/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 15:07:06,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 15:07:06,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 15:07:06,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 15:07:06,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 15:07:06,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 15:07:06,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 15:07:06,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 15:07:06,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 15:07:06,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 15:07:06,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 15:07:06,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 15:07:06,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 15:07:06,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 15:07:06,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 15:07:06,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 15:07:06,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 15:07:06,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 15:07:06,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 15:07:06,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 15:07:06,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 15:07:06,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 15:07:06,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 15:07:06,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 15:07:06,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-27 15:07:06,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-27 15:07:06,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-27 15:07:06,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-27 15:07:06,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-27 15:07:06,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-27 15:07:06,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 15:07:06,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 15:07:06,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 15:07:06,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 15:07:06,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 15:07:06,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 15:07:06,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 15:07:06,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 15:07:06,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 15:07:06,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 15:07:06,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 15:07:06,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-MCR.epf [2019-12-27 15:07:06,177 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 15:07:06,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 15:07:06,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 15:07:06,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 15:07:06,179 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 15:07:06,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 15:07:06,179 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 15:07:06,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 15:07:06,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 15:07:06,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 15:07:06,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 15:07:06,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 15:07:06,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 15:07:06,181 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 15:07:06,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 15:07:06,181 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 15:07:06,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 15:07:06,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 15:07:06,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 15:07:06,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 15:07:06,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 15:07:06,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:07:06,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 15:07:06,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 15:07:06,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 15:07:06,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 15:07:06,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 15:07:06,183 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 15:07:06,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 15:07:06,184 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 15:07:06,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 15:07:06,449 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 15:07:06,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 15:07:06,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 15:07:06,475 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 15:07:06,476 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 15:07:06,477 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-27 15:07:06,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968f96ba9/3638420b04e14a238a4db3bc8e174318/FLAGb0192ac48 [2019-12-27 15:07:07,094 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 15:07:07,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2019-12-27 15:07:07,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968f96ba9/3638420b04e14a238a4db3bc8e174318/FLAGb0192ac48 [2019-12-27 15:07:07,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/968f96ba9/3638420b04e14a238a4db3bc8e174318 [2019-12-27 15:07:07,438 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 15:07:07,440 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 15:07:07,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:07,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 15:07:07,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 15:07:07,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:07" (1/1) ... [2019-12-27 15:07:07,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c66732b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:07, skipping insertion in model container [2019-12-27 15:07:07,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:07:07" (1/1) ... [2019-12-27 15:07:07,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 15:07:07,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 15:07:08,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:08,025 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 15:07:08,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:07:08,177 INFO L208 MainTranslator]: Completed translation [2019-12-27 15:07:08,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08 WrapperNode [2019-12-27 15:07:08,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 15:07:08,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:08,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 15:07:08,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 15:07:08,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 15:07:08,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 15:07:08,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 15:07:08,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 15:07:08,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... [2019-12-27 15:07:08,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 15:07:08,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 15:07:08,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 15:07:08,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 15:07:08,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:07:08,321 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 15:07:08,321 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 15:07:08,321 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 15:07:08,322 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 15:07:08,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 15:07:08,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 15:07:08,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 15:07:08,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 15:07:08,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 15:07:08,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 15:07:08,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 15:07:08,324 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 15:07:08,718 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 15:07:08,718 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 15:07:08,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:08 BoogieIcfgContainer [2019-12-27 15:07:08,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 15:07:08,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 15:07:08,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 15:07:08,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 15:07:08,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 03:07:07" (1/3) ... [2019-12-27 15:07:08,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295ff23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:08, skipping insertion in model container [2019-12-27 15:07:08,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:07:08" (2/3) ... [2019-12-27 15:07:08,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295ff23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:07:08, skipping insertion in model container [2019-12-27 15:07:08,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:07:08" (3/3) ... [2019-12-27 15:07:08,728 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2019-12-27 15:07:08,739 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 15:07:08,740 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 15:07:08,747 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 15:07:08,749 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 15:07:08,774 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,775 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,775 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,775 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,776 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,776 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,776 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,776 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,777 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,777 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,777 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,777 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,777 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,778 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,780 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,781 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,781 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,781 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,781 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,782 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,782 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,782 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,783 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,783 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,783 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,784 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,785 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,785 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,785 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,786 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,790 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,790 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,791 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,791 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,792 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,792 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,807 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,808 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,808 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,808 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,809 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,810 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:07:08,830 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 15:07:08,854 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 15:07:08,855 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 15:07:08,855 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 15:07:08,855 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 15:07:08,855 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 15:07:08,855 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 15:07:08,855 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 15:07:08,856 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 15:07:08,870 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 15:07:08,872 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:08,919 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:08,921 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:08,927 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 15:07:08,930 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 15:07:08,948 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 15:07:08,948 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:07:08,949 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 15:07:08,952 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 15:07:08,953 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 15:07:10,233 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 15:07:10,358 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-27 15:07:10,358 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 15:07:10,363 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 15:07:10,373 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 15:07:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 15:07:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 15:07:10,383 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,384 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 15:07:10,385 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,391 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-27 15:07:10,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879712390] [2019-12-27 15:07:10,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:10,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879712390] [2019-12-27 15:07:10,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:10,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 15:07:10,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1009925713] [2019-12-27 15:07:10,705 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:10,710 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:10,726 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 15:07:10,726 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:10,732 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:10,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 15:07:10,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:10,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 15:07:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:10,752 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 15:07:10,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:10,787 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 15:07:10,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:07:10,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 15:07:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:10,814 INFO L225 Difference]: With dead ends: 54 [2019-12-27 15:07:10,814 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 15:07:10,816 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:07:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 15:07:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 15:07:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 15:07:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 15:07:10,872 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 15:07:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:10,881 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 15:07:10,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 15:07:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 15:07:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:10,882 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:10,882 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:10,883 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-27 15:07:10,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:10,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704865214] [2019-12-27 15:07:10,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704865214] [2019-12-27 15:07:11,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:11,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:11,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [155584036] [2019-12-27 15:07:11,030 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,030 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,033 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 8 states and 7 transitions. [2019-12-27 15:07:11,033 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,033 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:11,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:11,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:11,035 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 15:07:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,056 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-27 15:07:11,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:11,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,063 INFO L225 Difference]: With dead ends: 42 [2019-12-27 15:07:11,063 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 15:07:11,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 15:07:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-27 15:07:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 15:07:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-27 15:07:11,074 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-27 15:07:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,074 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-27 15:07:11,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-27 15:07:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:07:11,075 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,075 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,075 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-27 15:07:11,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140373686] [2019-12-27 15:07:11,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140373686] [2019-12-27 15:07:11,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:11,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:07:11,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [84417833] [2019-12-27 15:07:11,146 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,147 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,149 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 15:07:11,149 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,153 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:07:11,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:07:11,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:07:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:11,154 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-27 15:07:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,171 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 15:07:11,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:07:11,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:07:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,173 INFO L225 Difference]: With dead ends: 51 [2019-12-27 15:07:11,173 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 15:07:11,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:07:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 15:07:11,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 15:07:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 15:07:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 15:07:11,181 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 15:07:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,181 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 15:07:11,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:07:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 15:07:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:11,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,182 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,182 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-27 15:07:11,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32412099] [2019-12-27 15:07:11,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32412099] [2019-12-27 15:07:11,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315046297] [2019-12-27 15:07:11,259 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:11,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:11,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:11,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:11,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:11,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:11,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [863075824] [2019-12-27 15:07:11,404 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,405 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,406 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 9 states and 8 transitions. [2019-12-27 15:07:11,406 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,406 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:11,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:11,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,408 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 5 states. [2019-12-27 15:07:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,433 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-27 15:07:11,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:11,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,437 INFO L225 Difference]: With dead ends: 56 [2019-12-27 15:07:11,437 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 15:07:11,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 15:07:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-27 15:07:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 15:07:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-27 15:07:11,453 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-27 15:07:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,453 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-27 15:07:11,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-27 15:07:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 15:07:11,454 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,455 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:11,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:11,659 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:11,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-27 15:07:11,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:11,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202381917] [2019-12-27 15:07:11,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202381917] [2019-12-27 15:07:11,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871611363] [2019-12-27 15:07:11,774 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:11,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:11,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:11,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:11,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:11,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:11,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 15:07:11,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [619091987] [2019-12-27 15:07:11,885 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:11,885 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:11,887 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 20 transitions. [2019-12-27 15:07:11,887 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:11,889 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:07:11,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:11,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:11,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:07:11,890 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 5 states. [2019-12-27 15:07:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:11,930 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-27 15:07:11,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:11,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-27 15:07:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:11,934 INFO L225 Difference]: With dead ends: 63 [2019-12-27 15:07:11,934 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 15:07:11,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:07:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 15:07:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-27 15:07:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 15:07:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 15:07:11,947 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 15:07:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:11,947 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 15:07:11,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 15:07:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:11,952 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:11,952 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:12,164 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,164 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-27 15:07:12,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456043712] [2019-12-27 15:07:12,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456043712] [2019-12-27 15:07:12,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578087077] [2019-12-27 15:07:12,262 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:12,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:12,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:12,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:12,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:12,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:12,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [686818495] [2019-12-27 15:07:12,394 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,396 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,397 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 10 states and 9 transitions. [2019-12-27 15:07:12,397 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,397 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:12,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:12,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:12,398 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 6 states. [2019-12-27 15:07:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,428 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-27 15:07:12,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:12,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,430 INFO L225 Difference]: With dead ends: 66 [2019-12-27 15:07:12,430 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 15:07:12,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 15:07:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-27 15:07:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 15:07:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-27 15:07:12,437 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-27 15:07:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,437 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-27 15:07:12,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-27 15:07:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,439 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,439 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:12,643 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,644 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-27 15:07:12,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718185474] [2019-12-27 15:07:12,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718185474] [2019-12-27 15:07:12,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:12,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:12,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1875320834] [2019-12-27 15:07:12,746 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,746 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,747 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 15:07:12,748 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,749 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:12,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:12,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,750 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-27 15:07:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,763 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 15:07:12,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:12,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,766 INFO L225 Difference]: With dead ends: 68 [2019-12-27 15:07:12,767 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 15:07:12,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 15:07:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-27 15:07:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 15:07:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-27 15:07:12,773 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-27 15:07:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,775 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-27 15:07:12,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-27 15:07:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,776 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,776 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,776 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,776 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-27 15:07:12,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715803780] [2019-12-27 15:07:12,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715803780] [2019-12-27 15:07:12,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:07:12,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:07:12,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1725175207] [2019-12-27 15:07:12,822 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:12,823 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:12,825 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 15:07:12,825 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:12,827 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:12,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:07:12,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:12,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:07:12,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:07:12,828 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-27 15:07:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:12,868 INFO L93 Difference]: Finished difference Result 69 states and 145 transitions. [2019-12-27 15:07:12,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:07:12,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:07:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:12,869 INFO L225 Difference]: With dead ends: 69 [2019-12-27 15:07:12,870 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 15:07:12,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-12-27 15:07:12,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 15:07:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-12-27 15:07:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 15:07:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-27 15:07:12,883 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-27 15:07:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:12,886 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-27 15:07:12,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:07:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-27 15:07:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:07:12,887 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:12,887 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:12,888 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:12,888 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-27 15:07:12,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:12,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927683113] [2019-12-27 15:07:12,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:12,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927683113] [2019-12-27 15:07:12,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381772693] [2019-12-27 15:07:12,959 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:13,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:13,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:13,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [613821667] [2019-12-27 15:07:13,076 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:13,077 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:13,080 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 25 transitions. [2019-12-27 15:07:13,080 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:13,086 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:13,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:13,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:13,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:13,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:13,087 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 6 states. [2019-12-27 15:07:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:13,148 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-27 15:07:13,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:13,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-12-27 15:07:13,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:13,149 INFO L225 Difference]: With dead ends: 77 [2019-12-27 15:07:13,150 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 15:07:13,150 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 15:07:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-27 15:07:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 15:07:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 15:07:13,166 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 15:07:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:13,166 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 15:07:13,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 15:07:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:13,167 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:13,167 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:13,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,368 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-27 15:07:13,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:13,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814089744] [2019-12-27 15:07:13,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:13,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814089744] [2019-12-27 15:07:13,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963804461] [2019-12-27 15:07:13,454 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,503 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:13,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:13,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:13,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1367367310] [2019-12-27 15:07:13,598 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:13,599 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:13,600 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 11 states and 10 transitions. [2019-12-27 15:07:13,600 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:13,600 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:13,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:13,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:13,602 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 7 states. [2019-12-27 15:07:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:13,621 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-27 15:07:13,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:13,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:13,623 INFO L225 Difference]: With dead ends: 80 [2019-12-27 15:07:13,623 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 15:07:13,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 15:07:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-27 15:07:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:07:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 15:07:13,628 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 15:07:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:13,628 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 15:07:13,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:13,629 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 15:07:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:13,630 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:13,630 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:13,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,834 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-27 15:07:13,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:13,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090968669] [2019-12-27 15:07:13,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:13,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090968669] [2019-12-27 15:07:13,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717942863] [2019-12-27 15:07:13,884 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:13,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:13,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:13,933 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:13,934 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:13,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:13,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:13,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [477526386] [2019-12-27 15:07:13,999 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,000 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,005 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 20 transitions. [2019-12-27 15:07:14,020 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,020 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:14,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,021 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 6 states. [2019-12-27 15:07:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,063 INFO L93 Difference]: Finished difference Result 81 states and 174 transitions. [2019-12-27 15:07:14,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,065 INFO L225 Difference]: With dead ends: 81 [2019-12-27 15:07:14,065 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 15:07:14,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 15:07:14,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2019-12-27 15:07:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:07:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 15:07:14,075 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 15:07:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,075 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 15:07:14,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 15:07:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,076 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,077 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:14,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,277 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:14,278 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-27 15:07:14,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:14,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210929766] [2019-12-27 15:07:14,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:14,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210929766] [2019-12-27 15:07:14,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772223454] [2019-12-27 15:07:14,327 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:14,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:14,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:14,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:14,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:14,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:14,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [851040763] [2019-12-27 15:07:14,422 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,423 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,424 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:14,424 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,425 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:14,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,428 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 6 states. [2019-12-27 15:07:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,458 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 15:07:14,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,460 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:07:14,460 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:07:14,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:07:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2019-12-27 15:07:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 15:07:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 15:07:14,466 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 15:07:14,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,466 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 15:07:14,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 15:07:14,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,467 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,468 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:14,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,671 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:14,672 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-27 15:07:14,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:14,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314176127] [2019-12-27 15:07:14,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:14,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314176127] [2019-12-27 15:07:14,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052011682] [2019-12-27 15:07:14,730 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:14,770 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:14,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:14,771 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:14,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:14,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:14,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:14,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2058235218] [2019-12-27 15:07:14,848 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:14,849 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:14,851 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:07:14,852 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:14,852 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:14,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:14,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:14,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:14,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:14,853 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 6 states. [2019-12-27 15:07:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:14,889 INFO L93 Difference]: Finished difference Result 84 states and 180 transitions. [2019-12-27 15:07:14,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:14,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:14,890 INFO L225 Difference]: With dead ends: 84 [2019-12-27 15:07:14,890 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 15:07:14,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:07:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 15:07:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-12-27 15:07:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 15:07:14,895 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 15:07:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:14,895 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 15:07:14,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 15:07:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:14,896 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:14,896 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:15,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,099 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:15,099 INFO L82 PathProgramCache]: Analyzing trace with hash 507891352, now seen corresponding path program 6 times [2019-12-27 15:07:15,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:15,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687148864] [2019-12-27 15:07:15,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:15,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687148864] [2019-12-27 15:07:15,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785809912] [2019-12-27 15:07:15,156 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,201 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:15,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:15,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:15,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:15,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:15,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:15,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1205267768] [2019-12-27 15:07:15,240 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:15,241 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:15,243 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 28 transitions. [2019-12-27 15:07:15,243 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:15,245 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:15,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:15,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:15,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:15,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:15,247 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 6 states. [2019-12-27 15:07:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:15,300 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-27 15:07:15,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:15,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:15,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:15,301 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:15,302 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:15,302 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-12-27 15:07:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 15:07:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 15:07:15,305 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 15:07:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:15,305 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 15:07:15,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 15:07:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:15,306 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:15,306 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:15,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,512 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 7 times [2019-12-27 15:07:15,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:15,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506963882] [2019-12-27 15:07:15,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:15,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506963882] [2019-12-27 15:07:15,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90695183] [2019-12-27 15:07:15,586 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:15,656 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:15,657 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:15,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:15,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:15,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [873377428] [2019-12-27 15:07:15,732 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:15,732 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:15,734 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:15,734 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:15,736 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:15,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:15,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:15,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:15,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:15,737 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 6 states. [2019-12-27 15:07:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:15,799 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2019-12-27 15:07:15,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:15,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:15,800 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:07:15,800 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:07:15,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:07:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2019-12-27 15:07:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:07:15,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 161 transitions. [2019-12-27 15:07:15,805 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 161 transitions. Word has length 10 [2019-12-27 15:07:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:15,805 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 161 transitions. [2019-12-27 15:07:15,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:15,806 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 161 transitions. [2019-12-27 15:07:15,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:15,806 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:15,807 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:16,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,015 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:16,016 INFO L82 PathProgramCache]: Analyzing trace with hash 507886547, now seen corresponding path program 8 times [2019-12-27 15:07:16,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:16,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880784862] [2019-12-27 15:07:16,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:16,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880784862] [2019-12-27 15:07:16,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118936823] [2019-12-27 15:07:16,110 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:16,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:16,188 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:07:16,189 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:16,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:16,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 15:07:16,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [185368350] [2019-12-27 15:07:16,255 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:16,256 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:16,258 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:07:16,258 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:16,259 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:16,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:07:16,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:16,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:07:16,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:07:16,260 INFO L87 Difference]: Start difference. First operand 72 states and 161 transitions. Second operand 6 states. [2019-12-27 15:07:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:16,314 INFO L93 Difference]: Finished difference Result 85 states and 178 transitions. [2019-12-27 15:07:16,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:07:16,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:07:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:16,318 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:07:16,318 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:07:16,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:07:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2019-12-27 15:07:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 15:07:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 15:07:16,323 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 15:07:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:16,323 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 15:07:16,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:07:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 15:07:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:07:16,324 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:16,324 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:16,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,528 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-27 15:07:16,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:16,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685231546] [2019-12-27 15:07:16,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:16,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685231546] [2019-12-27 15:07:16,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829882313] [2019-12-27 15:07:16,590 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,628 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:16,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:16,629 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:16,630 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:16,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:16,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:16,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [889345742] [2019-12-27 15:07:16,684 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:16,685 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:16,687 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 30 transitions. [2019-12-27 15:07:16,687 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:16,690 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 8 times. [2019-12-27 15:07:16,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:16,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:16,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:16,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:16,691 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 7 states. [2019-12-27 15:07:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:16,781 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-27 15:07:16,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:16,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-27 15:07:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:16,784 INFO L225 Difference]: With dead ends: 92 [2019-12-27 15:07:16,784 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 15:07:16,784 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 15:07:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-27 15:07:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 15:07:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 15:07:16,788 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 15:07:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:16,788 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 15:07:16,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 15:07:16,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:16,789 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:16,789 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:16,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:16,992 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:16,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:16,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-27 15:07:16,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:16,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315453950] [2019-12-27 15:07:16,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:17,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315453950] [2019-12-27 15:07:17,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668365615] [2019-12-27 15:07:17,104 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,180 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:17,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:17,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:17,183 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:17,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:17,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:17,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [935348913] [2019-12-27 15:07:17,300 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,303 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,304 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 11 transitions. [2019-12-27 15:07:17,304 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,304 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:17,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:17,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:17,305 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 8 states. [2019-12-27 15:07:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,331 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-27 15:07:17,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:17,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,332 INFO L225 Difference]: With dead ends: 95 [2019-12-27 15:07:17,333 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 15:07:17,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 15:07:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-27 15:07:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:17,336 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,336 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:17,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,337 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,337 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:17,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,538 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 9 times [2019-12-27 15:07:17,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433814170] [2019-12-27 15:07:17,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:17,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433814170] [2019-12-27 15:07:17,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637359101] [2019-12-27 15:07:17,602 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:17,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:17,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:17,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:17,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:17,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:17,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1485946943] [2019-12-27 15:07:17,724 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:17,725 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:17,726 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:17,727 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:17,727 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:17,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:17,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:17,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:17,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:17,728 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:17,750 INFO L93 Difference]: Finished difference Result 98 states and 211 transitions. [2019-12-27 15:07:17,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:17,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:17,752 INFO L225 Difference]: With dead ends: 98 [2019-12-27 15:07:17,752 INFO L226 Difference]: Without dead ends: 97 [2019-12-27 15:07:17,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-27 15:07:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2019-12-27 15:07:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:17,756 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:17,757 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:17,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:17,757 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:17,757 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:17,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:17,962 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 10 times [2019-12-27 15:07:17,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:17,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348595570] [2019-12-27 15:07:17,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348595570] [2019-12-27 15:07:18,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885864354] [2019-12-27 15:07:18,052 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,098 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:18,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:18,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [902389990] [2019-12-27 15:07:18,161 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,162 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,163 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:18,164 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,164 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:18,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:18,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:18,165 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,213 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-27 15:07:18,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:18,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:18,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,214 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:18,214 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:18,215 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-27 15:07:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:18,219 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,219 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:18,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:18,220 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,220 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,423 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 11 times [2019-12-27 15:07:18,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668411716] [2019-12-27 15:07:18,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668411716] [2019-12-27 15:07:18,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010242627] [2019-12-27 15:07:18,491 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,535 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:18,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:18,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:18,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:18,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:18,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:18,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1859172828] [2019-12-27 15:07:18,676 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:18,677 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:18,679 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 21 transitions. [2019-12-27 15:07:18,679 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:18,679 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:18,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:18,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:18,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:18,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:18,680 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:18,723 INFO L93 Difference]: Finished difference Result 101 states and 217 transitions. [2019-12-27 15:07:18,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:18,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:18,724 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:07:18,724 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:07:18,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:07:18,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-12-27 15:07:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 15:07:18,727 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 15:07:18,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:18,727 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 15:07:18,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:18,727 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 15:07:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:18,727 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:18,727 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:18,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:18,932 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555059, now seen corresponding path program 12 times [2019-12-27 15:07:18,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:18,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79718676] [2019-12-27 15:07:18,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79718676] [2019-12-27 15:07:19,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015257239] [2019-12-27 15:07:19,006 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,048 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:19,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:19,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:19,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:19,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [669588244] [2019-12-27 15:07:19,111 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,112 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,113 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:19,113 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,113 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:19,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:19,114 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 7 states. [2019-12-27 15:07:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,177 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2019-12-27 15:07:19,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:19,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:19,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,178 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:19,179 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:19,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:19,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2019-12-27 15:07:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:19,182 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,182 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:19,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:19,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,183 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,384 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 13 times [2019-12-27 15:07:19,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46679327] [2019-12-27 15:07:19,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46679327] [2019-12-27 15:07:19,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010734469] [2019-12-27 15:07:19,442 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:19,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:19,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1172645267] [2019-12-27 15:07:19,561 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:19,562 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:19,563 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:19,563 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:19,564 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:19,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:19,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:19,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:19,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:19,564 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:19,652 INFO L93 Difference]: Finished difference Result 103 states and 222 transitions. [2019-12-27 15:07:19,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:19,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:19,653 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:19,653 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:19,654 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2019-12-27 15:07:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:19,657 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:19,658 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:19,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:19,659 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:19,659 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:19,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,866 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 14 times [2019-12-27 15:07:19,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:19,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234442534] [2019-12-27 15:07:19,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:19,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234442534] [2019-12-27 15:07:19,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355711209] [2019-12-27 15:07:19,933 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:19,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:19,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:19,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:19,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:20,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [675727165] [2019-12-27 15:07:20,052 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,053 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,054 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:20,054 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,055 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:20,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:20,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:20,056 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,117 INFO L93 Difference]: Finished difference Result 104 states and 223 transitions. [2019-12-27 15:07:20,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:20,118 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,119 INFO L225 Difference]: With dead ends: 104 [2019-12-27 15:07:20,119 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 15:07:20,119 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 15:07:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2019-12-27 15:07:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:20,122 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,123 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:20,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:20,124 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,124 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,327 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 15 times [2019-12-27 15:07:20,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859137919] [2019-12-27 15:07:20,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859137919] [2019-12-27 15:07:20,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606142074] [2019-12-27 15:07:20,393 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:07:20,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,451 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:20,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:20,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1080453437] [2019-12-27 15:07:20,535 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:20,536 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:20,538 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:07:20,538 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:20,538 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:20,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:20,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:20,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:20,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:20,539 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:20,618 INFO L93 Difference]: Finished difference Result 103 states and 222 transitions. [2019-12-27 15:07:20,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:20,619 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:20,620 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:07:20,620 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:07:20,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:07:20,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2019-12-27 15:07:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:20,625 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:20,625 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:20,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:20,626 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:20,626 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:20,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,837 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1435231979, now seen corresponding path program 16 times [2019-12-27 15:07:20,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:20,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603050037] [2019-12-27 15:07:20,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:20,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603050037] [2019-12-27 15:07:20,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283577534] [2019-12-27 15:07:20,900 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:20,944 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:20,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:20,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:20,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:21,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [503933416] [2019-12-27 15:07:21,026 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,027 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,028 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:21,028 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,032 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:21,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:21,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:21,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:21,033 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,085 INFO L93 Difference]: Finished difference Result 106 states and 222 transitions. [2019-12-27 15:07:21,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:21,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,087 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:21,087 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:21,088 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:07:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2019-12-27 15:07:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:21,092 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,092 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:21,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:21,093 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,093 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,296 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236629, now seen corresponding path program 17 times [2019-12-27 15:07:21,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932049255] [2019-12-27 15:07:21,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932049255] [2019-12-27 15:07:21,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112829602] [2019-12-27 15:07:21,361 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,409 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:21,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:21,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:21,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1356577943] [2019-12-27 15:07:21,482 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:21,483 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:21,485 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:21,485 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:21,488 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:21,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:21,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:21,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:21,489 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:21,598 INFO L93 Difference]: Finished difference Result 109 states and 228 transitions. [2019-12-27 15:07:21,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:21,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:21,599 INFO L225 Difference]: With dead ends: 109 [2019-12-27 15:07:21,600 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 15:07:21,600 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 15:07:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2019-12-27 15:07:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:21,603 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:21,604 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:21,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:21,604 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:21,604 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:21,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,805 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:21,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1435236784, now seen corresponding path program 18 times [2019-12-27 15:07:21,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:21,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598968783] [2019-12-27 15:07:21,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:21,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598968783] [2019-12-27 15:07:21,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679871023] [2019-12-27 15:07:21,864 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:21,941 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:21,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:21,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:21,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:22,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [695809051] [2019-12-27 15:07:22,029 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,030 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,032 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 29 transitions. [2019-12-27 15:07:22,032 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,035 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:22,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:22,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:22,036 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,116 INFO L93 Difference]: Finished difference Result 106 states and 222 transitions. [2019-12-27 15:07:22,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:22,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,117 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:07:22,117 INFO L226 Difference]: Without dead ends: 105 [2019-12-27 15:07:22,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-27 15:07:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2019-12-27 15:07:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 15:07:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-27 15:07:22,121 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-27 15:07:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,121 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-27 15:07:22,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-27 15:07:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:22,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,122 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,324 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380779, now seen corresponding path program 19 times [2019-12-27 15:07:22,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394622586] [2019-12-27 15:07:22,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394622586] [2019-12-27 15:07:22,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563960774] [2019-12-27 15:07:22,377 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:22,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [81378504] [2019-12-27 15:07:22,471 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,472 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,473 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:22,473 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,474 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:22,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:22,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:22,475 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 7 states. [2019-12-27 15:07:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:22,565 INFO L93 Difference]: Finished difference Result 108 states and 227 transitions. [2019-12-27 15:07:22,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:22,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:22,566 INFO L225 Difference]: With dead ends: 108 [2019-12-27 15:07:22,566 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 15:07:22,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:22,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 15:07:22,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2019-12-27 15:07:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:22,569 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:22,569 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:22,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:22,569 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:22,570 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:22,570 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:22,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,771 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 20 times [2019-12-27 15:07:22,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:22,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367960635] [2019-12-27 15:07:22,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367960635] [2019-12-27 15:07:22,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281880909] [2019-12-27 15:07:22,832 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:22,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:22,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:22,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:22,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:22,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:22,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:22,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [235267193] [2019-12-27 15:07:22,961 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:22,962 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:22,963 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:22,963 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:22,965 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:22,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:22,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:22,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:22,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:22,966 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,058 INFO L93 Difference]: Finished difference Result 110 states and 232 transitions. [2019-12-27 15:07:23,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:23,058 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,059 INFO L225 Difference]: With dead ends: 110 [2019-12-27 15:07:23,059 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 15:07:23,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 15:07:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2019-12-27 15:07:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:07:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 15:07:23,063 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 15:07:23,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,064 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 15:07:23,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 15:07:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:23,064 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,065 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,268 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385584, now seen corresponding path program 21 times [2019-12-27 15:07:23,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968317626] [2019-12-27 15:07:23,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968317626] [2019-12-27 15:07:23,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809798249] [2019-12-27 15:07:23,322 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:23,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:23,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [676011713] [2019-12-27 15:07:23,432 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,433 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,436 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:23,436 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,438 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:23,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:23,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:23,439 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 7 states. [2019-12-27 15:07:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:23,548 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2019-12-27 15:07:23,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:07:23,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:23,549 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:07:23,550 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:07:23,550 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:07:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2019-12-27 15:07:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 15:07:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 15:07:23,555 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 15:07:23,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:23,555 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 15:07:23,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 15:07:23,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:23,556 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:23,556 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:23,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,761 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:23,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:23,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1435385739, now seen corresponding path program 22 times [2019-12-27 15:07:23,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:23,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295516236] [2019-12-27 15:07:23,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295516236] [2019-12-27 15:07:23,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353561386] [2019-12-27 15:07:23,837 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:23,881 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:23,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:23,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:07:23,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:23,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:23,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 15:07:23,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [809731567] [2019-12-27 15:07:23,953 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:23,955 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:23,956 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:07:23,956 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:23,957 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:23,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:07:23,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:23,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:07:23,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:07:23,958 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 7 states. [2019-12-27 15:07:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,072 INFO L93 Difference]: Finished difference Result 104 states and 214 transitions. [2019-12-27 15:07:24,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:07:24,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:07:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,074 INFO L225 Difference]: With dead ends: 104 [2019-12-27 15:07:24,074 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 15:07:24,075 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 15:07:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2019-12-27 15:07:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 15:07:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 15:07:24,078 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 15:07:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,078 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 15:07:24,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:07:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 15:07:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:07:24,079 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,079 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,283 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-27 15:07:24,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157220694] [2019-12-27 15:07:24,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157220694] [2019-12-27 15:07:24,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139975048] [2019-12-27 15:07:24,353 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,397 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:24,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:24,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:24,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1616715037] [2019-12-27 15:07:24,460 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,461 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,463 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 35 transitions. [2019-12-27 15:07:24,463 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,478 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 10 times. [2019-12-27 15:07:24,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:24,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:24,479 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 8 states. [2019-12-27 15:07:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:24,577 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 15:07:24,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:24,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-12-27 15:07:24,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:24,579 INFO L225 Difference]: With dead ends: 107 [2019-12-27 15:07:24,579 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 15:07:24,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 15:07:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-27 15:07:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 15:07:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 15:07:24,583 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 15:07:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:24,583 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 15:07:24,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 15:07:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:24,584 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:24,584 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:24,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,788 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-27 15:07:24,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:24,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360780295] [2019-12-27 15:07:24,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360780295] [2019-12-27 15:07:24,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227140883] [2019-12-27 15:07:24,868 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:24,913 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:24,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:24,914 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:07:24,914 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:24,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:07:24,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-27 15:07:24,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [261798389] [2019-12-27 15:07:24,978 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:24,979 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:24,980 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 13 states and 12 transitions. [2019-12-27 15:07:24,980 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:24,981 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:24,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:24,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:24,981 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-27 15:07:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,002 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-27 15:07:25,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:25,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,004 INFO L225 Difference]: With dead ends: 124 [2019-12-27 15:07:25,004 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 15:07:25,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 15:07:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-27 15:07:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 15:07:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-27 15:07:25,008 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-27 15:07:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,009 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-27 15:07:25,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-27 15:07:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:25,009 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,010 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,213 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 23 times [2019-12-27 15:07:25,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058258622] [2019-12-27 15:07:25,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058258622] [2019-12-27 15:07:25,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40015905] [2019-12-27 15:07:25,294 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,337 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:25,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:25,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:25,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1092839228] [2019-12-27 15:07:25,457 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:25,459 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:25,462 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 26 transitions. [2019-12-27 15:07:25,463 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:25,463 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:25,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:25,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:25,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:25,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:25,464 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 8 states. [2019-12-27 15:07:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:25,508 INFO L93 Difference]: Finished difference Result 133 states and 305 transitions. [2019-12-27 15:07:25,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:25,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:25,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:25,510 INFO L225 Difference]: With dead ends: 133 [2019-12-27 15:07:25,510 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 15:07:25,510 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 15:07:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2019-12-27 15:07:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 15:07:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-27 15:07:25,518 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-27 15:07:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:25,518 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-27 15:07:25,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-27 15:07:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:25,519 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:25,519 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:25,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,720 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 24 times [2019-12-27 15:07:25,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:25,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060914397] [2019-12-27 15:07:25,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:25,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060914397] [2019-12-27 15:07:25,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177927206] [2019-12-27 15:07:25,823 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:25,895 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:25,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:25,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:25,898 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:26,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:26,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:26,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [605329909] [2019-12-27 15:07:26,005 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:26,007 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:26,009 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:26,009 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:26,009 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:26,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:26,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:26,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:26,010 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 8 states. [2019-12-27 15:07:26,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:26,052 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2019-12-27 15:07:26,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:26,053 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:26,054 INFO L225 Difference]: With dead ends: 140 [2019-12-27 15:07:26,054 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 15:07:26,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:07:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 15:07:26,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2019-12-27 15:07:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 15:07:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-27 15:07:26,058 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-27 15:07:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:26,059 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-27 15:07:26,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-27 15:07:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:26,061 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:26,061 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:26,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:26,264 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:26,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 25 times [2019-12-27 15:07:26,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:26,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559912708] [2019-12-27 15:07:26,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:26,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559912708] [2019-12-27 15:07:26,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816236498] [2019-12-27 15:07:26,358 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:26,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:26,399 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:28,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:28,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:28,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [569733204] [2019-12-27 15:07:28,500 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:28,501 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:28,503 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:28,503 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:28,503 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:28,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:28,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:28,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:28,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=115, Unknown=1, NotChecked=0, Total=182 [2019-12-27 15:07:28,504 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 8 states. [2019-12-27 15:07:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:28,577 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2019-12-27 15:07:28,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:28,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:28,579 INFO L225 Difference]: With dead ends: 140 [2019-12-27 15:07:28,579 INFO L226 Difference]: Without dead ends: 139 [2019-12-27 15:07:28,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=79, Invalid=130, Unknown=1, NotChecked=0, Total=210 [2019-12-27 15:07:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-27 15:07:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2019-12-27 15:07:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 15:07:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-27 15:07:28,585 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-27 15:07:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:28,585 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-27 15:07:28,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-27 15:07:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:28,586 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:28,586 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:28,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,788 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:28,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:28,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 26 times [2019-12-27 15:07:28,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:28,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563875651] [2019-12-27 15:07:28,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:28,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563875651] [2019-12-27 15:07:28,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249652929] [2019-12-27 15:07:28,867 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:28,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:28,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:28,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:28,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:29,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1699249162] [2019-12-27 15:07:29,028 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,030 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,033 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:29,033 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,033 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:29,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:29,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:29,034 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 8 states. [2019-12-27 15:07:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,121 INFO L93 Difference]: Finished difference Result 142 states and 326 transitions. [2019-12-27 15:07:29,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:29,121 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,123 INFO L225 Difference]: With dead ends: 142 [2019-12-27 15:07:29,123 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 15:07:29,124 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 15:07:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 121. [2019-12-27 15:07:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 15:07:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-27 15:07:29,128 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-27 15:07:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,128 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-27 15:07:29,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-27 15:07:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:29,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,129 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:29,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,332 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:29,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 27 times [2019-12-27 15:07:29,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:29,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571819356] [2019-12-27 15:07:29,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571819356] [2019-12-27 15:07:29,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204956837] [2019-12-27 15:07:29,394 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,434 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:29,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,435 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:29,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:29,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1305008312] [2019-12-27 15:07:29,532 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:29,533 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:29,535 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:29,535 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:29,535 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:29,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:29,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:29,535 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 8 states. [2019-12-27 15:07:29,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:29,609 INFO L93 Difference]: Finished difference Result 149 states and 345 transitions. [2019-12-27 15:07:29,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:29,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:29,611 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:07:29,611 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:07:29,611 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:07:29,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2019-12-27 15:07:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-27 15:07:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 288 transitions. [2019-12-27 15:07:29,614 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 288 transitions. Word has length 12 [2019-12-27 15:07:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:29,615 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 288 transitions. [2019-12-27 15:07:29,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:29,615 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 288 transitions. [2019-12-27 15:07:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:29,615 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:29,616 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:29,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,819 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 28 times [2019-12-27 15:07:29,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:29,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699235030] [2019-12-27 15:07:29,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:29,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699235030] [2019-12-27 15:07:29,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796176036] [2019-12-27 15:07:29,887 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:29,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:29,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:29,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:29,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:30,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1417724713] [2019-12-27 15:07:30,051 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,052 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,053 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:30,054 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,054 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:30,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:30,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:30,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:30,054 INFO L87 Difference]: Start difference. First operand 120 states and 288 transitions. Second operand 8 states. [2019-12-27 15:07:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:30,129 INFO L93 Difference]: Finished difference Result 148 states and 341 transitions. [2019-12-27 15:07:30,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:30,136 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:30,137 INFO L225 Difference]: With dead ends: 148 [2019-12-27 15:07:30,138 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 15:07:30,138 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 15:07:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2019-12-27 15:07:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 15:07:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 292 transitions. [2019-12-27 15:07:30,141 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 292 transitions. Word has length 12 [2019-12-27 15:07:30,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:30,142 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 292 transitions. [2019-12-27 15:07:30,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 292 transitions. [2019-12-27 15:07:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:30,142 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:30,142 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,346 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 29 times [2019-12-27 15:07:30,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575610944] [2019-12-27 15:07:30,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575610944] [2019-12-27 15:07:30,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747218697] [2019-12-27 15:07:30,409 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,456 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:30,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:30,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:30,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:30,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:30,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1101319582] [2019-12-27 15:07:30,588 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:30,589 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:30,591 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 22 transitions. [2019-12-27 15:07:30,591 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:30,592 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:30,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:30,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:30,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:30,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:30,592 INFO L87 Difference]: Start difference. First operand 121 states and 292 transitions. Second operand 8 states. [2019-12-27 15:07:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:30,677 INFO L93 Difference]: Finished difference Result 143 states and 330 transitions. [2019-12-27 15:07:30,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:30,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:30,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:30,679 INFO L225 Difference]: With dead ends: 143 [2019-12-27 15:07:30,679 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 15:07:30,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 15:07:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2019-12-27 15:07:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 15:07:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 289 transitions. [2019-12-27 15:07:30,685 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 289 transitions. Word has length 12 [2019-12-27 15:07:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:30,685 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 289 transitions. [2019-12-27 15:07:30,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 289 transitions. [2019-12-27 15:07:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:30,686 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:30,686 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:30,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:30,889 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1750434070, now seen corresponding path program 30 times [2019-12-27 15:07:30,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:30,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098594948] [2019-12-27 15:07:30,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:30,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098594948] [2019-12-27 15:07:30,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119678989] [2019-12-27 15:07:30,958 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,003 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:31,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:31,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:31,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [347417687] [2019-12-27 15:07:31,105 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,106 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,109 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:31,109 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,110 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:31,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:31,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:31,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:31,111 INFO L87 Difference]: Start difference. First operand 121 states and 289 transitions. Second operand 8 states. [2019-12-27 15:07:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,226 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-27 15:07:31,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:31,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,228 INFO L225 Difference]: With dead ends: 143 [2019-12-27 15:07:31,229 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 15:07:31,229 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:31,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 15:07:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2019-12-27 15:07:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 15:07:31,235 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-27 15:07:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,236 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 15:07:31,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 15:07:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:31,237 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,237 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,442 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1750433915, now seen corresponding path program 31 times [2019-12-27 15:07:31,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932335497] [2019-12-27 15:07:31,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932335497] [2019-12-27 15:07:31,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643705154] [2019-12-27 15:07:31,513 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:31,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:31,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:31,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:31,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:31,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [227513154] [2019-12-27 15:07:31,633 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:31,634 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:31,635 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:31,635 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:31,636 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:31,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:31,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:31,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:31,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:31,637 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 8 states. [2019-12-27 15:07:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:31,732 INFO L93 Difference]: Finished difference Result 149 states and 345 transitions. [2019-12-27 15:07:31,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:31,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:31,734 INFO L225 Difference]: With dead ends: 149 [2019-12-27 15:07:31,734 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:07:31,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:31,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:07:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2019-12-27 15:07:31,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-27 15:07:31,738 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-27 15:07:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:31,739 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-27 15:07:31,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-27 15:07:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:31,739 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:31,739 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:31,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:31,943 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:31,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 32 times [2019-12-27 15:07:31,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:31,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138267124] [2019-12-27 15:07:31,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138267124] [2019-12-27 15:07:32,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15853800] [2019-12-27 15:07:32,007 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:32,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:32,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:32,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:32,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:32,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:32,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1719784834] [2019-12-27 15:07:32,140 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:32,141 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:32,143 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:32,143 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:32,144 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:32,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:32,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:32,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:32,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:32,145 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 8 states. [2019-12-27 15:07:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:32,760 INFO L93 Difference]: Finished difference Result 154 states and 356 transitions. [2019-12-27 15:07:32,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:32,761 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:32,762 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:07:32,762 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:07:32,763 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=175, Unknown=1, NotChecked=0, Total=272 [2019-12-27 15:07:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:07:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 125. [2019-12-27 15:07:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 15:07:32,767 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-27 15:07:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:32,768 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 15:07:32,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 15:07:32,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:32,769 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:32,769 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:32,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:32,972 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 33 times [2019-12-27 15:07:32,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:32,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722173818] [2019-12-27 15:07:32,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722173818] [2019-12-27 15:07:33,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698738911] [2019-12-27 15:07:33,046 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:33,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:33,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:33,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:33,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:33,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [704196454] [2019-12-27 15:07:33,186 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:33,187 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:33,189 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:33,189 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:33,189 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:33,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:33,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:33,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:33,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:33,204 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 8 states. [2019-12-27 15:07:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:33,306 INFO L93 Difference]: Finished difference Result 153 states and 355 transitions. [2019-12-27 15:07:33,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:33,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:33,308 INFO L225 Difference]: With dead ends: 153 [2019-12-27 15:07:33,308 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:07:33,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:07:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 123. [2019-12-27 15:07:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 15:07:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 294 transitions. [2019-12-27 15:07:33,312 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 294 transitions. Word has length 12 [2019-12-27 15:07:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:33,312 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 294 transitions. [2019-12-27 15:07:33,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 294 transitions. [2019-12-27 15:07:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:33,313 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:33,314 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:33,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,518 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 34 times [2019-12-27 15:07:33,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:33,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713726253] [2019-12-27 15:07:33,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713726253] [2019-12-27 15:07:33,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063600791] [2019-12-27 15:07:33,582 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:33,630 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:33,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:33,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:33,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:33,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:33,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:33,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1163244308] [2019-12-27 15:07:33,708 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:33,709 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:33,710 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:33,711 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:33,711 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:33,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:33,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:33,711 INFO L87 Difference]: Start difference. First operand 123 states and 294 transitions. Second operand 8 states. [2019-12-27 15:07:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:33,802 INFO L93 Difference]: Finished difference Result 155 states and 357 transitions. [2019-12-27 15:07:33,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:33,802 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:33,804 INFO L225 Difference]: With dead ends: 155 [2019-12-27 15:07:33,804 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 15:07:33,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 15:07:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2019-12-27 15:07:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 15:07:33,808 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-27 15:07:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:33,809 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 15:07:33,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 15:07:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:33,809 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:33,810 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:34,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,013 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 35 times [2019-12-27 15:07:34,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:34,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705699586] [2019-12-27 15:07:34,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705699586] [2019-12-27 15:07:34,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260439086] [2019-12-27 15:07:34,078 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,133 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:34,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:34,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:34,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [568747052] [2019-12-27 15:07:34,208 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,209 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,211 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:34,211 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,211 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:34,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:34,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:34,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:34,212 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 8 states. [2019-12-27 15:07:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,319 INFO L93 Difference]: Finished difference Result 155 states and 360 transitions. [2019-12-27 15:07:34,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:34,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,321 INFO L225 Difference]: With dead ends: 155 [2019-12-27 15:07:34,321 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 15:07:34,322 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 15:07:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2019-12-27 15:07:34,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-27 15:07:34,326 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-27 15:07:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,326 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-27 15:07:34,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-27 15:07:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:34,327 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,327 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:34,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,530 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 36 times [2019-12-27 15:07:34,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:34,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704998363] [2019-12-27 15:07:34,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704998363] [2019-12-27 15:07:34,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223724066] [2019-12-27 15:07:34,598 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:34,641 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:34,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:34,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:34,642 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:34,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:34,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:34,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1964905421] [2019-12-27 15:07:34,724 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:34,725 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:34,727 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:34,727 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:34,727 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:34,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:34,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:34,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:34,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:34,728 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 8 states. [2019-12-27 15:07:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:34,832 INFO L93 Difference]: Finished difference Result 154 states and 356 transitions. [2019-12-27 15:07:34,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:34,833 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:34,834 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:07:34,834 INFO L226 Difference]: Without dead ends: 153 [2019-12-27 15:07:34,834 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-27 15:07:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 125. [2019-12-27 15:07:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2019-12-27 15:07:34,837 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 12 [2019-12-27 15:07:34,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:34,838 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2019-12-27 15:07:34,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2019-12-27 15:07:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:34,838 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:34,839 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,042 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280155, now seen corresponding path program 37 times [2019-12-27 15:07:35,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026462040] [2019-12-27 15:07:35,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026462040] [2019-12-27 15:07:35,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361844958] [2019-12-27 15:07:35,105 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:35,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [191241520] [2019-12-27 15:07:35,234 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,235 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,237 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:07:35,237 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,237 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:35,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:35,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:35,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:35,238 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand 8 states. [2019-12-27 15:07:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,329 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2019-12-27 15:07:35,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,331 INFO L225 Difference]: With dead ends: 143 [2019-12-27 15:07:35,331 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 15:07:35,332 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 15:07:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2019-12-27 15:07:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 15:07:35,336 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-27 15:07:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,336 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 15:07:35,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 15:07:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,337 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,337 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:35,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,540 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:35,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1542513096, now seen corresponding path program 38 times [2019-12-27 15:07:35,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:35,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580974559] [2019-12-27 15:07:35,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580974559] [2019-12-27 15:07:35,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022502871] [2019-12-27 15:07:35,640 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:35,688 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:35,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:35,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:35,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:35,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:35,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:35,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1978482226] [2019-12-27 15:07:35,768 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:35,769 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:35,772 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 42 transitions. [2019-12-27 15:07:35,772 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:35,775 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:07:35,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:35,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:35,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:35,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:35,776 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 8 states. [2019-12-27 15:07:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:35,889 INFO L93 Difference]: Finished difference Result 148 states and 335 transitions. [2019-12-27 15:07:35,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:35,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:35,891 INFO L225 Difference]: With dead ends: 148 [2019-12-27 15:07:35,891 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 15:07:35,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 15:07:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2019-12-27 15:07:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 15:07:35,895 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-27 15:07:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:35,895 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 15:07:35,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 15:07:35,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:35,896 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:35,896 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:36,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,097 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517746, now seen corresponding path program 39 times [2019-12-27 15:07:36,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:36,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249916242] [2019-12-27 15:07:36,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249916242] [2019-12-27 15:07:36,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172941279] [2019-12-27 15:07:36,166 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:36,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:36,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:36,210 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [934352925] [2019-12-27 15:07:36,353 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,354 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,356 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:36,356 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,358 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:36,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,359 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 8 states. [2019-12-27 15:07:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:36,525 INFO L93 Difference]: Finished difference Result 156 states and 352 transitions. [2019-12-27 15:07:36,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:36,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:36,528 INFO L225 Difference]: With dead ends: 156 [2019-12-27 15:07:36,528 INFO L226 Difference]: Without dead ends: 155 [2019-12-27 15:07:36,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-12-27 15:07:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2019-12-27 15:07:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 15:07:36,532 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-27 15:07:36,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:36,532 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 15:07:36,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:36,532 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 15:07:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:36,533 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:36,533 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:36,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,736 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1542517901, now seen corresponding path program 40 times [2019-12-27 15:07:36,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:36,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059296569] [2019-12-27 15:07:36,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059296569] [2019-12-27 15:07:36,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640853995] [2019-12-27 15:07:36,804 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:36,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:36,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:36,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:36,849 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:36,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:36,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:36,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [224264298] [2019-12-27 15:07:36,928 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:36,929 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:36,931 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 36 transitions. [2019-12-27 15:07:36,932 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:36,933 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:07:36,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:36,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:36,934 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 8 states. [2019-12-27 15:07:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:37,062 INFO L93 Difference]: Finished difference Result 155 states and 351 transitions. [2019-12-27 15:07:37,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:37,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:37,063 INFO L225 Difference]: With dead ends: 155 [2019-12-27 15:07:37,063 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 15:07:37,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 15:07:37,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2019-12-27 15:07:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 15:07:37,066 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-27 15:07:37,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:37,066 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 15:07:37,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:37,066 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 15:07:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:37,066 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:37,067 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:37,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,267 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1542661896, now seen corresponding path program 41 times [2019-12-27 15:07:37,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:37,268 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213723046] [2019-12-27 15:07:37,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213723046] [2019-12-27 15:07:37,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594442894] [2019-12-27 15:07:37,328 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:37,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:37,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:37,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:37,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:37,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1485240076] [2019-12-27 15:07:37,497 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:37,497 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:37,499 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:37,499 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:37,501 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:37,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:37,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:37,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:37,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:37,502 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 8 states. [2019-12-27 15:07:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:37,637 INFO L93 Difference]: Finished difference Result 157 states and 353 transitions. [2019-12-27 15:07:37,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:37,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:37,639 INFO L225 Difference]: With dead ends: 157 [2019-12-27 15:07:37,639 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 15:07:37,639 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 15:07:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 126. [2019-12-27 15:07:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:07:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 15:07:37,643 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-27 15:07:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:37,644 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 15:07:37,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 15:07:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:37,644 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:37,644 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:37,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,848 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1542662051, now seen corresponding path program 42 times [2019-12-27 15:07:37,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:37,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165406488] [2019-12-27 15:07:37,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:37,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165406488] [2019-12-27 15:07:37,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099404358] [2019-12-27 15:07:37,930 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:37,976 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:37,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:37,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:37,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2069093462] [2019-12-27 15:07:38,122 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,122 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,125 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:38,125 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,127 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:38,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,128 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 8 states. [2019-12-27 15:07:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,329 INFO L93 Difference]: Finished difference Result 157 states and 356 transitions. [2019-12-27 15:07:38,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:38,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,330 INFO L225 Difference]: With dead ends: 157 [2019-12-27 15:07:38,331 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 15:07:38,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 15:07:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 125. [2019-12-27 15:07:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 15:07:38,335 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-27 15:07:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,335 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 15:07:38,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 15:07:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:38,336 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,336 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:38,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,539 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666701, now seen corresponding path program 43 times [2019-12-27 15:07:38,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:38,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082980600] [2019-12-27 15:07:38,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082980600] [2019-12-27 15:07:38,612 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040169095] [2019-12-27 15:07:38,612 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:38,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:38,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:38,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:38,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:38,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [498030688] [2019-12-27 15:07:38,751 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:38,752 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:38,753 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:38,754 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:38,755 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:38,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:38,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:38,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:38,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:38,755 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 8 states. [2019-12-27 15:07:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:38,888 INFO L93 Difference]: Finished difference Result 158 states and 357 transitions. [2019-12-27 15:07:38,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:38,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:38,890 INFO L225 Difference]: With dead ends: 158 [2019-12-27 15:07:38,890 INFO L226 Difference]: Without dead ends: 157 [2019-12-27 15:07:38,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-27 15:07:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 126. [2019-12-27 15:07:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:07:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 15:07:38,896 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-27 15:07:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:38,896 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 15:07:38,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 15:07:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:38,897 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:38,897 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,098 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666856, now seen corresponding path program 44 times [2019-12-27 15:07:39,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920043110] [2019-12-27 15:07:39,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920043110] [2019-12-27 15:07:39,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386406563] [2019-12-27 15:07:39,163 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:39,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:39,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:39,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1272825318] [2019-12-27 15:07:39,329 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,330 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,332 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 30 transitions. [2019-12-27 15:07:39,332 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,334 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:07:39,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:39,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:39,335 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 8 states. [2019-12-27 15:07:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:39,447 INFO L93 Difference]: Finished difference Result 150 states and 340 transitions. [2019-12-27 15:07:39,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:39,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:39,449 INFO L225 Difference]: With dead ends: 150 [2019-12-27 15:07:39,449 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 15:07:39,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 15:07:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 124. [2019-12-27 15:07:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 15:07:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2019-12-27 15:07:39,453 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 12 [2019-12-27 15:07:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:39,453 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2019-12-27 15:07:39,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2019-12-27 15:07:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:39,454 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:39,454 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:39,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,657 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130546, now seen corresponding path program 45 times [2019-12-27 15:07:39,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:39,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234849591] [2019-12-27 15:07:39,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234849591] [2019-12-27 15:07:39,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183679229] [2019-12-27 15:07:39,724 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:39,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:39,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:39,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:39,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:39,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:39,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:39,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [842070370] [2019-12-27 15:07:39,898 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:39,899 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:39,902 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:39,902 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:39,904 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:39,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:39,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:39,905 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand 8 states. [2019-12-27 15:07:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:40,048 INFO L93 Difference]: Finished difference Result 157 states and 356 transitions. [2019-12-27 15:07:40,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:40,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:40,050 INFO L225 Difference]: With dead ends: 157 [2019-12-27 15:07:40,050 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 15:07:40,050 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 15:07:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 127. [2019-12-27 15:07:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:07:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-27 15:07:40,055 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-27 15:07:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:40,056 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-27 15:07:40,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:40,056 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-27 15:07:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:40,057 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:40,057 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:40,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,261 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:40,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1547130701, now seen corresponding path program 46 times [2019-12-27 15:07:40,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:40,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122248213] [2019-12-27 15:07:40,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122248213] [2019-12-27 15:07:40,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978676344] [2019-12-27 15:07:40,341 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:40,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:40,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:40,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:40,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:40,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2065837454] [2019-12-27 15:07:40,475 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:40,476 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:40,477 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:40,478 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:40,478 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:40,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:40,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:40,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:40,479 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 8 states. [2019-12-27 15:07:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:40,621 INFO L93 Difference]: Finished difference Result 160 states and 368 transitions. [2019-12-27 15:07:40,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:40,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:40,623 INFO L225 Difference]: With dead ends: 160 [2019-12-27 15:07:40,623 INFO L226 Difference]: Without dead ends: 159 [2019-12-27 15:07:40,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-27 15:07:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 126. [2019-12-27 15:07:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:07:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 15:07:40,627 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-27 15:07:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:40,627 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 15:07:40,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 15:07:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:40,628 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:40,628 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:40,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,831 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:40,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:40,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 47 times [2019-12-27 15:07:40,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:40,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245381352] [2019-12-27 15:07:40,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:40,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245381352] [2019-12-27 15:07:40,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714241858] [2019-12-27 15:07:40,905 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:40,946 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:40,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:40,947 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:40,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:41,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:41,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [369564536] [2019-12-27 15:07:41,021 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:41,022 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:41,024 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:41,024 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:41,025 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:41,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:41,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:41,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:41,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:41,026 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 8 states. [2019-12-27 15:07:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:41,158 INFO L93 Difference]: Finished difference Result 157 states and 359 transitions. [2019-12-27 15:07:41,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:41,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:41,159 INFO L225 Difference]: With dead ends: 157 [2019-12-27 15:07:41,159 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 15:07:41,159 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 15:07:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 127. [2019-12-27 15:07:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:07:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-27 15:07:41,162 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-27 15:07:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:41,163 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-27 15:07:41,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-27 15:07:41,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:41,163 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:41,164 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:41,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,367 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135506, now seen corresponding path program 48 times [2019-12-27 15:07:41,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:41,367 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963709825] [2019-12-27 15:07:41,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963709825] [2019-12-27 15:07:41,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295975687] [2019-12-27 15:07:41,429 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,472 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:07:41,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:41,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:41,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:41,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:41,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [821999255] [2019-12-27 15:07:41,549 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:41,550 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:41,551 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:41,551 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:41,552 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:41,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:41,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:41,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:41,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:41,552 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 8 states. [2019-12-27 15:07:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:41,684 INFO L93 Difference]: Finished difference Result 160 states and 368 transitions. [2019-12-27 15:07:41,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:41,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:41,686 INFO L225 Difference]: With dead ends: 160 [2019-12-27 15:07:41,686 INFO L226 Difference]: Without dead ends: 159 [2019-12-27 15:07:41,687 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-27 15:07:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 125. [2019-12-27 15:07:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 15:07:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 299 transitions. [2019-12-27 15:07:41,690 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 299 transitions. Word has length 12 [2019-12-27 15:07:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:41,691 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 299 transitions. [2019-12-27 15:07:41,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 299 transitions. [2019-12-27 15:07:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:41,691 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:41,691 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:41,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:41,895 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279501, now seen corresponding path program 49 times [2019-12-27 15:07:41,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:41,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417474191] [2019-12-27 15:07:41,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:41,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417474191] [2019-12-27 15:07:41,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423537754] [2019-12-27 15:07:41,972 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:42,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:42,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1335095845] [2019-12-27 15:07:42,085 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,086 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,088 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:42,089 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,090 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:42,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:42,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:42,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:42,091 INFO L87 Difference]: Start difference. First operand 125 states and 299 transitions. Second operand 8 states. [2019-12-27 15:07:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,212 INFO L93 Difference]: Finished difference Result 161 states and 366 transitions. [2019-12-27 15:07:42,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:42,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:42,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,214 INFO L225 Difference]: With dead ends: 161 [2019-12-27 15:07:42,214 INFO L226 Difference]: Without dead ends: 160 [2019-12-27 15:07:42,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-27 15:07:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 127. [2019-12-27 15:07:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:07:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-27 15:07:42,217 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-27 15:07:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,218 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-27 15:07:42,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-27 15:07:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:42,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,219 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:42,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,422 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:42,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1547279656, now seen corresponding path program 50 times [2019-12-27 15:07:42,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:42,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004926010] [2019-12-27 15:07:42,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004926010] [2019-12-27 15:07:42,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477245191] [2019-12-27 15:07:42,494 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:42,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:42,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:42,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:42,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:42,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:42,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:42,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157989488] [2019-12-27 15:07:42,652 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:42,653 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:42,654 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:42,655 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:42,655 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:42,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:42,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:42,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:42,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:42,656 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 8 states. [2019-12-27 15:07:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:42,802 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2019-12-27 15:07:42,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:42,803 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:42,804 INFO L225 Difference]: With dead ends: 161 [2019-12-27 15:07:42,804 INFO L226 Difference]: Without dead ends: 160 [2019-12-27 15:07:42,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-27 15:07:42,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 126. [2019-12-27 15:07:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-12-27 15:07:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2019-12-27 15:07:42,807 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 12 [2019-12-27 15:07:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:42,808 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2019-12-27 15:07:42,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2019-12-27 15:07:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:42,808 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:42,808 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,009 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284306, now seen corresponding path program 51 times [2019-12-27 15:07:43,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,011 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897914292] [2019-12-27 15:07:43,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897914292] [2019-12-27 15:07:43,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56416782] [2019-12-27 15:07:43,078 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:43,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:43,120 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:43,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1776747079] [2019-12-27 15:07:43,177 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,178 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,180 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:43,180 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,181 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:43,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:43,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:43,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:43,181 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand 8 states. [2019-12-27 15:07:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:43,304 INFO L93 Difference]: Finished difference Result 155 states and 354 transitions. [2019-12-27 15:07:43,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:43,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:43,306 INFO L225 Difference]: With dead ends: 155 [2019-12-27 15:07:43,306 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 15:07:43,306 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 15:07:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 127. [2019-12-27 15:07:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 15:07:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2019-12-27 15:07:43,310 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 12 [2019-12-27 15:07:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:43,311 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2019-12-27 15:07:43,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2019-12-27 15:07:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:43,311 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:43,311 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,513 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 52 times [2019-12-27 15:07:43,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293266795] [2019-12-27 15:07:43,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293266795] [2019-12-27 15:07:43,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675051790] [2019-12-27 15:07:43,568 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,610 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:43,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:43,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:07:43,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:43,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:43,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 15:07:43,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [959605312] [2019-12-27 15:07:43,679 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:43,680 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:43,681 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:07:43,681 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:43,682 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:07:43,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:07:43,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:43,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:07:43,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:07:43,682 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand 8 states. [2019-12-27 15:07:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:43,789 INFO L93 Difference]: Finished difference Result 142 states and 326 transitions. [2019-12-27 15:07:43,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:07:43,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:07:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:43,790 INFO L225 Difference]: With dead ends: 142 [2019-12-27 15:07:43,790 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 15:07:43,790 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 15:07:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2019-12-27 15:07:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 15:07:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 299 transitions. [2019-12-27 15:07:43,793 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 299 transitions. Word has length 12 [2019-12-27 15:07:43,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:43,793 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 299 transitions. [2019-12-27 15:07:43,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:07:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 299 transitions. [2019-12-27 15:07:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:07:43,794 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:43,794 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:43,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:43,995 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:43,995 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-27 15:07:43,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:43,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219046911] [2019-12-27 15:07:43,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219046911] [2019-12-27 15:07:44,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452066634] [2019-12-27 15:07:44,086 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,130 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:07:44,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:44,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:44,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:44,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1486042837] [2019-12-27 15:07:44,213 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,214 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,216 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 40 transitions. [2019-12-27 15:07:44,216 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,219 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:07:44,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:44,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:44,220 INFO L87 Difference]: Start difference. First operand 128 states and 299 transitions. Second operand 9 states. [2019-12-27 15:07:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,362 INFO L93 Difference]: Finished difference Result 143 states and 324 transitions. [2019-12-27 15:07:44,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:44,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-12-27 15:07:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,364 INFO L225 Difference]: With dead ends: 143 [2019-12-27 15:07:44,364 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 15:07:44,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:07:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 15:07:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2019-12-27 15:07:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 15:07:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 313 transitions. [2019-12-27 15:07:44,368 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 313 transitions. Word has length 12 [2019-12-27 15:07:44,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,368 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 313 transitions. [2019-12-27 15:07:44,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 313 transitions. [2019-12-27 15:07:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:44,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,368 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:44,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,569 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:44,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 53 times [2019-12-27 15:07:44,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:44,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978121321] [2019-12-27 15:07:44,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978121321] [2019-12-27 15:07:44,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576683176] [2019-12-27 15:07:44,638 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:44,678 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:44,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:44,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:44,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:44,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:44,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:44,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [528583117] [2019-12-27 15:07:44,814 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:44,815 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:44,818 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 29 transitions. [2019-12-27 15:07:44,819 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:44,819 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:44,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:44,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:44,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:44,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:44,820 INFO L87 Difference]: Start difference. First operand 133 states and 313 transitions. Second operand 9 states. [2019-12-27 15:07:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:44,848 INFO L93 Difference]: Finished difference Result 154 states and 348 transitions. [2019-12-27 15:07:44,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:44,848 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:44,849 INFO L225 Difference]: With dead ends: 154 [2019-12-27 15:07:44,850 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 15:07:44,850 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 15:07:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2019-12-27 15:07:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-12-27 15:07:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 314 transitions. [2019-12-27 15:07:44,853 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 314 transitions. Word has length 13 [2019-12-27 15:07:44,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:44,854 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 314 transitions. [2019-12-27 15:07:44,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:44,854 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 314 transitions. [2019-12-27 15:07:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:44,854 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:44,855 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:45,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,058 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 54 times [2019-12-27 15:07:45,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:45,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384224480] [2019-12-27 15:07:45,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:45,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384224480] [2019-12-27 15:07:45,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377204151] [2019-12-27 15:07:45,186 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,254 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:45,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:45,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:45,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:45,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:45,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:45,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1272392167] [2019-12-27 15:07:45,409 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:45,410 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:45,413 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:07:45,413 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:45,413 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:45,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:45,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:45,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:45,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:45,414 INFO L87 Difference]: Start difference. First operand 133 states and 314 transitions. Second operand 9 states. [2019-12-27 15:07:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:45,486 INFO L93 Difference]: Finished difference Result 163 states and 369 transitions. [2019-12-27 15:07:45,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:45,487 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:45,488 INFO L225 Difference]: With dead ends: 163 [2019-12-27 15:07:45,488 INFO L226 Difference]: Without dead ends: 162 [2019-12-27 15:07:45,489 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:07:45,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-27 15:07:45,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2019-12-27 15:07:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 15:07:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 318 transitions. [2019-12-27 15:07:45,494 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 318 transitions. Word has length 13 [2019-12-27 15:07:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:45,494 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 318 transitions. [2019-12-27 15:07:45,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:45,495 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 318 transitions. [2019-12-27 15:07:45,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:45,496 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:45,496 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:45,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,701 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 55 times [2019-12-27 15:07:45,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:45,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193075513] [2019-12-27 15:07:45,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:45,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193075513] [2019-12-27 15:07:45,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751247256] [2019-12-27 15:07:45,774 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:45,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:45,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:47,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:47,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:47,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1750116467] [2019-12-27 15:07:47,299 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:47,300 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:47,302 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 27 transitions. [2019-12-27 15:07:47,302 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:47,302 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:47,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:47,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:47,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:47,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=154, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:07:47,303 INFO L87 Difference]: Start difference. First operand 134 states and 318 transitions. Second operand 9 states. [2019-12-27 15:07:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:47,356 INFO L93 Difference]: Finished difference Result 163 states and 367 transitions. [2019-12-27 15:07:47,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:47,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:47,358 INFO L225 Difference]: With dead ends: 163 [2019-12-27 15:07:47,358 INFO L226 Difference]: Without dead ends: 160 [2019-12-27 15:07:47,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=171, Unknown=1, NotChecked=0, Total=272 [2019-12-27 15:07:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-27 15:07:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2019-12-27 15:07:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 15:07:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 317 transitions. [2019-12-27 15:07:47,362 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 317 transitions. Word has length 13 [2019-12-27 15:07:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:47,363 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 317 transitions. [2019-12-27 15:07:47,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 317 transitions. [2019-12-27 15:07:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:47,363 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:47,363 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:47,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:47,566 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:47,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:47,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 56 times [2019-12-27 15:07:47,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:47,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033944718] [2019-12-27 15:07:47,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:47,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033944718] [2019-12-27 15:07:47,638 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106986324] [2019-12-27 15:07:47,638 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:47,681 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:47,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:47,682 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:47,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:47,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:47,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:47,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [604501213] [2019-12-27 15:07:47,774 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:47,775 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:47,777 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:47,777 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:47,777 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:47,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:47,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:47,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:47,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:47,778 INFO L87 Difference]: Start difference. First operand 134 states and 317 transitions. Second operand 9 states. [2019-12-27 15:07:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:47,846 INFO L93 Difference]: Finished difference Result 167 states and 378 transitions. [2019-12-27 15:07:47,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:47,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:47,848 INFO L225 Difference]: With dead ends: 167 [2019-12-27 15:07:47,848 INFO L226 Difference]: Without dead ends: 166 [2019-12-27 15:07:47,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-27 15:07:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 136. [2019-12-27 15:07:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 15:07:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-27 15:07:47,851 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-27 15:07:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:47,852 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-27 15:07:47,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-27 15:07:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:47,852 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:47,853 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:48,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:48,056 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 57 times [2019-12-27 15:07:48,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:48,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80684067] [2019-12-27 15:07:48,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:48,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80684067] [2019-12-27 15:07:48,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539976939] [2019-12-27 15:07:48,125 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:48,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:07:48,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:48,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:48,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:48,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:48,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:48,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [166541989] [2019-12-27 15:07:48,663 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:48,664 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:48,666 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:48,666 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:48,666 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:48,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:48,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:48,667 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 9 states. [2019-12-27 15:07:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:48,743 INFO L93 Difference]: Finished difference Result 175 states and 399 transitions. [2019-12-27 15:07:48,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:48,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:48,745 INFO L225 Difference]: With dead ends: 175 [2019-12-27 15:07:48,745 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:07:48,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:07:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:07:48,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 135. [2019-12-27 15:07:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 15:07:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 321 transitions. [2019-12-27 15:07:48,749 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 321 transitions. Word has length 13 [2019-12-27 15:07:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:48,749 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 321 transitions. [2019-12-27 15:07:48,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 321 transitions. [2019-12-27 15:07:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:48,749 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:48,749 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:48,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:48,950 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:48,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 58 times [2019-12-27 15:07:48,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:48,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754512218] [2019-12-27 15:07:48,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:49,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754512218] [2019-12-27 15:07:49,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921154076] [2019-12-27 15:07:49,017 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:49,056 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:49,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:49,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:49,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:49,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:49,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:49,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [587339568] [2019-12-27 15:07:49,897 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:49,898 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:49,909 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:49,909 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:49,909 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:49,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:49,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=157, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:07:49,910 INFO L87 Difference]: Start difference. First operand 135 states and 321 transitions. Second operand 9 states. [2019-12-27 15:07:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:50,764 INFO L93 Difference]: Finished difference Result 172 states and 390 transitions. [2019-12-27 15:07:50,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:50,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:50,766 INFO L225 Difference]: With dead ends: 172 [2019-12-27 15:07:50,766 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 15:07:50,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=192, Unknown=4, NotChecked=0, Total=306 [2019-12-27 15:07:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 15:07:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2019-12-27 15:07:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 15:07:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 325 transitions. [2019-12-27 15:07:50,770 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 325 transitions. Word has length 13 [2019-12-27 15:07:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:50,771 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 325 transitions. [2019-12-27 15:07:50,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 325 transitions. [2019-12-27 15:07:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:50,771 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:50,771 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:50,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:50,974 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:50,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 59 times [2019-12-27 15:07:50,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:50,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339401453] [2019-12-27 15:07:50,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:51,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339401453] [2019-12-27 15:07:51,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850563928] [2019-12-27 15:07:51,044 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:51,086 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:51,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:51,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:51,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:52,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:52,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:52,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [604729357] [2019-12-27 15:07:52,578 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:52,578 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:52,580 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:07:52,580 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:52,580 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:52,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:52,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:52,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:52,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=152, Unknown=2, NotChecked=0, Total=240 [2019-12-27 15:07:52,581 INFO L87 Difference]: Start difference. First operand 136 states and 325 transitions. Second operand 9 states. [2019-12-27 15:07:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:53,233 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2019-12-27 15:07:53,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:53,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:53,235 INFO L225 Difference]: With dead ends: 166 [2019-12-27 15:07:53,235 INFO L226 Difference]: Without dead ends: 162 [2019-12-27 15:07:53,235 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=115, Invalid=188, Unknown=3, NotChecked=0, Total=306 [2019-12-27 15:07:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-27 15:07:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 135. [2019-12-27 15:07:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-12-27 15:07:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 320 transitions. [2019-12-27 15:07:53,238 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 320 transitions. Word has length 13 [2019-12-27 15:07:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:53,238 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 320 transitions. [2019-12-27 15:07:53,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 320 transitions. [2019-12-27 15:07:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:53,239 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:53,239 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,440 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828976, now seen corresponding path program 60 times [2019-12-27 15:07:53,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939451450] [2019-12-27 15:07:53,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:53,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939451450] [2019-12-27 15:07:53,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051245651] [2019-12-27 15:07:53,518 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,561 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:53,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:53,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:53,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:53,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:53,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:53,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2111835537] [2019-12-27 15:07:53,663 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:53,664 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:53,666 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:53,666 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:53,666 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:53,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:53,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:53,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:53,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:53,666 INFO L87 Difference]: Start difference. First operand 135 states and 320 transitions. Second operand 9 states. [2019-12-27 15:07:53,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:53,753 INFO L93 Difference]: Finished difference Result 165 states and 375 transitions. [2019-12-27 15:07:53,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:53,753 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:53,754 INFO L225 Difference]: With dead ends: 165 [2019-12-27 15:07:53,755 INFO L226 Difference]: Without dead ends: 164 [2019-12-27 15:07:53,755 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-27 15:07:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 138. [2019-12-27 15:07:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:07:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-27 15:07:53,758 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-27 15:07:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:53,758 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-27 15:07:53,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-27 15:07:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:53,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:53,759 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:53,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:53,960 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 61 times [2019-12-27 15:07:53,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:53,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592321812] [2019-12-27 15:07:53,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:54,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592321812] [2019-12-27 15:07:54,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362626913] [2019-12-27 15:07:54,031 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:54,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:54,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:54,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:54,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:54,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [846191624] [2019-12-27 15:07:54,185 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:54,186 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:54,188 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:54,188 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:54,188 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:54,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:54,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:54,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:54,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:54,189 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 9 states. [2019-12-27 15:07:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:54,300 INFO L93 Difference]: Finished difference Result 180 states and 416 transitions. [2019-12-27 15:07:54,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:54,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:54,302 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:07:54,302 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:07:54,303 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:07:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2019-12-27 15:07:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 15:07:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-27 15:07:54,306 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 13 [2019-12-27 15:07:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:54,306 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-27 15:07:54,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-27 15:07:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:54,307 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:54,307 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:54,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,510 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:54,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:54,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 62 times [2019-12-27 15:07:54,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:54,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660111299] [2019-12-27 15:07:54,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:54,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660111299] [2019-12-27 15:07:54,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687348266] [2019-12-27 15:07:54,582 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:54,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:07:54,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:54,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:54,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:54,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:54,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:54,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1268963771] [2019-12-27 15:07:54,736 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:54,736 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:54,738 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:54,738 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:54,738 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:54,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:54,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:54,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:54,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:54,739 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 9 states. [2019-12-27 15:07:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:54,881 INFO L93 Difference]: Finished difference Result 182 states and 418 transitions. [2019-12-27 15:07:54,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:54,881 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:54,882 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:07:54,882 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:07:54,883 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:07:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2019-12-27 15:07:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:07:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-27 15:07:54,886 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-27 15:07:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:54,887 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-27 15:07:54,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-27 15:07:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:54,887 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:54,887 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:55,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,088 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:55,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 63 times [2019-12-27 15:07:55,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:55,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153763219] [2019-12-27 15:07:55,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:55,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153763219] [2019-12-27 15:07:55,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736868231] [2019-12-27 15:07:55,155 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,204 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:07:55,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:55,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:55,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:55,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:55,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:55,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [528433116] [2019-12-27 15:07:55,356 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:55,357 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:55,358 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:55,358 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:55,359 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:55,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:55,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:55,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:55,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:55,359 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 9 states. [2019-12-27 15:07:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:55,478 INFO L93 Difference]: Finished difference Result 178 states and 409 transitions. [2019-12-27 15:07:55,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:55,478 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:55,480 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:07:55,480 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:07:55,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:07:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2019-12-27 15:07:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 15:07:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 324 transitions. [2019-12-27 15:07:55,484 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 324 transitions. Word has length 13 [2019-12-27 15:07:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:55,484 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 324 transitions. [2019-12-27 15:07:55,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 324 transitions. [2019-12-27 15:07:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:55,485 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:55,485 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:55,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,690 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 64 times [2019-12-27 15:07:55,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:55,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790888008] [2019-12-27 15:07:55,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:55,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790888008] [2019-12-27 15:07:55,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093943237] [2019-12-27 15:07:55,767 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:55,809 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:07:55,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:55,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:55,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:55,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:55,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:55,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [799012383] [2019-12-27 15:07:55,952 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:55,953 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:55,955 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:55,955 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:55,955 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:55,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:55,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:55,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:55,956 INFO L87 Difference]: Start difference. First operand 136 states and 324 transitions. Second operand 9 states. [2019-12-27 15:07:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:56,106 INFO L93 Difference]: Finished difference Result 178 states and 408 transitions. [2019-12-27 15:07:56,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:56,107 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:56,108 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:07:56,108 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:07:56,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:07:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 138. [2019-12-27 15:07:56,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:07:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-27 15:07:56,112 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-27 15:07:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:56,112 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-27 15:07:56,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:56,113 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-27 15:07:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:56,113 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:56,113 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:56,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,317 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 65 times [2019-12-27 15:07:56,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:56,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440435016] [2019-12-27 15:07:56,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:56,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440435016] [2019-12-27 15:07:56,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760459003] [2019-12-27 15:07:56,428 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:56,491 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:07:56,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:56,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:56,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:56,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:56,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:56,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1649890001] [2019-12-27 15:07:56,692 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:56,693 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:56,696 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:56,696 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:56,697 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:56,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:56,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:56,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:56,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:56,698 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 9 states. [2019-12-27 15:07:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:56,831 INFO L93 Difference]: Finished difference Result 176 states and 404 transitions. [2019-12-27 15:07:56,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:56,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:56,833 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:07:56,833 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:07:56,833 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:07:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:07:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2019-12-27 15:07:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 15:07:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 328 transitions. [2019-12-27 15:07:56,836 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 328 transitions. Word has length 13 [2019-12-27 15:07:56,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:56,837 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 328 transitions. [2019-12-27 15:07:56,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 328 transitions. [2019-12-27 15:07:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:56,837 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:56,837 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:57,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,041 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 66 times [2019-12-27 15:07:57,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:57,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664487484] [2019-12-27 15:07:57,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:57,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664487484] [2019-12-27 15:07:57,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958109316] [2019-12-27 15:07:57,112 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:57,154 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:07:57,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:07:57,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:57,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:57,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:57,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:57,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1360652361] [2019-12-27 15:07:57,316 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:57,317 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:57,318 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:57,318 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:57,318 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:57,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:57,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:57,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:57,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:57,319 INFO L87 Difference]: Start difference. First operand 137 states and 328 transitions. Second operand 9 states. [2019-12-27 15:07:59,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:07:59,462 INFO L93 Difference]: Finished difference Result 175 states and 400 transitions. [2019-12-27 15:07:59,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:07:59,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:07:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:07:59,465 INFO L225 Difference]: With dead ends: 175 [2019-12-27 15:07:59,465 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:07:59,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=124, Invalid=217, Unknown=1, NotChecked=0, Total=342 [2019-12-27 15:07:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:07:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 138. [2019-12-27 15:07:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:07:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 332 transitions. [2019-12-27 15:07:59,469 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 332 transitions. Word has length 13 [2019-12-27 15:07:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:07:59,469 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 332 transitions. [2019-12-27 15:07:59,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:07:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 332 transitions. [2019-12-27 15:07:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:07:59,469 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:07:59,470 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:07:59,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:59,673 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:07:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:07:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675061, now seen corresponding path program 67 times [2019-12-27 15:07:59,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:07:59,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282041725] [2019-12-27 15:07:59,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:07:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:59,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282041725] [2019-12-27 15:07:59,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548818733] [2019-12-27 15:07:59,742 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:07:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:07:59,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:07:59,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:07:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:07:59,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:07:59,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:07:59,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [94959917] [2019-12-27 15:07:59,962 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:07:59,962 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:07:59,966 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 23 transitions. [2019-12-27 15:07:59,966 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:07:59,967 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:07:59,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:07:59,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:07:59,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:07:59,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:07:59,968 INFO L87 Difference]: Start difference. First operand 138 states and 332 transitions. Second operand 9 states. [2019-12-27 15:08:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:00,081 INFO L93 Difference]: Finished difference Result 167 states and 381 transitions. [2019-12-27 15:08:00,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:00,081 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:00,083 INFO L225 Difference]: With dead ends: 167 [2019-12-27 15:08:00,083 INFO L226 Difference]: Without dead ends: 162 [2019-12-27 15:08:00,083 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:08:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-27 15:08:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 136. [2019-12-27 15:08:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 15:08:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 323 transitions. [2019-12-27 15:08:00,086 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 323 transitions. Word has length 13 [2019-12-27 15:08:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:00,087 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 323 transitions. [2019-12-27 15:08:00,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 323 transitions. [2019-12-27 15:08:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:00,087 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:00,088 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:00,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:00,291 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:00,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 68 times [2019-12-27 15:08:00,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:00,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043630472] [2019-12-27 15:08:00,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:00,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043630472] [2019-12-27 15:08:00,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45139252] [2019-12-27 15:08:00,354 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:00,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:00,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:00,400 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:00,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:00,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:00,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:00,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [182907598] [2019-12-27 15:08:00,481 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:00,482 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:00,483 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:00,484 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:00,484 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:00,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:00,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:00,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:00,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:00,484 INFO L87 Difference]: Start difference. First operand 136 states and 323 transitions. Second operand 9 states. [2019-12-27 15:08:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:00,596 INFO L93 Difference]: Finished difference Result 162 states and 365 transitions. [2019-12-27 15:08:00,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:00,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:00,597 INFO L225 Difference]: With dead ends: 162 [2019-12-27 15:08:00,598 INFO L226 Difference]: Without dead ends: 161 [2019-12-27 15:08:00,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-27 15:08:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2019-12-27 15:08:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:00,600 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:00,600 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:00,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:00,601 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:00,601 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:00,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:00,802 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:00,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:00,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118190, now seen corresponding path program 69 times [2019-12-27 15:08:00,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:00,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878046269] [2019-12-27 15:08:00,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:00,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878046269] [2019-12-27 15:08:00,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444971232] [2019-12-27 15:08:00,909 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:00,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:00,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:00,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:00,956 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:01,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:01,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:01,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2127635692] [2019-12-27 15:08:01,041 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:01,042 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:01,044 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:01,044 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:01,044 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:01,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:01,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:01,045 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:01,180 INFO L93 Difference]: Finished difference Result 176 states and 405 transitions. [2019-12-27 15:08:01,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:01,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:01,182 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:08:01,182 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:08:01,183 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:08:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2019-12-27 15:08:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-27 15:08:01,186 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-27 15:08:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:01,186 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-27 15:08:01,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-27 15:08:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:01,187 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:01,187 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:01,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:01,388 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:01,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:01,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122840, now seen corresponding path program 70 times [2019-12-27 15:08:01,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:01,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680087845] [2019-12-27 15:08:01,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:01,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680087845] [2019-12-27 15:08:01,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632676106] [2019-12-27 15:08:01,458 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:01,501 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:01,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:01,502 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:01,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:01,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:01,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:01,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [81754267] [2019-12-27 15:08:01,639 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:01,640 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:01,642 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:01,642 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:01,642 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:01,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:01,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:01,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:01,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:01,643 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 9 states. [2019-12-27 15:08:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:01,813 INFO L93 Difference]: Finished difference Result 181 states and 416 transitions. [2019-12-27 15:08:01,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:01,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:01,815 INFO L225 Difference]: With dead ends: 181 [2019-12-27 15:08:01,815 INFO L226 Difference]: Without dead ends: 180 [2019-12-27 15:08:01,816 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-12-27 15:08:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 141. [2019-12-27 15:08:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:01,818 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:01,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:01,819 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:01,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:01,819 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:01,819 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:01,819 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:02,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,020 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1571122995, now seen corresponding path program 71 times [2019-12-27 15:08:02,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:02,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136778640] [2019-12-27 15:08:02,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:02,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136778640] [2019-12-27 15:08:02,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305754743] [2019-12-27 15:08:02,091 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,132 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:02,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:02,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:02,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:02,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:02,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:02,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562412360] [2019-12-27 15:08:02,220 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:02,221 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:02,223 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:02,223 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:02,223 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:02,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:02,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:02,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:02,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:02,224 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:02,361 INFO L93 Difference]: Finished difference Result 179 states and 413 transitions. [2019-12-27 15:08:02,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:02,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:02,363 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:08:02,364 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:08:02,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:08:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 139. [2019-12-27 15:08:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2019-12-27 15:08:02,367 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 13 [2019-12-27 15:08:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:02,367 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2019-12-27 15:08:02,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2019-12-27 15:08:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:02,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:02,368 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:02,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,569 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:02,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:02,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 72 times [2019-12-27 15:08:02,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:02,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895057503] [2019-12-27 15:08:02,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:02,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895057503] [2019-12-27 15:08:02,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071650673] [2019-12-27 15:08:02,652 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:02,695 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:02,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:02,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:02,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:03,278 WARN L192 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:08:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:03,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:03,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:03,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1038833313] [2019-12-27 15:08:03,282 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:03,283 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:03,284 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:03,284 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:03,285 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:03,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:03,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:03,285 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand 9 states. [2019-12-27 15:08:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:03,440 INFO L93 Difference]: Finished difference Result 186 states and 427 transitions. [2019-12-27 15:08:03,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:03,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:03,442 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:08:03,442 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 15:08:03,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:03,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 15:08:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2019-12-27 15:08:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:03,446 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:03,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:03,446 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:03,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:03,447 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:03,447 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:03,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,651 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:03,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:03,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 73 times [2019-12-27 15:08:03,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:03,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242523587] [2019-12-27 15:08:03,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:03,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242523587] [2019-12-27 15:08:03,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142382499] [2019-12-27 15:08:03,733 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:03,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:03,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:04,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:04,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:04,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [782463692] [2019-12-27 15:08:04,348 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:04,349 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:04,351 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:04,351 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:04,351 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:04,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:04,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:04,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:04,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:04,352 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:04,704 INFO L93 Difference]: Finished difference Result 183 states and 423 transitions. [2019-12-27 15:08:04,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:04,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:04,706 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:08:04,706 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:08:04,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:04,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:08:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-12-27 15:08:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-27 15:08:04,710 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-27 15:08:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:04,711 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-27 15:08:04,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-27 15:08:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:04,711 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:04,711 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:04,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:04,912 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 74 times [2019-12-27 15:08:04,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:04,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072386412] [2019-12-27 15:08:04,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072386412] [2019-12-27 15:08:05,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518417974] [2019-12-27 15:08:05,025 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,090 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:05,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:05,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:05,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:05,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:05,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [252083998] [2019-12-27 15:08:05,250 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:05,251 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:05,254 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:05,254 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:05,255 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:05,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:05,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:05,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:05,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:05,256 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 9 states. [2019-12-27 15:08:05,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:05,420 INFO L93 Difference]: Finished difference Result 185 states and 427 transitions. [2019-12-27 15:08:05,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:05,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:05,422 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:05,422 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:05,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2019-12-27 15:08:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:05,425 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:05,426 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:05,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:05,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:05,426 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:05,426 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:05,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,627 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:05,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:05,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271950, now seen corresponding path program 75 times [2019-12-27 15:08:05,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:05,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865618341] [2019-12-27 15:08:05,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865618341] [2019-12-27 15:08:05,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77419446] [2019-12-27 15:08:05,694 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:05,738 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:05,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:05,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:05,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:05,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:05,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:05,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [24020464] [2019-12-27 15:08:05,836 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:05,837 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:05,839 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:05,839 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:05,839 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:05,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:05,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:05,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:05,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:05,840 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:05,955 INFO L93 Difference]: Finished difference Result 177 states and 409 transitions. [2019-12-27 15:08:05,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:05,955 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:05,957 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:08:05,957 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:08:05,957 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:08:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2019-12-27 15:08:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 328 transitions. [2019-12-27 15:08:05,960 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 328 transitions. Word has length 13 [2019-12-27 15:08:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:05,961 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 328 transitions. [2019-12-27 15:08:05,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 328 transitions. [2019-12-27 15:08:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:05,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:05,961 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:06,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,162 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:06,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 76 times [2019-12-27 15:08:06,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:06,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900743471] [2019-12-27 15:08:06,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:06,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900743471] [2019-12-27 15:08:06,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679219743] [2019-12-27 15:08:06,240 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:06,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:06,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:06,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:06,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:06,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:06,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1449247108] [2019-12-27 15:08:06,371 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:06,373 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:06,375 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:06,375 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:06,375 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:06,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:06,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:06,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:06,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:06,376 INFO L87 Difference]: Start difference. First operand 138 states and 328 transitions. Second operand 9 states. [2019-12-27 15:08:06,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:06,497 INFO L93 Difference]: Finished difference Result 183 states and 418 transitions. [2019-12-27 15:08:06,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:06,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:06,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:06,499 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:08:06,499 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:08:06,500 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:08:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2019-12-27 15:08:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:06,503 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:06,504 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:06,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:06,504 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:06,505 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:06,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,708 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 77 times [2019-12-27 15:08:06,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:06,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456659007] [2019-12-27 15:08:06,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:06,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456659007] [2019-12-27 15:08:06,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111395224] [2019-12-27 15:08:06,779 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:06,822 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:06,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:06,823 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:06,824 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:06,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:06,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:06,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [143417018] [2019-12-27 15:08:06,911 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:06,912 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:06,913 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:06,913 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:06,913 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:06,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:06,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:06,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:06,914 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:07,047 INFO L93 Difference]: Finished difference Result 185 states and 428 transitions. [2019-12-27 15:08:07,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:07,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:07,049 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:07,050 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:07,050 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:07,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 140. [2019-12-27 15:08:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-27 15:08:07,052 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-27 15:08:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:07,052 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-27 15:08:07,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-27 15:08:07,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:07,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:07,053 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:07,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,253 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 78 times [2019-12-27 15:08:07,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:07,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360023952] [2019-12-27 15:08:07,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360023952] [2019-12-27 15:08:07,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804024597] [2019-12-27 15:08:07,331 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,377 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:07,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:07,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:07,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:07,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:07,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [311892822] [2019-12-27 15:08:07,491 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:07,492 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:07,494 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:07,494 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:07,495 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:07,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:07,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:07,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:07,495 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 9 states. [2019-12-27 15:08:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:07,626 INFO L93 Difference]: Finished difference Result 184 states and 424 transitions. [2019-12-27 15:08:07,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:07,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:07,628 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:07,628 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:07,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 141. [2019-12-27 15:08:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:07,631 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:07,632 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:07,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:07,632 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:07,632 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:07,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,833 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 79 times [2019-12-27 15:08:07,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:07,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627552609] [2019-12-27 15:08:07,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:07,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627552609] [2019-12-27 15:08:07,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65996658] [2019-12-27 15:08:07,905 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:07,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:07,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:08,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:08,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:08,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1867088844] [2019-12-27 15:08:08,037 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:08,038 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:08,039 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:08,039 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:08,039 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:08,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:08,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:08,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:08,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:08,040 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:08,175 INFO L93 Difference]: Finished difference Result 182 states and 422 transitions. [2019-12-27 15:08:08,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:08,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:08,178 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:08,178 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:08,178 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:08,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:08,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 139. [2019-12-27 15:08:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2019-12-27 15:08:08,183 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 13 [2019-12-27 15:08:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:08,183 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2019-12-27 15:08:08,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2019-12-27 15:08:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:08,184 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:08,184 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:08,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:08,387 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:08,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:08,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 80 times [2019-12-27 15:08:08,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:08,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686440528] [2019-12-27 15:08:08,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:08,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686440528] [2019-12-27 15:08:08,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570029457] [2019-12-27 15:08:08,456 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:08,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:08,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:08,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:08,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:08,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:08,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:08,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1784888988] [2019-12-27 15:08:08,581 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:08,583 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:08,584 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:08,584 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:08,585 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:08,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:08,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:08,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:08,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:08,585 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand 9 states. [2019-12-27 15:08:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:08,731 INFO L93 Difference]: Finished difference Result 187 states and 430 transitions. [2019-12-27 15:08:08,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:08,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:08,733 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:08:08,733 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 15:08:08,734 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 15:08:08,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 141. [2019-12-27 15:08:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:08,737 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:08,737 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:08,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:08,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:08,738 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:08,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:08,939 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:08,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884750, now seen corresponding path program 81 times [2019-12-27 15:08:08,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:08,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658921016] [2019-12-27 15:08:08,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:09,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658921016] [2019-12-27 15:08:09,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703705103] [2019-12-27 15:08:09,011 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:09,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:09,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:09,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:09,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:09,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:09,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:09,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1708397666] [2019-12-27 15:08:09,507 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:09,509 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:09,510 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:09,510 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:09,510 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:09,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:09,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:09,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=160, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:09,511 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:09,678 INFO L93 Difference]: Finished difference Result 185 states and 428 transitions. [2019-12-27 15:08:09,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:09,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:09,680 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:09,680 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:09,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=246, Unknown=1, NotChecked=0, Total=380 [2019-12-27 15:08:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 140. [2019-12-27 15:08:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 336 transitions. [2019-12-27 15:08:09,684 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 336 transitions. Word has length 13 [2019-12-27 15:08:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:09,684 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 336 transitions. [2019-12-27 15:08:09,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 336 transitions. [2019-12-27 15:08:09,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:09,685 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:09,685 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:09,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:09,888 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1575889400, now seen corresponding path program 82 times [2019-12-27 15:08:09,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:09,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691732698] [2019-12-27 15:08:09,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:09,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691732698] [2019-12-27 15:08:09,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886581238] [2019-12-27 15:08:09,958 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:10,001 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:10,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:10,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:10,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:10,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:10,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:10,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1272245386] [2019-12-27 15:08:10,089 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:10,090 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:10,092 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:10,092 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:10,092 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:10,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:10,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:10,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:10,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:10,093 INFO L87 Difference]: Start difference. First operand 140 states and 336 transitions. Second operand 9 states. [2019-12-27 15:08:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:10,245 INFO L93 Difference]: Finished difference Result 178 states and 410 transitions. [2019-12-27 15:08:10,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:10,245 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:10,247 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:08:10,247 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:08:10,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:08:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 141. [2019-12-27 15:08:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 340 transitions. [2019-12-27 15:08:10,251 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 340 transitions. Word has length 13 [2019-12-27 15:08:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:10,252 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 340 transitions. [2019-12-27 15:08:10,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 340 transitions. [2019-12-27 15:08:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:10,252 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:10,252 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:10,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:10,455 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1575889555, now seen corresponding path program 83 times [2019-12-27 15:08:10,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:10,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041776276] [2019-12-27 15:08:10,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:10,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041776276] [2019-12-27 15:08:10,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385738971] [2019-12-27 15:08:10,529 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:10,572 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:10,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:10,574 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:10,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:10,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:10,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:10,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [471019046] [2019-12-27 15:08:10,672 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:10,673 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:10,674 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:08:10,674 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:10,674 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:10,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:10,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:10,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:10,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:10,675 INFO L87 Difference]: Start difference. First operand 141 states and 340 transitions. Second operand 9 states. [2019-12-27 15:08:10,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:10,796 INFO L93 Difference]: Finished difference Result 163 states and 376 transitions. [2019-12-27 15:08:10,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:10,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:10,798 INFO L225 Difference]: With dead ends: 163 [2019-12-27 15:08:10,798 INFO L226 Difference]: Without dead ends: 157 [2019-12-27 15:08:10,799 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-27 15:08:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2019-12-27 15:08:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:10,802 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:10,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:10,802 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:10,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:10,804 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:10,804 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:11,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:11,007 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 84 times [2019-12-27 15:08:11,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:11,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488351368] [2019-12-27 15:08:11,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:11,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488351368] [2019-12-27 15:08:11,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825889951] [2019-12-27 15:08:11,070 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:11,115 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:11,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:11,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:08:11,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:11,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:11,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:11,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [32507421] [2019-12-27 15:08:11,214 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:11,215 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:11,218 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 49 transitions. [2019-12-27 15:08:11,218 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:11,221 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:08:11,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:11,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:11,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:11,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:11,222 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:11,383 INFO L93 Difference]: Finished difference Result 168 states and 378 transitions. [2019-12-27 15:08:11,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:11,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:11,385 INFO L225 Difference]: With dead ends: 168 [2019-12-27 15:08:11,386 INFO L226 Difference]: Without dead ends: 167 [2019-12-27 15:08:11,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:11,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-12-27 15:08:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 138. [2019-12-27 15:08:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:11,390 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:11,390 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:11,390 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:11,390 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:11,391 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:11,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:11,594 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash -573265077, now seen corresponding path program 85 times [2019-12-27 15:08:11,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:11,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067787415] [2019-12-27 15:08:11,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:11,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067787415] [2019-12-27 15:08:11,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040299799] [2019-12-27 15:08:11,671 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:11,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:11,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:11,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:11,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:11,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2082764452] [2019-12-27 15:08:11,807 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:11,809 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:11,811 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:08:11,811 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:11,813 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:08:11,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:11,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:11,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:11,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:11,814 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:12,018 INFO L93 Difference]: Finished difference Result 176 states and 395 transitions. [2019-12-27 15:08:12,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:12,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:12,020 INFO L225 Difference]: With dead ends: 176 [2019-12-27 15:08:12,020 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 15:08:12,020 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 15:08:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2019-12-27 15:08:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-27 15:08:12,024 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-27 15:08:12,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:12,024 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-27 15:08:12,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-27 15:08:12,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:12,025 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:12,025 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:12,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,225 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:12,226 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 86 times [2019-12-27 15:08:12,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:12,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059044943] [2019-12-27 15:08:12,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:12,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059044943] [2019-12-27 15:08:12,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390308934] [2019-12-27 15:08:12,322 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:12,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:12,364 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:12,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:12,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:12,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:12,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [153650910] [2019-12-27 15:08:12,452 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:12,453 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:12,455 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 43 transitions. [2019-12-27 15:08:12,458 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:12,461 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:08:12,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:12,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:12,462 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 9 states. [2019-12-27 15:08:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:12,617 INFO L93 Difference]: Finished difference Result 174 states and 392 transitions. [2019-12-27 15:08:12,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:12,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:12,619 INFO L225 Difference]: With dead ends: 174 [2019-12-27 15:08:12,619 INFO L226 Difference]: Without dead ends: 173 [2019-12-27 15:08:12,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-27 15:08:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 138. [2019-12-27 15:08:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:12,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:12,623 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:12,623 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:12,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:12,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:12,624 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:12,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,827 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:12,828 INFO L82 PathProgramCache]: Analyzing trace with hash -573409227, now seen corresponding path program 87 times [2019-12-27 15:08:12,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:12,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103341964] [2019-12-27 15:08:12,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:12,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103341964] [2019-12-27 15:08:12,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519069478] [2019-12-27 15:08:12,917 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:12,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:12,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:12,982 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:12,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:13,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:13,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:13,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [678783666] [2019-12-27 15:08:13,170 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:13,171 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:13,173 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:13,174 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:13,176 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:13,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:13,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:13,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:13,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2019-12-27 15:08:13,177 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:13,433 INFO L93 Difference]: Finished difference Result 183 states and 411 transitions. [2019-12-27 15:08:13,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:13,433 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:13,435 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:08:13,436 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:08:13,436 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=285, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:08:13,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-12-27 15:08:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:13,441 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:13,442 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:13,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:13,442 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:13,443 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:13,443 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:13,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:13,648 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:13,649 INFO L82 PathProgramCache]: Analyzing trace with hash -573409382, now seen corresponding path program 88 times [2019-12-27 15:08:13,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:13,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156570068] [2019-12-27 15:08:13,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:13,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156570068] [2019-12-27 15:08:13,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267791922] [2019-12-27 15:08:13,734 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:13,778 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:13,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:13,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:13,780 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:14,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:14,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:14,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [227972523] [2019-12-27 15:08:14,564 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:14,565 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:14,567 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:14,567 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:14,569 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:14,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:14,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:14,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:14,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:14,569 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:14,805 INFO L93 Difference]: Finished difference Result 182 states and 412 transitions. [2019-12-27 15:08:14,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:14,805 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:14,807 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:14,807 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:14,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 139. [2019-12-27 15:08:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-27 15:08:14,812 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-27 15:08:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:14,812 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-27 15:08:14,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-27 15:08:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:14,813 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:14,813 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:15,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:15,016 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash -573414032, now seen corresponding path program 89 times [2019-12-27 15:08:15,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:15,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336878930] [2019-12-27 15:08:15,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:15,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336878930] [2019-12-27 15:08:15,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806754991] [2019-12-27 15:08:15,095 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:15,136 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:15,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:15,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:15,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:15,649 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:08:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:15,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:15,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:15,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [941702813] [2019-12-27 15:08:15,650 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:15,651 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:15,654 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:15,654 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:15,656 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:15,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:15,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:15,657 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 9 states. [2019-12-27 15:08:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:15,845 INFO L93 Difference]: Finished difference Result 186 states and 421 transitions. [2019-12-27 15:08:15,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:15,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:15,847 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:08:15,847 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 15:08:15,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 15:08:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2019-12-27 15:08:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:15,852 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:15,852 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:15,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:15,852 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:15,853 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:16,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:16,055 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 90 times [2019-12-27 15:08:16,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:16,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334329191] [2019-12-27 15:08:16,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:16,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334329191] [2019-12-27 15:08:16,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322405508] [2019-12-27 15:08:16,154 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:16,195 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:16,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:16,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:16,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:16,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:16,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:16,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1444936567] [2019-12-27 15:08:16,297 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:16,300 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:16,302 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 37 transitions. [2019-12-27 15:08:16,302 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:16,303 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:08:16,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:16,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:16,304 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:16,459 INFO L93 Difference]: Finished difference Result 177 states and 400 transitions. [2019-12-27 15:08:16,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:16,459 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:16,460 INFO L225 Difference]: With dead ends: 177 [2019-12-27 15:08:16,460 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 15:08:16,461 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:16,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 15:08:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2019-12-27 15:08:16,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:16,464 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:16,465 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:16,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:16,465 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:16,465 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:16,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:16,669 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash -577877877, now seen corresponding path program 91 times [2019-12-27 15:08:16,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:16,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158981599] [2019-12-27 15:08:16,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:16,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158981599] [2019-12-27 15:08:16,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064468092] [2019-12-27 15:08:16,744 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:16,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:16,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:16,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:16,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:16,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1018552054] [2019-12-27 15:08:16,918 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:16,919 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:16,920 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:16,921 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:16,922 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:16,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:16,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:16,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:16,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:16,923 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:17,124 INFO L93 Difference]: Finished difference Result 182 states and 407 transitions. [2019-12-27 15:08:17,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:17,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:17,125 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:17,125 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:17,125 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2019-12-27 15:08:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:17,127 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:17,127 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:17,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:17,128 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:17,128 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:17,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:17,328 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:17,329 INFO L82 PathProgramCache]: Analyzing trace with hash -577878032, now seen corresponding path program 92 times [2019-12-27 15:08:17,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:17,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846736040] [2019-12-27 15:08:17,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:17,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846736040] [2019-12-27 15:08:17,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678905707] [2019-12-27 15:08:17,410 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:17,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:17,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:17,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:17,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:19,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:19,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:19,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [577007547] [2019-12-27 15:08:19,618 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:19,619 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:19,621 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:19,621 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:19,623 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:19,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:19,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:19,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:19,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:19,624 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:19,938 INFO L93 Difference]: Finished difference Result 184 states and 417 transitions. [2019-12-27 15:08:19,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:19,938 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:19,939 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:19,939 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:19,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2019-12-27 15:08:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:19,942 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:19,943 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:19,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:19,944 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:19,944 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:20,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:20,145 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash -577882682, now seen corresponding path program 93 times [2019-12-27 15:08:20,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:20,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500937391] [2019-12-27 15:08:20,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:20,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500937391] [2019-12-27 15:08:20,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062001948] [2019-12-27 15:08:20,224 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:20,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:20,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:20,263 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:20,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:20,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:20,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:20,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [342133859] [2019-12-27 15:08:20,386 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:20,387 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:20,389 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:20,389 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:20,390 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:20,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:20,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:20,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:20,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:20,391 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:20,629 INFO L93 Difference]: Finished difference Result 182 states and 409 transitions. [2019-12-27 15:08:20,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:20,629 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:20,630 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:20,630 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:20,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:20,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2019-12-27 15:08:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:20,633 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:20,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:20,634 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:20,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:20,634 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:20,634 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:20,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:20,835 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash -577882837, now seen corresponding path program 94 times [2019-12-27 15:08:20,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:20,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912111545] [2019-12-27 15:08:20,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:20,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912111545] [2019-12-27 15:08:20,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459411654] [2019-12-27 15:08:20,908 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:20,949 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:20,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:20,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:20,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:21,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:21,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:21,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1677887388] [2019-12-27 15:08:21,094 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:21,095 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:21,097 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:21,097 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:21,099 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:21,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:21,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:21,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:21,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:21,099 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:21,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:21,325 INFO L93 Difference]: Finished difference Result 180 states and 408 transitions. [2019-12-27 15:08:21,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:21,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:21,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:21,326 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:08:21,326 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:08:21,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:08:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2019-12-27 15:08:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-27 15:08:21,331 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-27 15:08:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:21,331 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-27 15:08:21,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-27 15:08:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:21,332 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:21,332 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:21,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:21,535 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash -578026832, now seen corresponding path program 95 times [2019-12-27 15:08:21,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:21,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346871518] [2019-12-27 15:08:21,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:21,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346871518] [2019-12-27 15:08:21,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791634901] [2019-12-27 15:08:21,630 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:21,672 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:21,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:21,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:21,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:21,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:21,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:21,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [6699633] [2019-12-27 15:08:21,778 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:21,779 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:21,780 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:21,780 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:21,782 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:21,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:21,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:21,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:21,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:21,783 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 9 states. [2019-12-27 15:08:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:21,982 INFO L93 Difference]: Finished difference Result 185 states and 415 transitions. [2019-12-27 15:08:21,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:21,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:21,984 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:21,984 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:21,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2019-12-27 15:08:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:21,987 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:21,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:21,987 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:21,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:21,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:21,988 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:21,988 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:22,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:22,190 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash -578026987, now seen corresponding path program 96 times [2019-12-27 15:08:22,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:22,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265819758] [2019-12-27 15:08:22,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:22,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265819758] [2019-12-27 15:08:22,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148981606] [2019-12-27 15:08:22,262 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:22,303 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:22,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:22,303 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:22,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:22,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:22,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:22,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [680418354] [2019-12-27 15:08:22,427 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:22,428 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:22,429 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:22,429 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:22,430 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:22,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:22,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:22,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:22,431 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:22,726 INFO L93 Difference]: Finished difference Result 184 states and 415 transitions. [2019-12-27 15:08:22,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:08:22,727 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:22,728 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:22,728 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:22,728 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:08:22,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2019-12-27 15:08:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:22,732 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:22,733 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:22,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:22,733 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:22,734 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:22,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:22,934 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:22,935 INFO L82 PathProgramCache]: Analyzing trace with hash -578031637, now seen corresponding path program 97 times [2019-12-27 15:08:22,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:22,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146770119] [2019-12-27 15:08:22,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:23,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146770119] [2019-12-27 15:08:23,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338549278] [2019-12-27 15:08:23,012 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:23,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:23,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:23,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:23,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:23,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760141402] [2019-12-27 15:08:23,156 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:23,157 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:23,160 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:23,160 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:23,161 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:23,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:23,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:23,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:23,162 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:23,353 INFO L93 Difference]: Finished difference Result 180 states and 406 transitions. [2019-12-27 15:08:23,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:23,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:23,354 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:08:23,354 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:08:23,354 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:08:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2019-12-27 15:08:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:23,358 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:23,358 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:23,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:23,358 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:23,358 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:23,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,559 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash -578031792, now seen corresponding path program 98 times [2019-12-27 15:08:23,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:23,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33750139] [2019-12-27 15:08:23,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:23,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33750139] [2019-12-27 15:08:23,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564648930] [2019-12-27 15:08:23,647 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:23,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:23,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:23,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:23,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:23,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:23,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:23,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1372570667] [2019-12-27 15:08:23,796 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:23,798 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:23,800 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 31 transitions. [2019-12-27 15:08:23,800 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:23,801 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:08:23,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:23,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:23,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:23,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:23,802 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:23,991 INFO L93 Difference]: Finished difference Result 170 states and 384 transitions. [2019-12-27 15:08:23,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:23,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:23,993 INFO L225 Difference]: With dead ends: 170 [2019-12-27 15:08:23,993 INFO L226 Difference]: Without dead ends: 169 [2019-12-27 15:08:23,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-27 15:08:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2019-12-27 15:08:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 327 transitions. [2019-12-27 15:08:23,997 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 327 transitions. Word has length 13 [2019-12-27 15:08:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:23,998 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 327 transitions. [2019-12-27 15:08:23,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 327 transitions. [2019-12-27 15:08:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:23,999 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:23,999 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:24,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,203 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:24,204 INFO L82 PathProgramCache]: Analyzing trace with hash -716406027, now seen corresponding path program 99 times [2019-12-27 15:08:24,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:24,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588789530] [2019-12-27 15:08:24,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:24,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588789530] [2019-12-27 15:08:24,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555826698] [2019-12-27 15:08:24,284 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:24,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:24,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:24,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:24,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:24,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:24,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [357293891] [2019-12-27 15:08:24,406 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:24,407 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:24,408 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:24,408 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:24,409 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:24,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:24,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:24,410 INFO L87 Difference]: Start difference. First operand 138 states and 327 transitions. Second operand 9 states. [2019-12-27 15:08:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:24,580 INFO L93 Difference]: Finished difference Result 179 states and 404 transitions. [2019-12-27 15:08:24,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:24,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:24,581 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:08:24,581 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:08:24,581 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:08:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2019-12-27 15:08:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:24,584 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:24,584 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:24,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:24,585 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:24,585 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:24,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,788 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash -716406182, now seen corresponding path program 100 times [2019-12-27 15:08:24,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:24,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673964952] [2019-12-27 15:08:24,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:24,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673964952] [2019-12-27 15:08:24,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522647884] [2019-12-27 15:08:24,869 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:24,911 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:24,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:24,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:24,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:24,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:24,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:24,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [377025157] [2019-12-27 15:08:24,994 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:24,995 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:24,997 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:24,997 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:24,998 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:24,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:24,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:24,999 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:25,184 INFO L93 Difference]: Finished difference Result 187 states and 429 transitions. [2019-12-27 15:08:25,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:25,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:25,185 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:08:25,186 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 15:08:25,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 15:08:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 141. [2019-12-27 15:08:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:25,189 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:25,190 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:25,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:25,190 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:25,190 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:25,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,393 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:25,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:25,394 INFO L82 PathProgramCache]: Analyzing trace with hash -716410832, now seen corresponding path program 101 times [2019-12-27 15:08:25,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:25,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704326418] [2019-12-27 15:08:25,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:25,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704326418] [2019-12-27 15:08:25,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405668931] [2019-12-27 15:08:25,473 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:25,513 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:25,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:25,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:25,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:25,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:25,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:25,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [663846338] [2019-12-27 15:08:25,600 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:25,601 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:25,603 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:25,603 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:25,604 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:25,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:25,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:25,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:25,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:25,604 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:26,124 INFO L93 Difference]: Finished difference Result 184 states and 418 transitions. [2019-12-27 15:08:26,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:26,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:26,126 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:26,126 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:26,126 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2019-12-27 15:08:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:26,129 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:26,129 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:26,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:26,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:26,129 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:26,129 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:26,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,330 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:26,331 INFO L82 PathProgramCache]: Analyzing trace with hash -716410987, now seen corresponding path program 102 times [2019-12-27 15:08:26,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:26,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730790763] [2019-12-27 15:08:26,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:26,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730790763] [2019-12-27 15:08:26,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929018460] [2019-12-27 15:08:26,400 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:08:26,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:26,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:26,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:26,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:26,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:26,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1386466561] [2019-12-27 15:08:26,527 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:26,528 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:26,530 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:26,530 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:26,530 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:26,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:26,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:26,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:26,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:26,531 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:26,692 INFO L93 Difference]: Finished difference Result 189 states and 435 transitions. [2019-12-27 15:08:26,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:26,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:26,693 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:08:26,693 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:08:26,693 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:08:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 140. [2019-12-27 15:08:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:26,697 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:26,697 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:26,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:26,698 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:26,698 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:26,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:26,901 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 103 times [2019-12-27 15:08:26,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:26,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234845364] [2019-12-27 15:08:26,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:26,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234845364] [2019-12-27 15:08:26,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751695931] [2019-12-27 15:08:26,970 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:27,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:27,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:27,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:27,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:27,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [294755060] [2019-12-27 15:08:27,097 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:27,098 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:27,099 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:27,099 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:27,100 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:27,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:27,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:27,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:27,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:27,101 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:27,259 INFO L93 Difference]: Finished difference Result 184 states and 417 transitions. [2019-12-27 15:08:27,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:27,259 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:27,260 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:27,260 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:27,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2019-12-27 15:08:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:27,263 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:27,264 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:27,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:27,264 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:27,264 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:27,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,465 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:27,466 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 104 times [2019-12-27 15:08:27,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:27,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099322054] [2019-12-27 15:08:27,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:27,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099322054] [2019-12-27 15:08:27,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809080853] [2019-12-27 15:08:27,546 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:27,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:27,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:27,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:27,586 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:27,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:27,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:27,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [608064417] [2019-12-27 15:08:27,698 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:27,699 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:27,701 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:27,702 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:27,702 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:27,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:27,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:27,704 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:27,876 INFO L93 Difference]: Finished difference Result 186 states and 426 transitions. [2019-12-27 15:08:27,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:27,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:27,877 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:08:27,877 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 15:08:27,878 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 15:08:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 141. [2019-12-27 15:08:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:27,882 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:27,882 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:27,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:27,883 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:27,883 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:28,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:28,083 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 105 times [2019-12-27 15:08:28,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:28,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757878600] [2019-12-27 15:08:28,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:28,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757878600] [2019-12-27 15:08:28,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797258712] [2019-12-27 15:08:28,165 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:28,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:28,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:28,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:28,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:28,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:28,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:28,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [341654456] [2019-12-27 15:08:28,304 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:28,305 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:28,306 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:28,306 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:28,307 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:28,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:28,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:28,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:28,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:28,308 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:28,489 INFO L93 Difference]: Finished difference Result 183 states and 417 transitions. [2019-12-27 15:08:28,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:28,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:28,491 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:08:28,491 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:08:28,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:08:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 142. [2019-12-27 15:08:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:28,495 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:28,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:28,495 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:28,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:28,496 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:28,496 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:28,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:28,700 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:28,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:28,700 INFO L82 PathProgramCache]: Analyzing trace with hash -716559942, now seen corresponding path program 106 times [2019-12-27 15:08:28,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:28,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381486687] [2019-12-27 15:08:28,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:28,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381486687] [2019-12-27 15:08:28,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512201617] [2019-12-27 15:08:28,771 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:28,811 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:28,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:28,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:28,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:28,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:28,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:28,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [915615516] [2019-12-27 15:08:28,906 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:28,907 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:28,909 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:28,910 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:28,910 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:28,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:28,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:28,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:28,911 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:29,063 INFO L93 Difference]: Finished difference Result 180 states and 414 transitions. [2019-12-27 15:08:29,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:29,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:29,065 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:08:29,065 INFO L226 Difference]: Without dead ends: 179 [2019-12-27 15:08:29,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-12-27 15:08:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2019-12-27 15:08:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:08:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 331 transitions. [2019-12-27 15:08:29,069 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 331 transitions. Word has length 13 [2019-12-27 15:08:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:29,069 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 331 transitions. [2019-12-27 15:08:29,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 331 transitions. [2019-12-27 15:08:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:29,070 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:29,070 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:29,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,273 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash -721023632, now seen corresponding path program 107 times [2019-12-27 15:08:29,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:29,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171957917] [2019-12-27 15:08:29,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:29,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171957917] [2019-12-27 15:08:29,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93214486] [2019-12-27 15:08:29,342 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:29,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:29,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:29,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:29,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:29,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:29,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1927056649] [2019-12-27 15:08:29,483 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:29,484 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:29,486 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:29,486 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:29,486 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:29,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:29,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:29,487 INFO L87 Difference]: Start difference. First operand 139 states and 331 transitions. Second operand 9 states. [2019-12-27 15:08:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:29,640 INFO L93 Difference]: Finished difference Result 187 states and 423 transitions. [2019-12-27 15:08:29,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:29,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:29,641 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:08:29,641 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 15:08:29,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 15:08:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 142. [2019-12-27 15:08:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:29,645 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:29,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:29,645 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:29,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:29,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:29,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:29,646 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:29,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,849 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:29,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash -721023787, now seen corresponding path program 108 times [2019-12-27 15:08:29,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:29,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974514055] [2019-12-27 15:08:29,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:29,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974514055] [2019-12-27 15:08:29,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467993901] [2019-12-27 15:08:29,922 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:29,963 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:29,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:29,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:29,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:30,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:30,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:30,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [979352880] [2019-12-27 15:08:30,488 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:30,488 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:30,490 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:30,491 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:30,491 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:30,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:30,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:30,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:30,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:30,492 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:30,690 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2019-12-27 15:08:30,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:30,691 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:30,692 INFO L225 Difference]: With dead ends: 190 [2019-12-27 15:08:30,692 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:08:30,692 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:08:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 141. [2019-12-27 15:08:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:30,695 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:30,695 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:30,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:30,695 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:30,696 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:30,696 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:30,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:30,896 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash -721028437, now seen corresponding path program 109 times [2019-12-27 15:08:30,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:30,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102513606] [2019-12-27 15:08:30,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:30,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102513606] [2019-12-27 15:08:30,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882892305] [2019-12-27 15:08:30,970 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:31,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:31,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:31,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:31,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:31,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1720656106] [2019-12-27 15:08:31,140 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:31,141 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:31,143 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:31,143 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:31,143 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:31,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:31,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:31,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:31,144 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:31,698 INFO L93 Difference]: Finished difference Result 185 states and 422 transitions. [2019-12-27 15:08:31,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:31,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:31,699 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:31,699 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:31,699 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=285, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2019-12-27 15:08:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:31,703 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:31,703 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:31,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:31,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:31,704 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:31,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:31,904 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash -721028592, now seen corresponding path program 110 times [2019-12-27 15:08:31,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:31,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482117053] [2019-12-27 15:08:31,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:31,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482117053] [2019-12-27 15:08:31,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659854164] [2019-12-27 15:08:31,980 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:32,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:32,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:32,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:32,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:32,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:32,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1636960633] [2019-12-27 15:08:32,173 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:32,174 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:32,176 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:32,176 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:32,177 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:32,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:32,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:32,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:32,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:32,177 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:32,390 INFO L93 Difference]: Finished difference Result 184 states and 421 transitions. [2019-12-27 15:08:32,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:32,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:32,392 INFO L225 Difference]: With dead ends: 184 [2019-12-27 15:08:32,392 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:08:32,392 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:08:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2019-12-27 15:08:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 335 transitions. [2019-12-27 15:08:32,396 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 335 transitions. Word has length 13 [2019-12-27 15:08:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:32,396 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 335 transitions. [2019-12-27 15:08:32,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 335 transitions. [2019-12-27 15:08:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:32,396 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:32,396 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:32,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,597 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -721172587, now seen corresponding path program 111 times [2019-12-27 15:08:32,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:32,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165072285] [2019-12-27 15:08:32,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:32,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165072285] [2019-12-27 15:08:32,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899318367] [2019-12-27 15:08:32,667 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:32,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:32,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:32,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:32,709 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:32,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:32,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:32,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [42631758] [2019-12-27 15:08:32,805 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:32,806 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:32,807 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:32,807 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:32,808 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:32,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:32,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:32,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:32,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:32,809 INFO L87 Difference]: Start difference. First operand 140 states and 335 transitions. Second operand 9 states. [2019-12-27 15:08:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:32,982 INFO L93 Difference]: Finished difference Result 185 states and 420 transitions. [2019-12-27 15:08:32,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:32,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:32,984 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:08:32,984 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:32,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2019-12-27 15:08:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:32,987 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:32,987 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:32,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:32,987 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:32,987 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:33,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,188 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:33,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash -721172742, now seen corresponding path program 112 times [2019-12-27 15:08:33,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:33,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990237648] [2019-12-27 15:08:33,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:33,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990237648] [2019-12-27 15:08:33,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008543875] [2019-12-27 15:08:33,253 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:33,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:33,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:33,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:33,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:33,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:33,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:33,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [574833186] [2019-12-27 15:08:33,410 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:33,411 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:33,413 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:33,413 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:33,414 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:33,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:33,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:33,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:33,415 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:34,055 INFO L93 Difference]: Finished difference Result 182 states and 416 transitions. [2019-12-27 15:08:34,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:34,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:34,056 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:08:34,057 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:08:34,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=283, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:08:34,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2019-12-27 15:08:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:08:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2019-12-27 15:08:34,061 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 13 [2019-12-27 15:08:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:34,061 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2019-12-27 15:08:34,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2019-12-27 15:08:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:34,061 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:34,061 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:34,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:34,265 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash -721177392, now seen corresponding path program 113 times [2019-12-27 15:08:34,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:34,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210151756] [2019-12-27 15:08:34,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:34,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210151756] [2019-12-27 15:08:34,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098806594] [2019-12-27 15:08:34,330 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:34,374 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:34,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:34,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:34,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:34,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:34,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:34,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1280107369] [2019-12-27 15:08:34,469 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:34,470 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:34,472 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:34,472 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:34,473 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:34,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:34,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:34,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:34,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:34,473 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand 9 states. [2019-12-27 15:08:34,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:34,651 INFO L93 Difference]: Finished difference Result 173 states and 394 transitions. [2019-12-27 15:08:34,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:34,651 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:34,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:34,652 INFO L225 Difference]: With dead ends: 173 [2019-12-27 15:08:34,652 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:08:34,652 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:08:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2019-12-27 15:08:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 15:08:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2019-12-27 15:08:34,656 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 13 [2019-12-27 15:08:34,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:34,656 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2019-12-27 15:08:34,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2019-12-27 15:08:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:34,656 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:34,656 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:34,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:34,857 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:34,858 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 114 times [2019-12-27 15:08:34,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:34,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866485216] [2019-12-27 15:08:34,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:34,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866485216] [2019-12-27 15:08:34,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284883452] [2019-12-27 15:08:34,923 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:34,967 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:34,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:34,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:08:34,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:35,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:35,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 15:08:35,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1554047115] [2019-12-27 15:08:35,056 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:35,057 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:35,059 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:08:35,059 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:35,060 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:08:35,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:08:35,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:35,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:08:35,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:35,060 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand 9 states. [2019-12-27 15:08:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:35,205 INFO L93 Difference]: Finished difference Result 158 states and 361 transitions. [2019-12-27 15:08:35,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:08:35,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:08:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:35,206 INFO L225 Difference]: With dead ends: 158 [2019-12-27 15:08:35,206 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 15:08:35,207 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 15:08:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2019-12-27 15:08:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 15:08:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 323 transitions. [2019-12-27 15:08:35,210 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 323 transitions. Word has length 13 [2019-12-27 15:08:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:35,210 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 323 transitions. [2019-12-27 15:08:35,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:08:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 323 transitions. [2019-12-27 15:08:35,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:08:35,211 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:35,211 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:35,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:35,413 INFO L410 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:35,414 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-27 15:08:35,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:35,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313672495] [2019-12-27 15:08:35,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:35,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313672495] [2019-12-27 15:08:35,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575651112] [2019-12-27 15:08:35,502 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:35,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:08:35,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:35,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:08:35,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2019-12-27 15:08:35,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [462520379] [2019-12-27 15:08:35,626 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:35,627 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:35,630 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 45 transitions. [2019-12-27 15:08:35,630 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:35,632 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 14 times. [2019-12-27 15:08:35,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:08:35,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:08:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:35,635 INFO L87 Difference]: Start difference. First operand 138 states and 323 transitions. Second operand 8 states. [2019-12-27 15:08:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:35,653 INFO L93 Difference]: Finished difference Result 151 states and 325 transitions. [2019-12-27 15:08:35,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:08:35,653 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-12-27 15:08:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:35,654 INFO L225 Difference]: With dead ends: 151 [2019-12-27 15:08:35,655 INFO L226 Difference]: Without dead ends: 137 [2019-12-27 15:08:35,655 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:08:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-27 15:08:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-12-27 15:08:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 15:08:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-27 15:08:35,658 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-27 15:08:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:35,659 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-27 15:08:35,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:08:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-27 15:08:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:35,659 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:35,659 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:35,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:35,863 INFO L410 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 115 times [2019-12-27 15:08:35,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:35,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648811219] [2019-12-27 15:08:35,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:35,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648811219] [2019-12-27 15:08:35,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407923110] [2019-12-27 15:08:35,935 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:35,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:35,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:36,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:36,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:36,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [764819403] [2019-12-27 15:08:36,097 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:36,098 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:36,100 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 30 transitions. [2019-12-27 15:08:36,100 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:36,100 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:36,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:36,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:36,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:36,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:36,101 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 10 states. [2019-12-27 15:08:36,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:36,146 INFO L93 Difference]: Finished difference Result 161 states and 344 transitions. [2019-12-27 15:08:36,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:36,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:36,147 INFO L225 Difference]: With dead ends: 161 [2019-12-27 15:08:36,148 INFO L226 Difference]: Without dead ends: 159 [2019-12-27 15:08:36,148 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:08:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-27 15:08:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2019-12-27 15:08:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 15:08:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-27 15:08:36,151 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-27 15:08:36,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:36,152 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-27 15:08:36,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:36,152 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-27 15:08:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:36,152 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:36,152 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:36,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,353 INFO L410 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:36,353 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 116 times [2019-12-27 15:08:36,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:36,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21566280] [2019-12-27 15:08:36,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:36,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21566280] [2019-12-27 15:08:36,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470850840] [2019-12-27 15:08:36,430 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:36,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:36,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:36,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:36,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:36,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:36,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [548898154] [2019-12-27 15:08:36,578 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:36,579 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:36,581 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:36,581 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:36,582 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:36,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:36,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:36,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:36,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:36,582 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 10 states. [2019-12-27 15:08:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:36,663 INFO L93 Difference]: Finished difference Result 169 states and 363 transitions. [2019-12-27 15:08:36,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:36,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:36,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:36,664 INFO L225 Difference]: With dead ends: 169 [2019-12-27 15:08:36,664 INFO L226 Difference]: Without dead ends: 168 [2019-12-27 15:08:36,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-12-27 15:08:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2019-12-27 15:08:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-27 15:08:36,667 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-27 15:08:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:36,668 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-27 15:08:36,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:36,668 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-27 15:08:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:36,668 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:36,668 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:36,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,869 INFO L410 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:36,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:36,869 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 117 times [2019-12-27 15:08:36,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:36,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98568650] [2019-12-27 15:08:36,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:36,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98568650] [2019-12-27 15:08:36,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989246502] [2019-12-27 15:08:36,953 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:36,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:36,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:37,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:37,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:37,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:37,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1403134229] [2019-12-27 15:08:37,129 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:37,138 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:37,140 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:37,140 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:37,140 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:37,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:37,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:37,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:37,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:37,141 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 10 states. [2019-12-27 15:08:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:37,226 INFO L93 Difference]: Finished difference Result 180 states and 385 transitions. [2019-12-27 15:08:37,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:37,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:37,228 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:08:37,228 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:08:37,228 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:08:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:08:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-27 15:08:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-27 15:08:37,232 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-27 15:08:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:37,232 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-27 15:08:37,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-27 15:08:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:37,233 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:37,233 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:37,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,436 INFO L410 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 118 times [2019-12-27 15:08:37,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:37,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599520404] [2019-12-27 15:08:37,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:37,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599520404] [2019-12-27 15:08:37,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367878849] [2019-12-27 15:08:37,511 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:37,555 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:37,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:37,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:37,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:38,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:38,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:38,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [311701410] [2019-12-27 15:08:38,650 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:38,651 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:38,653 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 28 transitions. [2019-12-27 15:08:38,653 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:38,654 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:38,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:38,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=202, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:08:38,654 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 10 states. [2019-12-27 15:08:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:39,222 INFO L93 Difference]: Finished difference Result 171 states and 367 transitions. [2019-12-27 15:08:39,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:39,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:39,224 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:08:39,224 INFO L226 Difference]: Without dead ends: 169 [2019-12-27 15:08:39,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=135, Invalid=242, Unknown=3, NotChecked=0, Total=380 [2019-12-27 15:08:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-12-27 15:08:39,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2019-12-27 15:08:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:08:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-27 15:08:39,228 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-27 15:08:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:39,228 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-27 15:08:39,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-27 15:08:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:39,229 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:39,229 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:39,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,429 INFO L410 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 119 times [2019-12-27 15:08:39,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:39,431 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304412908] [2019-12-27 15:08:39,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:39,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304412908] [2019-12-27 15:08:39,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785624232] [2019-12-27 15:08:39,506 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,550 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:39,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:39,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:39,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:39,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:39,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:39,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [364353938] [2019-12-27 15:08:39,649 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:39,650 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:39,652 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:39,652 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:39,652 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:39,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:39,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:39,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:39,653 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 10 states. [2019-12-27 15:08:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:39,752 INFO L93 Difference]: Finished difference Result 172 states and 373 transitions. [2019-12-27 15:08:39,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:39,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:39,753 INFO L225 Difference]: With dead ends: 172 [2019-12-27 15:08:39,754 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 15:08:39,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:39,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 15:08:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2019-12-27 15:08:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:08:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-27 15:08:39,758 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-27 15:08:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:39,758 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-27 15:08:39,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-27 15:08:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:39,758 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:39,758 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:39,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:39,959 INFO L410 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 120 times [2019-12-27 15:08:39,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:39,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568890549] [2019-12-27 15:08:39,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:40,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568890549] [2019-12-27 15:08:40,046 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831673344] [2019-12-27 15:08:40,046 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:40,086 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:40,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:40,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:40,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:41,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:41,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:41,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1387474450] [2019-12-27 15:08:41,049 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:41,049 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:41,051 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:41,051 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:41,051 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:41,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:41,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:41,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:41,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:41,052 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 10 states. [2019-12-27 15:08:41,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:41,159 INFO L93 Difference]: Finished difference Result 194 states and 420 transitions. [2019-12-27 15:08:41,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:41,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:41,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:41,160 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:08:41,160 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:08:41,160 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:41,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:08:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2019-12-27 15:08:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:08:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 326 transitions. [2019-12-27 15:08:41,163 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 326 transitions. Word has length 14 [2019-12-27 15:08:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:41,163 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 326 transitions. [2019-12-27 15:08:41,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 326 transitions. [2019-12-27 15:08:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:41,164 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:41,164 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:41,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:41,367 INFO L410 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 121 times [2019-12-27 15:08:41,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:41,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847664207] [2019-12-27 15:08:41,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:41,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847664207] [2019-12-27 15:08:41,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596176904] [2019-12-27 15:08:41,488 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:41,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:41,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:43,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:43,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:43,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [205131240] [2019-12-27 15:08:43,229 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:43,230 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:43,231 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:43,232 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:43,232 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:43,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:43,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:43,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:43,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=206, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:08:43,232 INFO L87 Difference]: Start difference. First operand 144 states and 326 transitions. Second operand 10 states. [2019-12-27 15:08:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:44,270 INFO L93 Difference]: Finished difference Result 197 states and 427 transitions. [2019-12-27 15:08:44,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:44,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:44,271 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:08:44,271 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:08:44,271 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=147, Invalid=270, Unknown=3, NotChecked=0, Total=420 [2019-12-27 15:08:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:08:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 145. [2019-12-27 15:08:44,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:08:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-27 15:08:44,275 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 14 [2019-12-27 15:08:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:44,275 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-27 15:08:44,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-27 15:08:44,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:44,275 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:44,275 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:44,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:44,476 INFO L410 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:44,477 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 122 times [2019-12-27 15:08:44,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:44,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990291890] [2019-12-27 15:08:44,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:44,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990291890] [2019-12-27 15:08:44,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232639835] [2019-12-27 15:08:44,563 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:44,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:44,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:44,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:44,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:46,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:46,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:46,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [462201579] [2019-12-27 15:08:46,156 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:46,157 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:46,159 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:46,159 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:46,159 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:46,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:46,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:46,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:46,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:46,160 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 10 states. [2019-12-27 15:08:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:46,885 INFO L93 Difference]: Finished difference Result 192 states and 416 transitions. [2019-12-27 15:08:46,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:46,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:46,886 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:46,886 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:08:46,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=152, Invalid=267, Unknown=1, NotChecked=0, Total=420 [2019-12-27 15:08:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:08:46,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2019-12-27 15:08:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:08:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-27 15:08:46,890 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-27 15:08:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:46,890 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-27 15:08:46,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-27 15:08:46,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:46,890 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:46,890 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:47,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:47,091 INFO L410 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:47,092 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 123 times [2019-12-27 15:08:47,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:47,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319545118] [2019-12-27 15:08:47,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:47,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319545118] [2019-12-27 15:08:47,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249883620] [2019-12-27 15:08:47,185 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:47,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:08:47,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:47,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 15:08:47,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:47,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:47,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-27 15:08:47,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1879043288] [2019-12-27 15:08:47,284 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:47,285 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:47,287 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:47,287 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:47,287 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:47,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:47,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:47,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:47,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:08:47,288 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 10 states. [2019-12-27 15:08:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:47,394 INFO L93 Difference]: Finished difference Result 186 states and 403 transitions. [2019-12-27 15:08:47,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:47,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:47,396 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:08:47,396 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 15:08:47,397 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:08:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 15:08:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 146. [2019-12-27 15:08:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 15:08:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 332 transitions. [2019-12-27 15:08:47,400 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 332 transitions. Word has length 14 [2019-12-27 15:08:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:47,400 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 332 transitions. [2019-12-27 15:08:47,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 332 transitions. [2019-12-27 15:08:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:47,400 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:47,401 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:47,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:47,604 INFO L410 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:47,604 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 124 times [2019-12-27 15:08:47,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:47,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761201426] [2019-12-27 15:08:47,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:47,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761201426] [2019-12-27 15:08:47,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799247588] [2019-12-27 15:08:47,685 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:47,725 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:47,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:47,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:47,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:48,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:48,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:48,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [434457521] [2019-12-27 15:08:48,598 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:48,599 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:48,601 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:48,601 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:48,601 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:48,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:48,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:48,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:48,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:48,601 INFO L87 Difference]: Start difference. First operand 146 states and 332 transitions. Second operand 10 states. [2019-12-27 15:08:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:48,831 INFO L93 Difference]: Finished difference Result 187 states and 407 transitions. [2019-12-27 15:08:48,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:48,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:48,833 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:08:48,833 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:08:48,833 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:08:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:08:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2019-12-27 15:08:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:08:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 328 transitions. [2019-12-27 15:08:48,838 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 328 transitions. Word has length 14 [2019-12-27 15:08:48,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:48,838 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 328 transitions. [2019-12-27 15:08:48,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 328 transitions. [2019-12-27 15:08:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:48,839 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:48,839 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:49,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:49,042 INFO L410 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 125 times [2019-12-27 15:08:49,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:49,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121312383] [2019-12-27 15:08:49,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:49,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121312383] [2019-12-27 15:08:49,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544861900] [2019-12-27 15:08:49,127 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:49,175 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:08:49,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:49,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:49,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:49,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:49,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:49,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1287789254] [2019-12-27 15:08:49,898 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:49,898 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:49,900 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:08:49,901 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:49,901 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:49,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:49,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:49,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:49,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=201, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:08:49,901 INFO L87 Difference]: Start difference. First operand 145 states and 328 transitions. Second operand 10 states. [2019-12-27 15:08:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:52,049 INFO L93 Difference]: Finished difference Result 179 states and 390 transitions. [2019-12-27 15:08:52,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:52,049 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:52,050 INFO L225 Difference]: With dead ends: 179 [2019-12-27 15:08:52,050 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 15:08:52,050 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=152, Invalid=266, Unknown=2, NotChecked=0, Total=420 [2019-12-27 15:08:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 15:08:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 144. [2019-12-27 15:08:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 15:08:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 325 transitions. [2019-12-27 15:08:52,054 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 325 transitions. Word has length 14 [2019-12-27 15:08:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:52,054 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 325 transitions. [2019-12-27 15:08:52,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 325 transitions. [2019-12-27 15:08:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:52,054 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:52,054 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:52,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:52,255 INFO L410 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:52,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091347, now seen corresponding path program 126 times [2019-12-27 15:08:52,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:52,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086570626] [2019-12-27 15:08:52,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:52,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086570626] [2019-12-27 15:08:52,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327040436] [2019-12-27 15:08:52,330 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:52,379 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:08:52,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:52,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:52,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:52,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:52,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:52,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [337111203] [2019-12-27 15:08:52,484 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:52,486 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:52,488 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:52,488 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:52,488 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:52,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:52,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:52,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:52,489 INFO L87 Difference]: Start difference. First operand 144 states and 325 transitions. Second operand 10 states. [2019-12-27 15:08:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:52,613 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2019-12-27 15:08:52,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:52,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:52,615 INFO L225 Difference]: With dead ends: 170 [2019-12-27 15:08:52,615 INFO L226 Difference]: Without dead ends: 162 [2019-12-27 15:08:52,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:52,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-27 15:08:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2019-12-27 15:08:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:08:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 15:08:52,618 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 15:08:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:52,618 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 15:08:52,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 15:08:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:52,619 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:52,619 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:52,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:52,820 INFO L410 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:52,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1837091192, now seen corresponding path program 127 times [2019-12-27 15:08:52,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:52,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146841216] [2019-12-27 15:08:52,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:52,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146841216] [2019-12-27 15:08:52,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862789801] [2019-12-27 15:08:52,907 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:52,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:52,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:53,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:53,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:53,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [939861820] [2019-12-27 15:08:53,073 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:53,074 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:53,076 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:53,076 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:53,076 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:53,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:53,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:53,077 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 10 states. [2019-12-27 15:08:53,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:53,228 INFO L93 Difference]: Finished difference Result 192 states and 419 transitions. [2019-12-27 15:08:53,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:53,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:53,229 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:08:53,229 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:08:53,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:08:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2019-12-27 15:08:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:08:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 15:08:53,233 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 15:08:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:53,233 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 15:08:53,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 15:08:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:53,234 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:53,234 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:53,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:53,435 INFO L410 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:53,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:53,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 128 times [2019-12-27 15:08:53,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:53,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136267102] [2019-12-27 15:08:53,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:53,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136267102] [2019-12-27 15:08:53,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408353953] [2019-12-27 15:08:53,512 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:53,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:53,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:53,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:53,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:53,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:53,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:53,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1124771810] [2019-12-27 15:08:53,674 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:53,675 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:53,677 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:53,677 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:53,677 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:53,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:53,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:53,678 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 10 states. [2019-12-27 15:08:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:53,887 INFO L93 Difference]: Finished difference Result 207 states and 451 transitions. [2019-12-27 15:08:53,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:53,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:53,889 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:08:53,889 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 15:08:53,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 15:08:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 150. [2019-12-27 15:08:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 340 transitions. [2019-12-27 15:08:53,893 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 340 transitions. Word has length 14 [2019-12-27 15:08:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:53,893 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 340 transitions. [2019-12-27 15:08:53,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 340 transitions. [2019-12-27 15:08:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:53,894 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:53,894 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:54,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:54,094 INFO L410 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 129 times [2019-12-27 15:08:54,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:54,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992411258] [2019-12-27 15:08:54,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:54,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992411258] [2019-12-27 15:08:54,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905290784] [2019-12-27 15:08:54,174 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:54,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:08:54,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:54,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:54,215 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:54,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:54,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:54,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1654558020] [2019-12-27 15:08:54,357 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:54,358 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:54,360 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:54,360 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:54,360 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:54,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:54,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:54,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:54,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:54,361 INFO L87 Difference]: Start difference. First operand 150 states and 340 transitions. Second operand 10 states. [2019-12-27 15:08:54,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:54,522 INFO L93 Difference]: Finished difference Result 204 states and 445 transitions. [2019-12-27 15:08:54,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:54,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:54,524 INFO L225 Difference]: With dead ends: 204 [2019-12-27 15:08:54,524 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 15:08:54,524 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 15:08:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 149. [2019-12-27 15:08:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:08:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 15:08:54,527 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 15:08:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:54,527 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 15:08:54,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 15:08:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:54,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:54,528 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:54,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:54,728 INFO L410 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:54,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 130 times [2019-12-27 15:08:54,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:54,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468539915] [2019-12-27 15:08:54,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:54,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468539915] [2019-12-27 15:08:54,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432791694] [2019-12-27 15:08:54,811 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:54,849 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:08:54,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:54,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:54,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:54,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:54,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:54,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [239892272] [2019-12-27 15:08:54,985 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:54,986 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:54,988 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:54,988 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:54,988 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:54,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:54,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:54,989 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 10 states. [2019-12-27 15:08:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:55,159 INFO L93 Difference]: Finished difference Result 206 states and 451 transitions. [2019-12-27 15:08:55,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:55,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:55,160 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:08:55,160 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:08:55,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:08:55,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2019-12-27 15:08:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 344 transitions. [2019-12-27 15:08:55,165 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 344 transitions. Word has length 14 [2019-12-27 15:08:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:55,165 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 344 transitions. [2019-12-27 15:08:55,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 344 transitions. [2019-12-27 15:08:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:55,165 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:55,166 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:55,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:55,369 INFO L410 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 131 times [2019-12-27 15:08:55,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:55,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145922551] [2019-12-27 15:08:55,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:55,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145922551] [2019-12-27 15:08:55,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404328091] [2019-12-27 15:08:55,447 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:55,488 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:08:55,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:55,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:55,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:55,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:55,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:55,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [759047002] [2019-12-27 15:08:55,640 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:55,641 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:55,643 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:55,643 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:55,643 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:55,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:55,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:55,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:55,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:55,644 INFO L87 Difference]: Start difference. First operand 151 states and 344 transitions. Second operand 10 states. [2019-12-27 15:08:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:55,825 INFO L93 Difference]: Finished difference Result 206 states and 451 transitions. [2019-12-27 15:08:55,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:55,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:55,827 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:08:55,827 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:08:55,827 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:08:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2019-12-27 15:08:55,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:08:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 340 transitions. [2019-12-27 15:08:55,831 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 340 transitions. Word has length 14 [2019-12-27 15:08:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:55,831 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 340 transitions. [2019-12-27 15:08:55,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 340 transitions. [2019-12-27 15:08:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:55,832 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:55,832 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:56,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:56,035 INFO L410 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 132 times [2019-12-27 15:08:56,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:56,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580512586] [2019-12-27 15:08:56,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:56,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580512586] [2019-12-27 15:08:56,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039951269] [2019-12-27 15:08:56,117 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:56,158 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:08:56,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:56,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:56,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:56,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:56,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:56,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1309230071] [2019-12-27 15:08:56,356 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:56,357 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:56,360 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:56,360 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:56,360 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:56,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:56,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:56,361 INFO L87 Difference]: Start difference. First operand 150 states and 340 transitions. Second operand 10 states. [2019-12-27 15:08:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:58,557 INFO L93 Difference]: Finished difference Result 207 states and 453 transitions. [2019-12-27 15:08:58,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:58,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:58,559 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:08:58,559 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 15:08:58,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=160, Invalid=301, Unknown=1, NotChecked=0, Total=462 [2019-12-27 15:08:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 15:08:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2019-12-27 15:08:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:08:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 344 transitions. [2019-12-27 15:08:58,562 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 344 transitions. Word has length 14 [2019-12-27 15:08:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:58,563 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 344 transitions. [2019-12-27 15:08:58,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 344 transitions. [2019-12-27 15:08:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:58,563 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:58,563 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:58,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,764 INFO L410 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:58,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937432, now seen corresponding path program 133 times [2019-12-27 15:08:58,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:58,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072364736] [2019-12-27 15:08:58,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:58,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072364736] [2019-12-27 15:08:58,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080771853] [2019-12-27 15:08:58,840 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:58,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:58,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:59,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:59,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:59,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [354591824] [2019-12-27 15:08:59,061 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:59,063 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:59,065 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:59,065 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:59,065 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:59,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:59,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:59,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:59,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:59,066 INFO L87 Difference]: Start difference. First operand 151 states and 344 transitions. Second operand 10 states. [2019-12-27 15:08:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:59,215 INFO L93 Difference]: Finished difference Result 194 states and 423 transitions. [2019-12-27 15:08:59,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:59,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:59,216 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:08:59,216 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:08:59,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:08:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 149. [2019-12-27 15:08:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:08:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2019-12-27 15:08:59,220 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 14 [2019-12-27 15:08:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:59,220 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2019-12-27 15:08:59,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2019-12-27 15:08:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:59,221 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:59,221 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:08:59,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:59,422 INFO L410 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:08:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:08:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 134 times [2019-12-27 15:08:59,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:08:59,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777438097] [2019-12-27 15:08:59,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:08:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:08:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:59,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777438097] [2019-12-27 15:08:59,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695461644] [2019-12-27 15:08:59,499 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:08:59,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:08:59,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:08:59,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:08:59,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:08:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:08:59,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:08:59,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:08:59,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1043850561] [2019-12-27 15:08:59,683 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:08:59,684 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:08:59,687 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:08:59,687 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:08:59,687 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:08:59,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:08:59,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:08:59,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:08:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:08:59,688 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand 10 states. [2019-12-27 15:08:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:08:59,841 INFO L93 Difference]: Finished difference Result 194 states and 422 transitions. [2019-12-27 15:08:59,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:08:59,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:08:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:08:59,842 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:08:59,842 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:08:59,842 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:08:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:08:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 152. [2019-12-27 15:08:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:08:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 346 transitions. [2019-12-27 15:08:59,845 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 346 transitions. Word has length 14 [2019-12-27 15:08:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:08:59,845 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 346 transitions. [2019-12-27 15:08:59,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:08:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 346 transitions. [2019-12-27 15:08:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:08:59,845 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:08:59,845 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:00,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:00,046 INFO L410 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:00,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 135 times [2019-12-27 15:09:00,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:00,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433501818] [2019-12-27 15:09:00,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:00,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433501818] [2019-12-27 15:09:00,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148521092] [2019-12-27 15:09:00,127 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:00,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:00,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:00,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:00,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:10,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:10,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:10,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1345069337] [2019-12-27 15:09:10,410 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:10,411 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:10,413 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:10,413 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:10,414 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:10,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:10,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:10,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:10,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=206, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:10,414 INFO L87 Difference]: Start difference. First operand 152 states and 346 transitions. Second operand 10 states. [2019-12-27 15:09:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:12,738 INFO L93 Difference]: Finished difference Result 204 states and 449 transitions. [2019-12-27 15:09:12,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:12,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:12,739 INFO L225 Difference]: With dead ends: 204 [2019-12-27 15:09:12,739 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 15:09:12,739 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=161, Invalid=299, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:09:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 15:09:12,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 151. [2019-12-27 15:09:12,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:09:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 342 transitions. [2019-12-27 15:09:12,742 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 342 transitions. Word has length 14 [2019-12-27 15:09:12,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:12,743 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 342 transitions. [2019-12-27 15:09:12,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:12,743 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 342 transitions. [2019-12-27 15:09:12,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:12,743 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:12,743 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:12,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:12,944 INFO L410 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 136 times [2019-12-27 15:09:12,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:12,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402880378] [2019-12-27 15:09:12,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:13,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402880378] [2019-12-27 15:09:13,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636781221] [2019-12-27 15:09:13,027 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:13,071 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:13,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:13,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:13,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:13,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:13,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:13,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2108472102] [2019-12-27 15:09:13,235 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:13,236 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:13,238 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:13,238 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:13,239 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:13,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:13,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:13,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:13,239 INFO L87 Difference]: Start difference. First operand 151 states and 342 transitions. Second operand 10 states. [2019-12-27 15:09:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:13,416 INFO L93 Difference]: Finished difference Result 196 states and 427 transitions. [2019-12-27 15:09:13,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:13,417 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:13,418 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:09:13,418 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:09:13,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:13,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:09:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 152. [2019-12-27 15:09:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:09:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 346 transitions. [2019-12-27 15:09:13,421 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 346 transitions. Word has length 14 [2019-12-27 15:09:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:13,421 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 346 transitions. [2019-12-27 15:09:13,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 346 transitions. [2019-12-27 15:09:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:13,422 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:13,422 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:13,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:13,623 INFO L410 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 137 times [2019-12-27 15:09:13,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:13,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768845496] [2019-12-27 15:09:13,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:13,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768845496] [2019-12-27 15:09:13,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482251915] [2019-12-27 15:09:13,703 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:13,744 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:13,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:13,745 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:13,746 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:13,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:13,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:13,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1339893171] [2019-12-27 15:09:13,926 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:13,927 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:13,929 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:13,929 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:13,929 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:13,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:13,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:13,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:13,930 INFO L87 Difference]: Start difference. First operand 152 states and 346 transitions. Second operand 10 states. [2019-12-27 15:09:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:14,106 INFO L93 Difference]: Finished difference Result 196 states and 430 transitions. [2019-12-27 15:09:14,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:14,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:14,108 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:09:14,108 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:09:14,108 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:09:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2019-12-27 15:09:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:09:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 338 transitions. [2019-12-27 15:09:14,112 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 338 transitions. Word has length 14 [2019-12-27 15:09:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:14,112 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 338 transitions. [2019-12-27 15:09:14,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 338 transitions. [2019-12-27 15:09:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:14,113 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:14,113 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:14,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:14,316 INFO L410 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 138 times [2019-12-27 15:09:14,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:14,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121373332] [2019-12-27 15:09:14,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:14,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121373332] [2019-12-27 15:09:14,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517547374] [2019-12-27 15:09:14,445 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:14,517 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:14,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:14,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:14,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:16,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:16,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:16,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1252484374] [2019-12-27 15:09:16,825 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:16,826 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:16,828 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:16,828 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:16,828 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:16,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:16,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:16,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:16,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=208, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:16,829 INFO L87 Difference]: Start difference. First operand 150 states and 338 transitions. Second operand 10 states. [2019-12-27 15:09:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:19,016 INFO L93 Difference]: Finished difference Result 195 states and 426 transitions. [2019-12-27 15:09:19,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:19,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:19,017 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:09:19,018 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 15:09:19,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=159, Invalid=301, Unknown=2, NotChecked=0, Total=462 [2019-12-27 15:09:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 15:09:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 152. [2019-12-27 15:09:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:09:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 345 transitions. [2019-12-27 15:09:19,021 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 345 transitions. Word has length 14 [2019-12-27 15:09:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:19,022 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 345 transitions. [2019-12-27 15:09:19,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 345 transitions. [2019-12-27 15:09:19,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:19,022 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:19,022 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:19,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:19,223 INFO L410 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324632, now seen corresponding path program 139 times [2019-12-27 15:09:19,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:19,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212085392] [2019-12-27 15:09:19,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:19,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212085392] [2019-12-27 15:09:19,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262663582] [2019-12-27 15:09:19,301 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:19,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:19,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:20,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:20,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:20,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [419040641] [2019-12-27 15:09:20,744 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:20,745 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:20,747 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:20,747 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:20,747 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:20,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:20,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:20,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:20,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:20,747 INFO L87 Difference]: Start difference. First operand 152 states and 345 transitions. Second operand 10 states. [2019-12-27 15:09:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:20,998 INFO L93 Difference]: Finished difference Result 192 states and 422 transitions. [2019-12-27 15:09:20,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:20,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:21,000 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:09:21,000 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:09:21,000 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:09:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 151. [2019-12-27 15:09:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:09:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 341 transitions. [2019-12-27 15:09:21,003 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 341 transitions. Word has length 14 [2019-12-27 15:09:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:21,004 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 341 transitions. [2019-12-27 15:09:21,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 341 transitions. [2019-12-27 15:09:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:21,004 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:21,004 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:21,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:21,205 INFO L410 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:21,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:21,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1832319982, now seen corresponding path program 140 times [2019-12-27 15:09:21,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:21,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357416344] [2019-12-27 15:09:21,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:21,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357416344] [2019-12-27 15:09:21,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086192818] [2019-12-27 15:09:21,290 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:21,331 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:21,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:21,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:21,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:21,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:21,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:21,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [196620172] [2019-12-27 15:09:21,513 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:21,514 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:21,517 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 24 transitions. [2019-12-27 15:09:21,517 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:21,517 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:21,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:21,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:21,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:21,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:21,517 INFO L87 Difference]: Start difference. First operand 151 states and 341 transitions. Second operand 10 states. [2019-12-27 15:09:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:21,704 INFO L93 Difference]: Finished difference Result 183 states and 401 transitions. [2019-12-27 15:09:21,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:21,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:21,706 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:09:21,706 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:09:21,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:09:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:09:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 149. [2019-12-27 15:09:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:09:21,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2019-12-27 15:09:21,709 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 14 [2019-12-27 15:09:21,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:21,709 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2019-12-27 15:09:21,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2019-12-27 15:09:21,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:21,710 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:21,710 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:21,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:21,913 INFO L410 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 141 times [2019-12-27 15:09:21,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:21,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285418409] [2019-12-27 15:09:21,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:21,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285418409] [2019-12-27 15:09:21,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515661138] [2019-12-27 15:09:21,992 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:22,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:22,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:22,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:22,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:22,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:22,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:22,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1433621943] [2019-12-27 15:09:22,141 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:22,142 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:22,145 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:22,145 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:22,145 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:22,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:22,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:22,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:22,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:22,146 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand 10 states. [2019-12-27 15:09:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:22,366 INFO L93 Difference]: Finished difference Result 186 states and 407 transitions. [2019-12-27 15:09:22,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:22,366 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:22,367 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:09:22,367 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:09:22,368 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:09:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2019-12-27 15:09:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:09:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-27 15:09:22,371 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-27 15:09:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:22,371 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-27 15:09:22,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-27 15:09:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:22,372 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:22,372 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:22,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:22,573 INFO L410 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1460022991, now seen corresponding path program 142 times [2019-12-27 15:09:22,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:22,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987189839] [2019-12-27 15:09:22,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:22,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987189839] [2019-12-27 15:09:22,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895800978] [2019-12-27 15:09:22,654 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:22,698 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:22,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:22,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:22,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:22,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:22,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:22,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1386121939] [2019-12-27 15:09:22,837 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:22,838 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:22,840 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:22,841 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:22,841 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:22,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:22,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:22,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:22,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:22,842 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 10 states. [2019-12-27 15:09:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:23,319 INFO L93 Difference]: Finished difference Result 199 states and 435 transitions. [2019-12-27 15:09:23,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:23,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:23,320 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:09:23,320 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:09:23,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:09:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 155. [2019-12-27 15:09:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 15:09:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-27 15:09:23,326 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-27 15:09:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:23,326 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-27 15:09:23,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-27 15:09:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:23,327 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:23,327 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:23,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:23,528 INFO L410 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1460023146, now seen corresponding path program 143 times [2019-12-27 15:09:23,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:23,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964027435] [2019-12-27 15:09:23,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:23,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964027435] [2019-12-27 15:09:23,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636985856] [2019-12-27 15:09:23,666 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:23,726 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:23,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:23,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:23,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:23,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:23,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:23,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [912750908] [2019-12-27 15:09:23,838 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:23,839 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:23,841 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:23,841 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:23,841 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:23,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:23,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:23,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:23,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:23,841 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 10 states. [2019-12-27 15:09:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:24,016 INFO L93 Difference]: Finished difference Result 199 states and 438 transitions. [2019-12-27 15:09:24,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:24,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:24,017 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:09:24,017 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:09:24,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:09:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2019-12-27 15:09:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:09:24,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-27 15:09:24,021 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-27 15:09:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:24,021 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-27 15:09:24,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-27 15:09:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:24,022 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:24,022 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:24,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:24,223 INFO L410 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:24,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167141, now seen corresponding path program 144 times [2019-12-27 15:09:24,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:24,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254174821] [2019-12-27 15:09:24,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:24,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254174821] [2019-12-27 15:09:24,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368355733] [2019-12-27 15:09:24,304 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:24,347 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:24,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:24,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:24,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:24,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:24,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:24,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1513296570] [2019-12-27 15:09:24,929 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:24,930 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:24,932 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:24,932 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:24,933 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:24,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:24,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:24,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:24,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=215, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:24,934 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 10 states. [2019-12-27 15:09:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:25,711 INFO L93 Difference]: Finished difference Result 203 states and 442 transitions. [2019-12-27 15:09:25,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:25,711 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:25,712 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:09:25,712 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:09:25,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=165, Invalid=340, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:09:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:09:25,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 156. [2019-12-27 15:09:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-27 15:09:25,716 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-27 15:09:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:25,716 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-27 15:09:25,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-27 15:09:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:25,716 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:25,716 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:25,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:25,917 INFO L410 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:25,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1460167296, now seen corresponding path program 145 times [2019-12-27 15:09:25,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:25,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347315864] [2019-12-27 15:09:25,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:25,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347315864] [2019-12-27 15:09:25,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854806002] [2019-12-27 15:09:25,999 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:26,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:26,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:26,588 WARN L192 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-12-27 15:09:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:27,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:27,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:27,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1402995656] [2019-12-27 15:09:27,894 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:27,895 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:27,896 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:27,896 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:27,896 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:27,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:27,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:27,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:27,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:27,897 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 10 states. [2019-12-27 15:09:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:30,054 INFO L93 Difference]: Finished difference Result 206 states and 452 transitions. [2019-12-27 15:09:30,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:30,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:30,056 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:09:30,056 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:09:30,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=165, Invalid=337, Unknown=4, NotChecked=0, Total=506 [2019-12-27 15:09:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:09:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 155. [2019-12-27 15:09:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 15:09:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-27 15:09:30,065 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-27 15:09:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:30,065 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-27 15:09:30,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-27 15:09:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:30,065 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:30,065 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:30,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:30,266 INFO L410 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1460171946, now seen corresponding path program 146 times [2019-12-27 15:09:30,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:30,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799422807] [2019-12-27 15:09:30,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:30,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799422807] [2019-12-27 15:09:30,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001437354] [2019-12-27 15:09:30,351 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:30,396 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:30,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:30,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:30,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:30,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:30,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:30,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [895706222] [2019-12-27 15:09:30,521 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:30,522 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:30,524 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:30,524 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:30,524 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:30,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:30,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:30,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:30,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:30,525 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 10 states. [2019-12-27 15:09:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:31,093 INFO L93 Difference]: Finished difference Result 212 states and 466 transitions. [2019-12-27 15:09:31,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:31,094 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:31,094 INFO L225 Difference]: With dead ends: 212 [2019-12-27 15:09:31,094 INFO L226 Difference]: Without dead ends: 211 [2019-12-27 15:09:31,095 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-27 15:09:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2019-12-27 15:09:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2019-12-27 15:09:31,098 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 14 [2019-12-27 15:09:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:31,098 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2019-12-27 15:09:31,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2019-12-27 15:09:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:31,099 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:31,099 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:31,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:31,300 INFO L410 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 147 times [2019-12-27 15:09:31,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:31,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496737929] [2019-12-27 15:09:31,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:31,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496737929] [2019-12-27 15:09:31,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406293101] [2019-12-27 15:09:31,443 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:31,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:31,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:31,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:31,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:31,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:31,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:31,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1587254924] [2019-12-27 15:09:31,703 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:31,705 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:31,709 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:31,709 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:31,709 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:31,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:31,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:31,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:31,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:31,711 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand 10 states. [2019-12-27 15:09:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:31,954 INFO L93 Difference]: Finished difference Result 200 states and 439 transitions. [2019-12-27 15:09:31,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:31,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:31,956 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:09:31,956 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:09:31,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:09:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 154. [2019-12-27 15:09:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:09:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2019-12-27 15:09:31,961 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 14 [2019-12-27 15:09:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:31,961 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2019-12-27 15:09:31,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2019-12-27 15:09:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:31,962 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:31,962 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:32,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:32,167 INFO L410 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:32,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 148 times [2019-12-27 15:09:32,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:32,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46996370] [2019-12-27 15:09:32,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:32,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46996370] [2019-12-27 15:09:32,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330325450] [2019-12-27 15:09:32,254 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:32,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:32,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:32,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:32,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:32,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:32,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:32,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759620453] [2019-12-27 15:09:32,425 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:32,426 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:32,428 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:32,428 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:32,428 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:32,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:32,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:32,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:32,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:32,429 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand 10 states. [2019-12-27 15:09:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:33,429 INFO L93 Difference]: Finished difference Result 207 states and 453 transitions. [2019-12-27 15:09:33,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:33,429 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:33,430 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:09:33,430 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 15:09:33,430 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=163, Invalid=341, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 15:09:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 157. [2019-12-27 15:09:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 357 transitions. [2019-12-27 15:09:33,434 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 357 transitions. Word has length 14 [2019-12-27 15:09:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:33,434 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 357 transitions. [2019-12-27 15:09:33,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 357 transitions. [2019-12-27 15:09:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:33,434 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:33,435 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:33,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:33,635 INFO L410 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:33,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 149 times [2019-12-27 15:09:33,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:33,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53819205] [2019-12-27 15:09:33,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:33,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53819205] [2019-12-27 15:09:33,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667395821] [2019-12-27 15:09:33,719 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:33,759 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:33,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:33,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:33,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:37,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:37,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:37,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [406940217] [2019-12-27 15:09:37,933 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:37,934 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:37,938 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:37,938 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:37,938 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:37,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:37,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:37,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:37,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:37,939 INFO L87 Difference]: Start difference. First operand 157 states and 357 transitions. Second operand 10 states. [2019-12-27 15:09:38,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:38,504 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2019-12-27 15:09:38,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:38,505 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:38,505 INFO L225 Difference]: With dead ends: 212 [2019-12-27 15:09:38,505 INFO L226 Difference]: Without dead ends: 211 [2019-12-27 15:09:38,506 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-27 15:09:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2019-12-27 15:09:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 354 transitions. [2019-12-27 15:09:38,509 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 354 transitions. Word has length 14 [2019-12-27 15:09:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:38,509 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 354 transitions. [2019-12-27 15:09:38,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 354 transitions. [2019-12-27 15:09:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:38,510 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:38,510 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:38,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:38,711 INFO L410 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:38,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 150 times [2019-12-27 15:09:38,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:38,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520256712] [2019-12-27 15:09:38,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:38,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520256712] [2019-12-27 15:09:38,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363964331] [2019-12-27 15:09:38,798 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:38,841 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:38,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:38,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:38,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:39,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:39,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:39,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1371052136] [2019-12-27 15:09:39,104 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:39,105 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:39,107 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:39,107 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:39,107 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:39,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:39,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:39,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:39,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:39,108 INFO L87 Difference]: Start difference. First operand 156 states and 354 transitions. Second operand 10 states. [2019-12-27 15:09:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:39,883 INFO L93 Difference]: Finished difference Result 215 states and 473 transitions. [2019-12-27 15:09:39,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:39,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:39,885 INFO L225 Difference]: With dead ends: 215 [2019-12-27 15:09:39,885 INFO L226 Difference]: Without dead ends: 214 [2019-12-27 15:09:39,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=340, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:09:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-27 15:09:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 157. [2019-12-27 15:09:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 358 transitions. [2019-12-27 15:09:39,889 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 358 transitions. Word has length 14 [2019-12-27 15:09:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:39,889 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 358 transitions. [2019-12-27 15:09:39,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:39,889 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 358 transitions. [2019-12-27 15:09:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:39,889 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:39,889 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:40,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:40,093 INFO L410 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 151 times [2019-12-27 15:09:40,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:40,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403816570] [2019-12-27 15:09:40,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:40,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403816570] [2019-12-27 15:09:40,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685347323] [2019-12-27 15:09:40,217 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:40,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:40,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:40,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:40,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:40,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [754017118] [2019-12-27 15:09:40,425 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:40,426 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:40,429 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:40,429 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:40,429 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:40,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:40,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:40,430 INFO L87 Difference]: Start difference. First operand 157 states and 358 transitions. Second operand 10 states. [2019-12-27 15:09:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:41,740 INFO L93 Difference]: Finished difference Result 205 states and 451 transitions. [2019-12-27 15:09:41,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:41,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:41,741 INFO L225 Difference]: With dead ends: 205 [2019-12-27 15:09:41,741 INFO L226 Difference]: Without dead ends: 204 [2019-12-27 15:09:41,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=338, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-27 15:09:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 155. [2019-12-27 15:09:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 15:09:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 351 transitions. [2019-12-27 15:09:41,744 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 351 transitions. Word has length 14 [2019-12-27 15:09:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:41,744 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 351 transitions. [2019-12-27 15:09:41,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 351 transitions. [2019-12-27 15:09:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:41,744 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:41,744 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:41,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:41,945 INFO L410 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:41,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 152 times [2019-12-27 15:09:41,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:41,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874488663] [2019-12-27 15:09:41,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:42,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874488663] [2019-12-27 15:09:42,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257452023] [2019-12-27 15:09:42,026 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:42,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:42,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:42,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:42,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:42,575 WARN L192 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:09:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:42,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:42,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:42,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [843373426] [2019-12-27 15:09:42,594 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:42,595 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:42,597 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:42,597 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:42,597 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:42,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:42,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:42,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:42,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:42,598 INFO L87 Difference]: Start difference. First operand 155 states and 351 transitions. Second operand 10 states. [2019-12-27 15:09:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:43,229 INFO L93 Difference]: Finished difference Result 219 states and 484 transitions. [2019-12-27 15:09:43,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:43,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:43,230 INFO L225 Difference]: With dead ends: 219 [2019-12-27 15:09:43,230 INFO L226 Difference]: Without dead ends: 218 [2019-12-27 15:09:43,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=340, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:09:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-27 15:09:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 157. [2019-12-27 15:09:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 359 transitions. [2019-12-27 15:09:43,234 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 359 transitions. Word has length 14 [2019-12-27 15:09:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:43,234 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 359 transitions. [2019-12-27 15:09:43,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 359 transitions. [2019-12-27 15:09:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:43,235 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:43,235 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:43,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:43,436 INFO L410 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 153 times [2019-12-27 15:09:43,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:43,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764732524] [2019-12-27 15:09:43,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:43,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764732524] [2019-12-27 15:09:43,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72320091] [2019-12-27 15:09:43,519 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:43,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:43,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:43,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:43,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:44,071 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:09:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:44,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:44,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:44,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1784749057] [2019-12-27 15:09:44,118 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:44,119 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:44,121 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:44,121 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:44,121 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:44,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:44,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:44,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:44,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:44,122 INFO L87 Difference]: Start difference. First operand 157 states and 359 transitions. Second operand 10 states. [2019-12-27 15:09:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:44,364 INFO L93 Difference]: Finished difference Result 206 states and 451 transitions. [2019-12-27 15:09:44,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:44,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:44,365 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:09:44,365 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:09:44,366 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:09:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:09:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2019-12-27 15:09:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 355 transitions. [2019-12-27 15:09:44,369 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 355 transitions. Word has length 14 [2019-12-27 15:09:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:44,369 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 355 transitions. [2019-12-27 15:09:44,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 355 transitions. [2019-12-27 15:09:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:44,370 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:44,370 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:44,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:44,570 INFO L410 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:44,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1464789551, now seen corresponding path program 154 times [2019-12-27 15:09:44,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:44,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42191919] [2019-12-27 15:09:44,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:44,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42191919] [2019-12-27 15:09:44,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705577408] [2019-12-27 15:09:44,651 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:44,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:44,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:44,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:44,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:44,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:44,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:44,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1536850035] [2019-12-27 15:09:44,825 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:44,825 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:44,827 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:44,827 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:44,827 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:44,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:44,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:44,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:44,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:44,828 INFO L87 Difference]: Start difference. First operand 156 states and 355 transitions. Second operand 10 states. [2019-12-27 15:09:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:45,016 INFO L93 Difference]: Finished difference Result 211 states and 466 transitions. [2019-12-27 15:09:45,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:45,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:45,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:45,017 INFO L225 Difference]: With dead ends: 211 [2019-12-27 15:09:45,017 INFO L226 Difference]: Without dead ends: 210 [2019-12-27 15:09:45,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-12-27 15:09:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 157. [2019-12-27 15:09:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 359 transitions. [2019-12-27 15:09:45,020 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 359 transitions. Word has length 14 [2019-12-27 15:09:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:45,021 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 359 transitions. [2019-12-27 15:09:45,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 359 transitions. [2019-12-27 15:09:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:45,021 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:45,022 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:45,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:45,222 INFO L410 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1464789706, now seen corresponding path program 155 times [2019-12-27 15:09:45,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:45,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415973396] [2019-12-27 15:09:45,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:45,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415973396] [2019-12-27 15:09:45,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742336261] [2019-12-27 15:09:45,299 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:45,339 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:09:45,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:45,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:45,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:45,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:45,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:45,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [300352863] [2019-12-27 15:09:45,453 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:45,454 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:45,455 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:45,456 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:45,456 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:45,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:45,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:45,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:45,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:45,456 INFO L87 Difference]: Start difference. First operand 157 states and 359 transitions. Second operand 10 states. [2019-12-27 15:09:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:45,607 INFO L93 Difference]: Finished difference Result 190 states and 417 transitions. [2019-12-27 15:09:45,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:45,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:45,608 INFO L225 Difference]: With dead ends: 190 [2019-12-27 15:09:45,609 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:09:45,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:09:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2019-12-27 15:09:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:09:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 347 transitions. [2019-12-27 15:09:45,612 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 347 transitions. Word has length 14 [2019-12-27 15:09:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:45,613 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 347 transitions. [2019-12-27 15:09:45,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 347 transitions. [2019-12-27 15:09:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:45,613 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:45,613 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:45,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:45,814 INFO L410 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:45,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 156 times [2019-12-27 15:09:45,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:45,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019760246] [2019-12-27 15:09:45,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:45,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019760246] [2019-12-27 15:09:45,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862790288] [2019-12-27 15:09:45,905 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:45,952 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:45,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:45,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:45,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:46,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:46,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:46,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [943961803] [2019-12-27 15:09:46,063 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:46,063 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:46,065 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:46,066 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:46,066 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:46,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:46,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:46,067 INFO L87 Difference]: Start difference. First operand 154 states and 347 transitions. Second operand 10 states. [2019-12-27 15:09:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:46,216 INFO L93 Difference]: Finished difference Result 195 states and 423 transitions. [2019-12-27 15:09:46,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:46,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:46,217 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:09:46,217 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:09:46,217 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:09:46,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 158. [2019-12-27 15:09:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 358 transitions. [2019-12-27 15:09:46,220 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 358 transitions. Word has length 14 [2019-12-27 15:09:46,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:46,221 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 358 transitions. [2019-12-27 15:09:46,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:46,221 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 358 transitions. [2019-12-27 15:09:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:46,221 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:46,221 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:46,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:46,422 INFO L410 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:46,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 157 times [2019-12-27 15:09:46,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:46,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795310812] [2019-12-27 15:09:46,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:46,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795310812] [2019-12-27 15:09:46,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160408964] [2019-12-27 15:09:46,514 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:46,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:46,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:46,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:46,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:46,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1451785623] [2019-12-27 15:09:46,744 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:46,745 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:46,748 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:46,749 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:46,749 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:46,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:46,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:46,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:46,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:46,750 INFO L87 Difference]: Start difference. First operand 158 states and 358 transitions. Second operand 10 states. [2019-12-27 15:09:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:46,989 INFO L93 Difference]: Finished difference Result 212 states and 469 transitions. [2019-12-27 15:09:46,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:46,989 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:46,990 INFO L225 Difference]: With dead ends: 212 [2019-12-27 15:09:46,990 INFO L226 Difference]: Without dead ends: 211 [2019-12-27 15:09:46,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-27 15:09:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2019-12-27 15:09:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 355 transitions. [2019-12-27 15:09:46,994 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 355 transitions. Word has length 14 [2019-12-27 15:09:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:46,994 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 355 transitions. [2019-12-27 15:09:46,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 355 transitions. [2019-12-27 15:09:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:46,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:46,995 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:47,198 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:47,199 INFO L410 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:47,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:47,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168746, now seen corresponding path program 158 times [2019-12-27 15:09:47,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:47,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144123076] [2019-12-27 15:09:47,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:47,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144123076] [2019-12-27 15:09:47,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941673904] [2019-12-27 15:09:47,293 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:47,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:47,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:47,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:47,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:47,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:47,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:47,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [473553547] [2019-12-27 15:09:47,454 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:47,455 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:47,456 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:47,457 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:47,457 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:47,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:47,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:47,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:47,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:47,457 INFO L87 Difference]: Start difference. First operand 157 states and 355 transitions. Second operand 10 states. [2019-12-27 15:09:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:48,184 INFO L93 Difference]: Finished difference Result 204 states and 444 transitions. [2019-12-27 15:09:48,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:09:48,184 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:48,185 INFO L225 Difference]: With dead ends: 204 [2019-12-27 15:09:48,185 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 15:09:48,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=372, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:09:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 15:09:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 158. [2019-12-27 15:09:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2019-12-27 15:09:48,189 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 14 [2019-12-27 15:09:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:48,189 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2019-12-27 15:09:48,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2019-12-27 15:09:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:48,189 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:48,189 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:48,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:48,390 INFO L410 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:48,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 159 times [2019-12-27 15:09:48,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:48,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712536824] [2019-12-27 15:09:48,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:48,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712536824] [2019-12-27 15:09:48,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070284328] [2019-12-27 15:09:48,469 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:48,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:09:48,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:48,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:48,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:48,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:48,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:48,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2145760811] [2019-12-27 15:09:48,623 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:48,623 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:48,625 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:48,625 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:48,625 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:48,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:48,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:48,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:48,626 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand 10 states. [2019-12-27 15:09:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:48,805 INFO L93 Difference]: Finished difference Result 216 states and 479 transitions. [2019-12-27 15:09:48,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:48,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:48,806 INFO L225 Difference]: With dead ends: 216 [2019-12-27 15:09:48,806 INFO L226 Difference]: Without dead ends: 215 [2019-12-27 15:09:48,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-27 15:09:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 156. [2019-12-27 15:09:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 352 transitions. [2019-12-27 15:09:48,810 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 352 transitions. Word has length 14 [2019-12-27 15:09:48,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:48,810 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 352 transitions. [2019-12-27 15:09:48,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 352 transitions. [2019-12-27 15:09:48,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:48,811 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:48,811 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:49,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,012 INFO L410 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:49,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 160 times [2019-12-27 15:09:49,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:49,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821576200] [2019-12-27 15:09:49,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:49,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821576200] [2019-12-27 15:09:49,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024888558] [2019-12-27 15:09:49,102 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,146 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:49,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:49,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:49,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:49,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:49,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:49,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [325317106] [2019-12-27 15:09:49,234 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:49,235 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:49,237 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:49,237 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:49,237 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:49,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:49,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:49,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:49,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:49,237 INFO L87 Difference]: Start difference. First operand 156 states and 352 transitions. Second operand 10 states. [2019-12-27 15:09:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:49,416 INFO L93 Difference]: Finished difference Result 206 states and 448 transitions. [2019-12-27 15:09:49,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:49,417 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:49,417 INFO L225 Difference]: With dead ends: 206 [2019-12-27 15:09:49,417 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 15:09:49,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 15:09:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 158. [2019-12-27 15:09:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-27 15:09:49,421 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-27 15:09:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:49,422 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-27 15:09:49,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-27 15:09:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:49,422 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:49,423 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:49,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,625 INFO L410 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 161 times [2019-12-27 15:09:49,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:49,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581160698] [2019-12-27 15:09:49,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:49,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581160698] [2019-12-27 15:09:49,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160232359] [2019-12-27 15:09:49,712 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:49,757 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:49,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:49,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:49,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:49,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:49,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:49,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1383118910] [2019-12-27 15:09:49,859 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:49,860 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:49,862 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:49,862 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:49,862 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:49,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:49,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:49,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:49,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:49,863 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 10 states. [2019-12-27 15:09:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:50,047 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2019-12-27 15:09:50,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:50,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:50,053 INFO L225 Difference]: With dead ends: 212 [2019-12-27 15:09:50,053 INFO L226 Difference]: Without dead ends: 211 [2019-12-27 15:09:50,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-12-27 15:09:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2019-12-27 15:09:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 356 transitions. [2019-12-27 15:09:50,056 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 356 transitions. Word has length 14 [2019-12-27 15:09:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:50,057 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 356 transitions. [2019-12-27 15:09:50,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 356 transitions. [2019-12-27 15:09:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:50,057 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:50,057 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:50,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,260 INFO L410 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 162 times [2019-12-27 15:09:50,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:50,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841869568] [2019-12-27 15:09:50,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841869568] [2019-12-27 15:09:50,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564456646] [2019-12-27 15:09:50,338 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,379 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:50,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:50,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:50,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:50,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:50,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [628330565] [2019-12-27 15:09:50,476 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:50,477 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:50,480 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:50,480 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:50,480 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:50,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:50,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:50,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:50,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:50,481 INFO L87 Difference]: Start difference. First operand 157 states and 356 transitions. Second operand 10 states. [2019-12-27 15:09:50,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:50,672 INFO L93 Difference]: Finished difference Result 210 states and 460 transitions. [2019-12-27 15:09:50,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:50,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:50,673 INFO L225 Difference]: With dead ends: 210 [2019-12-27 15:09:50,673 INFO L226 Difference]: Without dead ends: 209 [2019-12-27 15:09:50,674 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:50,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-12-27 15:09:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 158. [2019-12-27 15:09:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-27 15:09:50,677 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-27 15:09:50,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:50,678 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-27 15:09:50,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:50,678 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-27 15:09:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:50,678 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:50,678 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:50,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:50,879 INFO L410 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317856, now seen corresponding path program 163 times [2019-12-27 15:09:50,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:50,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143034047] [2019-12-27 15:09:50,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:50,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143034047] [2019-12-27 15:09:50,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786256107] [2019-12-27 15:09:50,959 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:51,005 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:51,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:51,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:51,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:51,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1377359365] [2019-12-27 15:09:51,110 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:51,110 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:51,113 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:51,113 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:51,113 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:51,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:51,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:51,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:51,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:51,113 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 10 states. [2019-12-27 15:09:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:51,283 INFO L93 Difference]: Finished difference Result 200 states and 439 transitions. [2019-12-27 15:09:51,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:51,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:51,285 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:09:51,285 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:09:51,285 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:09:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 155. [2019-12-27 15:09:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 15:09:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 349 transitions. [2019-12-27 15:09:51,288 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 349 transitions. Word has length 14 [2019-12-27 15:09:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:51,288 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 349 transitions. [2019-12-27 15:09:51,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 349 transitions. [2019-12-27 15:09:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:51,289 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:51,289 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:51,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:51,489 INFO L410 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:51,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:51,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781546, now seen corresponding path program 164 times [2019-12-27 15:09:51,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:51,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102453957] [2019-12-27 15:09:51,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:51,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102453957] [2019-12-27 15:09:51,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042733607] [2019-12-27 15:09:51,573 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:51,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:09:51,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:51,614 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:51,614 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:51,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:51,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:51,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [638243327] [2019-12-27 15:09:51,719 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:51,720 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:51,722 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:51,722 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:51,722 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:51,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:51,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:51,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:51,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:51,723 INFO L87 Difference]: Start difference. First operand 155 states and 349 transitions. Second operand 10 states. [2019-12-27 15:09:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:51,895 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2019-12-27 15:09:51,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:51,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:51,896 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:09:51,896 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 15:09:51,896 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 15:09:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 158. [2019-12-27 15:09:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-27 15:09:51,900 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-27 15:09:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:51,900 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-27 15:09:51,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-27 15:09:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:51,900 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:51,900 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:52,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:52,101 INFO L410 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 165 times [2019-12-27 15:09:52,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:52,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431061830] [2019-12-27 15:09:52,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:52,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431061830] [2019-12-27 15:09:52,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202008019] [2019-12-27 15:09:52,194 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:52,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:09:52,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:52,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:52,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:54,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:54,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:54,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1196848341] [2019-12-27 15:09:54,044 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:54,044 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:54,046 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:54,046 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:54,046 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:54,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:54,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:54,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:54,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:54,047 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 10 states. [2019-12-27 15:09:54,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:54,739 INFO L93 Difference]: Finished difference Result 215 states and 475 transitions. [2019-12-27 15:09:54,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:54,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:54,740 INFO L225 Difference]: With dead ends: 215 [2019-12-27 15:09:54,740 INFO L226 Difference]: Without dead ends: 214 [2019-12-27 15:09:54,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=168, Invalid=337, Unknown=1, NotChecked=0, Total=506 [2019-12-27 15:09:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-27 15:09:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 157. [2019-12-27 15:09:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:09:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 356 transitions. [2019-12-27 15:09:54,744 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 356 transitions. Word has length 14 [2019-12-27 15:09:54,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:54,744 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 356 transitions. [2019-12-27 15:09:54,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 356 transitions. [2019-12-27 15:09:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:54,745 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:54,745 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:54,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:54,946 INFO L410 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1607786351, now seen corresponding path program 166 times [2019-12-27 15:09:54,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:54,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406182062] [2019-12-27 15:09:54,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:55,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406182062] [2019-12-27 15:09:55,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489186733] [2019-12-27 15:09:55,029 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:55,072 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:09:55,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:55,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:55,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:55,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:55,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:55,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [449069848] [2019-12-27 15:09:55,582 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:55,582 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:55,584 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:55,584 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:55,584 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:55,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:55,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:55,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=210, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:55,585 INFO L87 Difference]: Start difference. First operand 157 states and 356 transitions. Second operand 10 states. [2019-12-27 15:09:56,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:56,754 INFO L93 Difference]: Finished difference Result 207 states and 453 transitions. [2019-12-27 15:09:56,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:56,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:56,755 INFO L225 Difference]: With dead ends: 207 [2019-12-27 15:09:56,755 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 15:09:56,756 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=168, Invalid=336, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 15:09:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 158. [2019-12-27 15:09:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 360 transitions. [2019-12-27 15:09:56,759 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 360 transitions. Word has length 14 [2019-12-27 15:09:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:56,760 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 360 transitions. [2019-12-27 15:09:56,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 360 transitions. [2019-12-27 15:09:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:56,760 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:56,760 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:56,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:56,961 INFO L410 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:56,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1607786506, now seen corresponding path program 167 times [2019-12-27 15:09:56,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:56,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306880877] [2019-12-27 15:09:56,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:57,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306880877] [2019-12-27 15:09:57,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245807552] [2019-12-27 15:09:57,058 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:57,096 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:09:57,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:57,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:57,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:57,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:57,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:57,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [25362512] [2019-12-27 15:09:57,812 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:57,813 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:57,814 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:57,814 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:57,815 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:57,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:57,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:57,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=209, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:09:57,815 INFO L87 Difference]: Start difference. First operand 158 states and 360 transitions. Second operand 10 states. [2019-12-27 15:09:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:58,484 INFO L93 Difference]: Finished difference Result 203 states and 443 transitions. [2019-12-27 15:09:58,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:58,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:58,485 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:09:58,485 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 15:09:58,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=333, Unknown=2, NotChecked=0, Total=506 [2019-12-27 15:09:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 15:09:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 156. [2019-12-27 15:09:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 15:09:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 352 transitions. [2019-12-27 15:09:58,489 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 352 transitions. Word has length 14 [2019-12-27 15:09:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:58,489 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 352 transitions. [2019-12-27 15:09:58,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 352 transitions. [2019-12-27 15:09:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:58,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:58,489 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:58,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:58,690 INFO L410 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:58,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1607930501, now seen corresponding path program 168 times [2019-12-27 15:09:58,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:58,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715081454] [2019-12-27 15:09:58,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:58,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715081454] [2019-12-27 15:09:58,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035562445] [2019-12-27 15:09:58,773 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:58,816 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:09:58,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:09:58,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:58,825 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:09:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:58,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:09:58,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:09:58,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [884000699] [2019-12-27 15:09:58,929 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:09:58,930 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:09:58,932 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:09:58,932 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:09:58,932 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:09:58,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:09:58,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:09:58,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:09:58,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:09:58,933 INFO L87 Difference]: Start difference. First operand 156 states and 352 transitions. Second operand 10 states. [2019-12-27 15:09:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:09:59,113 INFO L93 Difference]: Finished difference Result 203 states and 443 transitions. [2019-12-27 15:09:59,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:09:59,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:09:59,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:09:59,114 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:09:59,114 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 15:09:59,114 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:09:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 15:09:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 158. [2019-12-27 15:09:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 15:09:59,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2019-12-27 15:09:59,117 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 14 [2019-12-27 15:09:59,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:09:59,118 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2019-12-27 15:09:59,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:09:59,118 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2019-12-27 15:09:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:09:59,118 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:09:59,118 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:09:59,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:59,322 INFO L410 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:09:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:09:59,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1607930656, now seen corresponding path program 169 times [2019-12-27 15:09:59,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:09:59,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096768959] [2019-12-27 15:09:59,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:09:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:09:59,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096768959] [2019-12-27 15:09:59,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232831759] [2019-12-27 15:09:59,396 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:09:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:09:59,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:09:59,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:00,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:00,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:00,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [436464594] [2019-12-27 15:10:00,847 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:00,847 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:00,849 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:00,850 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:00,850 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:00,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:00,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:00,850 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand 10 states. [2019-12-27 15:10:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:01,062 INFO L93 Difference]: Finished difference Result 200 states and 437 transitions. [2019-12-27 15:10:01,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:01,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:01,063 INFO L225 Difference]: With dead ends: 200 [2019-12-27 15:10:01,063 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:10:01,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:10:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2019-12-27 15:10:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 15:10:01,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 355 transitions. [2019-12-27 15:10:01,067 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 355 transitions. Word has length 14 [2019-12-27 15:10:01,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:01,067 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 355 transitions. [2019-12-27 15:10:01,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 355 transitions. [2019-12-27 15:10:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:01,068 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:01,068 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:01,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:01,271 INFO L410 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935306, now seen corresponding path program 170 times [2019-12-27 15:10:01,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:01,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257734068] [2019-12-27 15:10:01,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:01,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257734068] [2019-12-27 15:10:01,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135161303] [2019-12-27 15:10:01,351 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:01,390 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:01,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:01,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:01,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:01,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:01,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:01,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [851014159] [2019-12-27 15:10:01,510 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:01,511 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:01,513 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:10:01,513 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:01,513 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:10:01,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:01,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:01,514 INFO L87 Difference]: Start difference. First operand 157 states and 355 transitions. Second operand 10 states. [2019-12-27 15:10:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:01,714 INFO L93 Difference]: Finished difference Result 186 states and 408 transitions. [2019-12-27 15:10:01,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:01,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:01,720 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:10:01,720 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:10:01,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:10:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:10:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 154. [2019-12-27 15:10:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:10:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 347 transitions. [2019-12-27 15:10:01,722 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 347 transitions. Word has length 14 [2019-12-27 15:10:01,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:01,723 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 347 transitions. [2019-12-27 15:10:01,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 347 transitions. [2019-12-27 15:10:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:01,723 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:01,723 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:01,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:01,924 INFO L410 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:01,924 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 171 times [2019-12-27 15:10:01,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:01,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803713095] [2019-12-27 15:10:01,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:02,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803713095] [2019-12-27 15:10:02,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186842492] [2019-12-27 15:10:02,038 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:02,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:10:02,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:02,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:02,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:02,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:02,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:02,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [132656147] [2019-12-27 15:10:02,300 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:02,301 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:02,306 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 50 transitions. [2019-12-27 15:10:02,307 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:02,311 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 15 times. [2019-12-27 15:10:02,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:02,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:02,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:02,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:02,312 INFO L87 Difference]: Start difference. First operand 154 states and 347 transitions. Second operand 10 states. [2019-12-27 15:10:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:02,588 INFO L93 Difference]: Finished difference Result 180 states and 397 transitions. [2019-12-27 15:10:02,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:02,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:02,589 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:10:02,589 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 15:10:02,589 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 15:10:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2019-12-27 15:10:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:10:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-27 15:10:02,592 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-27 15:10:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:02,592 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-27 15:10:02,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-27 15:10:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:02,593 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:02,593 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:02,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:02,796 INFO L410 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:02,796 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 172 times [2019-12-27 15:10:02,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:02,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146011979] [2019-12-27 15:10:02,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:02,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146011979] [2019-12-27 15:10:02,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330695268] [2019-12-27 15:10:02,878 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:02,921 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:02,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:02,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:02,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:03,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:03,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:03,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1996764040] [2019-12-27 15:10:03,068 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:03,068 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:03,071 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:03,071 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:03,072 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:03,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:03,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:03,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:03,073 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 10 states. [2019-12-27 15:10:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:03,435 INFO L93 Difference]: Finished difference Result 185 states and 406 transitions. [2019-12-27 15:10:03,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:03,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:03,437 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:10:03,437 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 15:10:03,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 15:10:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 151. [2019-12-27 15:10:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:10:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 346 transitions. [2019-12-27 15:10:03,440 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 346 transitions. Word has length 14 [2019-12-27 15:10:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:03,441 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 346 transitions. [2019-12-27 15:10:03,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 346 transitions. [2019-12-27 15:10:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:03,441 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:03,441 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:03,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,643 INFO L410 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:03,644 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 173 times [2019-12-27 15:10:03,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:03,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071719327] [2019-12-27 15:10:03,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:03,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071719327] [2019-12-27 15:10:03,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620521619] [2019-12-27 15:10:03,734 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:03,777 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:10:03,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:03,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:03,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:03,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:03,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:03,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1584885306] [2019-12-27 15:10:03,896 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:03,897 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:03,899 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:03,899 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:03,901 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:03,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:03,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:03,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:03,902 INFO L87 Difference]: Start difference. First operand 151 states and 346 transitions. Second operand 10 states. [2019-12-27 15:10:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:04,223 INFO L93 Difference]: Finished difference Result 195 states and 427 transitions. [2019-12-27 15:10:04,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:04,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:04,225 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:10:04,225 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:10:04,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:10:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 152. [2019-12-27 15:10:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:10:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:10:04,228 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:10:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:04,228 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:10:04,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:10:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:04,229 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:04,229 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:04,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:04,433 INFO L410 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:04,434 INFO L82 PathProgramCache]: Analyzing trace with hash -591352520, now seen corresponding path program 174 times [2019-12-27 15:10:04,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:04,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320566599] [2019-12-27 15:10:04,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:04,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320566599] [2019-12-27 15:10:04,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992816418] [2019-12-27 15:10:04,566 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:04,621 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:04,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:04,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:04,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:04,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:04,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:04,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1917012269] [2019-12-27 15:10:04,769 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:04,770 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:04,781 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 44 transitions. [2019-12-27 15:10:04,781 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:04,783 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 12 times. [2019-12-27 15:10:04,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:04,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:04,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:04,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:04,784 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:10:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:04,994 INFO L93 Difference]: Finished difference Result 183 states and 405 transitions. [2019-12-27 15:10:04,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:04,994 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:04,995 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:10:04,995 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:10:04,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:10:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 150. [2019-12-27 15:10:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:10:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-27 15:10:04,999 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-27 15:10:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:04,999 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-27 15:10:04,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-27 15:10:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:04,999 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:05,000 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:05,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,201 INFO L410 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash -595816365, now seen corresponding path program 175 times [2019-12-27 15:10:05,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:05,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725959325] [2019-12-27 15:10:05,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:05,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725959325] [2019-12-27 15:10:05,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297123626] [2019-12-27 15:10:05,339 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:05,386 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:05,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:11,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:11,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:11,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1130396157] [2019-12-27 15:10:11,619 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:11,620 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:11,622 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:11,623 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:11,624 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:11,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:11,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:11,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:11,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:11,625 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 10 states. [2019-12-27 15:10:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:14,753 INFO L93 Difference]: Finished difference Result 191 states and 418 transitions. [2019-12-27 15:10:14,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:10:14,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:14,754 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:10:14,754 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:10:14,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=200, Invalid=447, Unknown=3, NotChecked=0, Total=650 [2019-12-27 15:10:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:10:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 152. [2019-12-27 15:10:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:10:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:10:14,758 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:10:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:14,758 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:10:14,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:10:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:14,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:14,759 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:14,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:14,962 INFO L410 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:14,963 INFO L82 PathProgramCache]: Analyzing trace with hash -595821015, now seen corresponding path program 176 times [2019-12-27 15:10:14,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:14,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150319068] [2019-12-27 15:10:14,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:15,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150319068] [2019-12-27 15:10:15,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26887225] [2019-12-27 15:10:15,050 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:15,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:15,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:15,096 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:15,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:15,534 WARN L192 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-12-27 15:10:16,563 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:17,009 WARN L192 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 15:10:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:17,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:17,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:17,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [171274414] [2019-12-27 15:10:17,011 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:17,011 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:17,014 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:17,014 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:17,015 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:17,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:17,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:17,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=218, Unknown=2, NotChecked=0, Total=306 [2019-12-27 15:10:17,015 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:10:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:19,704 INFO L93 Difference]: Finished difference Result 198 states and 433 transitions. [2019-12-27 15:10:19,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:19,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:19,705 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:10:19,705 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:10:19,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=169, Invalid=378, Unknown=5, NotChecked=0, Total=552 [2019-12-27 15:10:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:10:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 153. [2019-12-27 15:10:19,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:10:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:10:19,709 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:10:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:19,709 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:10:19,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:19,709 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:10:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:19,709 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:19,709 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:19,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:19,910 INFO L410 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:19,910 INFO L82 PathProgramCache]: Analyzing trace with hash -595821170, now seen corresponding path program 177 times [2019-12-27 15:10:19,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:19,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554048909] [2019-12-27 15:10:19,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:20,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554048909] [2019-12-27 15:10:20,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672553518] [2019-12-27 15:10:20,003 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:20,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:10:20,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:20,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:20,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:22,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:22,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:22,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [95284982] [2019-12-27 15:10:22,123 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:22,123 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:22,125 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:22,125 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:22,127 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:22,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:22,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:22,127 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:10:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:25,306 INFO L93 Difference]: Finished difference Result 189 states and 418 transitions. [2019-12-27 15:10:25,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:25,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:25,307 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:10:25,307 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:10:25,307 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=168, Invalid=378, Unknown=6, NotChecked=0, Total=552 [2019-12-27 15:10:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:10:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 151. [2019-12-27 15:10:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:10:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 346 transitions. [2019-12-27 15:10:25,310 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 346 transitions. Word has length 14 [2019-12-27 15:10:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:25,310 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 346 transitions. [2019-12-27 15:10:25,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 346 transitions. [2019-12-27 15:10:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:25,311 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:25,311 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:25,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:25,514 INFO L410 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash -595965165, now seen corresponding path program 178 times [2019-12-27 15:10:25,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:25,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318582752] [2019-12-27 15:10:25,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:25,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318582752] [2019-12-27 15:10:25,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388182584] [2019-12-27 15:10:25,676 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:25,741 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:25,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:25,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:25,743 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:26,458 WARN L192 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:26,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:26,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:26,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1250262711] [2019-12-27 15:10:26,482 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:26,482 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:26,485 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:26,485 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:26,486 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:26,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:26,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:26,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:26,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:26,487 INFO L87 Difference]: Start difference. First operand 151 states and 346 transitions. Second operand 10 states. [2019-12-27 15:10:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:28,062 INFO L93 Difference]: Finished difference Result 205 states and 448 transitions. [2019-12-27 15:10:28,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:28,062 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:28,063 INFO L225 Difference]: With dead ends: 205 [2019-12-27 15:10:28,063 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 15:10:28,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=170, Invalid=380, Unknown=2, NotChecked=0, Total=552 [2019-12-27 15:10:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 15:10:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2019-12-27 15:10:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:10:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:10:28,068 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:10:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:28,068 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:10:28,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:10:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:28,069 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:28,069 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:28,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:28,272 INFO L410 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:28,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:28,272 INFO L82 PathProgramCache]: Analyzing trace with hash -595965320, now seen corresponding path program 179 times [2019-12-27 15:10:28,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:28,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60667601] [2019-12-27 15:10:28,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:28,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60667601] [2019-12-27 15:10:28,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281839372] [2019-12-27 15:10:28,366 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:28,407 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:10:28,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:28,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:28,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:28,895 WARN L192 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 15:10:29,979 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 15:10:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:29,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:29,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:29,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1168485318] [2019-12-27 15:10:29,981 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:29,981 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:29,984 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:29,984 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:29,985 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:29,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:29,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:29,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:29,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:29,985 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:10:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:31,616 INFO L93 Difference]: Finished difference Result 198 states and 434 transitions. [2019-12-27 15:10:31,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:10:31,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:31,617 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:10:31,617 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:10:31,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=182, Invalid=416, Unknown=2, NotChecked=0, Total=600 [2019-12-27 15:10:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:10:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 152. [2019-12-27 15:10:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:10:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:10:31,621 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:10:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:31,622 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:10:31,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:10:31,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:31,622 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:31,623 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:31,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:31,826 INFO L410 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:31,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:31,826 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 180 times [2019-12-27 15:10:31,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:31,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875649429] [2019-12-27 15:10:31,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:31,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875649429] [2019-12-27 15:10:31,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105564466] [2019-12-27 15:10:31,905 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:31,953 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:10:31,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:31,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:31,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:32,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:32,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:32,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [896460699] [2019-12-27 15:10:32,240 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:32,241 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:32,243 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:32,243 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:32,244 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:32,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:32,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:32,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:32,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:32,245 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:10:33,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:33,111 INFO L93 Difference]: Finished difference Result 202 states and 446 transitions. [2019-12-27 15:10:33,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:33,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:33,112 INFO L225 Difference]: With dead ends: 202 [2019-12-27 15:10:33,112 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 15:10:33,112 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=382, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:10:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 15:10:33,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 153. [2019-12-27 15:10:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:10:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 353 transitions. [2019-12-27 15:10:33,116 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 353 transitions. Word has length 14 [2019-12-27 15:10:33,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:33,116 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 353 transitions. [2019-12-27 15:10:33,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 353 transitions. [2019-12-27 15:10:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:33,117 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:33,117 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:33,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:33,318 INFO L410 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -595970125, now seen corresponding path program 181 times [2019-12-27 15:10:33,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:33,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716550877] [2019-12-27 15:10:33,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:33,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716550877] [2019-12-27 15:10:33,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849825355] [2019-12-27 15:10:33,402 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:33,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:33,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:33,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:33,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:33,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1360255803] [2019-12-27 15:10:33,571 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:33,571 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:33,573 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 38 transitions. [2019-12-27 15:10:33,574 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:33,575 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 9 times. [2019-12-27 15:10:33,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:33,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:33,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:33,576 INFO L87 Difference]: Start difference. First operand 153 states and 353 transitions. Second operand 10 states. [2019-12-27 15:10:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:33,771 INFO L93 Difference]: Finished difference Result 183 states and 404 transitions. [2019-12-27 15:10:33,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:10:33,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:33,772 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:10:33,772 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:10:33,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:10:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:10:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 150. [2019-12-27 15:10:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:10:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 343 transitions. [2019-12-27 15:10:33,775 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 343 transitions. Word has length 14 [2019-12-27 15:10:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:33,775 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 343 transitions. [2019-12-27 15:10:33,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 343 transitions. [2019-12-27 15:10:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:33,776 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:33,776 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:33,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:33,977 INFO L410 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -734344515, now seen corresponding path program 182 times [2019-12-27 15:10:33,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:33,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12842745] [2019-12-27 15:10:33,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:34,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12842745] [2019-12-27 15:10:34,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962054622] [2019-12-27 15:10:34,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:34,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:10:34,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:34,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:34,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:42,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:42,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:42,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [400430850] [2019-12-27 15:10:42,387 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:42,388 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:42,390 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:42,390 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:42,391 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:10:42,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:42,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:42,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:42,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:42,392 INFO L87 Difference]: Start difference. First operand 150 states and 343 transitions. Second operand 10 states. [2019-12-27 15:10:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:44,768 INFO L93 Difference]: Finished difference Result 193 states and 422 transitions. [2019-12-27 15:10:44,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:10:44,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:44,770 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:10:44,770 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:10:44,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=185, Invalid=414, Unknown=1, NotChecked=0, Total=600 [2019-12-27 15:10:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:10:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 153. [2019-12-27 15:10:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:10:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:10:44,773 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:10:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:44,773 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:10:44,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:10:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:44,774 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:44,774 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:44,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:44,974 INFO L410 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:44,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:44,975 INFO L82 PathProgramCache]: Analyzing trace with hash -734349165, now seen corresponding path program 183 times [2019-12-27 15:10:44,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:44,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169351690] [2019-12-27 15:10:44,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:45,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169351690] [2019-12-27 15:10:45,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650902271] [2019-12-27 15:10:45,063 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:45,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:10:45,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:45,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:45,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:45,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:45,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:45,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1753504631] [2019-12-27 15:10:45,870 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:45,870 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:45,872 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:45,872 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:45,873 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:10:45,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:45,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:45,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=220, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:10:45,874 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:10:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:54,640 INFO L93 Difference]: Finished difference Result 191 states and 416 transitions. [2019-12-27 15:10:54,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:10:54,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:54,641 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:10:54,641 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:10:54,642 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=200, Invalid=441, Unknown=9, NotChecked=0, Total=650 [2019-12-27 15:10:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:10:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 154. [2019-12-27 15:10:54,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:10:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-27 15:10:54,645 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-27 15:10:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:54,645 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-27 15:10:54,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-27 15:10:54,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:54,646 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:54,646 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:10:54,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:54,847 INFO L410 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:10:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:10:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash -734349320, now seen corresponding path program 184 times [2019-12-27 15:10:54,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:10:54,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166272006] [2019-12-27 15:10:54,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:10:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:10:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:54,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166272006] [2019-12-27 15:10:54,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075179011] [2019-12-27 15:10:54,930 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:10:54,973 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:10:54,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:10:54,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:10:54,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:10:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:10:59,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:10:59,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:10:59,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [757966402] [2019-12-27 15:10:59,302 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:10:59,303 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:10:59,306 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:10:59,306 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:10:59,307 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:10:59,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:10:59,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:10:59,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:10:59,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:10:59,307 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 10 states. [2019-12-27 15:10:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:10:59,895 INFO L93 Difference]: Finished difference Result 197 states and 433 transitions. [2019-12-27 15:10:59,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:10:59,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:10:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:10:59,896 INFO L225 Difference]: With dead ends: 197 [2019-12-27 15:10:59,896 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 15:10:59,897 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:10:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 15:10:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 152. [2019-12-27 15:10:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:10:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:10:59,900 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:10:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:10:59,900 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:10:59,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:10:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:10:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:10:59,901 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:10:59,901 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:00,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:00,102 INFO L410 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:00,102 INFO L82 PathProgramCache]: Analyzing trace with hash -734493315, now seen corresponding path program 185 times [2019-12-27 15:11:00,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:00,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319468607] [2019-12-27 15:11:00,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:00,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319468607] [2019-12-27 15:11:00,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476696344] [2019-12-27 15:11:00,185 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:00,223 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:00,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:00,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:00,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:00,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:00,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:00,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1357725167] [2019-12-27 15:11:00,366 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:00,367 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:00,369 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:00,369 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:00,370 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:00,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:00,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:00,370 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:11:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:00,683 INFO L93 Difference]: Finished difference Result 195 states and 425 transitions. [2019-12-27 15:11:00,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:00,684 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:00,684 INFO L225 Difference]: With dead ends: 195 [2019-12-27 15:11:00,684 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:11:00,685 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:11:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 154. [2019-12-27 15:11:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-27 15:11:00,688 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-27 15:11:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:00,688 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-27 15:11:00,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-27 15:11:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:00,689 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:00,689 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:00,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:00,890 INFO L410 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash -734493470, now seen corresponding path program 186 times [2019-12-27 15:11:00,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:00,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529091968] [2019-12-27 15:11:00,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:00,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529091968] [2019-12-27 15:11:00,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855921247] [2019-12-27 15:11:00,977 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:01,017 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:01,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:01,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:01,019 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:01,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:01,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:01,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [848839215] [2019-12-27 15:11:01,183 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:01,184 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:01,186 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:01,186 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:01,187 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:01,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:01,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:01,187 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 10 states. [2019-12-27 15:11:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:01,478 INFO L93 Difference]: Finished difference Result 194 states and 428 transitions. [2019-12-27 15:11:01,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:01,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:01,479 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:11:01,480 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:11:01,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:11:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 153. [2019-12-27 15:11:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:11:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:11:01,483 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:11:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:01,483 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:11:01,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:11:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:01,483 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:01,483 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:01,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:01,684 INFO L410 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash -734498120, now seen corresponding path program 187 times [2019-12-27 15:11:01,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:01,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732971287] [2019-12-27 15:11:01,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:01,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732971287] [2019-12-27 15:11:01,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384271490] [2019-12-27 15:11:01,772 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:01,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:01,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:01,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:01,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:01,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1164958948] [2019-12-27 15:11:01,984 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:01,985 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:01,987 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:01,987 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:01,988 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:01,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:01,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:01,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:01,989 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:11:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:08,329 INFO L93 Difference]: Finished difference Result 199 states and 436 transitions. [2019-12-27 15:11:08,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:08,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:08,330 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:11:08,331 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:11:08,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=186, Invalid=411, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:11:08,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:11:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2019-12-27 15:11:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 356 transitions. [2019-12-27 15:11:08,334 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 356 transitions. Word has length 14 [2019-12-27 15:11:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:08,334 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 356 transitions. [2019-12-27 15:11:08,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 356 transitions. [2019-12-27 15:11:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:08,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:08,335 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:08,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:08,536 INFO L410 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:08,536 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 188 times [2019-12-27 15:11:08,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:08,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719423296] [2019-12-27 15:11:08,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:08,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719423296] [2019-12-27 15:11:08,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576770905] [2019-12-27 15:11:08,622 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:08,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:08,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:08,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:08,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:08,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:08,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:08,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [849879162] [2019-12-27 15:11:08,883 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:08,884 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:08,886 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:08,886 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:08,887 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:08,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:08,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:08,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:08,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:08,887 INFO L87 Difference]: Start difference. First operand 154 states and 356 transitions. Second operand 10 states. [2019-12-27 15:11:09,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:09,171 INFO L93 Difference]: Finished difference Result 188 states and 413 transitions. [2019-12-27 15:11:09,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:09,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:09,172 INFO L225 Difference]: With dead ends: 188 [2019-12-27 15:11:09,172 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 15:11:09,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 15:11:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2019-12-27 15:11:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 15:11:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 346 transitions. [2019-12-27 15:11:09,176 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 346 transitions. Word has length 14 [2019-12-27 15:11:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:09,176 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 346 transitions. [2019-12-27 15:11:09,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:09,177 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 346 transitions. [2019-12-27 15:11:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:09,177 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:09,177 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:09,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:09,380 INFO L410 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:09,381 INFO L82 PathProgramCache]: Analyzing trace with hash -738961965, now seen corresponding path program 189 times [2019-12-27 15:11:09,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:09,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611887533] [2019-12-27 15:11:09,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:09,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611887533] [2019-12-27 15:11:09,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780231629] [2019-12-27 15:11:09,468 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:09,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:09,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:09,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:09,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:09,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:09,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:09,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1245453448] [2019-12-27 15:11:09,632 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:09,633 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:09,636 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:09,636 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:09,637 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:09,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:09,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:09,638 INFO L87 Difference]: Start difference. First operand 151 states and 346 transitions. Second operand 10 states. [2019-12-27 15:11:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:09,868 INFO L93 Difference]: Finished difference Result 198 states and 431 transitions. [2019-12-27 15:11:09,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:09,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:09,870 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:11:09,870 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:11:09,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:11:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 154. [2019-12-27 15:11:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 355 transitions. [2019-12-27 15:11:09,873 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 355 transitions. Word has length 14 [2019-12-27 15:11:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:09,874 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 355 transitions. [2019-12-27 15:11:09,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 355 transitions. [2019-12-27 15:11:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:09,874 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:09,874 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:10,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:10,075 INFO L410 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:10,075 INFO L82 PathProgramCache]: Analyzing trace with hash -738962120, now seen corresponding path program 190 times [2019-12-27 15:11:10,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:10,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402613859] [2019-12-27 15:11:10,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:10,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402613859] [2019-12-27 15:11:10,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364973906] [2019-12-27 15:11:10,164 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:10,217 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:10,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:10,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:10,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:17,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:17,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:17,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [933566187] [2019-12-27 15:11:17,004 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:17,005 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:17,007 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:17,008 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:17,009 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:17,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:17,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:17,009 INFO L87 Difference]: Start difference. First operand 154 states and 355 transitions. Second operand 10 states. [2019-12-27 15:11:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:25,397 INFO L93 Difference]: Finished difference Result 204 states and 445 transitions. [2019-12-27 15:11:25,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:25,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:25,398 INFO L225 Difference]: With dead ends: 204 [2019-12-27 15:11:25,398 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 15:11:25,398 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=201, Invalid=445, Unknown=4, NotChecked=0, Total=650 [2019-12-27 15:11:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 15:11:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 153. [2019-12-27 15:11:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:11:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 352 transitions. [2019-12-27 15:11:25,402 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 352 transitions. Word has length 14 [2019-12-27 15:11:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:25,402 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 352 transitions. [2019-12-27 15:11:25,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 352 transitions. [2019-12-27 15:11:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:25,403 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:25,403 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:25,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:25,603 INFO L410 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:25,604 INFO L82 PathProgramCache]: Analyzing trace with hash -738966770, now seen corresponding path program 191 times [2019-12-27 15:11:25,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:25,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906375860] [2019-12-27 15:11:25,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:25,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906375860] [2019-12-27 15:11:25,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865466436] [2019-12-27 15:11:25,697 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:25,740 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:11:25,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:25,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:25,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:25,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:25,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:25,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [861832277] [2019-12-27 15:11:25,911 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:25,912 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:25,914 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:25,914 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:25,915 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:25,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:25,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:25,916 INFO L87 Difference]: Start difference. First operand 153 states and 352 transitions. Second operand 10 states. [2019-12-27 15:11:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:26,284 INFO L93 Difference]: Finished difference Result 199 states and 433 transitions. [2019-12-27 15:11:26,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:26,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:26,285 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:11:26,285 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:11:26,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:11:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 154. [2019-12-27 15:11:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 356 transitions. [2019-12-27 15:11:26,289 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 356 transitions. Word has length 14 [2019-12-27 15:11:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:26,289 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 356 transitions. [2019-12-27 15:11:26,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 356 transitions. [2019-12-27 15:11:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:26,290 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:26,290 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:26,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:26,491 INFO L410 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:26,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash -738966925, now seen corresponding path program 192 times [2019-12-27 15:11:26,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:26,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188502993] [2019-12-27 15:11:26,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:26,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188502993] [2019-12-27 15:11:26,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051024718] [2019-12-27 15:11:26,582 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:26,623 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:26,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:26,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:26,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:26,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:26,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:26,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1638044797] [2019-12-27 15:11:26,792 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:26,793 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:26,795 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:26,795 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:26,796 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:26,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:26,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:26,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:26,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:26,796 INFO L87 Difference]: Start difference. First operand 154 states and 356 transitions. Second operand 10 states. [2019-12-27 15:11:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:27,131 INFO L93 Difference]: Finished difference Result 194 states and 422 transitions. [2019-12-27 15:11:27,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:27,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:27,132 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:11:27,132 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:11:27,133 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:11:27,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:11:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 152. [2019-12-27 15:11:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 15:11:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 349 transitions. [2019-12-27 15:11:27,136 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 349 transitions. Word has length 14 [2019-12-27 15:11:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:27,136 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 349 transitions. [2019-12-27 15:11:27,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 349 transitions. [2019-12-27 15:11:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:27,136 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:27,136 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:27,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:27,337 INFO L410 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash -739110920, now seen corresponding path program 193 times [2019-12-27 15:11:27,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:27,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59124384] [2019-12-27 15:11:27,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:27,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59124384] [2019-12-27 15:11:27,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208612534] [2019-12-27 15:11:27,427 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:27,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:27,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:27,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:27,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:27,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [122401236] [2019-12-27 15:11:27,585 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:27,586 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:27,588 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:27,589 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:27,589 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:27,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:27,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:27,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:27,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:27,590 INFO L87 Difference]: Start difference. First operand 152 states and 349 transitions. Second operand 10 states. [2019-12-27 15:11:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:27,834 INFO L93 Difference]: Finished difference Result 198 states and 435 transitions. [2019-12-27 15:11:27,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:27,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:27,836 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:11:27,836 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:11:27,836 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:11:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 154. [2019-12-27 15:11:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 357 transitions. [2019-12-27 15:11:27,839 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 357 transitions. Word has length 14 [2019-12-27 15:11:27,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:27,840 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 357 transitions. [2019-12-27 15:11:27,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 357 transitions. [2019-12-27 15:11:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:27,840 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:27,841 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:28,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:28,041 INFO L410 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash -739111075, now seen corresponding path program 194 times [2019-12-27 15:11:28,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:28,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939616365] [2019-12-27 15:11:28,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:28,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939616365] [2019-12-27 15:11:28,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747471290] [2019-12-27 15:11:28,135 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:28,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:28,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:28,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:28,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:28,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:28,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:28,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1511138555] [2019-12-27 15:11:28,319 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:28,320 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:28,322 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:28,322 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:28,323 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:28,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:28,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:28,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:28,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:28,323 INFO L87 Difference]: Start difference. First operand 154 states and 357 transitions. Second operand 10 states. [2019-12-27 15:11:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:28,703 INFO L93 Difference]: Finished difference Result 196 states and 425 transitions. [2019-12-27 15:11:28,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 15:11:28,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:28,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:28,704 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:11:28,705 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:11:28,705 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:11:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:11:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 153. [2019-12-27 15:11:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 15:11:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 353 transitions. [2019-12-27 15:11:28,708 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 353 transitions. Word has length 14 [2019-12-27 15:11:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:28,708 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 353 transitions. [2019-12-27 15:11:28,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 353 transitions. [2019-12-27 15:11:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:28,709 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:28,709 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:28,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:28,910 INFO L410 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:28,910 INFO L82 PathProgramCache]: Analyzing trace with hash -739115725, now seen corresponding path program 195 times [2019-12-27 15:11:28,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:28,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705070479] [2019-12-27 15:11:28,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:29,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705070479] [2019-12-27 15:11:29,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799449632] [2019-12-27 15:11:29,008 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:29,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:29,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:29,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 15:11:29,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:29,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:29,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:29,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [725840647] [2019-12-27 15:11:29,269 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:29,271 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:29,275 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:29,275 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:29,277 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:29,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:29,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:29,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:29,278 INFO L87 Difference]: Start difference. First operand 153 states and 353 transitions. Second operand 10 states. [2019-12-27 15:11:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:29,581 INFO L93 Difference]: Finished difference Result 192 states and 421 transitions. [2019-12-27 15:11:29,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:29,582 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:29,582 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:11:29,583 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:11:29,583 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:11:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 154. [2019-12-27 15:11:29,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 15:11:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 357 transitions. [2019-12-27 15:11:29,587 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 357 transitions. Word has length 14 [2019-12-27 15:11:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:29,588 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 357 transitions. [2019-12-27 15:11:29,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 357 transitions. [2019-12-27 15:11:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:29,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:29,589 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:29,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:29,793 INFO L410 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:29,794 INFO L82 PathProgramCache]: Analyzing trace with hash -739115880, now seen corresponding path program 196 times [2019-12-27 15:11:29,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:29,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111218023] [2019-12-27 15:11:29,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:29,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111218023] [2019-12-27 15:11:29,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692610689] [2019-12-27 15:11:29,895 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:29,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:29,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:29,940 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:29,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:30,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:30,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:30,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1407640209] [2019-12-27 15:11:30,071 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:30,072 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:30,074 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 32 transitions. [2019-12-27 15:11:30,075 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:30,075 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 6 times. [2019-12-27 15:11:30,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:30,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:30,076 INFO L87 Difference]: Start difference. First operand 154 states and 357 transitions. Second operand 10 states. [2019-12-27 15:11:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:30,261 INFO L93 Difference]: Finished difference Result 171 states and 376 transitions. [2019-12-27 15:11:30,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:30,261 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:30,262 INFO L225 Difference]: With dead ends: 171 [2019-12-27 15:11:30,262 INFO L226 Difference]: Without dead ends: 161 [2019-12-27 15:11:30,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-27 15:11:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2019-12-27 15:11:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 15:11:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 339 transitions. [2019-12-27 15:11:30,265 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 339 transitions. Word has length 14 [2019-12-27 15:11:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:30,265 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 339 transitions. [2019-12-27 15:11:30,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 339 transitions. [2019-12-27 15:11:30,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:30,266 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:30,266 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:30,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:30,466 INFO L410 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:30,467 INFO L82 PathProgramCache]: Analyzing trace with hash -733749869, now seen corresponding path program 197 times [2019-12-27 15:11:30,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:30,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455638726] [2019-12-27 15:11:30,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:30,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455638726] [2019-12-27 15:11:30,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096515225] [2019-12-27 15:11:30,546 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:30,590 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:11:30,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:30,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:30,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:30,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:30,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:30,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [219740634] [2019-12-27 15:11:30,689 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:30,690 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:30,692 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:30,693 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:30,693 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:30,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:30,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:30,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:30,694 INFO L87 Difference]: Start difference. First operand 150 states and 339 transitions. Second operand 10 states. [2019-12-27 15:11:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:30,915 INFO L93 Difference]: Finished difference Result 193 states and 424 transitions. [2019-12-27 15:11:30,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:30,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:30,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:30,916 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:11:30,916 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:11:30,916 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:30,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:11:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 148. [2019-12-27 15:11:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:11:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-27 15:11:30,920 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-27 15:11:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:30,920 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-27 15:11:30,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-27 15:11:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:30,920 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:30,920 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:31,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:31,121 INFO L410 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:31,122 INFO L82 PathProgramCache]: Analyzing trace with hash -733754519, now seen corresponding path program 198 times [2019-12-27 15:11:31,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:31,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427371587] [2019-12-27 15:11:31,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:31,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427371587] [2019-12-27 15:11:31,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740078903] [2019-12-27 15:11:31,201 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:31,244 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:11:31,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:31,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:31,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:31,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:31,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:31,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [830644824] [2019-12-27 15:11:31,363 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:31,364 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:31,365 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:31,365 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:31,366 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:31,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:31,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:31,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:31,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:31,367 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 10 states. [2019-12-27 15:11:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:32,706 INFO L93 Difference]: Finished difference Result 187 states and 408 transitions. [2019-12-27 15:11:32,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:11:32,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:32,707 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:11:32,707 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:11:32,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=193, Invalid=456, Unknown=1, NotChecked=0, Total=650 [2019-12-27 15:11:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:11:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 149. [2019-12-27 15:11:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 339 transitions. [2019-12-27 15:11:32,710 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 339 transitions. Word has length 14 [2019-12-27 15:11:32,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:32,711 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 339 transitions. [2019-12-27 15:11:32,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 339 transitions. [2019-12-27 15:11:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:32,711 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:32,711 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:32,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:32,914 INFO L410 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash -733754674, now seen corresponding path program 199 times [2019-12-27 15:11:32,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:32,915 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432920588] [2019-12-27 15:11:32,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:32,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432920588] [2019-12-27 15:11:32,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930908272] [2019-12-27 15:11:32,999 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:33,042 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:33,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:33,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:33,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:33,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [962098716] [2019-12-27 15:11:33,178 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:33,178 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:33,180 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:33,180 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:33,181 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:33,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:33,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:33,182 INFO L87 Difference]: Start difference. First operand 149 states and 339 transitions. Second operand 10 states. [2019-12-27 15:11:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:33,408 INFO L93 Difference]: Finished difference Result 203 states and 449 transitions. [2019-12-27 15:11:33,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:33,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:33,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:33,409 INFO L225 Difference]: With dead ends: 203 [2019-12-27 15:11:33,409 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 15:11:33,410 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 15:11:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 147. [2019-12-27 15:11:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 15:11:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-27 15:11:33,413 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-27 15:11:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:33,413 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-27 15:11:33,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-27 15:11:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:33,414 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:33,414 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:33,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:33,614 INFO L410 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:33,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:33,615 INFO L82 PathProgramCache]: Analyzing trace with hash -733898669, now seen corresponding path program 200 times [2019-12-27 15:11:33,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:33,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539963948] [2019-12-27 15:11:33,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:33,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539963948] [2019-12-27 15:11:33,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091459961] [2019-12-27 15:11:33,706 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:33,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:33,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:33,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:33,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:33,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:33,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:33,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [607723343] [2019-12-27 15:11:33,884 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:33,884 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:33,886 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:33,887 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:33,887 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:33,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:33,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:33,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:33,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:33,888 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 10 states. [2019-12-27 15:11:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:36,105 INFO L93 Difference]: Finished difference Result 186 states and 406 transitions. [2019-12-27 15:11:36,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:36,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:36,106 INFO L225 Difference]: With dead ends: 186 [2019-12-27 15:11:36,106 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:11:36,106 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=182, Invalid=415, Unknown=3, NotChecked=0, Total=600 [2019-12-27 15:11:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:11:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2019-12-27 15:11:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 339 transitions. [2019-12-27 15:11:36,116 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 339 transitions. Word has length 14 [2019-12-27 15:11:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:36,116 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 339 transitions. [2019-12-27 15:11:36,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 339 transitions. [2019-12-27 15:11:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:36,117 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:36,117 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:36,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:36,318 INFO L410 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:36,318 INFO L82 PathProgramCache]: Analyzing trace with hash -733898824, now seen corresponding path program 201 times [2019-12-27 15:11:36,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:36,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67416041] [2019-12-27 15:11:36,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:36,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67416041] [2019-12-27 15:11:36,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166616068] [2019-12-27 15:11:36,401 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:36,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 15:11:36,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:36,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:36,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:37,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:37,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:37,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1175121090] [2019-12-27 15:11:37,948 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:37,948 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:37,950 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:37,950 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:37,951 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:37,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:37,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:37,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=219, Unknown=1, NotChecked=0, Total=306 [2019-12-27 15:11:37,952 INFO L87 Difference]: Start difference. First operand 149 states and 339 transitions. Second operand 10 states. [2019-12-27 15:11:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:40,437 INFO L93 Difference]: Finished difference Result 194 states and 428 transitions. [2019-12-27 15:11:40,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:40,437 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:40,438 INFO L225 Difference]: With dead ends: 194 [2019-12-27 15:11:40,438 INFO L226 Difference]: Without dead ends: 193 [2019-12-27 15:11:40,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=182, Invalid=412, Unknown=6, NotChecked=0, Total=600 [2019-12-27 15:11:40,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-12-27 15:11:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 148. [2019-12-27 15:11:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:11:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-27 15:11:40,441 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-27 15:11:40,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:40,442 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-27 15:11:40,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-27 15:11:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:40,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:40,442 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:40,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:40,643 INFO L410 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash -733903474, now seen corresponding path program 202 times [2019-12-27 15:11:40,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:40,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943815949] [2019-12-27 15:11:40,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:40,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943815949] [2019-12-27 15:11:40,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217697271] [2019-12-27 15:11:40,724 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:40,771 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:40,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:40,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:40,773 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:41,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:41,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:41,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [682941601] [2019-12-27 15:11:41,004 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:41,005 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:41,006 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:41,007 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:41,007 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:41,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:41,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:41,008 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 10 states. [2019-12-27 15:11:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:41,716 INFO L93 Difference]: Finished difference Result 191 states and 423 transitions. [2019-12-27 15:11:41,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:41,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:41,717 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:11:41,717 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 15:11:41,717 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:11:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 15:11:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2019-12-27 15:11:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 340 transitions. [2019-12-27 15:11:41,720 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 340 transitions. Word has length 14 [2019-12-27 15:11:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:41,721 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 340 transitions. [2019-12-27 15:11:41,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 340 transitions. [2019-12-27 15:11:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:41,721 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:41,721 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:41,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:41,922 INFO L410 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:41,923 INFO L82 PathProgramCache]: Analyzing trace with hash -733903629, now seen corresponding path program 203 times [2019-12-27 15:11:41,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:41,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207367403] [2019-12-27 15:11:41,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207367403] [2019-12-27 15:11:42,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538078803] [2019-12-27 15:11:42,003 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,039 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:42,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:42,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:42,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:42,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:42,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [634672453] [2019-12-27 15:11:42,160 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:42,161 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:42,170 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:42,170 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:42,171 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:42,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:42,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:42,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:42,172 INFO L87 Difference]: Start difference. First operand 149 states and 340 transitions. Second operand 10 states. [2019-12-27 15:11:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:42,367 INFO L93 Difference]: Finished difference Result 198 states and 434 transitions. [2019-12-27 15:11:42,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:42,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:42,368 INFO L225 Difference]: With dead ends: 198 [2019-12-27 15:11:42,369 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 15:11:42,369 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 15:11:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2019-12-27 15:11:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-12-27 15:11:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 330 transitions. [2019-12-27 15:11:42,372 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 330 transitions. Word has length 14 [2019-12-27 15:11:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:42,372 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 330 transitions. [2019-12-27 15:11:42,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 330 transitions. [2019-12-27 15:11:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:42,373 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:42,373 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:42,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,573 INFO L410 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:42,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:42,574 INFO L82 PathProgramCache]: Analyzing trace with hash -738367319, now seen corresponding path program 204 times [2019-12-27 15:11:42,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:42,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804996440] [2019-12-27 15:11:42,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804996440] [2019-12-27 15:11:42,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342685451] [2019-12-27 15:11:42,653 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:42,696 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:42,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:42,697 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:42,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:42,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:42,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:42,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1729869945] [2019-12-27 15:11:42,795 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:42,795 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:42,797 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:42,797 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:42,798 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:42,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:42,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:42,798 INFO L87 Difference]: Start difference. First operand 146 states and 330 transitions. Second operand 10 states. [2019-12-27 15:11:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:43,010 INFO L93 Difference]: Finished difference Result 187 states and 408 transitions. [2019-12-27 15:11:43,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:43,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:43,011 INFO L225 Difference]: With dead ends: 187 [2019-12-27 15:11:43,011 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:11:43,012 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:11:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 149. [2019-12-27 15:11:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 339 transitions. [2019-12-27 15:11:43,015 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 339 transitions. Word has length 14 [2019-12-27 15:11:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:43,015 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 339 transitions. [2019-12-27 15:11:43,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 339 transitions. [2019-12-27 15:11:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:43,016 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:43,016 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:43,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,216 INFO L410 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -738367474, now seen corresponding path program 205 times [2019-12-27 15:11:43,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:43,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456347639] [2019-12-27 15:11:43,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456347639] [2019-12-27 15:11:43,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676240073] [2019-12-27 15:11:43,304 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:43,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:43,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:43,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [348987969] [2019-12-27 15:11:43,457 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:43,458 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:43,460 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:43,460 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:43,460 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:43,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:43,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:43,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:43,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:43,461 INFO L87 Difference]: Start difference. First operand 149 states and 339 transitions. Second operand 10 states. [2019-12-27 15:11:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:43,693 INFO L93 Difference]: Finished difference Result 199 states and 438 transitions. [2019-12-27 15:11:43,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:43,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:43,694 INFO L225 Difference]: With dead ends: 199 [2019-12-27 15:11:43,694 INFO L226 Difference]: Without dead ends: 198 [2019-12-27 15:11:43,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-12-27 15:11:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2019-12-27 15:11:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:11:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-27 15:11:43,698 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-27 15:11:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:43,698 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-27 15:11:43,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-27 15:11:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:43,699 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:43,699 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:43,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:43,900 INFO L410 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:43,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:43,900 INFO L82 PathProgramCache]: Analyzing trace with hash -738372124, now seen corresponding path program 206 times [2019-12-27 15:11:43,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:43,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924798563] [2019-12-27 15:11:43,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:43,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924798563] [2019-12-27 15:11:43,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501558049] [2019-12-27 15:11:43,982 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:44,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:44,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:44,037 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:44,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:44,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1179954859] [2019-12-27 15:11:44,134 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:44,135 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:44,138 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:44,138 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:44,138 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:44,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:44,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:44,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:44,139 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 10 states. [2019-12-27 15:11:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:44,365 INFO L93 Difference]: Finished difference Result 189 states and 414 transitions. [2019-12-27 15:11:44,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:44,366 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:44,366 INFO L225 Difference]: With dead ends: 189 [2019-12-27 15:11:44,367 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 15:11:44,367 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 15:11:44,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 149. [2019-12-27 15:11:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 340 transitions. [2019-12-27 15:11:44,370 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 340 transitions. Word has length 14 [2019-12-27 15:11:44,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:44,370 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 340 transitions. [2019-12-27 15:11:44,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 340 transitions. [2019-12-27 15:11:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:44,371 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:44,371 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:44,571 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,572 INFO L410 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:44,572 INFO L82 PathProgramCache]: Analyzing trace with hash -738372279, now seen corresponding path program 207 times [2019-12-27 15:11:44,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:44,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351051638] [2019-12-27 15:11:44,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351051638] [2019-12-27 15:11:44,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208671960] [2019-12-27 15:11:44,649 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:44,691 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:11:44,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:44,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:44,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:44,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:44,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:44,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [731474511] [2019-12-27 15:11:44,802 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:44,803 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:44,805 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:44,805 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:44,805 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:44,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:44,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:44,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:44,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:44,806 INFO L87 Difference]: Start difference. First operand 149 states and 340 transitions. Second operand 10 states. [2019-12-27 15:11:45,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:45,018 INFO L93 Difference]: Finished difference Result 196 states and 428 transitions. [2019-12-27 15:11:45,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:45,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:45,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:45,019 INFO L225 Difference]: With dead ends: 196 [2019-12-27 15:11:45,019 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 15:11:45,019 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 15:11:45,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 147. [2019-12-27 15:11:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 15:11:45,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-27 15:11:45,022 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-27 15:11:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:45,023 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-27 15:11:45,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:45,023 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-27 15:11:45,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:45,023 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:45,023 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:45,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:45,224 INFO L410 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash -738516274, now seen corresponding path program 208 times [2019-12-27 15:11:45,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:45,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793913249] [2019-12-27 15:11:45,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:45,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793913249] [2019-12-27 15:11:45,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979830164] [2019-12-27 15:11:45,307 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:45,346 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:45,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:45,347 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:45,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:45,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:45,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:45,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [684805505] [2019-12-27 15:11:45,448 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:45,449 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:45,451 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:45,451 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:45,452 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:45,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:45,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:45,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:45,452 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 10 states. [2019-12-27 15:11:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:45,719 INFO L93 Difference]: Finished difference Result 193 states and 423 transitions. [2019-12-27 15:11:45,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:45,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:45,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:45,720 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:11:45,720 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:11:45,720 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:11:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 149. [2019-12-27 15:11:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 341 transitions. [2019-12-27 15:11:45,723 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 341 transitions. Word has length 14 [2019-12-27 15:11:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:45,724 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 341 transitions. [2019-12-27 15:11:45,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 341 transitions. [2019-12-27 15:11:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:45,724 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:45,724 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:45,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:45,925 INFO L410 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:45,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:45,925 INFO L82 PathProgramCache]: Analyzing trace with hash -738516429, now seen corresponding path program 209 times [2019-12-27 15:11:45,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:45,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008058560] [2019-12-27 15:11:45,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:46,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008058560] [2019-12-27 15:11:46,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275616706] [2019-12-27 15:11:46,012 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:46,063 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:11:46,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:46,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:46,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:46,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:46,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:46,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1446405077] [2019-12-27 15:11:46,201 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:46,201 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:46,203 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:46,203 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:46,204 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:46,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:46,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:46,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:46,204 INFO L87 Difference]: Start difference. First operand 149 states and 341 transitions. Second operand 10 states. [2019-12-27 15:11:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:46,459 INFO L93 Difference]: Finished difference Result 190 states and 418 transitions. [2019-12-27 15:11:46,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:46,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:46,460 INFO L225 Difference]: With dead ends: 190 [2019-12-27 15:11:46,460 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 15:11:46,460 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 15:11:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2019-12-27 15:11:46,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 15:11:46,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 337 transitions. [2019-12-27 15:11:46,463 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 337 transitions. Word has length 14 [2019-12-27 15:11:46,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:46,463 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 337 transitions. [2019-12-27 15:11:46,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:46,464 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 337 transitions. [2019-12-27 15:11:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:46,464 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:46,464 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:46,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:46,665 INFO L410 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:46,665 INFO L82 PathProgramCache]: Analyzing trace with hash -738521079, now seen corresponding path program 210 times [2019-12-27 15:11:46,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:46,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96008941] [2019-12-27 15:11:46,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:46,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96008941] [2019-12-27 15:11:46,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010745288] [2019-12-27 15:11:46,743 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:46,786 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:11:46,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:46,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:46,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:46,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:46,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:46,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [658582041] [2019-12-27 15:11:46,900 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:46,901 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:46,902 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:46,903 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:46,903 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:46,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:46,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:46,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:46,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:46,904 INFO L87 Difference]: Start difference. First operand 148 states and 337 transitions. Second operand 10 states. [2019-12-27 15:11:47,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:47,137 INFO L93 Difference]: Finished difference Result 191 states and 419 transitions. [2019-12-27 15:11:47,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:47,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:47,138 INFO L225 Difference]: With dead ends: 191 [2019-12-27 15:11:47,138 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 15:11:47,139 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:47,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 15:11:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 149. [2019-12-27 15:11:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 15:11:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 341 transitions. [2019-12-27 15:11:47,141 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 341 transitions. Word has length 14 [2019-12-27 15:11:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:47,142 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 341 transitions. [2019-12-27 15:11:47,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 341 transitions. [2019-12-27 15:11:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:47,142 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:47,142 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:47,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,343 INFO L410 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:47,344 INFO L82 PathProgramCache]: Analyzing trace with hash -738521234, now seen corresponding path program 211 times [2019-12-27 15:11:47,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:47,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561333530] [2019-12-27 15:11:47,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:47,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561333530] [2019-12-27 15:11:47,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168821466] [2019-12-27 15:11:47,437 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:47,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:47,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:47,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:47,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:47,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1001655929] [2019-12-27 15:11:47,583 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:47,584 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:47,586 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:47,586 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:47,586 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:47,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:47,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:47,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:47,587 INFO L87 Difference]: Start difference. First operand 149 states and 341 transitions. Second operand 10 states. [2019-12-27 15:11:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:47,775 INFO L93 Difference]: Finished difference Result 178 states and 389 transitions. [2019-12-27 15:11:47,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:47,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:47,776 INFO L225 Difference]: With dead ends: 178 [2019-12-27 15:11:47,776 INFO L226 Difference]: Without dead ends: 172 [2019-12-27 15:11:47,777 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:47,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-12-27 15:11:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2019-12-27 15:11:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 15:11:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 327 transitions. [2019-12-27 15:11:47,780 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 327 transitions. Word has length 14 [2019-12-27 15:11:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:47,780 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 327 transitions. [2019-12-27 15:11:47,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 327 transitions. [2019-12-27 15:11:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:47,781 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:47,781 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:47,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:47,981 INFO L410 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:47,982 INFO L82 PathProgramCache]: Analyzing trace with hash -876895469, now seen corresponding path program 212 times [2019-12-27 15:11:47,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:47,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467647389] [2019-12-27 15:11:47,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:48,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467647389] [2019-12-27 15:11:48,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529358195] [2019-12-27 15:11:48,061 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:48,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:48,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:48,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:48,104 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:48,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:48,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:48,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [265762822] [2019-12-27 15:11:48,206 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:48,207 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:48,209 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:48,209 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:48,209 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:48,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:48,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:48,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:48,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:48,210 INFO L87 Difference]: Start difference. First operand 145 states and 327 transitions. Second operand 10 states. [2019-12-27 15:11:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:48,401 INFO L93 Difference]: Finished difference Result 180 states and 383 transitions. [2019-12-27 15:11:48,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:48,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:48,402 INFO L225 Difference]: With dead ends: 180 [2019-12-27 15:11:48,402 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 15:11:48,402 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 15:11:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 141. [2019-12-27 15:11:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:11:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 311 transitions. [2019-12-27 15:11:48,406 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 311 transitions. Word has length 14 [2019-12-27 15:11:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:48,406 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 311 transitions. [2019-12-27 15:11:48,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 311 transitions. [2019-12-27 15:11:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:48,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:48,406 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:48,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:48,607 INFO L410 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash -876895624, now seen corresponding path program 213 times [2019-12-27 15:11:48,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:48,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126561273] [2019-12-27 15:11:48,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:48,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126561273] [2019-12-27 15:11:48,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894476524] [2019-12-27 15:11:48,690 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:48,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:11:48,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:48,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:48,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:49,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:49,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:49,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1220918128] [2019-12-27 15:11:49,238 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:49,245 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:49,246 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:49,246 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:49,247 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:49,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:49,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:49,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:49,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:49,247 INFO L87 Difference]: Start difference. First operand 141 states and 311 transitions. Second operand 10 states. [2019-12-27 15:11:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:49,850 INFO L93 Difference]: Finished difference Result 193 states and 415 transitions. [2019-12-27 15:11:49,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:49,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:49,852 INFO L225 Difference]: With dead ends: 193 [2019-12-27 15:11:49,852 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 15:11:49,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=169, Invalid=382, Unknown=1, NotChecked=0, Total=552 [2019-12-27 15:11:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 15:11:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2019-12-27 15:11:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:11:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 308 transitions. [2019-12-27 15:11:49,855 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 308 transitions. Word has length 14 [2019-12-27 15:11:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:49,855 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 308 transitions. [2019-12-27 15:11:49,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 308 transitions. [2019-12-27 15:11:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:49,855 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:49,855 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:50,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:50,056 INFO L410 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:50,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:50,056 INFO L82 PathProgramCache]: Analyzing trace with hash -876900274, now seen corresponding path program 214 times [2019-12-27 15:11:50,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:50,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973262706] [2019-12-27 15:11:50,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:50,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973262706] [2019-12-27 15:11:50,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491944886] [2019-12-27 15:11:50,137 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:50,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:11:50,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:50,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:50,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:50,750 WARN L192 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-12-27 15:11:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:50,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:50,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:50,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [815626880] [2019-12-27 15:11:50,752 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:50,752 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:50,754 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:50,754 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:50,755 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:50,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:50,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:50,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:50,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:50,755 INFO L87 Difference]: Start difference. First operand 140 states and 308 transitions. Second operand 10 states. [2019-12-27 15:11:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:52,105 INFO L93 Difference]: Finished difference Result 185 states and 396 transitions. [2019-12-27 15:11:52,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:11:52,105 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:52,106 INFO L225 Difference]: With dead ends: 185 [2019-12-27 15:11:52,106 INFO L226 Difference]: Without dead ends: 184 [2019-12-27 15:11:52,106 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=183, Invalid=415, Unknown=2, NotChecked=0, Total=600 [2019-12-27 15:11:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-12-27 15:11:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2019-12-27 15:11:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:11:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 312 transitions. [2019-12-27 15:11:52,109 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 312 transitions. Word has length 14 [2019-12-27 15:11:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:52,110 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 312 transitions. [2019-12-27 15:11:52,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 312 transitions. [2019-12-27 15:11:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:52,110 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:52,111 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:52,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:52,312 INFO L410 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash -876900429, now seen corresponding path program 215 times [2019-12-27 15:11:52,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:52,313 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264421268] [2019-12-27 15:11:52,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:52,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264421268] [2019-12-27 15:11:52,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144463133] [2019-12-27 15:11:52,394 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:52,435 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 15:11:52,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:52,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:52,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:52,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:52,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:52,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [898083470] [2019-12-27 15:11:52,912 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:52,912 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:52,914 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:52,914 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:52,915 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:52,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:52,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:52,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:52,916 INFO L87 Difference]: Start difference. First operand 141 states and 312 transitions. Second operand 10 states. [2019-12-27 15:11:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:53,163 INFO L93 Difference]: Finished difference Result 192 states and 410 transitions. [2019-12-27 15:11:53,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:53,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:53,164 INFO L225 Difference]: With dead ends: 192 [2019-12-27 15:11:53,165 INFO L226 Difference]: Without dead ends: 191 [2019-12-27 15:11:53,165 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:11:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-12-27 15:11:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2019-12-27 15:11:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-12-27 15:11:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 305 transitions. [2019-12-27 15:11:53,168 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 305 transitions. Word has length 14 [2019-12-27 15:11:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:53,168 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 305 transitions. [2019-12-27 15:11:53,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 305 transitions. [2019-12-27 15:11:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:53,169 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:53,169 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:53,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:53,370 INFO L410 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:53,371 INFO L82 PathProgramCache]: Analyzing trace with hash -877044424, now seen corresponding path program 216 times [2019-12-27 15:11:53,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:53,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341526466] [2019-12-27 15:11:53,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:53,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341526466] [2019-12-27 15:11:53,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870961546] [2019-12-27 15:11:53,450 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:53,491 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 15:11:53,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:53,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:53,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:54,017 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_702 Int)) (and (<= (div (+ (* v_~j~0_702 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ (* 2 v_~j~0_702) 2)) (<= c_~i~0 (+ v_~j~0_702 c_~j~0 2)))) is different from true [2019-12-27 15:11:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 15:11:54,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:54,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:54,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2115521157] [2019-12-27 15:11:54,037 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:54,038 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:54,040 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:54,040 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:54,041 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:54,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:54,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=195, Unknown=1, NotChecked=30, Total=306 [2019-12-27 15:11:54,041 INFO L87 Difference]: Start difference. First operand 139 states and 305 transitions. Second operand 10 states. [2019-12-27 15:11:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:54,369 INFO L93 Difference]: Finished difference Result 183 states and 392 transitions. [2019-12-27 15:11:54,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:54,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:54,370 INFO L225 Difference]: With dead ends: 183 [2019-12-27 15:11:54,370 INFO L226 Difference]: Without dead ends: 182 [2019-12-27 15:11:54,371 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=345, Unknown=1, NotChecked=42, Total=552 [2019-12-27 15:11:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-12-27 15:11:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2019-12-27 15:11:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:11:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 313 transitions. [2019-12-27 15:11:54,374 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 313 transitions. Word has length 14 [2019-12-27 15:11:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:54,374 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 313 transitions. [2019-12-27 15:11:54,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 313 transitions. [2019-12-27 15:11:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:54,374 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:54,374 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:54,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:54,575 INFO L410 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:54,575 INFO L82 PathProgramCache]: Analyzing trace with hash -877044579, now seen corresponding path program 217 times [2019-12-27 15:11:54,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:54,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325859640] [2019-12-27 15:11:54,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:54,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325859640] [2019-12-27 15:11:54,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544668813] [2019-12-27 15:11:54,660 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:54,703 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:54,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:55,189 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_705 Int)) (and (<= c_~i~0 (+ v_~j~0_705 c_~j~0 2)) (<= (div (+ (* v_~j~0_705 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ (* 2 v_~j~0_705) 2)))) is different from true [2019-12-27 15:11:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 15:11:55,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:55,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:55,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [544904526] [2019-12-27 15:11:55,657 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:55,658 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:55,660 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:55,660 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:55,661 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:55,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:55,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:55,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=190, Unknown=2, NotChecked=30, Total=306 [2019-12-27 15:11:55,661 INFO L87 Difference]: Start difference. First operand 141 states and 313 transitions. Second operand 10 states. [2019-12-27 15:11:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:11:55,901 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2019-12-27 15:11:55,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:11:55,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:11:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:11:55,902 INFO L225 Difference]: With dead ends: 188 [2019-12-27 15:11:55,902 INFO L226 Difference]: Without dead ends: 187 [2019-12-27 15:11:55,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=166, Invalid=342, Unknown=2, NotChecked=42, Total=552 [2019-12-27 15:11:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-12-27 15:11:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 140. [2019-12-27 15:11:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 15:11:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 309 transitions. [2019-12-27 15:11:55,905 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 309 transitions. Word has length 14 [2019-12-27 15:11:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:11:55,905 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 309 transitions. [2019-12-27 15:11:55,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:11:55,905 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 309 transitions. [2019-12-27 15:11:55,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:11:55,906 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:11:55,906 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:11:56,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:56,107 INFO L410 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:11:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:11:56,107 INFO L82 PathProgramCache]: Analyzing trace with hash -877049229, now seen corresponding path program 218 times [2019-12-27 15:11:56,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:11:56,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731505458] [2019-12-27 15:11:56,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:11:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:11:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:56,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731505458] [2019-12-27 15:11:56,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857772853] [2019-12-27 15:11:56,248 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:11:56,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:11:56,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:11:56,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:11:56,317 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:11:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:11:56,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:11:56,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 15:11:56,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [814103843] [2019-12-27 15:11:56,773 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:11:56,774 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:11:56,777 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:11:56,777 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:11:56,778 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 3 times. [2019-12-27 15:11:56,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:11:56,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:11:56,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:11:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:11:56,779 INFO L87 Difference]: Start difference. First operand 140 states and 309 transitions. Second operand 10 states. [2019-12-27 15:12:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:01,044 INFO L93 Difference]: Finished difference Result 182 states and 387 transitions. [2019-12-27 15:12:01,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:01,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:01,045 INFO L225 Difference]: With dead ends: 182 [2019-12-27 15:12:01,045 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 15:12:01,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=167, Invalid=383, Unknown=2, NotChecked=0, Total=552 [2019-12-27 15:12:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 15:12:01,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 141. [2019-12-27 15:12:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-12-27 15:12:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 313 transitions. [2019-12-27 15:12:01,048 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 313 transitions. Word has length 14 [2019-12-27 15:12:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:01,048 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 313 transitions. [2019-12-27 15:12:01,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 313 transitions. [2019-12-27 15:12:01,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:01,049 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:01,049 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:01,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:01,250 INFO L410 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:01,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash -877049384, now seen corresponding path program 219 times [2019-12-27 15:12:01,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:01,251 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179106046] [2019-12-27 15:12:01,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:01,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179106046] [2019-12-27 15:12:01,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883743501] [2019-12-27 15:12:01,331 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:01,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:12:01,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:01,376 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 15:12:01,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2019-12-27 15:12:01,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:01,608 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 15:12:01,613 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 15:12:01,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 03:12:01 BasicIcfg [2019-12-27 15:12:01,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 15:12:01,614 INFO L168 Benchmark]: Toolchain (without parser) took 294175.27 ms. Allocated memory was 144.7 MB in the beginning and 194.5 MB in the end (delta: 49.8 MB). Free memory was 101.0 MB in the beginning and 97.1 MB in the end (delta: 3.9 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:01,615 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-27 15:12:01,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 736.26 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 100.6 MB in the beginning and 161.2 MB in the end (delta: -60.5 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:01,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.38 ms. Allocated memory is still 201.3 MB. Free memory was 161.2 MB in the beginning and 159.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:01,615 INFO L168 Benchmark]: Boogie Preprocessor took 25.23 ms. Allocated memory is still 201.3 MB. Free memory was 159.2 MB in the beginning and 157.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:01,616 INFO L168 Benchmark]: RCFGBuilder took 463.09 ms. Allocated memory is still 201.3 MB. Free memory was 157.2 MB in the beginning and 137.8 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:01,616 INFO L168 Benchmark]: TraceAbstraction took 292892.66 ms. Allocated memory was 201.3 MB in the beginning and 194.5 MB in the end (delta: -6.8 MB). Free memory was 137.1 MB in the beginning and 97.1 MB in the end (delta: 40.0 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. [2019-12-27 15:12:01,617 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 736.26 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 100.6 MB in the beginning and 161.2 MB in the end (delta: -60.5 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.38 ms. Allocated memory is still 201.3 MB. Free memory was 161.2 MB in the beginning and 159.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.23 ms. Allocated memory is still 201.3 MB. Free memory was 159.2 MB in the beginning and 157.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 463.09 ms. Allocated memory is still 201.3 MB. Free memory was 157.2 MB in the beginning and 137.8 MB in the end (delta: 19.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 292892.66 ms. Allocated memory was 201.3 MB in the beginning and 194.5 MB in the end (delta: -6.8 MB). Free memory was 137.1 MB in the beginning and 97.1 MB in the end (delta: 40.0 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 12 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 292.7s, OverallIterations: 233, TraceHistogramMax: 7, AutomataDifference: 109.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2231 SDtfs, 17995 SDslu, 10288 SDs, 0 SdLazy, 5620 SolverSat, 3529 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5913 GetRequests, 1753 SyntacticMatches, 1 SemanticMatches, 4159 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 16426 ImplicationChecksByTransitivity, 216.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=158occurred in iteration=170, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 232 MinimizatonAttempts, 7942 StatesRemovedByMinimization, 229 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 119.9s InterpolantComputationTime, 5935 NumberOfCodeBlocks, 5935 NumberOfCodeBlocksAsserted, 771 NumberOfCheckSat, 5476 ConstructedInterpolants, 247 QuantifiedInterpolants, 664743 SizeOfPredicates, 0 NumberOfNonLiveVariables, 21317 ConjunctsInSsa, 2516 ConjunctsInUnsatCore, 459 InterpolantComputations, 7 PerfectInterpolantSequences, 36/3470 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown