/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 07:31:42,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 07:31:42,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 07:31:42,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 07:31:42,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 07:31:42,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 07:31:42,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 07:31:42,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 07:31:42,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 07:31:42,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 07:31:42,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 07:31:42,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 07:31:42,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 07:31:42,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 07:31:42,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 07:31:43,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 07:31:43,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 07:31:43,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 07:31:43,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 07:31:43,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 07:31:43,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 07:31:43,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 07:31:43,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 07:31:43,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 07:31:43,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 07:31:43,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 07:31:43,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 07:31:43,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 07:31:43,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 07:31:43,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 07:31:43,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 07:31:43,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 07:31:43,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 07:31:43,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 07:31:43,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 07:31:43,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 07:31:43,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 07:31:43,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 07:31:43,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 07:31:43,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 07:31:43,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 07:31:43,026 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf [2020-04-18 07:31:43,057 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 07:31:43,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 07:31:43,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 07:31:43,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 07:31:43,059 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 07:31:43,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 07:31:43,060 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 07:31:43,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 07:31:43,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 07:31:43,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 07:31:43,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 07:31:43,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 07:31:43,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 07:31:43,061 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 07:31:43,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 07:31:43,061 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 07:31:43,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 07:31:43,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 07:31:43,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 07:31:43,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 07:31:43,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 07:31:43,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:31:43,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 07:31:43,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 07:31:43,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 07:31:43,063 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 07:31:43,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 07:31:43,064 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 07:31:43,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 07:31:43,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 07:31:43,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 07:31:43,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 07:31:43,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 07:31:43,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 07:31:43,391 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 07:31:43,392 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-18 07:31:43,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146192e9c/18344c7545e84745b0900bde57321809/FLAG15898809f [2020-04-18 07:31:44,083 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 07:31:44,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-04-18 07:31:44,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146192e9c/18344c7545e84745b0900bde57321809/FLAG15898809f [2020-04-18 07:31:44,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146192e9c/18344c7545e84745b0900bde57321809 [2020-04-18 07:31:44,339 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 07:31:44,360 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 07:31:44,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:44,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 07:31:44,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 07:31:44,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1460ca5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44, skipping insertion in model container [2020-04-18 07:31:44,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 07:31:44,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 07:31:44,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:44,910 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 07:31:44,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:45,048 INFO L208 MainTranslator]: Completed translation [2020-04-18 07:31:45,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45 WrapperNode [2020-04-18 07:31:45,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:45,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:45,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 07:31:45,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 07:31:45,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:45,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 07:31:45,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 07:31:45,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 07:31:45,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 07:31:45,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 07:31:45,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:31:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 07:31:45,209 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 07:31:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 07:31:45,209 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 07:31:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 07:31:45,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 07:31:45,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 07:31:45,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 07:31:45,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 07:31:45,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 07:31:45,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 07:31:45,213 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 07:31:45,511 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 07:31:45,512 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 07:31:45,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:45 BoogieIcfgContainer [2020-04-18 07:31:45,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 07:31:45,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 07:31:45,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 07:31:45,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 07:31:45,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 07:31:44" (1/3) ... [2020-04-18 07:31:45,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba3d90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:45, skipping insertion in model container [2020-04-18 07:31:45,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (2/3) ... [2020-04-18 07:31:45,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba3d90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:45, skipping insertion in model container [2020-04-18 07:31:45,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:45" (3/3) ... [2020-04-18 07:31:45,531 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-04-18 07:31:45,562 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 07:31:45,562 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 07:31:45,575 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 07:31:45,576 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 07:31:45,616 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,617 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,617 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,617 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,618 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,618 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,618 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,619 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,619 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,619 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,620 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,620 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,620 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,621 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,621 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,621 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,622 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,622 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,622 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,622 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,622 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,623 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,623 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,623 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,624 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,624 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,624 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,625 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,625 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,625 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,629 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,629 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,630 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,630 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,630 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,630 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,636 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,636 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,637 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,637 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,637 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,637 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,653 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 07:31:45,671 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 07:31:45,671 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 07:31:45,672 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 07:31:45,672 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 07:31:45,672 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 07:31:45,672 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 07:31:45,672 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 07:31:45,673 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 07:31:45,688 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,690 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,733 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 07:31:45,733 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:31:45,739 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 07:31:45,742 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,762 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 07:31:45,762 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:31:45,763 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 07:31:45,765 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-18 07:31:45,766 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-18 07:31:47,011 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-18 07:31:47,125 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-18 07:31:47,125 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-18 07:31:47,130 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-18 07:31:47,142 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 07:31:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:31:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:31:47,150 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:47,151 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 07:31:47,152 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-18 07:31:47,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:47,165 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [542435164] [2020-04-18 07:31:47,179 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,193 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:31:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 07:31:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:31:47,196 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 2 times [2020-04-18 07:31:47,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969620666] [2020-04-18 07:31:47,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:47,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969620666] [2020-04-18 07:31:47,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:47,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:47,445 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:47,446 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,448 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:31:47,448 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:47,481 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:47,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:31:47,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 07:31:47,489 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 07:31:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,546 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 07:31:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 07:31:47,547 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:47,548 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [542435164] [2020-04-18 07:31:47,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:47,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 07:31:47,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [542435164] [2020-04-18 07:31:47,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 07:31:47,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:47,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:31:47,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,560 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 07:31:47,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,629 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-18 07:31:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 07:31:47,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 07:31:47,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:47,649 INFO L225 Difference]: With dead ends: 83 [2020-04-18 07:31:47,649 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 07:31:47,651 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 07:31:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-18 07:31:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 07:31:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-18 07:31:47,706 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-18 07:31:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:47,707 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-18 07:31:47,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 07:31:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-18 07:31:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,709 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:47,710 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:47,710 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,711 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-18 07:31:47,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:47,712 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1486990996] [2020-04-18 07:31:47,713 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,717 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 07:31:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 07:31:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,719 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash 235305767, now seen corresponding path program 2 times [2020-04-18 07:31:47,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837135812] [2020-04-18 07:31:47,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:47,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837135812] [2020-04-18 07:31:47,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:47,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:47,866 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:47,867 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,871 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 18 transitions. [2020-04-18 07:31:47,871 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:47,905 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:31:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,906 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 07:31:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,950 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 07:31:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 07:31:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,951 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,952 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 3 times [2020-04-18 07:31:47,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689201235] [2020-04-18 07:31:47,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689201235] [2020-04-18 07:31:48,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:31:48,068 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,068 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,070 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:31:48,070 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,083 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:31:48,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,085 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 5 states. [2020-04-18 07:31:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,116 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 07:31:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 07:31:48,116 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:48,117 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1486990996] [2020-04-18 07:31:48,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:48,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:31:48,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1486990996] [2020-04-18 07:31:48,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 07:31:48,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:48,119 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 6 states. [2020-04-18 07:31:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,272 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-18 07:31:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 07:31:48,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 07:31:48,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:48,276 INFO L225 Difference]: With dead ends: 80 [2020-04-18 07:31:48,276 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 07:31:48,278 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 07:31:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-18 07:31:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 07:31:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-18 07:31:48,288 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-18 07:31:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:48,289 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-18 07:31:48,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 07:31:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-18 07:31:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:48,290 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:48,290 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:48,291 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-18 07:31:48,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:48,292 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [70751564] [2020-04-18 07:31:48,292 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,293 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:31:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-04-18 07:31:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:48,294 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 2 times [2020-04-18 07:31:48,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922368129] [2020-04-18 07:31:48,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922368129] [2020-04-18 07:31:48,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:31:48,370 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,370 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,371 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-04-18 07:31:48,372 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,440 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:48,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:48,441 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2020-04-18 07:31:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,463 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-04-18 07:31:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-04-18 07:31:48,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:48,464 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [70751564] [2020-04-18 07:31:48,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:48,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:31:48,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [70751564] [2020-04-18 07:31:48,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 07:31:48,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:48,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,466 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 6 states. [2020-04-18 07:31:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,514 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-04-18 07:31:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 07:31:48,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 07:31:48,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:48,515 INFO L225 Difference]: With dead ends: 83 [2020-04-18 07:31:48,516 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 07:31:48,516 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 07:31:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-04-18 07:31:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 07:31:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-18 07:31:48,526 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-18 07:31:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:48,526 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-18 07:31:48,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 07:31:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-18 07:31:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,527 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:48,527 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:48,528 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 4 times [2020-04-18 07:31:48,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:48,529 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1724129775] [2020-04-18 07:31:48,529 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,530 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 07:31:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 07:31:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,531 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1295455160, now seen corresponding path program 5 times [2020-04-18 07:31:48,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922816873] [2020-04-18 07:31:48,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:48,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922816873] [2020-04-18 07:31:48,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:48,588 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,589 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,590 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:48,590 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,622 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 07:31:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:48,623 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-04-18 07:31:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,667 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2020-04-18 07:31:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2020-04-18 07:31:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,668 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1294792070, now seen corresponding path program 6 times [2020-04-18 07:31:48,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150215498] [2020-04-18 07:31:48,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150215498] [2020-04-18 07:31:48,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199508821] [2020-04-18 07:31:48,750 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:48,821 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:48,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:48,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 07:31:48,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:48,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:48,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-04-18 07:31:48,887 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,888 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,890 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2020-04-18 07:31:48,890 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,971 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:31:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:48,972 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2020-04-18 07:31:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,045 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 07:31:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 07:31:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:49,046 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 7 times [2020-04-18 07:31:49,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:49,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779945003] [2020-04-18 07:31:49,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779945003] [2020-04-18 07:31:49,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959649673] [2020-04-18 07:31:49,163 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:49,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:31:49,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:49,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:49,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-18 07:31:49,265 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:49,265 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,267 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:49,267 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:49,302 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:49,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:31:49,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:31:49,305 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 10 states. [2020-04-18 07:31:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,366 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 07:31:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 07:31:49,367 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:49,368 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1724129775] [2020-04-18 07:31:49,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:49,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:49,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1724129775] [2020-04-18 07:31:49,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:31:49,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:49,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:31:49,370 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 12 states. [2020-04-18 07:31:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,602 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-18 07:31:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:31:49,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 07:31:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:49,609 INFO L225 Difference]: With dead ends: 101 [2020-04-18 07:31:49,609 INFO L226 Difference]: Without dead ends: 96 [2020-04-18 07:31:49,610 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:31:49,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-18 07:31:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-18 07:31:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 07:31:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-18 07:31:49,622 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-18 07:31:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:49,622 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-18 07:31:49,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:31:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-18 07:31:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:49,624 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:49,624 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:50,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:50,036 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-18 07:31:50,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:50,038 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1578410962] [2020-04-18 07:31:50,039 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,040 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 07:31:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:50,041 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 4 times [2020-04-18 07:31:50,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279805570] [2020-04-18 07:31:50,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279805570] [2020-04-18 07:31:50,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409757779] [2020-04-18 07:31:50,118 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:50,175 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:50,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:50,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:31:50,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:50,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-18 07:31:50,258 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,258 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,260 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-04-18 07:31:50,260 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:50,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:50,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,407 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:50,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:50,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:31:50,423 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 12 states. [2020-04-18 07:31:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,492 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2020-04-18 07:31:50,492 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-04-18 07:31:50,492 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:50,493 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1578410962] [2020-04-18 07:31:50,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:50,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:50,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1578410962] [2020-04-18 07:31:50,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:31:50,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:50,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:50,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:50,495 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 12 states. [2020-04-18 07:31:50,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,553 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-04-18 07:31:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 07:31:50,554 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 07:31:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:50,555 INFO L225 Difference]: With dead ends: 104 [2020-04-18 07:31:50,555 INFO L226 Difference]: Without dead ends: 98 [2020-04-18 07:31:50,555 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-18 07:31:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-04-18 07:31:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 07:31:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-18 07:31:50,564 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 9 [2020-04-18 07:31:50,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:50,564 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-18 07:31:50,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:31:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-18 07:31:50,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,566 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:50,566 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:50,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:50,770 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-18 07:31:50,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:50,771 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [176816284] [2020-04-18 07:31:50,772 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,772 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 07:31:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 07:31:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,773 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 2 times [2020-04-18 07:31:50,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528172323] [2020-04-18 07:31:50,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528172323] [2020-04-18 07:31:50,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:50,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:50,862 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,863 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,865 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-04-18 07:31:50,865 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,898 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:50,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:50,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:50,899 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-04-18 07:31:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,952 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2020-04-18 07:31:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 79 transitions. [2020-04-18 07:31:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,953 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 3 times [2020-04-18 07:31:50,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343673876] [2020-04-18 07:31:50,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343673876] [2020-04-18 07:31:51,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:51,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:51,025 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,026 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,028 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:51,028 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,063 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:51,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:31:51,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:51,064 INFO L87 Difference]: Start difference. First operand 45 states and 79 transitions. Second operand 7 states. [2020-04-18 07:31:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,136 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2020-04-18 07:31:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 83 transitions. [2020-04-18 07:31:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,136 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:51,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-18 07:31:51,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:51,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740143252] [2020-04-18 07:31:51,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740143252] [2020-04-18 07:31:51,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:51,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:51,215 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,216 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,218 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 07:31:51,219 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,252 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 07:31:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:31:51,253 INFO L87 Difference]: Start difference. First operand 50 states and 83 transitions. Second operand 6 states. [2020-04-18 07:31:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,325 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2020-04-18 07:31:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2020-04-18 07:31:51,326 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:51,326 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [176816284] [2020-04-18 07:31:51,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:51,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:51,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [176816284] [2020-04-18 07:31:51,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 07:31:51,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:51,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:51,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:31:51,328 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 11 states. [2020-04-18 07:31:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,421 INFO L93 Difference]: Finished difference Result 124 states and 288 transitions. [2020-04-18 07:31:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 07:31:51,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-18 07:31:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:51,424 INFO L225 Difference]: With dead ends: 124 [2020-04-18 07:31:51,424 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 07:31:51,425 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:31:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 07:31:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-04-18 07:31:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-18 07:31:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 210 transitions. [2020-04-18 07:31:51,434 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 210 transitions. Word has length 10 [2020-04-18 07:31:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:51,435 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 210 transitions. [2020-04-18 07:31:51,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 07:31:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 210 transitions. [2020-04-18 07:31:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,436 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:51,436 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:51,436 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 5 times [2020-04-18 07:31:51,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:51,437 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [5844314] [2020-04-18 07:31:51,438 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,438 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 07:31:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,439 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:51,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-18 07:31:51,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:51,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043599195] [2020-04-18 07:31:51,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043599195] [2020-04-18 07:31:51,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803633483] [2020-04-18 07:31:51,532 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:51,589 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:51,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:51,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:51,593 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:51,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:51,715 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,716 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,718 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 07:31:51,718 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:51,998 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:52,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:52,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:52,063 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:31:52,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:52,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:31:52,065 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 16 states. [2020-04-18 07:31:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,229 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-04-18 07:31:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-04-18 07:31:52,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:52,230 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [5844314] [2020-04-18 07:31:52,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:52,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:52,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [5844314] [2020-04-18 07:31:52,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 07:31:52,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:52,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:52,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:52,232 INFO L87 Difference]: Start difference. First operand 87 states and 210 transitions. Second operand 16 states. [2020-04-18 07:31:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,318 INFO L93 Difference]: Finished difference Result 122 states and 292 transitions. [2020-04-18 07:31:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 07:31:52,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-04-18 07:31:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:52,320 INFO L225 Difference]: With dead ends: 122 [2020-04-18 07:31:52,320 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 07:31:52,321 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 07:31:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-04-18 07:31:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-18 07:31:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-04-18 07:31:52,329 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 10 [2020-04-18 07:31:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:52,329 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-04-18 07:31:52,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 07:31:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-04-18 07:31:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,330 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:52,330 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:52,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,537 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-18 07:31:52,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:52,539 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [314710821] [2020-04-18 07:31:52,540 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,540 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 91 transitions. [2020-04-18 07:31:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 07:31:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,542 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 6 times [2020-04-18 07:31:52,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:52,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768093935] [2020-04-18 07:31:52,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768093935] [2020-04-18 07:31:52,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827814298] [2020-04-18 07:31:52,619 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,671 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:52,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:52,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:52,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:52,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:52,781 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:52,782 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,784 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 28 transitions. [2020-04-18 07:31:52,784 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:52,881 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:52,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:52,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:52,882 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 11 states. [2020-04-18 07:31:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,998 INFO L93 Difference]: Finished difference Result 62 states and 117 transitions. [2020-04-18 07:31:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 117 transitions. [2020-04-18 07:31:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,999 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 7 times [2020-04-18 07:31:53,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608479628] [2020-04-18 07:31:53,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608479628] [2020-04-18 07:31:53,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663313004] [2020-04-18 07:31:53,078 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:53,226 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,227 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,229 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 07:31:53,229 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,268 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:31:53,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:53,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:53,268 INFO L87 Difference]: Start difference. First operand 62 states and 117 transitions. Second operand 11 states. [2020-04-18 07:31:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:53,391 INFO L93 Difference]: Finished difference Result 70 states and 127 transitions. [2020-04-18 07:31:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 127 transitions. [2020-04-18 07:31:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:53,392 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 8 times [2020-04-18 07:31:53,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95350958] [2020-04-18 07:31:53,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95350958] [2020-04-18 07:31:53,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857049120] [2020-04-18 07:31:53,468 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:53,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:53,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-18 07:31:53,550 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,551 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,555 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:31:53,555 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,638 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:53,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:31:53,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:31:53,639 INFO L87 Difference]: Start difference. First operand 70 states and 127 transitions. Second operand 9 states. [2020-04-18 07:31:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:53,775 INFO L93 Difference]: Finished difference Result 81 states and 141 transitions. [2020-04-18 07:31:53,776 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-04-18 07:31:53,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:53,776 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:31:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 9 times [2020-04-18 07:31:53,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170008683] [2020-04-18 07:31:53,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170008683] [2020-04-18 07:31:53,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523094951] [2020-04-18 07:31:53,840 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,885 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:31:53,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:53,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:53,944 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,945 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,947 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-04-18 07:31:53,947 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:54,043 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:31:54,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:54,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:31:54,044 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 11 states. [2020-04-18 07:31:54,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:54,348 INFO L93 Difference]: Finished difference Result 90 states and 146 transitions. [2020-04-18 07:31:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 146 transitions. [2020-04-18 07:31:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:54,349 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:31:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 10 times [2020-04-18 07:31:54,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:54,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847833420] [2020-04-18 07:31:54,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:54,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847833420] [2020-04-18 07:31:54,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244288711] [2020-04-18 07:31:54,422 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:54,484 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:54,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:54,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:54,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:54,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:54,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:54,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:54,568 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:54,569 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:54,570 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-04-18 07:31:54,571 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:54,712 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:54,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:54,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:31:54,713 INFO L87 Difference]: Start difference. First operand 90 states and 146 transitions. Second operand 11 states. [2020-04-18 07:31:54,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:54,967 INFO L93 Difference]: Finished difference Result 97 states and 149 transitions. [2020-04-18 07:31:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 149 transitions. [2020-04-18 07:31:54,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:54,968 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [314710821] [2020-04-18 07:31:54,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:54,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:54,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [314710821] [2020-04-18 07:31:54,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 07:31:54,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:54,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:31:54,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1184, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 07:31:54,970 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 28 states. [2020-04-18 07:31:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:55,419 INFO L93 Difference]: Finished difference Result 217 states and 499 transitions. [2020-04-18 07:31:55,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 07:31:55,420 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 11 [2020-04-18 07:31:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:55,421 INFO L225 Difference]: With dead ends: 217 [2020-04-18 07:31:55,421 INFO L226 Difference]: Without dead ends: 198 [2020-04-18 07:31:55,422 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1573, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 07:31:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-18 07:31:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 107. [2020-04-18 07:31:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-04-18 07:31:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 271 transitions. [2020-04-18 07:31:55,430 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 271 transitions. Word has length 11 [2020-04-18 07:31:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:55,431 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 271 transitions. [2020-04-18 07:31:55,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 07:31:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 271 transitions. [2020-04-18 07:31:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:55,432 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:55,432 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:56,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,446 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 11 times [2020-04-18 07:31:56,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:56,447 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [683376233] [2020-04-18 07:31:56,448 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,449 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 07:31:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:31:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:56,450 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 12 times [2020-04-18 07:31:56,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:56,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189455032] [2020-04-18 07:31:56,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189455032] [2020-04-18 07:31:56,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656805123] [2020-04-18 07:31:56,514 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,566 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:56,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:56,567 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:56,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:56,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:56,640 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:56,641 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,643 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:56,643 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:56,729 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:31:56,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:56,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:56,729 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2020-04-18 07:31:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:56,873 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2020-04-18 07:31:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 07:31:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:56,874 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 13 times [2020-04-18 07:31:56,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:56,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252014564] [2020-04-18 07:31:56,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252014564] [2020-04-18 07:31:56,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774242983] [2020-04-18 07:31:56,955 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:57,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:57,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:57,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:57,077 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:57,077 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:57,079 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 07:31:57,080 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:57,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,202 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:31:57,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:31:57,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:57,204 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 13 states. [2020-04-18 07:31:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:57,431 INFO L93 Difference]: Finished difference Result 71 states and 126 transitions. [2020-04-18 07:31:57,432 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2020-04-18 07:31:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:57,433 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 14 times [2020-04-18 07:31:57,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:57,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352374697] [2020-04-18 07:31:57,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:57,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352374697] [2020-04-18 07:31:57,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651581330] [2020-04-18 07:31:57,501 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:57,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:57,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:57,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:57,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:57,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:57,611 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:57,612 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:57,613 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:31:57,613 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:57,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,744 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:31:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:31:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:31:57,745 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 14 states. [2020-04-18 07:31:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:57,971 INFO L93 Difference]: Finished difference Result 79 states and 134 transitions. [2020-04-18 07:31:57,971 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 134 transitions. [2020-04-18 07:31:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:57,971 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:31:57,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:57,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 15 times [2020-04-18 07:31:57,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:57,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860929647] [2020-04-18 07:31:57,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:58,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860929647] [2020-04-18 07:31:58,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203167477] [2020-04-18 07:31:58,074 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:58,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:31:58,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:58,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:58,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:58,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:58,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:58,243 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:58,245 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:58,247 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:31:58,247 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:58,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:58,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:58,305 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:58,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:31:58,306 INFO L87 Difference]: Start difference. First operand 79 states and 134 transitions. Second operand 12 states. [2020-04-18 07:31:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:58,542 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2020-04-18 07:31:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2020-04-18 07:31:58,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:58,544 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [683376233] [2020-04-18 07:31:58,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:58,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:58,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [683376233] [2020-04-18 07:31:58,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 07:31:58,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:58,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 07:31:58,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:31:58,546 INFO L87 Difference]: Start difference. First operand 107 states and 271 transitions. Second operand 23 states. [2020-04-18 07:31:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:58,703 INFO L93 Difference]: Finished difference Result 153 states and 367 transitions. [2020-04-18 07:31:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:31:58,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 11 [2020-04-18 07:31:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:58,706 INFO L225 Difference]: With dead ends: 153 [2020-04-18 07:31:58,706 INFO L226 Difference]: Without dead ends: 148 [2020-04-18 07:31:58,707 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:31:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-18 07:31:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2020-04-18 07:31:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-18 07:31:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2020-04-18 07:31:58,713 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 11 [2020-04-18 07:31:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:58,713 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2020-04-18 07:31:58,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 07:31:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2020-04-18 07:31:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:58,714 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:58,714 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:59,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:59,519 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 7 times [2020-04-18 07:31:59,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:59,520 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1598805186] [2020-04-18 07:31:59,521 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:59,522 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 07:31:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 07:31:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:59,523 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:59,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 8 times [2020-04-18 07:31:59,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:59,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858713255] [2020-04-18 07:31:59,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:59,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858713255] [2020-04-18 07:31:59,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177918123] [2020-04-18 07:31:59,647 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:59,694 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:59,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:59,694 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:31:59,695 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:59,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:59,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:31:59,779 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:59,780 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:59,781 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:31:59,781 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:59,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,902 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:00,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:00,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:00,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:00,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:00,053 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 07:32:00,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:32:00,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:00,054 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 20 states. [2020-04-18 07:32:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:00,257 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2020-04-18 07:32:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2020-04-18 07:32:00,258 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:00,258 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1598805186] [2020-04-18 07:32:00,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:00,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:00,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1598805186] [2020-04-18 07:32:00,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 07:32:00,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:32:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:32:00,260 INFO L87 Difference]: Start difference. First operand 110 states and 273 transitions. Second operand 20 states. [2020-04-18 07:32:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:00,350 INFO L93 Difference]: Finished difference Result 158 states and 382 transitions. [2020-04-18 07:32:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 07:32:00,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 11 [2020-04-18 07:32:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:00,351 INFO L225 Difference]: With dead ends: 158 [2020-04-18 07:32:00,351 INFO L226 Difference]: Without dead ends: 152 [2020-04-18 07:32:00,352 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:32:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-04-18 07:32:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2020-04-18 07:32:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-18 07:32:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-04-18 07:32:00,359 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 11 [2020-04-18 07:32:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:00,360 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-04-18 07:32:00,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 07:32:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-04-18 07:32:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:00,361 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:00,361 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:00,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,570 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:00,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 16 times [2020-04-18 07:32:00,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:00,571 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [439369101] [2020-04-18 07:32:00,572 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:00,573 INFO L259 McrAutomatonBuilder]: Finished intersection with 57 states and 116 transitions. [2020-04-18 07:32:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-04-18 07:32:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:00,574 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 17 times [2020-04-18 07:32:00,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:00,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741422146] [2020-04-18 07:32:00,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741422146] [2020-04-18 07:32:00,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999283140] [2020-04-18 07:32:00,662 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,710 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:00,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:00,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:00,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:00,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:00,807 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:00,808 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:00,810 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 07:32:00,810 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:00,953 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:00,956 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 13 states. [2020-04-18 07:32:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:01,118 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2020-04-18 07:32:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2020-04-18 07:32:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:01,119 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:01,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 18 times [2020-04-18 07:32:01,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:01,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261242673] [2020-04-18 07:32:01,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261242673] [2020-04-18 07:32:01,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063366173] [2020-04-18 07:32:01,218 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:01,272 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:01,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:01,273 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:01,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:01,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:01,385 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:01,385 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:01,387 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:01,388 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:01,443 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:01,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:01,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:01,443 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand 13 states. [2020-04-18 07:32:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:01,634 INFO L93 Difference]: Finished difference Result 93 states and 178 transitions. [2020-04-18 07:32:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 178 transitions. [2020-04-18 07:32:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:01,635 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:01,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 19 times [2020-04-18 07:32:01,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:01,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840996826] [2020-04-18 07:32:01,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840996826] [2020-04-18 07:32:01,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174076605] [2020-04-18 07:32:01,729 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:01,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:01,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:01,869 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:01,870 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:01,872 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 07:32:01,872 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:01,922 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:01,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:01,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:32:01,923 INFO L87 Difference]: Start difference. First operand 93 states and 178 transitions. Second operand 13 states. [2020-04-18 07:32:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:02,152 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2020-04-18 07:32:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 188 transitions. [2020-04-18 07:32:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:02,171 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 20 times [2020-04-18 07:32:02,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:02,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123921925] [2020-04-18 07:32:02,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123921925] [2020-04-18 07:32:02,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903345642] [2020-04-18 07:32:02,260 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:02,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:02,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:02,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:32:02,322 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:02,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-18 07:32:02,363 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:02,363 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:02,366 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 40 transitions. [2020-04-18 07:32:02,367 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:02,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:02,435 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:32:02,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:32:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:02,436 INFO L87 Difference]: Start difference. First operand 101 states and 188 transitions. Second operand 10 states. [2020-04-18 07:32:02,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:02,637 INFO L93 Difference]: Finished difference Result 119 states and 214 transitions. [2020-04-18 07:32:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 214 transitions. [2020-04-18 07:32:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:02,638 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:02,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 21 times [2020-04-18 07:32:02,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:02,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781062999] [2020-04-18 07:32:02,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781062999] [2020-04-18 07:32:02,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376913004] [2020-04-18 07:32:02,702 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:02,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:32:02,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:02,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:02,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:02,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:02,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:02,862 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:02,863 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:02,865 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:02,865 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:03,012 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:03,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:32:03,013 INFO L87 Difference]: Start difference. First operand 119 states and 214 transitions. Second operand 13 states. [2020-04-18 07:32:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:03,640 INFO L93 Difference]: Finished difference Result 136 states and 231 transitions. [2020-04-18 07:32:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 231 transitions. [2020-04-18 07:32:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:03,641 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 22 times [2020-04-18 07:32:03,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:03,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420040196] [2020-04-18 07:32:03,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:03,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420040196] [2020-04-18 07:32:03,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818800226] [2020-04-18 07:32:03,717 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:03,765 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:03,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:03,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:03,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:03,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:03,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:03,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:03,844 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:03,845 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:03,847 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 07:32:03,847 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:04,022 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:04,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:04,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1222, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:32:04,025 INFO L87 Difference]: Start difference. First operand 136 states and 231 transitions. Second operand 13 states. [2020-04-18 07:32:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:04,550 INFO L93 Difference]: Finished difference Result 152 states and 241 transitions. [2020-04-18 07:32:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 241 transitions. [2020-04-18 07:32:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:04,551 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:04,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 23 times [2020-04-18 07:32:04,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:04,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577493800] [2020-04-18 07:32:04,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:04,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577493800] [2020-04-18 07:32:04,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416632779] [2020-04-18 07:32:04,630 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:04,671 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:04,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:04,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:04,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:04,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:04,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:04,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:04,767 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:04,768 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:04,770 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:04,770 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:05,006 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:05,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:05,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:05,008 INFO L87 Difference]: Start difference. First operand 152 states and 241 transitions. Second operand 13 states. [2020-04-18 07:32:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:05,402 INFO L93 Difference]: Finished difference Result 164 states and 248 transitions. [2020-04-18 07:32:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2020-04-18 07:32:05,402 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:05,403 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [439369101] [2020-04-18 07:32:05,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:05,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:05,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [439369101] [2020-04-18 07:32:05,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 07:32:05,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:05,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 07:32:05,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=3294, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 07:32:05,405 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand 41 states. [2020-04-18 07:32:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:06,269 INFO L93 Difference]: Finished difference Result 287 states and 662 transitions. [2020-04-18 07:32:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-18 07:32:06,270 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 12 [2020-04-18 07:32:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:06,272 INFO L225 Difference]: With dead ends: 287 [2020-04-18 07:32:06,273 INFO L226 Difference]: Without dead ends: 268 [2020-04-18 07:32:06,275 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 192 SyntacticMatches, 25 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1498, Invalid=4508, Unknown=0, NotChecked=0, Total=6006 [2020-04-18 07:32:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-18 07:32:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 131. [2020-04-18 07:32:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-04-18 07:32:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-04-18 07:32:06,282 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 12 [2020-04-18 07:32:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:06,282 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-04-18 07:32:06,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 07:32:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-04-18 07:32:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:06,283 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:06,283 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:07,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:07,689 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 24 times [2020-04-18 07:32:07,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:07,690 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1676290550] [2020-04-18 07:32:07,691 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:07,691 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 07:32:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 07:32:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:07,692 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 25 times [2020-04-18 07:32:07,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:07,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371415202] [2020-04-18 07:32:07,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:07,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371415202] [2020-04-18 07:32:07,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804143877] [2020-04-18 07:32:07,755 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:07,802 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:07,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:07,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:07,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:07,912 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:07,913 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:07,915 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:32:07,915 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:08,015 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:32:08,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:08,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:08,016 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 13 states. [2020-04-18 07:32:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:08,217 INFO L93 Difference]: Finished difference Result 84 states and 169 transitions. [2020-04-18 07:32:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2020-04-18 07:32:08,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:08,218 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 26 times [2020-04-18 07:32:08,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:08,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127343874] [2020-04-18 07:32:08,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127343874] [2020-04-18 07:32:08,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376446084] [2020-04-18 07:32:08,287 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:08,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:08,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:08,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:08,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:08,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:08,421 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:08,422 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:08,424 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 07:32:08,424 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:08,489 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:08,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:08,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:08,490 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand 13 states. [2020-04-18 07:32:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:08,772 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2020-04-18 07:32:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2020-04-18 07:32:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:08,773 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 27 times [2020-04-18 07:32:08,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:08,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352499333] [2020-04-18 07:32:08,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352499333] [2020-04-18 07:32:08,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75111507] [2020-04-18 07:32:08,864 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:08,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:08,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:08,915 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:08,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:08,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:08,992 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:08,993 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:08,995 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 32 transitions. [2020-04-18 07:32:08,995 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:09,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:09,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:09,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:09,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:09,154 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:09,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:32:09,156 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand 15 states. [2020-04-18 07:32:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:09,586 INFO L93 Difference]: Finished difference Result 110 states and 201 transitions. [2020-04-18 07:32:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 201 transitions. [2020-04-18 07:32:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:09,587 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:09,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 28 times [2020-04-18 07:32:09,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:09,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714042978] [2020-04-18 07:32:09,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714042978] [2020-04-18 07:32:09,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000655820] [2020-04-18 07:32:09,675 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:09,717 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:09,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:09,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:09,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:09,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:09,796 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:09,797 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:09,799 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:09,799 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:09,842 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:09,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:09,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:32:09,843 INFO L87 Difference]: Start difference. First operand 110 states and 201 transitions. Second operand 13 states. [2020-04-18 07:32:10,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:10,081 INFO L93 Difference]: Finished difference Result 123 states and 221 transitions. [2020-04-18 07:32:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 221 transitions. [2020-04-18 07:32:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:10,082 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:10,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:10,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 29 times [2020-04-18 07:32:10,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:10,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68840693] [2020-04-18 07:32:10,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68840693] [2020-04-18 07:32:10,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213364932] [2020-04-18 07:32:10,163 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:10,204 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:10,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:10,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:10,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:10,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:10,304 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:10,305 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:10,306 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:10,307 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:10,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,374 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 07:32:10,376 INFO L87 Difference]: Start difference. First operand 123 states and 221 transitions. Second operand 15 states. [2020-04-18 07:32:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:10,840 INFO L93 Difference]: Finished difference Result 137 states and 239 transitions. [2020-04-18 07:32:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 239 transitions. [2020-04-18 07:32:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:10,841 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:10,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 30 times [2020-04-18 07:32:10,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:10,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179942093] [2020-04-18 07:32:10,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179942093] [2020-04-18 07:32:10,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008176035] [2020-04-18 07:32:10,967 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:11,008 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:11,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:11,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:11,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:11,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:11,112 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:11,112 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:11,114 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:32:11,114 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:11,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:11,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,241 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 17 times. [2020-04-18 07:32:11,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:11,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 07:32:11,242 INFO L87 Difference]: Start difference. First operand 137 states and 239 transitions. Second operand 16 states. [2020-04-18 07:32:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:11,642 INFO L93 Difference]: Finished difference Result 156 states and 263 transitions. [2020-04-18 07:32:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 263 transitions. [2020-04-18 07:32:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:11,643 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:11,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:11,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 31 times [2020-04-18 07:32:11,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:11,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853044924] [2020-04-18 07:32:11,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853044924] [2020-04-18 07:32:11,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231117089] [2020-04-18 07:32:11,800 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:11,851 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:11,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:11,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:11,928 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:11,929 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:11,930 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 07:32:11,930 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:11,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:12,027 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:32:12,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:32:12,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=1956, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 07:32:12,029 INFO L87 Difference]: Start difference. First operand 156 states and 263 transitions. Second operand 14 states. [2020-04-18 07:32:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:12,571 INFO L93 Difference]: Finished difference Result 161 states and 267 transitions. [2020-04-18 07:32:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2020-04-18 07:32:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:12,572 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:32:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 32 times [2020-04-18 07:32:12,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:12,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818468229] [2020-04-18 07:32:12,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:12,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818468229] [2020-04-18 07:32:12,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815424392] [2020-04-18 07:32:12,658 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:12,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:12,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:12,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:12,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:12,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:12,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:12,848 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:12,850 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:12,852 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:12,852 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:12,935 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:12,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:12,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=2621, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:12,937 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand 13 states. [2020-04-18 07:32:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:13,319 INFO L93 Difference]: Finished difference Result 173 states and 276 transitions. [2020-04-18 07:32:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 276 transitions. [2020-04-18 07:32:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:13,320 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:32:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 33 times [2020-04-18 07:32:13,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:13,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552570798] [2020-04-18 07:32:13,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:13,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552570798] [2020-04-18 07:32:13,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396963412] [2020-04-18 07:32:13,402 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:13,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:13,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:13,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-18 07:32:13,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:13,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:13,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-04-18 07:32:13,507 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:13,508 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:13,509 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-04-18 07:32:13,510 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:13,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:13,666 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:32:13,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:13,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=3549, Unknown=0, NotChecked=0, Total=4692 [2020-04-18 07:32:13,669 INFO L87 Difference]: Start difference. First operand 173 states and 276 transitions. Second operand 13 states. [2020-04-18 07:32:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:14,272 INFO L93 Difference]: Finished difference Result 184 states and 285 transitions. [2020-04-18 07:32:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 285 transitions. [2020-04-18 07:32:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:14,273 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:32:14,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:14,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 34 times [2020-04-18 07:32:14,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:14,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410228685] [2020-04-18 07:32:14,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:14,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410228685] [2020-04-18 07:32:14,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457561996] [2020-04-18 07:32:14,333 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:14,373 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:14,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:14,374 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:14,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:14,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:14,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:14,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:14,435 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:14,436 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:14,438 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:14,438 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:14,608 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:14,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:14,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4841, Unknown=0, NotChecked=0, Total=6480 [2020-04-18 07:32:14,611 INFO L87 Difference]: Start difference. First operand 184 states and 285 transitions. Second operand 13 states. [2020-04-18 07:32:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:15,181 INFO L93 Difference]: Finished difference Result 193 states and 289 transitions. [2020-04-18 07:32:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2020-04-18 07:32:15,182 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:15,182 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1676290550] [2020-04-18 07:32:15,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:15,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:15,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1676290550] [2020-04-18 07:32:15,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-04-18 07:32:15,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-04-18 07:32:15,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1970, Invalid=6040, Unknown=0, NotChecked=0, Total=8010 [2020-04-18 07:32:15,187 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 52 states. [2020-04-18 07:32:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:16,312 INFO L93 Difference]: Finished difference Result 283 states and 666 transitions. [2020-04-18 07:32:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 07:32:16,312 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 12 [2020-04-18 07:32:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:16,314 INFO L225 Difference]: With dead ends: 283 [2020-04-18 07:32:16,314 INFO L226 Difference]: Without dead ends: 263 [2020-04-18 07:32:16,315 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 258 SyntacticMatches, 24 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5388 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2791, Invalid=8551, Unknown=0, NotChecked=0, Total=11342 [2020-04-18 07:32:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-18 07:32:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 136. [2020-04-18 07:32:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-18 07:32:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2020-04-18 07:32:16,321 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 12 [2020-04-18 07:32:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:16,321 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2020-04-18 07:32:16,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-04-18 07:32:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2020-04-18 07:32:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:16,322 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:16,322 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:18,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:18,328 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:18,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 9 times [2020-04-18 07:32:18,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:18,330 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2136223934] [2020-04-18 07:32:18,330 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:18,330 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:32:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 07:32:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:18,331 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:18,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 10 times [2020-04-18 07:32:18,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:18,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686379593] [2020-04-18 07:32:18,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:18,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686379593] [2020-04-18 07:32:18,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558098129] [2020-04-18 07:32:18,448 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:18,495 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:18,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:18,496 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:18,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:18,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:18,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:18,619 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:18,620 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:18,621 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 07:32:18,621 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:18,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,986 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:32:18,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:32:18,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:32:18,987 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 24 states. [2020-04-18 07:32:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:19,230 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2020-04-18 07:32:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-04-18 07:32:19,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:19,231 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2136223934] [2020-04-18 07:32:19,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:19,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:32:19,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2136223934] [2020-04-18 07:32:19,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 07:32:19,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:19,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:32:19,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:32:19,233 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand 24 states. [2020-04-18 07:32:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:19,361 INFO L93 Difference]: Finished difference Result 199 states and 487 transitions. [2020-04-18 07:32:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 07:32:19,362 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2020-04-18 07:32:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:19,364 INFO L225 Difference]: With dead ends: 199 [2020-04-18 07:32:19,364 INFO L226 Difference]: Without dead ends: 193 [2020-04-18 07:32:19,365 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:32:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-18 07:32:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2020-04-18 07:32:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-18 07:32:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 374 transitions. [2020-04-18 07:32:19,371 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 374 transitions. Word has length 12 [2020-04-18 07:32:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:19,371 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 374 transitions. [2020-04-18 07:32:19,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 07:32:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 374 transitions. [2020-04-18 07:32:19,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:19,372 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:19,372 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:19,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:19,576 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 35 times [2020-04-18 07:32:19,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:19,577 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1290100799] [2020-04-18 07:32:19,578 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:19,579 INFO L259 McrAutomatonBuilder]: Finished intersection with 72 states and 153 transitions. [2020-04-18 07:32:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-04-18 07:32:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:19,581 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 36 times [2020-04-18 07:32:19,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:19,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353321428] [2020-04-18 07:32:19,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:19,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353321428] [2020-04-18 07:32:19,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559197259] [2020-04-18 07:32:19,669 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:19,713 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:19,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:19,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:19,715 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:19,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:19,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:19,815 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:19,816 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:19,817 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 32 transitions. [2020-04-18 07:32:19,817 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:19,953 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:19,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:19,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:19,954 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 15 states. [2020-04-18 07:32:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:20,239 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2020-04-18 07:32:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 223 transitions. [2020-04-18 07:32:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:20,240 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:20,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 37 times [2020-04-18 07:32:20,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:20,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71369190] [2020-04-18 07:32:20,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:20,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71369190] [2020-04-18 07:32:20,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356065885] [2020-04-18 07:32:20,350 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:20,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:20,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:24,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:24,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:24,599 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:24,599 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:24,601 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:24,601 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:24,699 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:32:24,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:24,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-04-18 07:32:24,700 INFO L87 Difference]: Start difference. First operand 107 states and 223 transitions. Second operand 15 states. [2020-04-18 07:32:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:25,087 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2020-04-18 07:32:25,087 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 240 transitions. [2020-04-18 07:32:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:25,088 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:25,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 38 times [2020-04-18 07:32:25,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:25,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391850888] [2020-04-18 07:32:25,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:25,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391850888] [2020-04-18 07:32:25,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374197939] [2020-04-18 07:32:25,187 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:25,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:25,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:25,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:25,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:25,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:25,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:25,348 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:25,349 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:25,351 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:25,352 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:25,461 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:32:25,462 INFO L87 Difference]: Start difference. First operand 119 states and 240 transitions. Second operand 15 states. [2020-04-18 07:32:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:25,867 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 07:32:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 07:32:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:25,868 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 39 times [2020-04-18 07:32:25,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:25,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509126013] [2020-04-18 07:32:25,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:25,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509126013] [2020-04-18 07:32:25,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413630549] [2020-04-18 07:32:25,970 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:26,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:26,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:26,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:26,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:26,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:26,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:26,119 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:26,120 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:26,121 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:32:26,121 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:26,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:26,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:26,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:26,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:26,350 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:26,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:26,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 07:32:26,351 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 07:32:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:26,922 INFO L93 Difference]: Finished difference Result 151 states and 280 transitions. [2020-04-18 07:32:26,922 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 280 transitions. [2020-04-18 07:32:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:26,922 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:26,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:26,923 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 40 times [2020-04-18 07:32:26,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:26,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123513041] [2020-04-18 07:32:26,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:27,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123513041] [2020-04-18 07:32:27,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693587648] [2020-04-18 07:32:27,055 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:27,112 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:27,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:27,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:27,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:27,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:27,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:27,242 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:27,243 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:27,246 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:32:27,246 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:27,308 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 07:32:27,309 INFO L87 Difference]: Start difference. First operand 151 states and 280 transitions. Second operand 15 states. [2020-04-18 07:32:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:27,612 INFO L93 Difference]: Finished difference Result 173 states and 321 transitions. [2020-04-18 07:32:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 321 transitions. [2020-04-18 07:32:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:27,613 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:27,614 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 41 times [2020-04-18 07:32:27,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:27,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393352315] [2020-04-18 07:32:27,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:27,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393352315] [2020-04-18 07:32:27,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348826630] [2020-04-18 07:32:27,726 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:27,769 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:27,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:27,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:27,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:27,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:27,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:27,897 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:27,897 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:27,899 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:32:27,899 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:27,943 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:27,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:27,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 07:32:27,944 INFO L87 Difference]: Start difference. First operand 173 states and 321 transitions. Second operand 15 states. [2020-04-18 07:32:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:28,330 INFO L93 Difference]: Finished difference Result 181 states and 330 transitions. [2020-04-18 07:32:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 330 transitions. [2020-04-18 07:32:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:28,331 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 42 times [2020-04-18 07:32:28,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:28,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218846338] [2020-04-18 07:32:28,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218846338] [2020-04-18 07:32:28,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576914706] [2020-04-18 07:32:28,445 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:28,493 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:28,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:28,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:28,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:28,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:28,597 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:28,598 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:28,600 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:32:28,601 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:28,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:28,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:28,643 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:28,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:28,667 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:28,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:28,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=1964, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 07:32:28,669 INFO L87 Difference]: Start difference. First operand 181 states and 330 transitions. Second operand 17 states. [2020-04-18 07:32:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:29,414 INFO L93 Difference]: Finished difference Result 204 states and 364 transitions. [2020-04-18 07:32:29,414 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 364 transitions. [2020-04-18 07:32:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:29,415 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:32:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 43 times [2020-04-18 07:32:29,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:29,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653887961] [2020-04-18 07:32:29,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:29,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653887961] [2020-04-18 07:32:29,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274334398] [2020-04-18 07:32:29,537 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:29,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:29,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:29,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:29,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:29,683 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:29,684 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:29,686 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:32:29,686 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:29,753 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:29,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:29,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=2498, Unknown=0, NotChecked=0, Total=3306 [2020-04-18 07:32:29,755 INFO L87 Difference]: Start difference. First operand 204 states and 364 transitions. Second operand 15 states. [2020-04-18 07:32:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:30,098 INFO L93 Difference]: Finished difference Result 213 states and 378 transitions. [2020-04-18 07:32:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 378 transitions. [2020-04-18 07:32:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:30,099 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:32:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 44 times [2020-04-18 07:32:30,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:30,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784070081] [2020-04-18 07:32:30,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:30,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784070081] [2020-04-18 07:32:30,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143339705] [2020-04-18 07:32:30,199 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:30,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:30,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:30,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:30,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:32,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:32,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:32,393 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:32,394 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:32,396 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:32:32,396 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:32,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:32,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:32,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:32,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:32,497 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:32,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:32,498 INFO L87 Difference]: Start difference. First operand 213 states and 378 transitions. Second operand 17 states. [2020-04-18 07:32:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:33,156 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2020-04-18 07:32:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 400 transitions. [2020-04-18 07:32:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:33,157 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:32:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 45 times [2020-04-18 07:32:33,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:33,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39676155] [2020-04-18 07:32:33,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:33,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39676155] [2020-04-18 07:32:33,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400413473] [2020-04-18 07:32:33,270 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:33,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:32:33,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:33,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:33,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:33,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:33,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:33,419 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:33,419 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:33,422 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 43 transitions. [2020-04-18 07:32:33,422 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:33,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:33,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:33,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:33,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:33,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:33,611 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 07:32:33,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:32:33,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 07:32:33,612 INFO L87 Difference]: Start difference. First operand 231 states and 400 transitions. Second operand 18 states. [2020-04-18 07:32:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:34,170 INFO L93 Difference]: Finished difference Result 265 states and 451 transitions. [2020-04-18 07:32:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 451 transitions. [2020-04-18 07:32:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:34,171 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:32:34,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:34,172 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 46 times [2020-04-18 07:32:34,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:34,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032663565] [2020-04-18 07:32:34,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:34,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032663565] [2020-04-18 07:32:34,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750427367] [2020-04-18 07:32:34,263 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:34,309 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:34,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:34,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:34,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:39,503 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 07:32:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:39,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:39,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-18 07:32:39,507 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:39,507 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:39,510 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 07:32:39,510 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:39,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:47,424 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 07:32:47,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:47,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1325, Invalid=4077, Unknown=0, NotChecked=0, Total=5402 [2020-04-18 07:32:47,425 INFO L87 Difference]: Start difference. First operand 265 states and 451 transitions. Second operand 16 states. [2020-04-18 07:32:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:48,335 INFO L93 Difference]: Finished difference Result 283 states and 476 transitions. [2020-04-18 07:32:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 476 transitions. [2020-04-18 07:32:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:48,337 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:32:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 47 times [2020-04-18 07:32:48,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:48,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281640614] [2020-04-18 07:32:48,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:48,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281640614] [2020-04-18 07:32:48,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120066939] [2020-04-18 07:32:48,420 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 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 [2020-04-18 07:32:48,480 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:48,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:48,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:48,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:48,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:48,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:48,654 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:48,656 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:48,659 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:32:48,659 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:48,816 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:48,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:48,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1670, Invalid=5136, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 07:32:48,818 INFO L87 Difference]: Start difference. First operand 283 states and 476 transitions. Second operand 15 states. [2020-04-18 07:32:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:49,625 INFO L93 Difference]: Finished difference Result 299 states and 494 transitions. [2020-04-18 07:32:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 494 transitions. [2020-04-18 07:32:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:49,627 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:32:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:49,627 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 48 times [2020-04-18 07:32:49,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:49,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008317487] [2020-04-18 07:32:49,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:49,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008317487] [2020-04-18 07:32:49,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546672588] [2020-04-18 07:32:49,705 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 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 [2020-04-18 07:32:49,751 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:49,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:49,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:49,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:49,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:49,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:49,877 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:49,878 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:49,880 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:32:49,881 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:50,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:50,046 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:32:50,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:50,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2167, Invalid=6575, Unknown=0, NotChecked=0, Total=8742 [2020-04-18 07:32:50,048 INFO L87 Difference]: Start difference. First operand 299 states and 494 transitions. Second operand 16 states. [2020-04-18 07:32:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:50,913 INFO L93 Difference]: Finished difference Result 308 states and 503 transitions. [2020-04-18 07:32:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 503 transitions. [2020-04-18 07:32:50,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:50,915 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:32:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 49 times [2020-04-18 07:32:50,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:50,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423559186] [2020-04-18 07:32:50,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:51,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423559186] [2020-04-18 07:32:51,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815291119] [2020-04-18 07:32:51,010 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 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 [2020-04-18 07:32:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:51,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:51,062 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:51,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:51,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:51,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:51,149 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:51,149 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:51,151 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:32:51,151 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:51,438 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:51,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=8559, Unknown=0, NotChecked=0, Total=11342 [2020-04-18 07:32:51,440 INFO L87 Difference]: Start difference. First operand 308 states and 503 transitions. Second operand 15 states. [2020-04-18 07:32:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:52,620 INFO L93 Difference]: Finished difference Result 330 states and 529 transitions. [2020-04-18 07:32:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 529 transitions. [2020-04-18 07:32:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:52,621 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:32:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:52,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 50 times [2020-04-18 07:32:52,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:52,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464336496] [2020-04-18 07:32:52,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:52,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464336496] [2020-04-18 07:32:52,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94273916] [2020-04-18 07:32:52,691 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 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 [2020-04-18 07:32:52,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:52,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:52,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:52,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:52,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:52,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:52,838 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:52,839 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:52,840 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:52,841 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:52,920 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:52,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:52,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3506, Invalid=11256, Unknown=0, NotChecked=0, Total=14762 [2020-04-18 07:32:52,921 INFO L87 Difference]: Start difference. First operand 330 states and 529 transitions. Second operand 15 states. [2020-04-18 07:32:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:53,317 INFO L93 Difference]: Finished difference Result 341 states and 536 transitions. [2020-04-18 07:32:53,317 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2020-04-18 07:32:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:53,318 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 07:32:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:53,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 51 times [2020-04-18 07:32:53,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:53,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020754944] [2020-04-18 07:32:53,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:53,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020754944] [2020-04-18 07:32:53,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567134047] [2020-04-18 07:32:53,417 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 07:32:53,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:53,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:53,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:53,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:53,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:53,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:53,594 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:53,596 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:53,597 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:53,597 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:53,727 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:53,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:53,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3693, Invalid=12057, Unknown=0, NotChecked=0, Total=15750 [2020-04-18 07:32:53,729 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand 15 states. [2020-04-18 07:32:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:54,344 INFO L93 Difference]: Finished difference Result 353 states and 545 transitions. [2020-04-18 07:32:54,344 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 545 transitions. [2020-04-18 07:32:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:54,345 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 07:32:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 52 times [2020-04-18 07:32:54,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:54,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682936273] [2020-04-18 07:32:54,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:54,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682936273] [2020-04-18 07:32:54,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156768169] [2020-04-18 07:32:54,436 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 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 [2020-04-18 07:32:54,480 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:54,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:54,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:54,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:54,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:54,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:54,575 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:54,576 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:54,577 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:32:54,577 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:54,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:54,788 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:32:54,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=13681, Unknown=0, NotChecked=0, Total=17822 [2020-04-18 07:32:54,790 INFO L87 Difference]: Start difference. First operand 353 states and 545 transitions. Second operand 16 states. [2020-04-18 07:32:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:55,590 INFO L93 Difference]: Finished difference Result 365 states and 551 transitions. [2020-04-18 07:32:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 551 transitions. [2020-04-18 07:32:55,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:55,592 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 07:32:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:55,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 53 times [2020-04-18 07:32:55,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:55,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855276563] [2020-04-18 07:32:55,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:55,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855276563] [2020-04-18 07:32:55,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176714849] [2020-04-18 07:32:55,693 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 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 [2020-04-18 07:32:55,745 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:32:55,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:55,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:55,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:55,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:55,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:55,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:55,959 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:55,961 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:55,963 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:55,964 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:59,935 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4913, Invalid=16545, Unknown=4, NotChecked=0, Total=21462 [2020-04-18 07:32:59,936 INFO L87 Difference]: Start difference. First operand 365 states and 551 transitions. Second operand 15 states. [2020-04-18 07:33:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:01,812 INFO L93 Difference]: Finished difference Result 386 states and 564 transitions. [2020-04-18 07:33:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 564 transitions. [2020-04-18 07:33:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:01,813 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 07:33:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:01,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 54 times [2020-04-18 07:33:01,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:01,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329886310] [2020-04-18 07:33:01,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:01,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329886310] [2020-04-18 07:33:01,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953949920] [2020-04-18 07:33:01,901 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 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 [2020-04-18 07:33:01,946 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:33:01,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:01,947 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:01,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:02,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:02,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:02,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:02,039 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:02,040 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:02,042 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:33:02,043 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:02,395 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:33:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6132, Invalid=21586, Unknown=4, NotChecked=0, Total=27722 [2020-04-18 07:33:02,398 INFO L87 Difference]: Start difference. First operand 386 states and 564 transitions. Second operand 15 states. [2020-04-18 07:33:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:03,522 INFO L93 Difference]: Finished difference Result 401 states and 577 transitions. [2020-04-18 07:33:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 577 transitions. [2020-04-18 07:33:03,523 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:03,524 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1290100799] [2020-04-18 07:33:03,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:03,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:33:03,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1290100799] [2020-04-18 07:33:03,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-04-18 07:33:03,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:03,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-04-18 07:33:03,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=24928, Unknown=4, NotChecked=0, Total=31862 [2020-04-18 07:33:03,528 INFO L87 Difference]: Start difference. First operand 146 states and 374 transitions. Second operand 88 states. [2020-04-18 07:33:09,143 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 12 [2020-04-18 07:33:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:25,546 INFO L93 Difference]: Finished difference Result 504 states and 1177 transitions. [2020-04-18 07:33:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-04-18 07:33:25,546 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 13 [2020-04-18 07:33:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:25,549 INFO L225 Difference]: With dead ends: 504 [2020-04-18 07:33:25,549 INFO L226 Difference]: Without dead ends: 456 [2020-04-18 07:33:25,551 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 574 SyntacticMatches, 74 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32425 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=12939, Invalid=48293, Unknown=24, NotChecked=0, Total=61256 [2020-04-18 07:33:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-04-18 07:33:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 172. [2020-04-18 07:33:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-18 07:33:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 470 transitions. [2020-04-18 07:33:25,561 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 470 transitions. Word has length 13 [2020-04-18 07:33:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:25,561 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 470 transitions. [2020-04-18 07:33:25,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-04-18 07:33:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 470 transitions. [2020-04-18 07:33:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:25,562 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:25,562 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:29,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:29,374 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:33:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 55 times [2020-04-18 07:33:29,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:29,376 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [799146039] [2020-04-18 07:33:29,377 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:29,377 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 149 transitions. [2020-04-18 07:33:29,378 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 07:33:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:29,378 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:29,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148993, now seen corresponding path program 56 times [2020-04-18 07:33:29,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:29,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744600073] [2020-04-18 07:33:29,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:29,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744600073] [2020-04-18 07:33:29,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787255830] [2020-04-18 07:33:29,450 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 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 [2020-04-18 07:33:29,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:29,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:29,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:29,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:29,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:29,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:29,602 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:29,603 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:29,605 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:33:29,605 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:29,741 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:33:29,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:29,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:33:29,742 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 15 states. [2020-04-18 07:33:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:30,045 INFO L93 Difference]: Finished difference Result 106 states and 221 transitions. [2020-04-18 07:33:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2020-04-18 07:33:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:30,046 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:33:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:30,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 57 times [2020-04-18 07:33:30,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:30,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508750302] [2020-04-18 07:33:30,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:30,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508750302] [2020-04-18 07:33:30,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836212184] [2020-04-18 07:33:30,126 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 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 [2020-04-18 07:33:30,170 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:33:30,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:30,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:30,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:30,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:30,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:30,269 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:30,270 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:30,271 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:33:30,271 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:30,377 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:33:30,378 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand 15 states. [2020-04-18 07:33:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:30,768 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2020-04-18 07:33:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 239 transitions. [2020-04-18 07:33:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:30,769 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:33:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:30,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 58 times [2020-04-18 07:33:30,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:30,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142192832] [2020-04-18 07:33:30,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:30,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142192832] [2020-04-18 07:33:30,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205767625] [2020-04-18 07:33:30,872 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 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 [2020-04-18 07:33:30,931 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:30,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:30,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:30,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:31,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:31,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:31,629 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:31,630 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:31,632 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:33:31,632 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:31,749 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:31,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 07:33:31,750 INFO L87 Difference]: Start difference. First operand 117 states and 239 transitions. Second operand 15 states. [2020-04-18 07:33:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:32,206 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 07:33:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 07:33:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:32,207 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:33:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 59 times [2020-04-18 07:33:32,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:32,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521893888] [2020-04-18 07:33:32,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:32,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521893888] [2020-04-18 07:33:32,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180155708] [2020-04-18 07:33:32,310 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 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 [2020-04-18 07:33:32,355 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:33:32,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:32,356 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:32,357 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:32,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:32,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:32,962 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:32,963 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:32,965 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:33:32,965 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:33,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:33,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:33,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:33,180 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=1708, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 07:33:33,181 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 07:33:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:33,812 INFO L93 Difference]: Finished difference Result 156 states and 295 transitions. [2020-04-18 07:33:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 295 transitions. [2020-04-18 07:33:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:33,813 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:33:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 60 times [2020-04-18 07:33:33,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:33,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150947913] [2020-04-18 07:33:33,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:33,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150947913] [2020-04-18 07:33:33,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294928200] [2020-04-18 07:33:33,904 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 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 [2020-04-18 07:33:33,948 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:33,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:33,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:33,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:34,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:34,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:34,047 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:34,048 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:34,050 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:33:34,050 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:34,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:34,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:34,176 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:34,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=2478, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 07:33:34,177 INFO L87 Difference]: Start difference. First operand 156 states and 295 transitions. Second operand 17 states. [2020-04-18 07:33:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:34,748 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2020-04-18 07:33:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 302 transitions. [2020-04-18 07:33:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:34,749 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:33:34,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:34,750 INFO L82 PathProgramCache]: Analyzing trace with hash 9426703, now seen corresponding path program 61 times [2020-04-18 07:33:34,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:34,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120964122] [2020-04-18 07:33:34,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:34,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120964122] [2020-04-18 07:33:34,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631745243] [2020-04-18 07:33:34,839 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 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 [2020-04-18 07:33:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:34,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:34,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:34,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:34,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:34,987 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:34,987 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:34,989 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:33:34,989 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:35,045 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3064, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 07:33:35,046 INFO L87 Difference]: Start difference. First operand 164 states and 302 transitions. Second operand 15 states. [2020-04-18 07:33:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:35,375 INFO L93 Difference]: Finished difference Result 182 states and 332 transitions. [2020-04-18 07:33:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 332 transitions. [2020-04-18 07:33:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:35,376 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:33:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:35,376 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 62 times [2020-04-18 07:33:35,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:35,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868665721] [2020-04-18 07:33:35,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:35,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868665721] [2020-04-18 07:33:35,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648378623] [2020-04-18 07:33:35,451 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 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 [2020-04-18 07:33:35,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:35,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:35,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:35,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:35,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:35,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:35,592 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:35,593 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:35,594 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:33:35,595 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:35,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:35,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:35,691 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:35,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:35,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 07:33:35,693 INFO L87 Difference]: Start difference. First operand 182 states and 332 transitions. Second operand 17 states. [2020-04-18 07:33:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:36,295 INFO L93 Difference]: Finished difference Result 201 states and 361 transitions. [2020-04-18 07:33:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 361 transitions. [2020-04-18 07:33:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:36,296 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:33:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 63 times [2020-04-18 07:33:36,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:36,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063413874] [2020-04-18 07:33:36,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:36,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063413874] [2020-04-18 07:33:36,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463836011] [2020-04-18 07:33:36,370 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 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 [2020-04-18 07:33:36,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:33:36,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:36,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:36,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:36,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:36,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:36,956 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:36,956 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:36,958 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:33:36,958 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:36,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:36,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:37,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:37,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:37,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:37,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:37,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:37,088 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:33:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:33:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=3978, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 07:33:37,089 INFO L87 Difference]: Start difference. First operand 201 states and 361 transitions. Second operand 19 states. [2020-04-18 07:33:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:38,163 INFO L93 Difference]: Finished difference Result 237 states and 410 transitions. [2020-04-18 07:33:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 410 transitions. [2020-04-18 07:33:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:38,164 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:33:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:38,165 INFO L82 PathProgramCache]: Analyzing trace with hash 646656193, now seen corresponding path program 64 times [2020-04-18 07:33:38,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:38,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059585175] [2020-04-18 07:33:38,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:38,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059585175] [2020-04-18 07:33:38,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766266452] [2020-04-18 07:33:38,240 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 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 [2020-04-18 07:33:38,283 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:38,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:38,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:38,284 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:38,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:38,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:38,385 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:38,386 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:38,388 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 39 transitions. [2020-04-18 07:33:38,388 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:38,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:38,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:38,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:38,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:38,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:38,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:38,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:38,676 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 07:33:38,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:33:38,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=5905, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 07:33:38,677 INFO L87 Difference]: Start difference. First operand 237 states and 410 transitions. Second operand 20 states. [2020-04-18 07:33:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:39,301 INFO L93 Difference]: Finished difference Result 268 states and 455 transitions. [2020-04-18 07:33:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 455 transitions. [2020-04-18 07:33:39,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:39,302 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:33:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:39,303 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 65 times [2020-04-18 07:33:39,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:39,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618952412] [2020-04-18 07:33:39,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:39,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618952412] [2020-04-18 07:33:39,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739575577] [2020-04-18 07:33:39,367 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 [2020-04-18 07:33:39,407 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:39,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:39,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:39,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:39,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:39,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:39,502 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:39,503 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:39,504 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:33:39,504 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:39,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:39,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:39,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:39,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:39,724 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 07:33:39,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:33:39,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=7200, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 07:33:39,726 INFO L87 Difference]: Start difference. First operand 268 states and 455 transitions. Second operand 18 states. [2020-04-18 07:33:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:40,553 INFO L93 Difference]: Finished difference Result 284 states and 475 transitions. [2020-04-18 07:33:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 475 transitions. [2020-04-18 07:33:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:40,554 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:33:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:40,555 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 66 times [2020-04-18 07:33:40,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:40,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479244652] [2020-04-18 07:33:40,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:40,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479244652] [2020-04-18 07:33:40,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457134558] [2020-04-18 07:33:40,620 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 [2020-04-18 07:33:40,663 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:40,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:40,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:40,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:40,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:40,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:40,768 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:40,768 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:40,770 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:33:40,770 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:40,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,005 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:33:41,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:33:41,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=8955, Unknown=0, NotChecked=0, Total=11556 [2020-04-18 07:33:41,006 INFO L87 Difference]: Start difference. First operand 284 states and 475 transitions. Second operand 16 states. [2020-04-18 07:33:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:41,897 INFO L93 Difference]: Finished difference Result 303 states and 492 transitions. [2020-04-18 07:33:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 492 transitions. [2020-04-18 07:33:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:41,898 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:33:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:41,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 67 times [2020-04-18 07:33:41,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:41,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793633865] [2020-04-18 07:33:41,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:41,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793633865] [2020-04-18 07:33:41,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632169104] [2020-04-18 07:33:41,988 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 [2020-04-18 07:33:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:42,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:42,031 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:42,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:42,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:42,163 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:42,163 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:42,165 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:33:42,165 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:42,252 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:33:42,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:42,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3020, Invalid=10552, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 07:33:42,253 INFO L87 Difference]: Start difference. First operand 303 states and 492 transitions. Second operand 15 states. [2020-04-18 07:33:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:42,943 INFO L93 Difference]: Finished difference Result 326 states and 515 transitions. [2020-04-18 07:33:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 515 transitions. [2020-04-18 07:33:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:42,944 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:33:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:42,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 68 times [2020-04-18 07:33:42,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:42,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674212740] [2020-04-18 07:33:42,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:43,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674212740] [2020-04-18 07:33:43,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710071173] [2020-04-18 07:33:43,008 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 [2020-04-18 07:33:43,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:43,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:43,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:43,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:43,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:43,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:43,138 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:43,139 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:43,140 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:33:43,140 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:43,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:43,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:43,285 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 07:33:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:43,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3356, Invalid=11896, Unknown=0, NotChecked=0, Total=15252 [2020-04-18 07:33:43,287 INFO L87 Difference]: Start difference. First operand 326 states and 515 transitions. Second operand 17 states. [2020-04-18 07:33:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:44,252 INFO L93 Difference]: Finished difference Result 350 states and 530 transitions. [2020-04-18 07:33:44,252 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2020-04-18 07:33:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:44,253 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:33:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:44,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 69 times [2020-04-18 07:33:44,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:44,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333129816] [2020-04-18 07:33:44,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:44,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333129816] [2020-04-18 07:33:44,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353885169] [2020-04-18 07:33:44,320 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 [2020-04-18 07:33:44,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:33:44,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:44,366 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-18 07:33:44,367 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:44,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:44,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:44,472 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:44,474 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:44,475 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:33:44,475 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:44,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:44,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:44,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:44,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:44,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:44,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:44,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:44,868 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:33:44,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3977, Invalid=15763, Unknown=0, NotChecked=0, Total=19740 [2020-04-18 07:33:44,870 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand 19 states. [2020-04-18 07:33:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:46,623 INFO L93 Difference]: Finished difference Result 370 states and 543 transitions. [2020-04-18 07:33:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 543 transitions. [2020-04-18 07:33:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:46,624 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:33:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 70 times [2020-04-18 07:33:46,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:46,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596777185] [2020-04-18 07:33:46,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:46,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596777185] [2020-04-18 07:33:46,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39783535] [2020-04-18 07:33:46,688 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 [2020-04-18 07:33:46,731 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:46,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:46,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:46,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:46,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:46,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:46,823 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:46,824 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:46,827 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:33:46,827 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:46,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:46,992 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:47,033 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:33:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:33:47,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5196, Invalid=20886, Unknown=0, NotChecked=0, Total=26082 [2020-04-18 07:33:47,036 INFO L87 Difference]: Start difference. First operand 370 states and 543 transitions. Second operand 16 states. [2020-04-18 07:33:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:48,014 INFO L93 Difference]: Finished difference Result 371 states and 543 transitions. [2020-04-18 07:33:48,015 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 543 transitions. [2020-04-18 07:33:48,015 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:48,017 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [799146039] [2020-04-18 07:33:48,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:48,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:33:48,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [799146039] [2020-04-18 07:33:48,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-04-18 07:33:48,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-04-18 07:33:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5684, Invalid=22708, Unknown=0, NotChecked=0, Total=28392 [2020-04-18 07:33:48,020 INFO L87 Difference]: Start difference. First operand 172 states and 470 transitions. Second operand 86 states. [2020-04-18 07:33:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:52,418 INFO L93 Difference]: Finished difference Result 434 states and 1036 transitions. [2020-04-18 07:33:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-04-18 07:33:52,418 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 13 [2020-04-18 07:33:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:52,422 INFO L225 Difference]: With dead ends: 434 [2020-04-18 07:33:52,423 INFO L226 Difference]: Without dead ends: 410 [2020-04-18 07:33:52,425 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 419 SyntacticMatches, 56 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26006 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=9807, Invalid=40593, Unknown=0, NotChecked=0, Total=50400 [2020-04-18 07:33:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-04-18 07:33:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 191. [2020-04-18 07:33:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-04-18 07:33:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 514 transitions. [2020-04-18 07:33:52,434 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 514 transitions. Word has length 13 [2020-04-18 07:33:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:52,434 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 514 transitions. [2020-04-18 07:33:52,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-04-18 07:33:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 514 transitions. [2020-04-18 07:33:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:33:52,435 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:52,435 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:55,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:55,446 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:33:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:55,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 71 times [2020-04-18 07:33:55,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:55,447 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [158429032] [2020-04-18 07:33:55,448 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:55,449 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 186 transitions. [2020-04-18 07:33:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 07:33:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:33:55,450 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:55,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 72 times [2020-04-18 07:33:55,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:55,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628512544] [2020-04-18 07:33:55,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:55,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628512544] [2020-04-18 07:33:55,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69279306] [2020-04-18 07:33:55,546 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 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 [2020-04-18 07:33:55,590 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:55,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:55,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:33:55,592 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:55,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:55,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:33:55,718 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:55,719 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:55,721 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:33:55,721 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:55,897 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:33:55,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:55,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:33:55,898 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 17 states. [2020-04-18 07:33:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:56,278 INFO L93 Difference]: Finished difference Result 130 states and 277 transitions. [2020-04-18 07:33:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 277 transitions. [2020-04-18 07:33:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:33:56,279 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:33:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 73 times [2020-04-18 07:33:56,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:56,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606864841] [2020-04-18 07:33:56,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:56,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606864841] [2020-04-18 07:33:56,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894985832] [2020-04-18 07:33:56,367 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 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 [2020-04-18 07:33:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:56,437 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:33:56,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:04,747 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:34:04,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:04,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:04,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:34:04,748 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:04,749 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:04,752 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 07:34:04,752 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:15,217 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:34:15,219 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:34:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:34:15,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=462, Unknown=4, NotChecked=0, Total=702 [2020-04-18 07:34:15,220 INFO L87 Difference]: Start difference. First operand 130 states and 277 transitions. Second operand 18 states. [2020-04-18 07:34:18,035 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-18 07:34:20,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:20,334 INFO L93 Difference]: Finished difference Result 146 states and 302 transitions. [2020-04-18 07:34:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 302 transitions. [2020-04-18 07:34:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:20,334 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:34:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:20,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 74 times [2020-04-18 07:34:20,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:20,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817499522] [2020-04-18 07:34:20,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:20,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817499522] [2020-04-18 07:34:20,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99892673] [2020-04-18 07:34:20,420 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 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 [2020-04-18 07:34:20,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:20,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:20,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:20,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:22,975 WARN L192 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-18 07:34:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:22,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:22,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:34:22,977 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:22,979 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:22,981 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:34:22,981 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:26,499 WARN L192 SmtUtils]: Spent 546.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-18 07:34:26,500 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:34:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:34:26,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=927, Unknown=8, NotChecked=0, Total=1406 [2020-04-18 07:34:26,501 INFO L87 Difference]: Start difference. First operand 146 states and 302 transitions. Second operand 18 states. [2020-04-18 07:34:27,271 WARN L192 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-18 07:34:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:29,311 INFO L93 Difference]: Finished difference Result 157 states and 316 transitions. [2020-04-18 07:34:29,311 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 316 transitions. [2020-04-18 07:34:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:29,312 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:34:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:29,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 75 times [2020-04-18 07:34:29,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:29,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585583234] [2020-04-18 07:34:29,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:29,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585583234] [2020-04-18 07:34:29,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167732666] [2020-04-18 07:34:29,403 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 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 [2020-04-18 07:34:29,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:34:29,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:29,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:29,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:29,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:29,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:29,575 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:29,576 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:29,577 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:34:29,578 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:31,998 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:34:31,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:31,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1605, Unknown=11, NotChecked=0, Total=2352 [2020-04-18 07:34:31,999 INFO L87 Difference]: Start difference. First operand 157 states and 316 transitions. Second operand 17 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown