,503 INFO L87 Difference]: Start difference. First operand 658 states and 2230 transitions. Second operand 4 states. [2020-04-18 15:15:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:28,532 INFO L93 Difference]: Finished difference Result 738 states and 2404 transitions. [2020-04-18 15:15:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 15:15:28,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-04-18 15:15:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:28,538 INFO L225 Difference]: With dead ends: 738 [2020-04-18 15:15:28,538 INFO L226 Difference]: Without dead ends: 618 [2020-04-18 15:15:28,539 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 15:15:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-04-18 15:15:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2020-04-18 15:15:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-04-18 15:15:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 2058 transitions. [2020-04-18 15:15:28,561 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 2058 transitions. Word has length 12 [2020-04-18 15:15:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:28,562 INFO L479 AbstractCegarLoop]: Abstraction has 618 states and 2058 transitions. [2020-04-18 15:15:28,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 15:15:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 2058 transitions. [2020-04-18 15:15:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 15:15:28,563 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:28,563 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:28,564 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash 672248787, now seen corresponding path program 1 times [2020-04-18 15:15:28,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:28,565 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1979106142] [2020-04-18 15:15:28,565 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:28,566 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 44 transitions. [2020-04-18 15:15:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-04-18 15:15:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 15:15:28,567 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:28,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:28,567 INFO L82 PathProgramCache]: Analyzing trace with hash 672258297, now seen corresponding path program 2 times [2020-04-18 15:15:28,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:28,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239149823] [2020-04-18 15:15:28,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:28,669 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 15:15:28,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239149823] [2020-04-18 15:15:28,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:28,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:28,670 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:28,675 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:28,678 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 17 transitions. [2020-04-18 15:15:28,679 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:28,689 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:28,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:15:28,690 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-04-18 15:15:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:28,709 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2020-04-18 15:15:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 48 transitions. [2020-04-18 15:15:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 15:15:28,710 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:15:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:28,711 INFO L82 PathProgramCache]: Analyzing trace with hash 672248787, now seen corresponding path program 3 times [2020-04-18 15:15:28,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:28,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573360272] [2020-04-18 15:15:28,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:28,832 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 15:15:28,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573360272] [2020-04-18 15:15:28,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:28,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:15:28,834 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:28,836 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:28,839 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 15:15:28,839 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:28,848 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-18 15:15:28,849 INFO L87 Difference]: Start difference. First operand 32 states and 48 transitions. Second operand 4 states. [2020-04-18 15:15:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:28,863 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2020-04-18 15:15:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 48 transitions. [2020-04-18 15:15:28,863 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:28,864 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1979106142] [2020-04-18 15:15:28,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:28,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:15:28,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1979106142] [2020-04-18 15:15:28,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-18 15:15:28,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:28,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:15:28,866 INFO L87 Difference]: Start difference. First operand 618 states and 2058 transitions. Second operand 5 states. [2020-04-18 15:15:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:28,918 INFO L93 Difference]: Finished difference Result 978 states and 3156 transitions. [2020-04-18 15:15:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-18 15:15:28,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-04-18 15:15:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:28,924 INFO L225 Difference]: With dead ends: 978 [2020-04-18 15:15:28,924 INFO L226 Difference]: Without dead ends: 530 [2020-04-18 15:15:28,924 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-04-18 15:15:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-04-18 15:15:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 530. [2020-04-18 15:15:28,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2020-04-18 15:15:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1708 transitions. [2020-04-18 15:15:28,946 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1708 transitions. Word has length 13 [2020-04-18 15:15:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:28,946 INFO L479 AbstractCegarLoop]: Abstraction has 530 states and 1708 transitions. [2020-04-18 15:15:28,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-18 15:15:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1708 transitions. [2020-04-18 15:15:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 15:15:28,948 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:28,948 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:28,948 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash -635139139, now seen corresponding path program 1 times [2020-04-18 15:15:28,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:28,949 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [11930985] [2020-04-18 15:15:28,950 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:28,951 INFO L259 McrAutomatonBuilder]: Finished intersection with 48 states and 98 transitions. [2020-04-18 15:15:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-04-18 15:15:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 15:15:28,953 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1106285121, now seen corresponding path program 2 times [2020-04-18 15:15:28,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:28,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788700296] [2020-04-18 15:15:28,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:29,028 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 15:15:29,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788700296] [2020-04-18 15:15:29,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:29,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:29,031 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:29,033 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,036 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 15:15:29,039 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:29,052 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:29,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:29,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:15:29,053 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2020-04-18 15:15:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:29,074 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2020-04-18 15:15:29,074 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 110 transitions. [2020-04-18 15:15:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 15:15:29,075 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:15:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:29,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1106275611, now seen corresponding path program 3 times [2020-04-18 15:15:29,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:29,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450531817] [2020-04-18 15:15:29,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:29,131 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 15:15:29,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450531817] [2020-04-18 15:15:29,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:29,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 15:15:29,132 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:29,134 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,137 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 38 transitions. [2020-04-18 15:15:29,137 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:29,144 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:29,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-18 15:15:29,145 INFO L87 Difference]: Start difference. First operand 56 states and 110 transitions. Second operand 4 states. [2020-04-18 15:15:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:29,157 INFO L93 Difference]: Finished difference Result 56 states and 110 transitions. [2020-04-18 15:15:29,157 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 110 transitions. [2020-04-18 15:15:29,158 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:29,158 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [11930985] [2020-04-18 15:15:29,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:29,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 15:15:29,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [11930985] [2020-04-18 15:15:29,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-18 15:15:29,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:29,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:15:29,160 INFO L87 Difference]: Start difference. First operand 530 states and 1708 transitions. Second operand 5 states. [2020-04-18 15:15:29,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:29,189 INFO L93 Difference]: Finished difference Result 562 states and 1764 transitions. [2020-04-18 15:15:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 15:15:29,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-04-18 15:15:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:29,194 INFO L225 Difference]: With dead ends: 562 [2020-04-18 15:15:29,194 INFO L226 Difference]: Without dead ends: 498 [2020-04-18 15:15:29,195 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-04-18 15:15:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-04-18 15:15:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2020-04-18 15:15:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-04-18 15:15:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1588 transitions. [2020-04-18 15:15:29,216 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1588 transitions. Word has length 14 [2020-04-18 15:15:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:29,217 INFO L479 AbstractCegarLoop]: Abstraction has 498 states and 1588 transitions. [2020-04-18 15:15:29,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-18 15:15:29,217 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1588 transitions. [2020-04-18 15:15:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:15:29,218 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:29,219 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:29,219 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:29,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1533442537, now seen corresponding path program 1 times [2020-04-18 15:15:29,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:29,220 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [343383680] [2020-04-18 15:15:29,221 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,222 INFO L259 McrAutomatonBuilder]: Finished intersection with 68 states and 139 transitions. [2020-04-18 15:15:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-04-18 15:15:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:15:29,224 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:29,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1533442537, now seen corresponding path program 2 times [2020-04-18 15:15:29,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:29,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198194454] [2020-04-18 15:15:29,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:29,301 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 15:15:29,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198194454] [2020-04-18 15:15:29,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:29,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:29,302 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:29,305 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,308 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 55 transitions. [2020-04-18 15:15:29,309 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:29,367 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:15:29,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:15:29,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 15:15:29,367 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 6 states. [2020-04-18 15:15:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:29,424 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2020-04-18 15:15:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 165 transitions. [2020-04-18 15:15:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:15:29,425 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:15:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash 350276811, now seen corresponding path program 3 times [2020-04-18 15:15:29,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:29,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030497684] [2020-04-18 15:15:29,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:29,466 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 15:15:29,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030497684] [2020-04-18 15:15:29,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:29,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:29,467 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:29,468 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,471 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 54 transitions. [2020-04-18 15:15:29,472 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:29,494 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:29,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:29,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-04-18 15:15:29,494 INFO L87 Difference]: Start difference. First operand 88 states and 165 transitions. Second operand 4 states. [2020-04-18 15:15:29,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:29,514 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2020-04-18 15:15:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 165 transitions. [2020-04-18 15:15:29,515 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:29,515 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [343383680] [2020-04-18 15:15:29,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:29,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 15:15:29,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [343383680] [2020-04-18 15:15:29,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 15:15:29,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:29,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:15:29,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-18 15:15:29,517 INFO L87 Difference]: Start difference. First operand 498 states and 1588 transitions. Second operand 7 states. [2020-04-18 15:15:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:29,584 INFO L93 Difference]: Finished difference Result 970 states and 2936 transitions. [2020-04-18 15:15:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 15:15:29,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-04-18 15:15:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:29,589 INFO L225 Difference]: With dead ends: 970 [2020-04-18 15:15:29,589 INFO L226 Difference]: Without dead ends: 482 [2020-04-18 15:15:29,589 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-04-18 15:15:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-04-18 15:15:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 418. [2020-04-18 15:15:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-04-18 15:15:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1226 transitions. [2020-04-18 15:15:29,604 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1226 transitions. Word has length 15 [2020-04-18 15:15:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:29,604 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 1226 transitions. [2020-04-18 15:15:29,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 15:15:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1226 transitions. [2020-04-18 15:15:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:15:29,605 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:29,606 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:29,606 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:29,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1081767860, now seen corresponding path program 1 times [2020-04-18 15:15:29,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:29,607 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1454993050] [2020-04-18 15:15:29,607 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,609 INFO L259 McrAutomatonBuilder]: Finished intersection with 94 states and 240 transitions. [2020-04-18 15:15:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-04-18 15:15:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:15:29,610 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:29,611 INFO L82 PathProgramCache]: Analyzing trace with hash 659656400, now seen corresponding path program 2 times [2020-04-18 15:15:29,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:29,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283895625] [2020-04-18 15:15:29,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:29,647 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 15:15:29,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283895625] [2020-04-18 15:15:29,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:29,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:29,650 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:29,651 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,675 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 55 transitions. [2020-04-18 15:15:29,675 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:29,685 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:29,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:29,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:15:29,686 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2020-04-18 15:15:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:29,703 INFO L93 Difference]: Finished difference Result 110 states and 272 transitions. [2020-04-18 15:15:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 272 transitions. [2020-04-18 15:15:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:15:29,704 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:15:29,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:29,704 INFO L82 PathProgramCache]: Analyzing trace with hash 659646890, now seen corresponding path program 3 times [2020-04-18 15:15:29,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:29,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481290358] [2020-04-18 15:15:29,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:29,750 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 15:15:29,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481290358] [2020-04-18 15:15:29,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:29,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:29,751 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:29,752 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,757 INFO L259 McrAutomatonBuilder]: Finished intersection with 42 states and 75 transitions. [2020-04-18 15:15:29,757 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:29,772 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:29,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:29,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:15:29,773 INFO L87 Difference]: Start difference. First operand 110 states and 272 transitions. Second operand 5 states. [2020-04-18 15:15:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:29,821 INFO L93 Difference]: Finished difference Result 136 states and 315 transitions. [2020-04-18 15:15:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 315 transitions. [2020-04-18 15:15:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:15:29,822 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 15:15:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash -96752386, now seen corresponding path program 4 times [2020-04-18 15:15:29,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:29,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046943631] [2020-04-18 15:15:29,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:29,860 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 15:15:29,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046943631] [2020-04-18 15:15:29,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:29,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:29,862 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:29,863 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,867 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 51 transitions. [2020-04-18 15:15:29,867 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:29,898 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:15:29,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:15:29,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-18 15:15:29,899 INFO L87 Difference]: Start difference. First operand 136 states and 315 transitions. Second operand 6 states. [2020-04-18 15:15:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:29,951 INFO L93 Difference]: Finished difference Result 173 states and 373 transitions. [2020-04-18 15:15:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 373 transitions. [2020-04-18 15:15:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 15:15:29,952 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 15:15:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash 807678122, now seen corresponding path program 5 times [2020-04-18 15:15:29,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:29,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528106139] [2020-04-18 15:15:29,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:29,992 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 15:15:29,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528106139] [2020-04-18 15:15:29,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:29,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:29,993 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:29,994 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:29,998 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 55 transitions. [2020-04-18 15:15:29,998 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:30,031 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 15:15:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-18 15:15:30,032 INFO L87 Difference]: Start difference. First operand 173 states and 373 transitions. Second operand 4 states. [2020-04-18 15:15:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:30,048 INFO L93 Difference]: Finished difference Result 173 states and 373 transitions. [2020-04-18 15:15:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 373 transitions. [2020-04-18 15:15:30,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:30,049 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1454993050] [2020-04-18 15:15:30,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:30,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 15:15:30,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1454993050] [2020-04-18 15:15:30,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-18 15:15:30,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:30,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 15:15:30,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-18 15:15:30,051 INFO L87 Difference]: Start difference. First operand 418 states and 1226 transitions. Second operand 10 states. [2020-04-18 15:15:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:30,559 INFO L93 Difference]: Finished difference Result 703 states and 1870 transitions. [2020-04-18 15:15:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-18 15:15:30,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-04-18 15:15:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:30,562 INFO L225 Difference]: With dead ends: 703 [2020-04-18 15:15:30,562 INFO L226 Difference]: Without dead ends: 271 [2020-04-18 15:15:30,563 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=373, Invalid=1519, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 15:15:30,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-04-18 15:15:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-04-18 15:15:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-04-18 15:15:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 731 transitions. [2020-04-18 15:15:30,571 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 731 transitions. Word has length 15 [2020-04-18 15:15:30,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:30,572 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 731 transitions. [2020-04-18 15:15:30,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-18 15:15:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 731 transitions. [2020-04-18 15:15:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 15:15:30,573 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:30,573 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:30,573 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:30,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1481069530, now seen corresponding path program 1 times [2020-04-18 15:15:30,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:30,574 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [762643932] [2020-04-18 15:15:30,575 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:30,577 INFO L259 McrAutomatonBuilder]: Finished intersection with 138 states and 378 transitions. [2020-04-18 15:15:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states. [2020-04-18 15:15:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 15:15:30,579 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1025487846, now seen corresponding path program 2 times [2020-04-18 15:15:30,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:30,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497266934] [2020-04-18 15:15:30,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:30,615 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 15:15:30,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497266934] [2020-04-18 15:15:30,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:30,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:30,616 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:30,618 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:30,623 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 58 transitions. [2020-04-18 15:15:30,623 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:30,634 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:30,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:30,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:15:30,635 INFO L87 Difference]: Start difference. First operand 138 states. Second operand 4 states. [2020-04-18 15:15:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:30,654 INFO L93 Difference]: Finished difference Result 170 states and 458 transitions. [2020-04-18 15:15:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 458 transitions. [2020-04-18 15:15:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 15:15:30,655 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:15:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:30,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1025782656, now seen corresponding path program 3 times [2020-04-18 15:15:30,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:30,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914500226] [2020-04-18 15:15:30,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:30,705 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 15:15:30,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914500226] [2020-04-18 15:15:30,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:30,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:30,706 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:30,708 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:30,715 INFO L259 McrAutomatonBuilder]: Finished intersection with 47 states and 84 transitions. [2020-04-18 15:15:30,715 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:30,730 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:30,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:30,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:15:30,731 INFO L87 Difference]: Start difference. First operand 170 states and 458 transitions. Second operand 5 states. [2020-04-18 15:15:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:30,803 INFO L93 Difference]: Finished difference Result 212 states and 537 transitions. [2020-04-18 15:15:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2020-04-18 15:15:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 15:15:30,805 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 15:15:30,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:30,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1295643564, now seen corresponding path program 4 times [2020-04-18 15:15:30,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:30,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889925060] [2020-04-18 15:15:30,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:30,860 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 15:15:30,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889925060] [2020-04-18 15:15:30,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:30,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:30,865 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:30,866 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:30,870 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 60 transitions. [2020-04-18 15:15:30,871 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:30,904 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:15:30,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:15:30,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-18 15:15:30,905 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 6 states. [2020-04-18 15:15:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:30,965 INFO L93 Difference]: Finished difference Result 286 states and 690 transitions. [2020-04-18 15:15:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 690 transitions. [2020-04-18 15:15:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 15:15:30,966 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 15:15:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:30,966 INFO L82 PathProgramCache]: Analyzing trace with hash -731781760, now seen corresponding path program 5 times [2020-04-18 15:15:30,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:30,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256422009] [2020-04-18 15:15:30,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:31,008 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 15:15:31,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256422009] [2020-04-18 15:15:31,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:31,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:31,009 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:31,010 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:31,015 INFO L259 McrAutomatonBuilder]: Finished intersection with 42 states and 72 transitions. [2020-04-18 15:15:31,016 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:31,043 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 15:15:31,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:31,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-18 15:15:31,044 INFO L87 Difference]: Start difference. First operand 286 states and 690 transitions. Second operand 4 states. [2020-04-18 15:15:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:31,065 INFO L93 Difference]: Finished difference Result 340 states and 785 transitions. [2020-04-18 15:15:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 785 transitions. [2020-04-18 15:15:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 15:15:31,067 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 15:15:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1481069530, now seen corresponding path program 6 times [2020-04-18 15:15:31,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:31,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528912882] [2020-04-18 15:15:31,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:31,133 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 15:15:31,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528912882] [2020-04-18 15:15:31,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:31,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:31,134 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:31,136 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:31,141 INFO L259 McrAutomatonBuilder]: Finished intersection with 43 states and 74 transitions. [2020-04-18 15:15:31,141 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:31,232 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 15:15:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:15:31,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-04-18 15:15:31,232 INFO L87 Difference]: Start difference. First operand 340 states and 785 transitions. Second operand 7 states. [2020-04-18 15:15:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:31,253 INFO L93 Difference]: Finished difference Result 340 states and 785 transitions. [2020-04-18 15:15:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 785 transitions. [2020-04-18 15:15:31,255 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:31,255 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [762643932] [2020-04-18 15:15:31,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:31,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 15:15:31,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [762643932] [2020-04-18 15:15:31,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-18 15:15:31,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 15:15:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-04-18 15:15:31,257 INFO L87 Difference]: Start difference. First operand 271 states and 731 transitions. Second operand 13 states. [2020-04-18 15:15:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:31,753 INFO L93 Difference]: Finished difference Result 269 states and 645 transitions. [2020-04-18 15:15:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-18 15:15:31,754 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-18 15:15:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:31,755 INFO L225 Difference]: With dead ends: 269 [2020-04-18 15:15:31,756 INFO L226 Difference]: Without dead ends: 201 [2020-04-18 15:15:31,757 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=424, Invalid=1832, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 15:15:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-04-18 15:15:31,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-04-18 15:15:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-04-18 15:15:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 474 transitions. [2020-04-18 15:15:31,763 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 474 transitions. Word has length 16 [2020-04-18 15:15:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:31,763 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 474 transitions. [2020-04-18 15:15:31,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-18 15:15:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 474 transitions. [2020-04-18 15:15:31,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:15:31,766 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:31,767 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:31,767 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:31,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1331262194, now seen corresponding path program 1 times [2020-04-18 15:15:31,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:31,768 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1107878665] [2020-04-18 15:15:31,769 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:31,772 INFO L259 McrAutomatonBuilder]: Finished intersection with 186 states and 542 transitions. [2020-04-18 15:15:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states. [2020-04-18 15:15:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:15:31,776 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:31,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1725351916, now seen corresponding path program 2 times [2020-04-18 15:15:31,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:31,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196269113] [2020-04-18 15:15:31,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:31,807 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 15:15:31,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196269113] [2020-04-18 15:15:31,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:31,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:31,808 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:31,810 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:31,815 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 61 transitions. [2020-04-18 15:15:31,815 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:31,825 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:31,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:31,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:15:31,825 INFO L87 Difference]: Start difference. First operand 186 states. Second operand 4 states. [2020-04-18 15:15:31,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:31,846 INFO L93 Difference]: Finished difference Result 234 states and 670 transitions. [2020-04-18 15:15:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 670 transitions. [2020-04-18 15:15:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:15:31,847 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:15:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:31,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1734491026, now seen corresponding path program 3 times [2020-04-18 15:15:31,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:31,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234935032] [2020-04-18 15:15:31,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:31,911 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 15:15:31,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234935032] [2020-04-18 15:15:31,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:31,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:31,912 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:31,914 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:31,922 INFO L259 McrAutomatonBuilder]: Finished intersection with 50 states and 89 transitions. [2020-04-18 15:15:31,922 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:31,936 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:31,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:31,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:15:31,937 INFO L87 Difference]: Start difference. First operand 234 states and 670 transitions. Second operand 5 states. [2020-04-18 15:15:31,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:31,982 INFO L93 Difference]: Finished difference Result 318 states and 870 transitions. [2020-04-18 15:15:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 870 transitions. [2020-04-18 15:15:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:15:31,983 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 15:15:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:31,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1510245058, now seen corresponding path program 4 times [2020-04-18 15:15:31,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:31,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469431734] [2020-04-18 15:15:31,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:32,035 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 15:15:32,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469431734] [2020-04-18 15:15:32,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:32,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:32,036 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:32,037 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:32,043 INFO L259 McrAutomatonBuilder]: Finished intersection with 41 states and 67 transitions. [2020-04-18 15:15:32,043 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:32,074 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:15:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:15:32,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-18 15:15:32,075 INFO L87 Difference]: Start difference. First operand 318 states and 870 transitions. Second operand 6 states. [2020-04-18 15:15:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:32,129 INFO L93 Difference]: Finished difference Result 434 states and 1134 transitions. [2020-04-18 15:15:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1134 transitions. [2020-04-18 15:15:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:15:32,130 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 15:15:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:32,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1210397842, now seen corresponding path program 5 times [2020-04-18 15:15:32,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:32,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428895021] [2020-04-18 15:15:32,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:32,161 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 15:15:32,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428895021] [2020-04-18 15:15:32,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:32,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 15:15:32,162 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:32,163 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:32,170 INFO L259 McrAutomatonBuilder]: Finished intersection with 48 states and 84 transitions. [2020-04-18 15:15:32,170 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:32,204 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 15:15:32,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:32,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-18 15:15:32,205 INFO L87 Difference]: Start difference. First operand 434 states and 1134 transitions. Second operand 4 states. [2020-04-18 15:15:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:32,234 INFO L93 Difference]: Finished difference Result 612 states and 1503 transitions. [2020-04-18 15:15:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1503 transitions. [2020-04-18 15:15:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:15:32,236 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 15:15:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1331485064, now seen corresponding path program 6 times [2020-04-18 15:15:32,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:32,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442569044] [2020-04-18 15:15:32,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:32,289 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 15:15:32,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442569044] [2020-04-18 15:15:32,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:32,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:32,290 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:32,291 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:32,297 INFO L259 McrAutomatonBuilder]: Finished intersection with 49 states and 86 transitions. [2020-04-18 15:15:32,297 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:32,402 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 15:15:32,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:15:32,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-04-18 15:15:32,403 INFO L87 Difference]: Start difference. First operand 612 states and 1503 transitions. Second operand 7 states. [2020-04-18 15:15:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:32,458 INFO L93 Difference]: Finished difference Result 646 states and 1548 transitions. [2020-04-18 15:15:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1548 transitions. [2020-04-18 15:15:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-18 15:15:32,460 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 15:15:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1331262194, now seen corresponding path program 7 times [2020-04-18 15:15:32,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:32,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322156841] [2020-04-18 15:15:32,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:32,508 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 15:15:32,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322156841] [2020-04-18 15:15:32,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:32,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-18 15:15:32,509 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:32,511 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:32,516 INFO L259 McrAutomatonBuilder]: Finished intersection with 45 states and 77 transitions. [2020-04-18 15:15:32,516 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:32,629 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 15:15:32,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 15:15:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-04-18 15:15:32,630 INFO L87 Difference]: Start difference. First operand 646 states and 1548 transitions. Second operand 8 states. [2020-04-18 15:15:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:32,703 INFO L93 Difference]: Finished difference Result 646 states and 1548 transitions. [2020-04-18 15:15:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1548 transitions. [2020-04-18 15:15:32,706 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:32,706 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1107878665] [2020-04-18 15:15:32,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:32,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 15:15:32,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1107878665] [2020-04-18 15:15:32,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 15:15:32,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:32,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 15:15:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-04-18 15:15:32,708 INFO L87 Difference]: Start difference. First operand 201 states and 474 transitions. Second operand 14 states. [2020-04-18 15:15:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:33,236 INFO L93 Difference]: Finished difference Result 178 states and 389 transitions. [2020-04-18 15:15:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-18 15:15:33,237 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-18 15:15:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:33,239 INFO L225 Difference]: With dead ends: 178 [2020-04-18 15:15:33,239 INFO L226 Difference]: Without dead ends: 144 [2020-04-18 15:15:33,241 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=389, Invalid=1773, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 15:15:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-18 15:15:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-04-18 15:15:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-18 15:15:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 314 transitions. [2020-04-18 15:15:33,245 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 314 transitions. Word has length 17 [2020-04-18 15:15:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:33,246 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 314 transitions. [2020-04-18 15:15:33,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 15:15:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 314 transitions. [2020-04-18 15:15:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:15:33,247 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:33,247 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:33,247 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:33,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1319799301, now seen corresponding path program 1 times [2020-04-18 15:15:33,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:33,248 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1194494337] [2020-04-18 15:15:33,248 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:33,255 INFO L259 McrAutomatonBuilder]: Finished intersection with 370 states and 1174 transitions. [2020-04-18 15:15:33,258 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states. [2020-04-18 15:15:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:15:33,260 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:33,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:33,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1539514913, now seen corresponding path program 2 times [2020-04-18 15:15:33,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:33,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864600342] [2020-04-18 15:15:33,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:33,326 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 15:15:33,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864600342] [2020-04-18 15:15:33,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:33,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:33,328 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:33,329 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:33,340 INFO L259 McrAutomatonBuilder]: Finished intersection with 94 states and 176 transitions. [2020-04-18 15:15:33,340 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:33,350 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:33,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 15:15:33,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 15:15:33,350 INFO L87 Difference]: Start difference. First operand 370 states. Second operand 4 states. [2020-04-18 15:15:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:33,378 INFO L93 Difference]: Finished difference Result 586 states and 1790 transitions. [2020-04-18 15:15:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1790 transitions. [2020-04-18 15:15:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:15:33,380 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:15:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:33,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1530375803, now seen corresponding path program 3 times [2020-04-18 15:15:33,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:33,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470656659] [2020-04-18 15:15:33,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:33,414 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 15:15:33,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470656659] [2020-04-18 15:15:33,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:33,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:33,415 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:33,416 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:33,426 INFO L259 McrAutomatonBuilder]: Finished intersection with 75 states and 140 transitions. [2020-04-18 15:15:33,426 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:33,439 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:33,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:33,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-18 15:15:33,440 INFO L87 Difference]: Start difference. First operand 586 states and 1790 transitions. Second operand 5 states. [2020-04-18 15:15:33,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:33,488 INFO L93 Difference]: Finished difference Result 910 states and 2754 transitions. [2020-04-18 15:15:33,488 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2754 transitions. [2020-04-18 15:15:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:15:33,490 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 15:15:33,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:33,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1344876367, now seen corresponding path program 4 times [2020-04-18 15:15:33,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:33,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245716303] [2020-04-18 15:15:33,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:33,538 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 15:15:33,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245716303] [2020-04-18 15:15:33,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:33,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:33,539 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:33,540 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:33,545 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2020-04-18 15:15:33,545 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:33,592 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:15:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:15:33,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-18 15:15:33,592 INFO L87 Difference]: Start difference. First operand 910 states and 2754 transitions. Second operand 6 states. [2020-04-18 15:15:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:33,658 INFO L93 Difference]: Finished difference Result 1414 states and 4042 transitions. [2020-04-18 15:15:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4042 transitions. [2020-04-18 15:15:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:15:33,662 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 15:15:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:33,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1192691597, now seen corresponding path program 5 times [2020-04-18 15:15:33,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:33,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254934769] [2020-04-18 15:15:33,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:33,701 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 15:15:33,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254934769] [2020-04-18 15:15:33,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:33,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-18 15:15:33,702 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:33,704 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:33,709 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2020-04-18 15:15:33,709 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:33,722 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 15:15:33,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:33,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-18 15:15:33,723 INFO L87 Difference]: Start difference. First operand 1414 states and 4042 transitions. Second operand 5 states. [2020-04-18 15:15:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:33,788 INFO L93 Difference]: Finished difference Result 1696 states and 4699 transitions. [2020-04-18 15:15:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4699 transitions. [2020-04-18 15:15:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:15:33,792 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 15:15:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1221860735, now seen corresponding path program 6 times [2020-04-18 15:15:33,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:33,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934074902] [2020-04-18 15:15:33,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:33,821 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 15:15:33,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934074902] [2020-04-18 15:15:33,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:33,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:33,822 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:33,824 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:33,829 INFO L259 McrAutomatonBuilder]: Finished intersection with 42 states and 61 transitions. [2020-04-18 15:15:33,829 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:33,886 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:33,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:33,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-04-18 15:15:33,887 INFO L87 Difference]: Start difference. First operand 1696 states and 4699 transitions. Second operand 5 states. [2020-04-18 15:15:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:33,977 INFO L93 Difference]: Finished difference Result 2041 states and 5296 transitions. [2020-04-18 15:15:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 5296 transitions. [2020-04-18 15:15:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:15:33,982 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 15:15:33,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:33,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1320022171, now seen corresponding path program 7 times [2020-04-18 15:15:33,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:33,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981475973] [2020-04-18 15:15:33,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:34,027 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 15:15:34,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981475973] [2020-04-18 15:15:34,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:34,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-18 15:15:34,028 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:34,029 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:34,035 INFO L259 McrAutomatonBuilder]: Finished intersection with 39 states and 55 transitions. [2020-04-18 15:15:34,035 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:34,054 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 15:15:34,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:15:34,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-04-18 15:15:34,055 INFO L87 Difference]: Start difference. First operand 2041 states and 5296 transitions. Second operand 6 states. [2020-04-18 15:15:34,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:34,149 INFO L93 Difference]: Finished difference Result 2091 states and 5344 transitions. [2020-04-18 15:15:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 5344 transitions. [2020-04-18 15:15:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-18 15:15:34,153 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 15:15:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1319799301, now seen corresponding path program 8 times [2020-04-18 15:15:34,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:34,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780981273] [2020-04-18 15:15:34,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:34,193 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 15:15:34,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780981273] [2020-04-18 15:15:34,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:34,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 15:15:34,195 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:34,196 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:34,202 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 51 transitions. [2020-04-18 15:15:34,202 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:34,223 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 15:15:34,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:15:34,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-04-18 15:15:34,224 INFO L87 Difference]: Start difference. First operand 2091 states and 5344 transitions. Second operand 7 states. [2020-04-18 15:15:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:34,315 INFO L93 Difference]: Finished difference Result 2091 states and 5344 transitions. [2020-04-18 15:15:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 5344 transitions. [2020-04-18 15:15:34,320 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:34,320 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1194494337] [2020-04-18 15:15:34,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:34,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 15:15:34,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1194494337] [2020-04-18 15:15:34,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 15:15:34,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:34,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 15:15:34,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2020-04-18 15:15:34,322 INFO L87 Difference]: Start difference. First operand 144 states and 314 transitions. Second operand 15 states. [2020-04-18 15:15:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:34,876 INFO L93 Difference]: Finished difference Result 133 states and 290 transitions. [2020-04-18 15:15:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 15:15:34,877 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-18 15:15:34,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:34,878 INFO L225 Difference]: With dead ends: 133 [2020-04-18 15:15:34,878 INFO L226 Difference]: Without dead ends: 52 [2020-04-18 15:15:34,880 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=2419, Unknown=0, NotChecked=0, Total=2862 [2020-04-18 15:15:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-18 15:15:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-04-18 15:15:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-18 15:15:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 98 transitions. [2020-04-18 15:15:34,882 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 98 transitions. Word has length 19 [2020-04-18 15:15:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:34,883 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 98 transitions. [2020-04-18 15:15:34,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 15:15:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 98 transitions. [2020-04-18 15:15:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:15:34,883 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 15:15:34,884 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 15:15:34,884 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 15:15:34,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:34,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2139262285, now seen corresponding path program 1 times [2020-04-18 15:15:34,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 15:15:34,884 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [140731570] [2020-04-18 15:15:34,885 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:34,897 INFO L259 McrAutomatonBuilder]: Finished intersection with 706 states and 2442 transitions. [2020-04-18 15:15:34,903 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states. [2020-04-18 15:15:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:15:34,905 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 15:15:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:34,906 INFO L82 PathProgramCache]: Analyzing trace with hash -101509511, now seen corresponding path program 2 times [2020-04-18 15:15:34,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:34,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245489942] [2020-04-18 15:15:34,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:34,944 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 15:15:34,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245489942] [2020-04-18 15:15:34,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:34,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:34,945 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:34,947 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:34,964 INFO L259 McrAutomatonBuilder]: Finished intersection with 123 states and 235 transitions. [2020-04-18 15:15:34,964 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:34,981 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 15:15:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:34,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 15:15:34,982 INFO L87 Difference]: Start difference. First operand 706 states. Second operand 5 states. [2020-04-18 15:15:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:35,031 INFO L93 Difference]: Finished difference Result 1192 states and 4089 transitions. [2020-04-18 15:15:35,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 4089 transitions. [2020-04-18 15:15:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:15:35,035 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 15:15:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:35,035 INFO L82 PathProgramCache]: Analyzing trace with hash 70279265, now seen corresponding path program 3 times [2020-04-18 15:15:35,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:35,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913050970] [2020-04-18 15:15:35,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:35,093 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 15:15:35,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913050970] [2020-04-18 15:15:35,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:35,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-18 15:15:35,094 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:35,096 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:35,108 INFO L259 McrAutomatonBuilder]: Finished intersection with 71 states and 120 transitions. [2020-04-18 15:15:35,108 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:35,169 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 15:15:35,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:15:35,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-04-18 15:15:35,170 INFO L87 Difference]: Start difference. First operand 1192 states and 4089 transitions. Second operand 7 states. [2020-04-18 15:15:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:35,274 INFO L93 Difference]: Finished difference Result 2332 states and 7681 transitions. [2020-04-18 15:15:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 7681 transitions. [2020-04-18 15:15:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:15:35,279 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 15:15:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash -300274125, now seen corresponding path program 4 times [2020-04-18 15:15:35,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:35,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564876195] [2020-04-18 15:15:35,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:35,317 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 15:15:35,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564876195] [2020-04-18 15:15:35,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:35,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:35,318 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:35,319 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:35,329 INFO L259 McrAutomatonBuilder]: Finished intersection with 63 states and 97 transitions. [2020-04-18 15:15:35,329 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:35,399 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 15:15:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:15:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-18 15:15:35,400 INFO L87 Difference]: Start difference. First operand 2332 states and 7681 transitions. Second operand 6 states. [2020-04-18 15:15:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:35,484 INFO L93 Difference]: Finished difference Result 4214 states and 13660 transitions. [2020-04-18 15:15:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4214 states and 13660 transitions. [2020-04-18 15:15:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:15:35,493 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 15:15:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1811866115, now seen corresponding path program 5 times [2020-04-18 15:15:35,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:35,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240230995] [2020-04-18 15:15:35,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:35,536 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 15:15:35,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240230995] [2020-04-18 15:15:35,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:35,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-18 15:15:35,537 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:35,539 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:35,549 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 67 transitions. [2020-04-18 15:15:35,550 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:35,586 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 15:15:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-04-18 15:15:35,587 INFO L87 Difference]: Start difference. First operand 4214 states and 13660 transitions. Second operand 5 states. [2020-04-18 15:15:35,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:35,751 INFO L93 Difference]: Finished difference Result 8010 states and 24924 transitions. [2020-04-18 15:15:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8010 states and 24924 transitions. [2020-04-18 15:15:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:15:35,765 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 15:15:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:35,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1728475435, now seen corresponding path program 6 times [2020-04-18 15:15:35,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:35,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762603090] [2020-04-18 15:15:35,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:35,795 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 15:15:35,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762603090] [2020-04-18 15:15:35,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:35,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 15:15:35,796 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:35,798 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:35,806 INFO L259 McrAutomatonBuilder]: Finished intersection with 51 states and 75 transitions. [2020-04-18 15:15:35,806 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:35,873 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 15:15:35,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 15:15:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-04-18 15:15:35,875 INFO L87 Difference]: Start difference. First operand 8010 states and 24924 transitions. Second operand 5 states. [2020-04-18 15:15:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:36,032 INFO L93 Difference]: Finished difference Result 10344 states and 30159 transitions. [2020-04-18 15:15:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 30159 transitions. [2020-04-18 15:15:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:15:36,057 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 15:15:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1524461413, now seen corresponding path program 7 times [2020-04-18 15:15:36,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:36,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110894189] [2020-04-18 15:15:36,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:36,115 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 15:15:36,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110894189] [2020-04-18 15:15:36,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:36,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-04-18 15:15:36,117 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:36,119 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:36,130 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 64 transitions. [2020-04-18 15:15:36,130 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:36,162 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 15:15:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 15:15:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 15:15:36,168 INFO L87 Difference]: Start difference. First operand 10344 states and 30159 transitions. Second operand 6 states. [2020-04-18 15:15:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:36,354 INFO L93 Difference]: Finished difference Result 10955 states and 31107 transitions. [2020-04-18 15:15:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 31107 transitions. [2020-04-18 15:15:36,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-18 15:15:36,375 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 15:15:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 15:15:36,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1311735163, now seen corresponding path program 8 times [2020-04-18 15:15:36,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 15:15:36,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633564102] [2020-04-18 15:15:36,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 15:15:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 15:15:36,424 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 15:15:36,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633564102] [2020-04-18 15:15:36,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 15:15:36,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 15:15:36,425 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 15:15:36,426 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 15:15:36,434 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 64 transitions. [2020-04-18 15:15:36,434 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 15:15:36,461 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 15:15:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 15:15:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 15:15:36,462 INFO L87 Difference]: Start difference. First operand 10955 states and 31107 transitions. Second operand 7 states. [2020-04-18 15:15:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:36,658 INFO L93 Difference]: Finished difference Result 11024 states and 31161 transitions. [2020-04-18 15:15:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 11024 states and 31161 transitions. [2020-04-18 15:15:36,677 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:36,678 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [140731570] [2020-04-18 15:15:36,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 15:15:36,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 15:15:36,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [140731570] [2020-04-18 15:15:36,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 15:15:36,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 15:15:36,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 15:15:36,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 15:15:36,680 INFO L87 Difference]: Start difference. First operand 52 states and 98 transitions. Second operand 19 states. [2020-04-18 15:15:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 15:15:37,151 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2020-04-18 15:15:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-18 15:15:37,151 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-04-18 15:15:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 15:15:37,152 INFO L225 Difference]: With dead ends: 51 [2020-04-18 15:15:37,152 INFO L226 Difference]: Without dead ends: 0 [2020-04-18 15:15:37,154 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=331, Invalid=2425, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 15:15:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-18 15:15:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-18 15:15:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-18 15:15:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-18 15:15:37,154 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-04-18 15:15:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 15:15:37,155 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-18 15:15:37,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 15:15:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-18 15:15:37,155 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 15:15:37,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 03:15:37 BasicIcfg [2020-04-18 15:15:37,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 15:15:37,160 INFO L168 Benchmark]: Toolchain (without parser) took 12740.99 ms. Allocated memory was 136.3 MB in the beginning and 445.6 MB in the end (delta: 309.3 MB). Free memory was 98.8 MB in the beginning and 372.6 MB in the end (delta: -273.7 MB). Peak memory consumption was 35.6 MB. Max. memory is 7.1 GB. [2020-04-18 15:15:37,160 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-18 15:15:37,161 INFO L168 Benchmark]: CACSL2BoogieTranslator took 752.50 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 96.9 MB in the beginning and 154.4 MB in the end (delta: -57.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-04-18 15:15:37,161 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.57 ms. Allocated memory is still 200.3 MB. Free memory was 154.4 MB in the beginning and 152.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-04-18 15:15:37,162 INFO L168 Benchmark]: Boogie Preprocessor took 27.16 ms. Allocated memory is still 200.3 MB. Free memory was 152.3 MB in the beginning and 150.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 15:15:37,162 INFO L168 Benchmark]: RCFGBuilder took 473.21 ms. Allocated memory is still 200.3 MB. Free memory was 150.9 MB in the beginning and 127.2 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-04-18 15:15:37,163 INFO L168 Benchmark]: TraceAbstraction took 11405.76 ms. Allocated memory was 200.3 MB in the beginning and 445.6 MB in the end (delta: 245.4 MB). Free memory was 126.6 MB in the beginning and 372.6 MB in the end (delta: -246.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-04-18 15:15:37,165 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 752.50 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 96.9 MB in the beginning and 154.4 MB in the end (delta: -57.5 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.57 ms. Allocated memory is still 200.3 MB. Free memory was 154.4 MB in the beginning and 152.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.16 ms. Allocated memory is still 200.3 MB. Free memory was 152.3 MB in the beginning and 150.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 473.21 ms. Allocated memory is still 200.3 MB. Free memory was 150.9 MB in the beginning and 127.2 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11405.76 ms. Allocated memory was 200.3 MB in the beginning and 445.6 MB in the end (delta: 245.4 MB). Free memory was 126.6 MB in the beginning and 372.6 MB in the end (delta: -246.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 91 ProgramPointsBefore, 39 ProgramPointsAfterwards, 80 TransitionsBefore, 27 TransitionsAfterwards, 1822 CoEnabledTransitionPairs, 6 FixpointIterations, 13 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 1 ChoiceCompositions, 927 VarBasedMoverChecksPositive, 22 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2895 CheckedPairsTotal, 62 TotalNumberOfCompositions - PositiveResult [Line: 7]: 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 5 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.2s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 290 SDtfs, 780 SDslu, 1078 SDs, 0 SdLazy, 855 SolverSat, 312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 911 GetRequests, 645 SyntacticMatches, 2 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3420 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=850occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 64 StatesRemovedByMinimization, 1 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...