/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 11:47:40,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 11:47:40,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 11:47:40,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 11:47:40,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 11:47:40,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 11:47:40,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 11:47:40,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 11:47:40,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 11:47:40,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 11:47:40,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 11:47:40,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 11:47:40,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 11:47:40,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 11:47:40,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 11:47:40,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 11:47:40,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 11:47:40,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 11:47:40,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 11:47:40,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 11:47:40,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 11:47:40,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 11:47:40,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 11:47:40,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 11:47:40,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 11:47:40,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 11:47:40,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 11:47:40,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 11:47:40,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 11:47:40,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 11:47:40,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 11:47:40,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 11:47:40,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 11:47:40,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 11:47:40,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 11:47:40,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 11:47:40,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 11:47:40,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 11:47:40,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 11:47:40,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 11:47:40,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 11:47:40,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf [2020-04-18 11:47:40,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 11:47:40,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 11:47:40,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 11:47:40,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 11:47:40,921 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 11:47:40,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 11:47:40,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 11:47:40,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 11:47:40,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 11:47:40,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 11:47:40,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 11:47:40,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 11:47:40,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 11:47:40,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 11:47:40,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 11:47:40,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 11:47:40,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 11:47:40,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 11:47:40,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 11:47:40,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 11:47:40,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 11:47:40,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:47:40,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 11:47:40,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 11:47:40,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 11:47:40,925 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 11:47:40,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 11:47:40,925 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 11:47:40,926 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 11:47:40,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 11:47:40,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 11:47:41,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 11:47:41,261 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 11:47:41,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 11:47:41,266 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 11:47:41,266 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 11:47:41,267 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-18 11:47:41,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbee43460/a44af7ea40ca4dfcac571cf0fd788865/FLAGf38f7090d [2020-04-18 11:47:41,876 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 11:47:41,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-18 11:47:41,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbee43460/a44af7ea40ca4dfcac571cf0fd788865/FLAGf38f7090d [2020-04-18 11:47:42,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbee43460/a44af7ea40ca4dfcac571cf0fd788865 [2020-04-18 11:47:42,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 11:47:42,225 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 11:47:42,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:42,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 11:47:42,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 11:47:42,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603ade07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42, skipping insertion in model container [2020-04-18 11:47:42,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 11:47:42,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 11:47:42,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:42,809 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 11:47:42,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:42,926 INFO L208 MainTranslator]: Completed translation [2020-04-18 11:47:42,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42 WrapperNode [2020-04-18 11:47:42,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:42,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:42,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 11:47:42,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 11:47:42,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:42,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 11:47:42,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 11:47:42,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 11:47:43,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 11:47:43,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 11:47:43,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 11:47:43,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 11:47:43,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:47:43,081 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 11:47:43,081 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 11:47:43,081 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 11:47:43,081 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 11:47:43,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 11:47:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 11:47:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 11:47:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 11:47:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 11:47:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 11:47:43,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 11:47:43,084 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 11:47:43,477 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 11:47:43,477 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 11:47:43,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:43 BoogieIcfgContainer [2020-04-18 11:47:43,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 11:47:43,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 11:47:43,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 11:47:43,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 11:47:43,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 11:47:42" (1/3) ... [2020-04-18 11:47:43,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec75c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:43, skipping insertion in model container [2020-04-18 11:47:43,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (2/3) ... [2020-04-18 11:47:43,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec75c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:43, skipping insertion in model container [2020-04-18 11:47:43,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:43" (3/3) ... [2020-04-18 11:47:43,491 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-04-18 11:47:43,501 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 11:47:43,501 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 11:47:43,509 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 11:47:43,510 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 11:47:43,544 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,545 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,545 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,545 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,546 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,546 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,547 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,547 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,547 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,547 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,548 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,548 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,549 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,549 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,549 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,551 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,551 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,551 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,551 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,552 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,552 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,553 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,553 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,553 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,553 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,554 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,554 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,554 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,555 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,555 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,561 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,561 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,561 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,562 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,562 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,562 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,570 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,570 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,571 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,571 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,571 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,571 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,589 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 11:47:43,607 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 11:47:43,607 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 11:47:43,607 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 11:47:43,608 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 11:47:43,608 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 11:47:43,608 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 11:47:43,608 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 11:47:43,608 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 11:47:43,622 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,624 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,665 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 11:47:43,665 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:47:43,671 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 11:47:43,674 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,692 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 11:47:43,693 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:47:43,694 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 11:47:43,696 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-18 11:47:43,697 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 11:47:44,791 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-18 11:47:44,867 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-18 11:47:44,867 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-18 11:47:44,871 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-18 11:47:44,883 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 11:47:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:47:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:47:44,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:44,893 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 11:47:44,894 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:44,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:44,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-18 11:47:44,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:44,908 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1834394649] [2020-04-18 11:47:44,922 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:44,934 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:47:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 11:47:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:47:44,937 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 2 times [2020-04-18 11:47:44,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:44,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498811699] [2020-04-18 11:47:44,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498811699] [2020-04-18 11:47:45,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:45,188 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,191 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,195 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:47:45,195 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,215 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:47:45,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:47:45,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 11:47:45,223 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 11:47:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,248 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 11:47:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 11:47:45,248 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:45,251 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1834394649] [2020-04-18 11:47:45,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:45,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:47:45,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1834394649] [2020-04-18 11:47:45,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 11:47:45,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:45,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:47:45,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,266 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 11:47:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,315 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-18 11:47:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 11:47:45,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 11:47:45,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:45,330 INFO L225 Difference]: With dead ends: 83 [2020-04-18 11:47:45,330 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 11:47:45,332 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 11:47:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 11:47:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-18 11:47:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 11:47:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-18 11:47:45,384 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-18 11:47:45,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:45,384 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-18 11:47:45,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 11:47:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-18 11:47:45,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,386 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:45,386 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:45,386 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,387 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-18 11:47:45,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:45,387 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [841157320] [2020-04-18 11:47:45,388 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,389 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 11:47:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 11:47:45,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,390 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 235305767, now seen corresponding path program 2 times [2020-04-18 11:47:45,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339235939] [2020-04-18 11:47:45,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339235939] [2020-04-18 11:47:45,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:45,518 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,518 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,522 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 18 transitions. [2020-04-18 11:47:45,522 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,563 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:45,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:47:45,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,563 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 11:47:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,614 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 11:47:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 11:47:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,614 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,615 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 3 times [2020-04-18 11:47:45,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943051078] [2020-04-18 11:47:45,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943051078] [2020-04-18 11:47:45,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:47:45,740 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,741 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,744 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 11:47:45,744 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,758 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:47:45,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:45,759 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 5 states. [2020-04-18 11:47:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,789 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 11:47:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 11:47:45,790 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:45,790 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [841157320] [2020-04-18 11:47:45,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:45,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:47:45,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [841157320] [2020-04-18 11:47:45,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 11:47:45,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:45,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:45,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:47:45,793 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 6 states. [2020-04-18 11:47:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,930 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-18 11:47:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 11:47:45,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 11:47:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:45,932 INFO L225 Difference]: With dead ends: 80 [2020-04-18 11:47:45,932 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 11:47:45,934 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 11:47:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 11:47:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-18 11:47:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 11:47:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-18 11:47:45,943 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-18 11:47:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:45,945 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-18 11:47:45,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 11:47:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-18 11:47:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,947 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:45,947 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:45,948 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:45,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-18 11:47:45,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:45,949 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [648727255] [2020-04-18 11:47:45,949 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,950 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 11:47:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-04-18 11:47:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,953 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,953 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 2 times [2020-04-18 11:47:45,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223030930] [2020-04-18 11:47:45,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223030930] [2020-04-18 11:47:46,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:47:46,032 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,033 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,034 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-04-18 11:47:46,034 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,078 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:46,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:46,079 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2020-04-18 11:47:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,108 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-04-18 11:47:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-04-18 11:47:46,108 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:46,109 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [648727255] [2020-04-18 11:47:46,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:46,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:47:46,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [648727255] [2020-04-18 11:47:46,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 11:47:46,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:46,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:46,110 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 6 states. [2020-04-18 11:47:46,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,158 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-04-18 11:47:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 11:47:46,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 11:47:46,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:46,160 INFO L225 Difference]: With dead ends: 83 [2020-04-18 11:47:46,160 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 11:47:46,161 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 11:47:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 11:47:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-04-18 11:47:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 11:47:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-18 11:47:46,170 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-18 11:47:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:46,170 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-18 11:47:46,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 11:47:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-18 11:47:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,171 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:46,172 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:46,172 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 4 times [2020-04-18 11:47:46,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:46,173 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1321005176] [2020-04-18 11:47:46,173 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,174 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 11:47:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:47:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,175 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1295455160, now seen corresponding path program 5 times [2020-04-18 11:47:46,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123949694] [2020-04-18 11:47:46,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:47:46,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123949694] [2020-04-18 11:47:46,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:46,232 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,233 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,235 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:46,235 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,282 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 11:47:46,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:46,284 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-04-18 11:47:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,341 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2020-04-18 11:47:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2020-04-18 11:47:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,342 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1294792070, now seen corresponding path program 6 times [2020-04-18 11:47:46,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623289372] [2020-04-18 11:47:46,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623289372] [2020-04-18 11:47:46,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748876264] [2020-04-18 11:47:46,414 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 11:47:46,479 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:46,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:46,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 11:47:46,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:46,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:46,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-04-18 11:47:46,542 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,543 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,545 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2020-04-18 11:47:46,545 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,588 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:47:46,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:46,589 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2020-04-18 11:47:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,672 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 11:47:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 11:47:46,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,673 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 7 times [2020-04-18 11:47:46,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506747153] [2020-04-18 11:47:46,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506747153] [2020-04-18 11:47:46,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86748113] [2020-04-18 11:47:46,757 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 11:47:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:47:46,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:46,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:46,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-18 11:47:46,880 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,881 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,883 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:46,884 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,920 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:46,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:47:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:47:46,921 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 10 states. [2020-04-18 11:47:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,983 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 11:47:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 11:47:46,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:46,985 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1321005176] [2020-04-18 11:47:46,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:46,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:46,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1321005176] [2020-04-18 11:47:46,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:47:46,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:46,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:46,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:46,986 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 12 states. [2020-04-18 11:47:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:47,206 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-18 11:47:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:47:47,207 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 11:47:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:47,209 INFO L225 Difference]: With dead ends: 101 [2020-04-18 11:47:47,209 INFO L226 Difference]: Without dead ends: 96 [2020-04-18 11:47:47,209 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 11:47:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-18 11:47:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-18 11:47:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 11:47:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-18 11:47:47,220 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-18 11:47:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:47,220 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-18 11:47:47,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:47:47,220 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-18 11:47:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:47,221 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:47,221 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:47,625 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 11:47:47,626 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-18 11:47:47,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:47,627 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [991987426] [2020-04-18 11:47:47,628 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:47,628 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 11:47:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:47,629 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 4 times [2020-04-18 11:47:47,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:47,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332089877] [2020-04-18 11:47:47,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:47,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332089877] [2020-04-18 11:47:47,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666885022] [2020-04-18 11:47:47,727 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 11:47:47,780 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:47:47,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:47,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:47:47,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:47,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:47,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-18 11:47:47,868 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:47,869 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:47,870 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-04-18 11:47:47,870 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:47,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:47,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:47,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:47,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:47,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:47,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,014 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:47:48,015 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 12 states. [2020-04-18 11:47:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,074 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2020-04-18 11:47:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-04-18 11:47:48,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:48,075 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [991987426] [2020-04-18 11:47:48,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:48,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:48,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [991987426] [2020-04-18 11:47:48,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:47:48,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:48,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:48,077 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 12 states. [2020-04-18 11:47:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,124 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-04-18 11:47:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 11:47:48,124 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 11:47:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:48,125 INFO L225 Difference]: With dead ends: 104 [2020-04-18 11:47:48,126 INFO L226 Difference]: Without dead ends: 98 [2020-04-18 11:47:48,127 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 11:47:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-18 11:47:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-04-18 11:47:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 11:47:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-18 11:47:48,144 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 9 [2020-04-18 11:47:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:48,144 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-18 11:47:48,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:47:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-18 11:47:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,145 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:48,145 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:48,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:48,350 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-18 11:47:48,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:48,351 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [573100165] [2020-04-18 11:47:48,352 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,353 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 11:47:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 11:47:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,354 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 2 times [2020-04-18 11:47:48,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084512121] [2020-04-18 11:47:48,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084512121] [2020-04-18 11:47:48,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:48,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:48,436 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,437 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,439 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-04-18 11:47:48,439 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,470 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:48,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:48,470 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-04-18 11:47:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,523 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2020-04-18 11:47:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 79 transitions. [2020-04-18 11:47:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,524 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 3 times [2020-04-18 11:47:48,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791453402] [2020-04-18 11:47:48,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791453402] [2020-04-18 11:47:48,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:48,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:48,585 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,586 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,588 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:48,588 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,625 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:48,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:47:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:47:48,626 INFO L87 Difference]: Start difference. First operand 45 states and 79 transitions. Second operand 7 states. [2020-04-18 11:47:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,694 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2020-04-18 11:47:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 83 transitions. [2020-04-18 11:47:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,694 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:48,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-18 11:47:48,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906975346] [2020-04-18 11:47:48,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906975346] [2020-04-18 11:47:48,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:48,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:48,751 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,752 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,754 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 11:47:48,754 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,789 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:47:48,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:48,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:47:48,790 INFO L87 Difference]: Start difference. First operand 50 states and 83 transitions. Second operand 6 states. [2020-04-18 11:47:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,862 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2020-04-18 11:47:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2020-04-18 11:47:48,862 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:48,863 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [573100165] [2020-04-18 11:47:48,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:48,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:48,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [573100165] [2020-04-18 11:47:48,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 11:47:48,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:47:48,864 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 11 states. [2020-04-18 11:47:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,956 INFO L93 Difference]: Finished difference Result 124 states and 288 transitions. [2020-04-18 11:47:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 11:47:48,957 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-18 11:47:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:48,958 INFO L225 Difference]: With dead ends: 124 [2020-04-18 11:47:48,958 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 11:47:48,959 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 11:47:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 11:47:48,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-04-18 11:47:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-18 11:47:48,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 210 transitions. [2020-04-18 11:47:48,967 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 210 transitions. Word has length 10 [2020-04-18 11:47:48,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:48,967 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 210 transitions. [2020-04-18 11:47:48,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 11:47:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 210 transitions. [2020-04-18 11:47:48,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,968 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:48,969 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:48,969 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 5 times [2020-04-18 11:47:48,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:48,970 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [804720551] [2020-04-18 11:47:48,970 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,971 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 11:47:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,972 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-18 11:47:48,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702067549] [2020-04-18 11:47:48,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702067549] [2020-04-18 11:47:49,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698984884] [2020-04-18 11:47:49,072 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 11:47:49,132 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:49,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:49,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:49,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:49,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:49,231 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:49,232 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,234 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 11:47:49,234 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:49,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,487 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:47:49,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:47:49,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:47:49,488 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 16 states. [2020-04-18 11:47:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,605 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-04-18 11:47:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-04-18 11:47:49,605 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:49,606 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [804720551] [2020-04-18 11:47:49,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:49,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:49,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [804720551] [2020-04-18 11:47:49,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:47:49,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:49,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:47:49,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:49,607 INFO L87 Difference]: Start difference. First operand 87 states and 210 transitions. Second operand 16 states. [2020-04-18 11:47:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,681 INFO L93 Difference]: Finished difference Result 122 states and 292 transitions. [2020-04-18 11:47:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 11:47:49,682 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-04-18 11:47:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:49,683 INFO L225 Difference]: With dead ends: 122 [2020-04-18 11:47:49,683 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 11:47:49,684 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 11:47:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-04-18 11:47:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-18 11:47:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-04-18 11:47:49,691 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 10 [2020-04-18 11:47:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:49,692 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-04-18 11:47:49,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:47:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-04-18 11:47:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:49,692 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:49,693 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:49,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:49,905 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-18 11:47:49,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:49,906 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1243456615] [2020-04-18 11:47:49,907 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,908 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 91 transitions. [2020-04-18 11:47:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 11:47:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:49,909 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 6 times [2020-04-18 11:47:49,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:49,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807539405] [2020-04-18 11:47:49,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807539405] [2020-04-18 11:47:49,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142655318] [2020-04-18 11:47:49,987 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 11:47:50,053 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:50,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:50,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:50,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:50,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:50,177 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:50,177 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:50,179 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 28 transitions. [2020-04-18 11:47:50,179 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:50,280 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:50,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:50,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:50,281 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 11 states. [2020-04-18 11:47:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,409 INFO L93 Difference]: Finished difference Result 62 states and 117 transitions. [2020-04-18 11:47:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 117 transitions. [2020-04-18 11:47:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,410 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 7 times [2020-04-18 11:47:50,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:50,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957333683] [2020-04-18 11:47:50,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957333683] [2020-04-18 11:47:50,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657081027] [2020-04-18 11:47:50,494 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 11:47:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:50,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:50,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:50,614 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:50,615 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:50,616 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 11:47:50,616 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:50,652 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:50,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:50,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:50,653 INFO L87 Difference]: Start difference. First operand 62 states and 117 transitions. Second operand 11 states. [2020-04-18 11:47:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,777 INFO L93 Difference]: Finished difference Result 70 states and 127 transitions. [2020-04-18 11:47:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 127 transitions. [2020-04-18 11:47:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,777 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 8 times [2020-04-18 11:47:50,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:50,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975774075] [2020-04-18 11:47:50,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975774075] [2020-04-18 11:47:50,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840340756] [2020-04-18 11:47:50,846 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:50,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:50,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:50,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:47:50,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:50,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-18 11:47:50,957 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:50,958 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:50,961 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:47:50,961 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:50,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:51,043 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:51,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:47:51,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:47:51,044 INFO L87 Difference]: Start difference. First operand 70 states and 127 transitions. Second operand 9 states. [2020-04-18 11:47:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:51,172 INFO L93 Difference]: Finished difference Result 81 states and 141 transitions. [2020-04-18 11:47:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-04-18 11:47:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:51,173 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:51,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 9 times [2020-04-18 11:47:51,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:51,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436115062] [2020-04-18 11:47:51,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436115062] [2020-04-18 11:47:51,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363487490] [2020-04-18 11:47:51,250 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 11:47:51,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:47:51,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:51,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:51,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:51,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:51,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:51,347 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:51,348 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:51,350 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-04-18 11:47:51,350 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:51,454 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:47:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:47:51,455 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 11 states. [2020-04-18 11:47:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:51,772 INFO L93 Difference]: Finished difference Result 90 states and 146 transitions. [2020-04-18 11:47:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 146 transitions. [2020-04-18 11:47:51,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:51,773 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:47:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:51,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 10 times [2020-04-18 11:47:51,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:51,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324103794] [2020-04-18 11:47:51,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324103794] [2020-04-18 11:47:51,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638669790] [2020-04-18 11:47:51,832 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 11:47:51,873 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:47:51,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:51,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:51,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:51,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:51,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:51,948 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:51,949 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:51,950 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-04-18 11:47:51,950 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:52,069 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:52,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:47:52,071 INFO L87 Difference]: Start difference. First operand 90 states and 146 transitions. Second operand 11 states. [2020-04-18 11:47:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:52,368 INFO L93 Difference]: Finished difference Result 97 states and 149 transitions. [2020-04-18 11:47:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 149 transitions. [2020-04-18 11:47:52,369 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:52,370 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1243456615] [2020-04-18 11:47:52,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:52,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:52,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1243456615] [2020-04-18 11:47:52,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 11:47:52,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:52,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:47:52,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1184, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 11:47:52,372 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 28 states. [2020-04-18 11:47:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:52,730 INFO L93 Difference]: Finished difference Result 217 states and 499 transitions. [2020-04-18 11:47:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 11:47:52,732 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 11 [2020-04-18 11:47:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:52,734 INFO L225 Difference]: With dead ends: 217 [2020-04-18 11:47:52,734 INFO L226 Difference]: Without dead ends: 198 [2020-04-18 11:47:52,735 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 11:47:52,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-18 11:47:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 107. [2020-04-18 11:47:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-04-18 11:47:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 271 transitions. [2020-04-18 11:47:52,752 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 271 transitions. Word has length 11 [2020-04-18 11:47:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:52,753 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 271 transitions. [2020-04-18 11:47:52,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 11:47:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 271 transitions. [2020-04-18 11:47:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:52,754 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:52,754 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:53,756 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 11:47:53,758 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:53,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 11 times [2020-04-18 11:47:53,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:53,759 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [855220911] [2020-04-18 11:47:53,760 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:53,760 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 11:47:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:47:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:53,761 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 12 times [2020-04-18 11:47:53,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:53,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298580371] [2020-04-18 11:47:53,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:53,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298580371] [2020-04-18 11:47:53,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376360310] [2020-04-18 11:47:53,842 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 11:47:53,889 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:53,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:53,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:53,891 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:53,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:53,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:53,956 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:53,957 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:53,959 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:53,959 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:54,040 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:47:54,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:54,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:54,041 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2020-04-18 11:47:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:54,181 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2020-04-18 11:47:54,182 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 11:47:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:54,182 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 13 times [2020-04-18 11:47:54,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:54,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725615363] [2020-04-18 11:47:54,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725615363] [2020-04-18 11:47:54,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840632400] [2020-04-18 11:47:54,257 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 11:47:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:54,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:54,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:54,386 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:54,387 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:54,389 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 11:47:54,390 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:54,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:54,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:54,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:54,501 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:54,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:54,502 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 13 states. [2020-04-18 11:47:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:54,732 INFO L93 Difference]: Finished difference Result 71 states and 126 transitions. [2020-04-18 11:47:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2020-04-18 11:47:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:54,732 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 14 times [2020-04-18 11:47:54,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:54,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152114107] [2020-04-18 11:47:54,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152114107] [2020-04-18 11:47:54,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060567867] [2020-04-18 11:47:54,809 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 11:47:54,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:54,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:54,853 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:54,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:54,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:54,912 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:54,913 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:54,915 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 11:47:54,915 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:54,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:54,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:54,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:54,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,031 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:47:55,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:47:55,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:47:55,032 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 14 states. [2020-04-18 11:47:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:55,269 INFO L93 Difference]: Finished difference Result 79 states and 134 transitions. [2020-04-18 11:47:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 134 transitions. [2020-04-18 11:47:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:55,270 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 15 times [2020-04-18 11:47:55,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:55,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139164102] [2020-04-18 11:47:55,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139164102] [2020-04-18 11:47:55,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810173156] [2020-04-18 11:47:55,334 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 11:47:55,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:47:55,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:55,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:55,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:55,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:55,474 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:55,475 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:55,476 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 11:47:55,476 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:55,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,517 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:55,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:55,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:47:55,518 INFO L87 Difference]: Start difference. First operand 79 states and 134 transitions. Second operand 12 states. [2020-04-18 11:47:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:55,759 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2020-04-18 11:47:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2020-04-18 11:47:55,759 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:55,760 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [855220911] [2020-04-18 11:47:55,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:55,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:55,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [855220911] [2020-04-18 11:47:55,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 11:47:55,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 11:47:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:47:55,762 INFO L87 Difference]: Start difference. First operand 107 states and 271 transitions. Second operand 23 states. [2020-04-18 11:47:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:55,913 INFO L93 Difference]: Finished difference Result 153 states and 367 transitions. [2020-04-18 11:47:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:47:55,914 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 11 [2020-04-18 11:47:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:55,915 INFO L225 Difference]: With dead ends: 153 [2020-04-18 11:47:55,915 INFO L226 Difference]: Without dead ends: 148 [2020-04-18 11:47:55,916 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 11:47:55,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-18 11:47:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2020-04-18 11:47:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-18 11:47:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2020-04-18 11:47:55,922 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 11 [2020-04-18 11:47:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:55,922 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2020-04-18 11:47:55,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 11:47:55,922 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2020-04-18 11:47:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:55,923 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:55,923 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:56,728 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 11:47:56,729 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 7 times [2020-04-18 11:47:56,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:56,730 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1975913695] [2020-04-18 11:47:56,731 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:56,731 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 11:47:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:47:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:56,732 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:56,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 8 times [2020-04-18 11:47:56,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:56,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736014320] [2020-04-18 11:47:56,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:56,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736014320] [2020-04-18 11:47:56,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054905815] [2020-04-18 11:47:56,833 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 11:47:56,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:56,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:56,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:56,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:57,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:57,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:57,006 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:57,007 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:57,009 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 11:47:57,009 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:57,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,305 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:47:57,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:47:57,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:47:57,306 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 20 states. [2020-04-18 11:47:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:57,480 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2020-04-18 11:47:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2020-04-18 11:47:57,480 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:57,481 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1975913695] [2020-04-18 11:47:57,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:57,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:47:57,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1975913695] [2020-04-18 11:47:57,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 11:47:57,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:57,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:47:57,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:47:57,483 INFO L87 Difference]: Start difference. First operand 110 states and 273 transitions. Second operand 20 states. [2020-04-18 11:47:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:57,586 INFO L93 Difference]: Finished difference Result 158 states and 382 transitions. [2020-04-18 11:47:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 11:47:57,586 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 11 [2020-04-18 11:47:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:57,587 INFO L225 Difference]: With dead ends: 158 [2020-04-18 11:47:57,587 INFO L226 Difference]: Without dead ends: 152 [2020-04-18 11:47:57,588 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 11:47:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-04-18 11:47:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2020-04-18 11:47:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-18 11:47:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-04-18 11:47:57,593 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 11 [2020-04-18 11:47:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:57,594 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-04-18 11:47:57,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 11:47:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-04-18 11:47:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:57,595 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:57,595 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:57,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:57,798 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:57,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 16 times [2020-04-18 11:47:57,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:57,799 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1415395262] [2020-04-18 11:47:57,800 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:57,801 INFO L259 McrAutomatonBuilder]: Finished intersection with 57 states and 116 transitions. [2020-04-18 11:47:57,802 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-04-18 11:47:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:57,802 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:57,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:57,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 17 times [2020-04-18 11:47:57,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:57,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480503841] [2020-04-18 11:47:57,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:57,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480503841] [2020-04-18 11:47:57,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843594584] [2020-04-18 11:47:57,887 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 11:47:57,926 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:57,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:57,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:57,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:58,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:58,020 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:58,020 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:58,022 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 11:47:58,022 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:58,177 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:58,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:58,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:58,178 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 13 states. [2020-04-18 11:47:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:58,336 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2020-04-18 11:47:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2020-04-18 11:47:58,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:58,337 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:58,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:58,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 18 times [2020-04-18 11:47:58,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:58,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928681330] [2020-04-18 11:47:58,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928681330] [2020-04-18 11:47:58,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345005813] [2020-04-18 11:47:58,434 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 11:47:58,481 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:58,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:58,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:58,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:58,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:58,584 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:58,585 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:58,587 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:47:58,587 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:58,623 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:47:58,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:58,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:58,624 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand 13 states. [2020-04-18 11:47:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:58,809 INFO L93 Difference]: Finished difference Result 93 states and 178 transitions. [2020-04-18 11:47:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 178 transitions. [2020-04-18 11:47:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:58,810 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:58,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 19 times [2020-04-18 11:47:58,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:58,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855613661] [2020-04-18 11:47:58,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855613661] [2020-04-18 11:47:58,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486615885] [2020-04-18 11:47:58,905 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:58,949 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:58,950 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:59,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:59,042 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:59,045 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:59,047 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 11:47:59,047 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:59,092 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:47:59,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:59,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:59,093 INFO L87 Difference]: Start difference. First operand 93 states and 178 transitions. Second operand 13 states. [2020-04-18 11:47:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:59,289 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2020-04-18 11:47:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 188 transitions. [2020-04-18 11:47:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:59,290 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:59,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:59,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 20 times [2020-04-18 11:47:59,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:59,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433861620] [2020-04-18 11:47:59,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433861620] [2020-04-18 11:47:59,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030127561] [2020-04-18 11:47:59,376 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 11:47:59,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:59,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:59,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:47:59,435 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:59,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-18 11:47:59,458 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:59,459 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:59,461 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 40 transitions. [2020-04-18 11:47:59,461 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:59,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:59,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:59,531 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:47:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:47:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:47:59,532 INFO L87 Difference]: Start difference. First operand 101 states and 188 transitions. Second operand 10 states. [2020-04-18 11:47:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:59,712 INFO L93 Difference]: Finished difference Result 119 states and 214 transitions. [2020-04-18 11:47:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 214 transitions. [2020-04-18 11:47:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:59,713 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:47:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 21 times [2020-04-18 11:47:59,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:59,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126114740] [2020-04-18 11:47:59,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126114740] [2020-04-18 11:47:59,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172080724] [2020-04-18 11:47:59,790 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 11:47:59,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:47:59,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:59,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:59,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:59,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:59,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:59,967 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:59,968 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:59,970 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:47:59,971 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:00,110 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:48:00,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:00,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:48:00,111 INFO L87 Difference]: Start difference. First operand 119 states and 214 transitions. Second operand 13 states. [2020-04-18 11:48:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:00,766 INFO L93 Difference]: Finished difference Result 136 states and 231 transitions. [2020-04-18 11:48:00,767 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 231 transitions. [2020-04-18 11:48:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:00,767 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:00,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 22 times [2020-04-18 11:48:00,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:00,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320354704] [2020-04-18 11:48:00,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320354704] [2020-04-18 11:48:00,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586861641] [2020-04-18 11:48:00,850 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:00,901 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:00,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:00,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:00,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:01,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:01,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:01,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:01,010 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:01,011 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:01,012 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 11:48:01,012 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:01,176 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:01,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:01,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1222, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:48:01,178 INFO L87 Difference]: Start difference. First operand 136 states and 231 transitions. Second operand 13 states. [2020-04-18 11:48:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:01,652 INFO L93 Difference]: Finished difference Result 152 states and 241 transitions. [2020-04-18 11:48:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 241 transitions. [2020-04-18 11:48:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:01,653 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:01,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 23 times [2020-04-18 11:48:01,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:01,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578550256] [2020-04-18 11:48:01,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:01,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578550256] [2020-04-18 11:48:01,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153545339] [2020-04-18 11:48:01,728 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 11:48:01,771 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:01,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:01,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:01,773 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:01,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:01,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:01,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:01,856 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:01,857 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:01,858 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:01,858 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:02,114 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:02,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:02,116 INFO L87 Difference]: Start difference. First operand 152 states and 241 transitions. Second operand 13 states. [2020-04-18 11:48:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:02,541 INFO L93 Difference]: Finished difference Result 164 states and 248 transitions. [2020-04-18 11:48:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2020-04-18 11:48:02,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:02,542 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1415395262] [2020-04-18 11:48:02,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:02,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:48:02,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1415395262] [2020-04-18 11:48:02,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 11:48:02,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:02,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 11:48:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=3294, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:48:02,544 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand 41 states. [2020-04-18 11:48:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:03,407 INFO L93 Difference]: Finished difference Result 287 states and 662 transitions. [2020-04-18 11:48:03,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-18 11:48:03,408 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 12 [2020-04-18 11:48:03,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:03,411 INFO L225 Difference]: With dead ends: 287 [2020-04-18 11:48:03,412 INFO L226 Difference]: Without dead ends: 268 [2020-04-18 11:48:03,413 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 192 SyntacticMatches, 25 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1498, Invalid=4508, Unknown=0, NotChecked=0, Total=6006 [2020-04-18 11:48:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-18 11:48:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 131. [2020-04-18 11:48:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-04-18 11:48:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-04-18 11:48:03,422 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 12 [2020-04-18 11:48:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:03,422 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-04-18 11:48:03,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 11:48:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-04-18 11:48:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:03,423 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:03,423 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:04,828 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 11:48:04,829 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:04,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 24 times [2020-04-18 11:48:04,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:04,830 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1132611427] [2020-04-18 11:48:04,831 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:04,831 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 11:48:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 11:48:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:04,832 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:04,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:04,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 25 times [2020-04-18 11:48:04,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:04,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875660940] [2020-04-18 11:48:04,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:04,919 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 11:48:04,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875660940] [2020-04-18 11:48:04,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2149589] [2020-04-18 11:48:04,920 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 11:48:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:04,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:04,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:05,085 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 11:48:05,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:05,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:05,086 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:05,087 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:05,088 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 11:48:05,088 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:05,191 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:48:05,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:05,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:48:05,192 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 13 states. [2020-04-18 11:48:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:05,401 INFO L93 Difference]: Finished difference Result 84 states and 169 transitions. [2020-04-18 11:48:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2020-04-18 11:48:05,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:05,402 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:48:05,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:05,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 26 times [2020-04-18 11:48:05,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:05,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130569845] [2020-04-18 11:48:05,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:05,483 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 11:48:05,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130569845] [2020-04-18 11:48:05,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472620761] [2020-04-18 11:48:05,484 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 11:48:05,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:05,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:05,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:05,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:05,626 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 11:48:05,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:05,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:05,626 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:05,627 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:05,629 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 11:48:05,629 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:05,733 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:05,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:48:05,734 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand 13 states. [2020-04-18 11:48:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:05,969 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2020-04-18 11:48:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2020-04-18 11:48:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:05,970 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:48:05,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:05,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 27 times [2020-04-18 11:48:05,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:05,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251892790] [2020-04-18 11:48:05,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:06,069 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 11:48:06,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251892790] [2020-04-18 11:48:06,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287656636] [2020-04-18 11:48:06,070 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 11:48:06,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:06,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:06,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:06,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:06,240 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 11:48:06,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:06,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:06,241 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:06,242 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:06,246 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 32 transitions. [2020-04-18 11:48:06,246 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:06,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:06,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:06,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:06,470 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:06,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:48:06,472 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand 15 states. [2020-04-18 11:48:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:06,939 INFO L93 Difference]: Finished difference Result 110 states and 201 transitions. [2020-04-18 11:48:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 201 transitions. [2020-04-18 11:48:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:06,940 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:48:06,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:06,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 28 times [2020-04-18 11:48:06,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:06,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421878645] [2020-04-18 11:48:06,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:07,059 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 11:48:07,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421878645] [2020-04-18 11:48:07,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985199282] [2020-04-18 11:48:07,060 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 11:48:07,114 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:07,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:07,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:07,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:07,234 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 11:48:07,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:07,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:07,234 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:07,235 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:07,237 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:07,237 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:07,292 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:48:07,293 INFO L87 Difference]: Start difference. First operand 110 states and 201 transitions. Second operand 13 states. [2020-04-18 11:48:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:07,529 INFO L93 Difference]: Finished difference Result 123 states and 221 transitions. [2020-04-18 11:48:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 221 transitions. [2020-04-18 11:48:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:07,529 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:07,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 29 times [2020-04-18 11:48:07,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:07,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296919305] [2020-04-18 11:48:07,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:07,597 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 11:48:07,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296919305] [2020-04-18 11:48:07,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065085212] [2020-04-18 11:48:07,597 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 11:48:07,641 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:07,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:07,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:07,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:07,721 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 11:48:07,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:07,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:07,723 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:07,723 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:07,725 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:07,725 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:07,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:07,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:07,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:07,782 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:07,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:07,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 11:48:07,784 INFO L87 Difference]: Start difference. First operand 123 states and 221 transitions. Second operand 15 states. [2020-04-18 11:48:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:08,219 INFO L93 Difference]: Finished difference Result 137 states and 239 transitions. [2020-04-18 11:48:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 239 transitions. [2020-04-18 11:48:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:08,220 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 30 times [2020-04-18 11:48:08,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:08,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040452061] [2020-04-18 11:48:08,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:08,293 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 11:48:08,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040452061] [2020-04-18 11:48:08,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055891663] [2020-04-18 11:48:08,294 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:08,333 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:08,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:08,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:08,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:08,429 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 11:48:08,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:08,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:08,430 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:08,431 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:08,433 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 11:48:08,433 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:08,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,593 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 17 times. [2020-04-18 11:48:08,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:08,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 11:48:08,595 INFO L87 Difference]: Start difference. First operand 137 states and 239 transitions. Second operand 16 states. [2020-04-18 11:48:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:09,021 INFO L93 Difference]: Finished difference Result 156 states and 263 transitions. [2020-04-18 11:48:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 263 transitions. [2020-04-18 11:48:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:09,022 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:09,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:09,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 31 times [2020-04-18 11:48:09,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:09,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226733295] [2020-04-18 11:48:09,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:09,082 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 11:48:09,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226733295] [2020-04-18 11:48:09,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133979204] [2020-04-18 11:48:09,083 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 11:48:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:09,135 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:09,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:09,220 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 11:48:09,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:09,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:09,221 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:09,221 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:09,223 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 11:48:09,223 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:09,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,377 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:48:09,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:48:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=1956, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 11:48:09,379 INFO L87 Difference]: Start difference. First operand 156 states and 263 transitions. Second operand 14 states. [2020-04-18 11:48:09,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:09,880 INFO L93 Difference]: Finished difference Result 161 states and 267 transitions. [2020-04-18 11:48:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2020-04-18 11:48:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:09,881 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:48:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:09,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 32 times [2020-04-18 11:48:09,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:09,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966755359] [2020-04-18 11:48:09,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:09,977 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 11:48:09,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966755359] [2020-04-18 11:48:09,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215233813] [2020-04-18 11:48:09,978 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 11:48:10,054 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:10,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:10,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:10,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:10,239 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 11:48:10,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:10,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:10,240 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:10,241 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:10,248 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:10,248 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:10,328 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:10,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=2621, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:10,330 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand 13 states. [2020-04-18 11:48:10,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:10,725 INFO L93 Difference]: Finished difference Result 173 states and 276 transitions. [2020-04-18 11:48:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 276 transitions. [2020-04-18 11:48:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:10,726 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:48:10,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:10,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 33 times [2020-04-18 11:48:10,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:10,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439577016] [2020-04-18 11:48:10,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:10,805 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 11:48:10,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439577016] [2020-04-18 11:48:10,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645435005] [2020-04-18 11:48:10,806 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 11:48:10,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:10,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:10,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:10,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:10,980 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 11:48:10,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:10,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:10,981 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:10,981 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:10,983 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-04-18 11:48:10,984 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:11,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:11,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:11,084 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:48:11,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:48:11,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 11:48:11,086 INFO L87 Difference]: Start difference. First operand 173 states and 276 transitions. Second operand 14 states. [2020-04-18 11:48:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:11,570 INFO L93 Difference]: Finished difference Result 184 states and 285 transitions. [2020-04-18 11:48:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 285 transitions. [2020-04-18 11:48:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:11,571 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:48:11,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:11,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 34 times [2020-04-18 11:48:11,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:11,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021690036] [2020-04-18 11:48:11,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:11,652 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 11:48:11,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021690036] [2020-04-18 11:48:11,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245752020] [2020-04-18 11:48:11,653 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 11:48:11,699 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:11,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:11,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:11,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:11,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:11,763 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 11:48:11,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:11,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:11,763 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:11,764 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:11,765 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:11,765 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:11,978 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=4356, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 11:48:11,980 INFO L87 Difference]: Start difference. First operand 184 states and 285 transitions. Second operand 13 states. [2020-04-18 11:48:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:12,598 INFO L93 Difference]: Finished difference Result 193 states and 289 transitions. [2020-04-18 11:48:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2020-04-18 11:48:12,599 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:12,600 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1132611427] [2020-04-18 11:48:12,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:12,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:48:12,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1132611427] [2020-04-18 11:48:12,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-04-18 11:48:12,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:12,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 11:48:12,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5503, Unknown=0, NotChecked=0, Total=7310 [2020-04-18 11:48:12,607 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 49 states. [2020-04-18 11:48:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:13,632 INFO L93 Difference]: Finished difference Result 283 states and 666 transitions. [2020-04-18 11:48:13,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 11:48:13,633 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 12 [2020-04-18 11:48:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:13,634 INFO L225 Difference]: With dead ends: 283 [2020-04-18 11:48:13,634 INFO L226 Difference]: Without dead ends: 263 [2020-04-18 11:48:13,635 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 265 SyntacticMatches, 24 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4836 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2594, Invalid=7912, Unknown=0, NotChecked=0, Total=10506 [2020-04-18 11:48:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-18 11:48:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 136. [2020-04-18 11:48:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-18 11:48:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2020-04-18 11:48:13,640 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 12 [2020-04-18 11:48:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:13,641 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2020-04-18 11:48:13,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-04-18 11:48:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2020-04-18 11:48:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:13,641 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:13,641 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:15,648 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 11:48:15,649 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:15,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:15,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 9 times [2020-04-18 11:48:15,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:15,651 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [255412189] [2020-04-18 11:48:15,651 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:15,651 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 11:48:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 11:48:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:15,652 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 10 times [2020-04-18 11:48:15,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:15,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755913216] [2020-04-18 11:48:15,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:15,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755913216] [2020-04-18 11:48:15,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940575077] [2020-04-18 11:48:15,763 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:15,806 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:15,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:15,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:15,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:15,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:15,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:15,913 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:15,914 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:15,915 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 11:48:15,915 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:15,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,332 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:48:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:48:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:48:16,333 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 24 states. [2020-04-18 11:48:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:16,575 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2020-04-18 11:48:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-04-18 11:48:16,576 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:16,576 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [255412189] [2020-04-18 11:48:16,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:16,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:48:16,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [255412189] [2020-04-18 11:48:16,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 11:48:16,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:16,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:48:16,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:48:16,579 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand 24 states. [2020-04-18 11:48:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:16,718 INFO L93 Difference]: Finished difference Result 199 states and 487 transitions. [2020-04-18 11:48:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 11:48:16,719 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2020-04-18 11:48:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:16,720 INFO L225 Difference]: With dead ends: 199 [2020-04-18 11:48:16,720 INFO L226 Difference]: Without dead ends: 193 [2020-04-18 11:48:16,721 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:48:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-18 11:48:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2020-04-18 11:48:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-18 11:48:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 374 transitions. [2020-04-18 11:48:16,727 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 374 transitions. Word has length 12 [2020-04-18 11:48:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:16,730 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 374 transitions. [2020-04-18 11:48:16,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 11:48:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 374 transitions. [2020-04-18 11:48:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:16,731 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:16,731 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:16,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:16,932 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:16,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 35 times [2020-04-18 11:48:16,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:16,933 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1793427600] [2020-04-18 11:48:16,933 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:16,935 INFO L259 McrAutomatonBuilder]: Finished intersection with 72 states and 153 transitions. [2020-04-18 11:48:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-04-18 11:48:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:16,936 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 36 times [2020-04-18 11:48:16,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:16,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63438964] [2020-04-18 11:48:16,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:17,009 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 11:48:17,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63438964] [2020-04-18 11:48:17,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799889844] [2020-04-18 11:48:17,010 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:17,059 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:17,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:17,060 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:17,061 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:17,186 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 11:48:17,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:17,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:17,187 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:17,188 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:17,189 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 32 transitions. [2020-04-18 11:48:17,189 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:17,325 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:17,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:17,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:48:17,326 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 15 states. [2020-04-18 11:48:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:17,603 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2020-04-18 11:48:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 223 transitions. [2020-04-18 11:48:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:17,603 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:48:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 37 times [2020-04-18 11:48:17,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:17,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243087604] [2020-04-18 11:48:17,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:17,692 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 11:48:17,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243087604] [2020-04-18 11:48:17,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844181274] [2020-04-18 11:48:17,692 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 11:48:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:17,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:17,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:17,860 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 11:48:17,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:17,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:17,860 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:17,861 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:17,862 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:48:17,863 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:17,955 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:48:17,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-04-18 11:48:17,956 INFO L87 Difference]: Start difference. First operand 107 states and 223 transitions. Second operand 15 states. [2020-04-18 11:48:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:18,330 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2020-04-18 11:48:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 240 transitions. [2020-04-18 11:48:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:18,331 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:48:18,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:18,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 38 times [2020-04-18 11:48:18,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:18,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559215013] [2020-04-18 11:48:18,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:18,417 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 11:48:18,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559215013] [2020-04-18 11:48:18,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386156583] [2020-04-18 11:48:18,418 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 11:48:18,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:18,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:18,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:18,461 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:18,596 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 11:48:18,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:18,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:18,596 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:18,597 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:18,598 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:18,599 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:18,694 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:18,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:18,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:48:18,695 INFO L87 Difference]: Start difference. First operand 119 states and 240 transitions. Second operand 15 states. [2020-04-18 11:48:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:19,052 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 11:48:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 11:48:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:19,053 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:48:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:19,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 39 times [2020-04-18 11:48:19,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:19,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450097655] [2020-04-18 11:48:19,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:19,135 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 11:48:19,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450097655] [2020-04-18 11:48:19,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92709905] [2020-04-18 11:48:19,136 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 11:48:19,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:19,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:19,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:19,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:19,267 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 11:48:19,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:19,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:19,268 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:19,269 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:19,270 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:48:19,270 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:19,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:19,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:19,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:19,482 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:19,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:19,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 11:48:19,483 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 11:48:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:20,019 INFO L93 Difference]: Finished difference Result 151 states and 280 transitions. [2020-04-18 11:48:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 280 transitions. [2020-04-18 11:48:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:20,019 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 40 times [2020-04-18 11:48:20,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:20,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114694037] [2020-04-18 11:48:20,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:20,136 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 11:48:20,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114694037] [2020-04-18 11:48:20,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029664040] [2020-04-18 11:48:20,137 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:20,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:20,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:20,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:20,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:20,283 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 11:48:20,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:20,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:20,284 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:20,284 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:20,286 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:48:20,286 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:20,340 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:48:20,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:20,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 11:48:20,341 INFO L87 Difference]: Start difference. First operand 151 states and 280 transitions. Second operand 15 states. [2020-04-18 11:48:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:20,665 INFO L93 Difference]: Finished difference Result 173 states and 321 transitions. [2020-04-18 11:48:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 321 transitions. [2020-04-18 11:48:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:20,665 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:20,666 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 41 times [2020-04-18 11:48:20,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:20,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730738184] [2020-04-18 11:48:20,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:20,776 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 11:48:20,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730738184] [2020-04-18 11:48:20,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266621566] [2020-04-18 11:48:20,776 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 11:48:20,819 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:20,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:20,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:20,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:29,087 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 11:48:29,090 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 11:48:29,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:29,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-18 11:48:29,090 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:29,092 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:29,094 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:48:29,095 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:35,296 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 11:48:35,297 INFO L87 Difference]: Start difference. First operand 173 states and 321 transitions. Second operand 15 states. [2020-04-18 11:48:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:35,677 INFO L93 Difference]: Finished difference Result 181 states and 330 transitions. [2020-04-18 11:48:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 330 transitions. [2020-04-18 11:48:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:35,678 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:35,678 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 42 times [2020-04-18 11:48:35,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:35,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370621434] [2020-04-18 11:48:35,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:35,763 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 11:48:35,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370621434] [2020-04-18 11:48:35,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686205134] [2020-04-18 11:48:35,764 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:35,804 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:35,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:35,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:35,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:35,918 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 11:48:35,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:35,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:35,919 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:35,919 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:35,921 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:48:35,921 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:35,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:35,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:35,994 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:35,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:35,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=1964, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 11:48:35,995 INFO L87 Difference]: Start difference. First operand 181 states and 330 transitions. Second operand 17 states. [2020-04-18 11:48:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:36,704 INFO L93 Difference]: Finished difference Result 204 states and 364 transitions. [2020-04-18 11:48:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 364 transitions. [2020-04-18 11:48:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:36,705 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:48:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 43 times [2020-04-18 11:48:36,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:36,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316633197] [2020-04-18 11:48:36,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:36,827 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 11:48:36,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316633197] [2020-04-18 11:48:36,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484577236] [2020-04-18 11:48:36,828 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 11:48:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:36,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:36,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:36,966 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 11:48:36,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:36,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:36,967 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:36,968 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:36,970 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:48:36,970 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:37,028 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:48:37,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:37,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=2498, Unknown=0, NotChecked=0, Total=3306 [2020-04-18 11:48:37,029 INFO L87 Difference]: Start difference. First operand 204 states and 364 transitions. Second operand 15 states. [2020-04-18 11:48:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:37,348 INFO L93 Difference]: Finished difference Result 213 states and 378 transitions. [2020-04-18 11:48:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 378 transitions. [2020-04-18 11:48:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:37,349 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:48:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:37,350 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 44 times [2020-04-18 11:48:37,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:37,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420971812] [2020-04-18 11:48:37,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:37,430 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 11:48:37,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420971812] [2020-04-18 11:48:37,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124736118] [2020-04-18 11:48:37,431 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 11:48:37,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:37,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:37,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:37,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:37,590 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 11:48:37,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:37,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:37,591 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:37,591 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:37,593 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:48:37,593 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:37,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:37,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:37,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:37,693 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:48:37,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:37,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:37,694 INFO L87 Difference]: Start difference. First operand 213 states and 378 transitions. Second operand 17 states. [2020-04-18 11:48:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:38,385 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2020-04-18 11:48:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 400 transitions. [2020-04-18 11:48:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:38,386 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:48:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:38,387 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 45 times [2020-04-18 11:48:38,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:38,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164175401] [2020-04-18 11:48:38,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:38,491 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 11:48:38,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164175401] [2020-04-18 11:48:38,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175765419] [2020-04-18 11:48:38,492 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 11:48:38,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:48:38,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:38,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:38,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:38,641 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 11:48:38,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:38,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:38,642 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:38,643 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:38,646 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 43 transitions. [2020-04-18 11:48:38,646 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:38,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:38,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:38,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:38,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:38,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:38,827 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 11:48:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:48:38,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 11:48:38,828 INFO L87 Difference]: Start difference. First operand 231 states and 400 transitions. Second operand 18 states. [2020-04-18 11:48:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:39,357 INFO L93 Difference]: Finished difference Result 265 states and 451 transitions. [2020-04-18 11:48:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 451 transitions. [2020-04-18 11:48:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:39,358 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:48:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:39,359 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 46 times [2020-04-18 11:48:39,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:39,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388749005] [2020-04-18 11:48:39,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:39,445 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 11:48:39,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388749005] [2020-04-18 11:48:39,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373562332] [2020-04-18 11:48:39,446 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 11:48:39,497 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:39,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:39,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:39,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:41,690 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 11:48:41,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:41,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:41,691 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:41,691 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:41,693 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 11:48:41,693 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:41,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:41,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:41,906 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 11:48:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:41,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1325, Invalid=4077, Unknown=0, NotChecked=0, Total=5402 [2020-04-18 11:48:41,907 INFO L87 Difference]: Start difference. First operand 265 states and 451 transitions. Second operand 16 states. [2020-04-18 11:48:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:42,791 INFO L93 Difference]: Finished difference Result 283 states and 476 transitions. [2020-04-18 11:48:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 476 transitions. [2020-04-18 11:48:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:42,792 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:48:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:42,793 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 47 times [2020-04-18 11:48:42,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:42,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451742600] [2020-04-18 11:48:42,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:42,862 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 11:48:42,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451742600] [2020-04-18 11:48:42,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390558333] [2020-04-18 11:48:42,863 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 11:48:42,901 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:42,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:42,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:42,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:43,018 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 11:48:43,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:43,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:43,019 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:43,019 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:43,021 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:48:43,021 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:43,118 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:43,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:43,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1670, Invalid=5136, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 11:48:43,120 INFO L87 Difference]: Start difference. First operand 283 states and 476 transitions. Second operand 15 states. [2020-04-18 11:48:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:43,873 INFO L93 Difference]: Finished difference Result 299 states and 494 transitions. [2020-04-18 11:48:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 494 transitions. [2020-04-18 11:48:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:43,874 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:48:43,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:43,874 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 48 times [2020-04-18 11:48:43,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:43,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597086028] [2020-04-18 11:48:43,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:43,948 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 11:48:43,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597086028] [2020-04-18 11:48:43,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885513677] [2020-04-18 11:48:43,949 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 11:48:44,003 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:44,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:44,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:44,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:44,148 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 11:48:44,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:44,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:44,150 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:44,151 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:44,155 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:48:44,155 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:44,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:44,403 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:48:44,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:44,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2167, Invalid=6575, Unknown=0, NotChecked=0, Total=8742 [2020-04-18 11:48:44,405 INFO L87 Difference]: Start difference. First operand 299 states and 494 transitions. Second operand 16 states. [2020-04-18 11:48:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:45,207 INFO L93 Difference]: Finished difference Result 308 states and 503 transitions. [2020-04-18 11:48:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 503 transitions. [2020-04-18 11:48:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:45,208 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:48:45,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:45,209 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 49 times [2020-04-18 11:48:45,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:45,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812844716] [2020-04-18 11:48:45,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:45,284 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 11:48:45,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812844716] [2020-04-18 11:48:45,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716791485] [2020-04-18 11:48:45,284 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 11:48:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:45,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:45,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:45,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:45,428 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 11:48:45,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:45,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:45,429 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:45,430 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:45,431 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:48:45,431 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:45,713 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=8559, Unknown=0, NotChecked=0, Total=11342 [2020-04-18 11:48:45,714 INFO L87 Difference]: Start difference. First operand 308 states and 503 transitions. Second operand 15 states. [2020-04-18 11:48:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:46,906 INFO L93 Difference]: Finished difference Result 330 states and 529 transitions. [2020-04-18 11:48:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 529 transitions. [2020-04-18 11:48:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:46,907 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:48:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 50 times [2020-04-18 11:48:46,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:46,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782446486] [2020-04-18 11:48:46,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:46,985 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 11:48:46,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782446486] [2020-04-18 11:48:46,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904810436] [2020-04-18 11:48:46,986 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 11:48:47,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:47,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:47,029 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:47,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:47,145 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 11:48:47,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:47,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:47,145 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:47,146 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:47,148 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:47,148 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:47,218 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3506, Invalid=11256, Unknown=0, NotChecked=0, Total=14762 [2020-04-18 11:48:47,220 INFO L87 Difference]: Start difference. First operand 330 states and 529 transitions. Second operand 15 states. [2020-04-18 11:48:47,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:47,607 INFO L93 Difference]: Finished difference Result 341 states and 536 transitions. [2020-04-18 11:48:47,607 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2020-04-18 11:48:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:47,608 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 11:48:47,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:47,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 51 times [2020-04-18 11:48:47,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:47,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858627788] [2020-04-18 11:48:47,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:47,699 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 11:48:47,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858627788] [2020-04-18 11:48:47,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193044071] [2020-04-18 11:48:47,700 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 11:48:47,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:47,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:47,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:47,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:47,840 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 11:48:47,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:47,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:47,841 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:47,842 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:47,843 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:47,843 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:47,982 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:47,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:47,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3693, Invalid=12057, Unknown=0, NotChecked=0, Total=15750 [2020-04-18 11:48:47,984 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand 15 states. [2020-04-18 11:48:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:48,588 INFO L93 Difference]: Finished difference Result 353 states and 545 transitions. [2020-04-18 11:48:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 545 transitions. [2020-04-18 11:48:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:48,589 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 11:48:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:48,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 52 times [2020-04-18 11:48:48,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:48,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402076635] [2020-04-18 11:48:48,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:48,686 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 11:48:48,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402076635] [2020-04-18 11:48:48,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167740254] [2020-04-18 11:48:48,687 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 11:48:48,729 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:48,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:48,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:48,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:48,828 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 11:48:48,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:48,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:48,828 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:48,829 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:48,830 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:48:48,830 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:48,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:49,044 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:48:49,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:49,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=13681, Unknown=0, NotChecked=0, Total=17822 [2020-04-18 11:48:49,046 INFO L87 Difference]: Start difference. First operand 353 states and 545 transitions. Second operand 16 states. [2020-04-18 11:48:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:49,809 INFO L93 Difference]: Finished difference Result 365 states and 551 transitions. [2020-04-18 11:48:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 551 transitions. [2020-04-18 11:48:49,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:49,811 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 11:48:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:49,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 53 times [2020-04-18 11:48:49,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:49,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631696057] [2020-04-18 11:48:49,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:49,882 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 11:48:49,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631696057] [2020-04-18 11:48:49,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662057416] [2020-04-18 11:48:49,883 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 11:48:49,923 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:48:49,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:49,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:49,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:50,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:50,411 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 11:48:50,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:50,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:50,412 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:50,413 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:50,414 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:50,414 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:56,215 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:56,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:56,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4914, Invalid=16539, Unknown=9, NotChecked=0, Total=21462 [2020-04-18 11:48:56,216 INFO L87 Difference]: Start difference. First operand 365 states and 551 transitions. Second operand 15 states. [2020-04-18 11:48:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:59,088 INFO L93 Difference]: Finished difference Result 386 states and 564 transitions. [2020-04-18 11:48:59,088 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 564 transitions. [2020-04-18 11:48:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:59,089 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 11:48:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:59,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 54 times [2020-04-18 11:48:59,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:59,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572104441] [2020-04-18 11:48:59,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:59,194 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 11:48:59,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572104441] [2020-04-18 11:48:59,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468645119] [2020-04-18 11:48:59,194 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 11:48:59,256 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:59,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:59,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:59,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:59,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:59,534 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 11:48:59,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:59,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:59,535 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:59,536 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:59,537 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:59,537 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:59,887 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:59,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:59,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6133, Invalid=21577, Unknown=12, NotChecked=0, Total=27722 [2020-04-18 11:48:59,888 INFO L87 Difference]: Start difference. First operand 386 states and 564 transitions. Second operand 15 states. [2020-04-18 11:49:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:00,952 INFO L93 Difference]: Finished difference Result 401 states and 577 transitions. [2020-04-18 11:49:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 577 transitions. [2020-04-18 11:49:00,953 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:00,955 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1793427600] [2020-04-18 11:49:00,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:00,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:49:00,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1793427600] [2020-04-18 11:49:00,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-04-18 11:49:00,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-04-18 11:49:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6931, Invalid=24919, Unknown=12, NotChecked=0, Total=31862 [2020-04-18 11:49:00,957 INFO L87 Difference]: Start difference. First operand 146 states and 374 transitions. Second operand 88 states. [2020-04-18 11:49:06,128 WARN L192 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-18 11:49:08,282 WARN L192 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-04-18 11:49:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:16,507 INFO L93 Difference]: Finished difference Result 504 states and 1177 transitions. [2020-04-18 11:49:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-04-18 11:49:16,508 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 13 [2020-04-18 11:49:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:16,510 INFO L225 Difference]: With dead ends: 504 [2020-04-18 11:49:16,511 INFO L226 Difference]: Without dead ends: 456 [2020-04-18 11:49:16,513 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 893 GetRequests, 573 SyntacticMatches, 75 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32343 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=12850, Invalid=47883, Unknown=29, NotChecked=0, Total=60762 [2020-04-18 11:49:16,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-04-18 11:49:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 172. [2020-04-18 11:49:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-18 11:49:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 470 transitions. [2020-04-18 11:49:16,522 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 470 transitions. Word has length 13 [2020-04-18 11:49:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:16,522 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 470 transitions. [2020-04-18 11:49:16,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-04-18 11:49:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 470 transitions. [2020-04-18 11:49:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:16,523 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:16,523 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:20,346 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 11:49:20,347 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:49:20,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 55 times [2020-04-18 11:49:20,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:20,349 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [289921906] [2020-04-18 11:49:20,350 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:20,350 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 149 transitions. [2020-04-18 11:49:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 11:49:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:20,351 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:20,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:20,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148993, now seen corresponding path program 56 times [2020-04-18 11:49:20,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:20,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100745857] [2020-04-18 11:49:20,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:20,428 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 11:49:20,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100745857] [2020-04-18 11:49:20,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058476036] [2020-04-18 11:49:20,429 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 11:49:20,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:20,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:20,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:20,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:20,597 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 11:49:20,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:20,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:20,598 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:20,598 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:20,600 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:49:20,600 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:20,730 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:49:20,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:49:20,731 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 15 states. [2020-04-18 11:49:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:21,015 INFO L93 Difference]: Finished difference Result 106 states and 221 transitions. [2020-04-18 11:49:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2020-04-18 11:49:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:21,016 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:49:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 57 times [2020-04-18 11:49:21,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:21,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118261932] [2020-04-18 11:49:21,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:21,115 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 11:49:21,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118261932] [2020-04-18 11:49:21,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157493288] [2020-04-18 11:49:21,116 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 11:49:21,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:49:21,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:21,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:21,161 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:21,254 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 11:49:21,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:21,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:21,254 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:21,255 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:21,257 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:49:21,257 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:21,360 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:49:21,361 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand 15 states. [2020-04-18 11:49:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:21,722 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2020-04-18 11:49:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 239 transitions. [2020-04-18 11:49:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:21,723 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:49:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:21,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 58 times [2020-04-18 11:49:21,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:21,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889909906] [2020-04-18 11:49:21,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:21,797 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 11:49:21,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889909906] [2020-04-18 11:49:21,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075545469] [2020-04-18 11:49:21,798 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 11:49:21,836 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:21,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:21,837 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:21,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:22,349 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 11:49:22,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:22,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:22,350 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:22,351 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:22,352 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:49:22,352 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:22,472 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:22,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 11:49:22,473 INFO L87 Difference]: Start difference. First operand 117 states and 239 transitions. Second operand 15 states. [2020-04-18 11:49:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:22,901 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 11:49:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 11:49:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:22,902 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:49:22,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:22,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 59 times [2020-04-18 11:49:22,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:22,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262698628] [2020-04-18 11:49:22,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:23,003 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 11:49:23,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262698628] [2020-04-18 11:49:23,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879414403] [2020-04-18 11:49:23,004 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 11:49:23,045 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:49:23,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:23,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:23,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:23,600 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 11:49:23,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:23,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:23,601 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:23,601 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:23,622 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:49:23,622 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:23,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:23,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:23,832 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:23,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=1708, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 11:49:23,833 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 11:49:24,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:24,445 INFO L93 Difference]: Finished difference Result 156 states and 295 transitions. [2020-04-18 11:49:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 295 transitions. [2020-04-18 11:49:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:24,446 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:49:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 60 times [2020-04-18 11:49:24,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:24,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153651382] [2020-04-18 11:49:24,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:24,529 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 11:49:24,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153651382] [2020-04-18 11:49:24,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850488276] [2020-04-18 11:49:24,530 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 11:49:24,571 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:24,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:24,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:24,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:24,675 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 11:49:24,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:24,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:24,676 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:24,676 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:24,678 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:49:24,678 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:24,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:24,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:24,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:24,794 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:24,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:24,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=2478, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 11:49:24,795 INFO L87 Difference]: Start difference. First operand 156 states and 295 transitions. Second operand 17 states. [2020-04-18 11:49:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:25,347 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2020-04-18 11:49:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 302 transitions. [2020-04-18 11:49:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:25,348 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:49:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:25,348 INFO L82 PathProgramCache]: Analyzing trace with hash 9426703, now seen corresponding path program 61 times [2020-04-18 11:49:25,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:25,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47191472] [2020-04-18 11:49:25,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:25,452 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 11:49:25,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47191472] [2020-04-18 11:49:25,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811156058] [2020-04-18 11:49:25,453 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 11:49:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:25,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:25,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:25,589 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 11:49:25,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:25,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:25,589 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:25,590 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:25,592 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:25,592 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:25,647 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:25,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:25,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3064, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 11:49:25,648 INFO L87 Difference]: Start difference. First operand 164 states and 302 transitions. Second operand 15 states. [2020-04-18 11:49:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:25,967 INFO L93 Difference]: Finished difference Result 182 states and 332 transitions. [2020-04-18 11:49:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 332 transitions. [2020-04-18 11:49:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:25,967 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:49:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 62 times [2020-04-18 11:49:25,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:25,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814397131] [2020-04-18 11:49:25,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:26,040 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 11:49:26,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814397131] [2020-04-18 11:49:26,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541276698] [2020-04-18 11:49:26,041 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 11:49:26,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:26,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:26,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:26,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:26,193 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 11:49:26,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:26,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:26,193 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:26,194 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:26,195 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:26,196 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:26,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:26,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:26,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:26,276 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:26,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:26,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:49:26,277 INFO L87 Difference]: Start difference. First operand 182 states and 332 transitions. Second operand 17 states. [2020-04-18 11:49:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:26,900 INFO L93 Difference]: Finished difference Result 201 states and 361 transitions. [2020-04-18 11:49:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 361 transitions. [2020-04-18 11:49:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:26,900 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:49:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 63 times [2020-04-18 11:49:26,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:26,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295603199] [2020-04-18 11:49:26,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:26,973 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 11:49:26,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295603199] [2020-04-18 11:49:26,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277366712] [2020-04-18 11:49:26,974 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 11:49:27,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:27,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:27,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:27,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:27,472 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 11:49:27,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:27,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:27,473 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:27,474 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:27,475 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:49:27,475 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:27,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:27,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,605 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:49:27,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:27,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=3978, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 11:49:27,607 INFO L87 Difference]: Start difference. First operand 201 states and 361 transitions. Second operand 19 states. [2020-04-18 11:49:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:28,642 INFO L93 Difference]: Finished difference Result 237 states and 410 transitions. [2020-04-18 11:49:28,642 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 410 transitions. [2020-04-18 11:49:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:28,643 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:49:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:28,643 INFO L82 PathProgramCache]: Analyzing trace with hash 646656193, now seen corresponding path program 64 times [2020-04-18 11:49:28,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:28,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567505201] [2020-04-18 11:49:28,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:28,751 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 11:49:28,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567505201] [2020-04-18 11:49:28,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377219725] [2020-04-18 11:49:28,752 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 11:49:28,795 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:28,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:28,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:28,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:28,894 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 11:49:28,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:28,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:28,895 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:28,896 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:28,899 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 39 transitions. [2020-04-18 11:49:28,899 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:28,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:28,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:29,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:29,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:29,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:29,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:29,161 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 11:49:29,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:49:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=5905, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 11:49:29,162 INFO L87 Difference]: Start difference. First operand 237 states and 410 transitions. Second operand 20 states. [2020-04-18 11:49:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:29,808 INFO L93 Difference]: Finished difference Result 268 states and 455 transitions. [2020-04-18 11:49:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 455 transitions. [2020-04-18 11:49:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:29,809 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:49:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 65 times [2020-04-18 11:49:29,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:29,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511624696] [2020-04-18 11:49:29,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:29,878 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 11:49:29,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511624696] [2020-04-18 11:49:29,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168576977] [2020-04-18 11:49:29,879 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 11:49:29,921 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:29,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:29,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:29,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:30,019 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 11:49:30,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:30,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:30,020 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:30,020 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:30,022 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:30,022 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:30,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:30,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:30,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:30,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:30,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:30,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:30,240 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:49:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:49:30,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=7200, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 11:49:30,241 INFO L87 Difference]: Start difference. First operand 268 states and 455 transitions. Second operand 18 states. [2020-04-18 11:49:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:31,048 INFO L93 Difference]: Finished difference Result 284 states and 475 transitions. [2020-04-18 11:49:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 475 transitions. [2020-04-18 11:49:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:31,049 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:49:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:31,049 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 66 times [2020-04-18 11:49:31,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:31,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219794630] [2020-04-18 11:49:31,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:31,130 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 11:49:31,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219794630] [2020-04-18 11:49:31,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25828233] [2020-04-18 11:49:31,131 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 11:49:31,173 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:31,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:31,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:31,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:31,272 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 11:49:31,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:31,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:31,273 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:31,274 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:31,275 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:49:31,275 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:31,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:31,505 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:49:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=8955, Unknown=0, NotChecked=0, Total=11556 [2020-04-18 11:49:31,506 INFO L87 Difference]: Start difference. First operand 284 states and 475 transitions. Second operand 16 states. [2020-04-18 11:49:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:32,370 INFO L93 Difference]: Finished difference Result 303 states and 492 transitions. [2020-04-18 11:49:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 492 transitions. [2020-04-18 11:49:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:32,371 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:49:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:32,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 67 times [2020-04-18 11:49:32,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:32,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308253967] [2020-04-18 11:49:32,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:32,470 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 11:49:32,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308253967] [2020-04-18 11:49:32,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795464513] [2020-04-18 11:49:32,471 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 11:49:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:32,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:32,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:32,658 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 11:49:32,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:32,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:32,659 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:32,660 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:32,661 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:49:32,662 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:32,735 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:49:32,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:32,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3020, Invalid=10552, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 11:49:32,737 INFO L87 Difference]: Start difference. First operand 303 states and 492 transitions. Second operand 15 states. [2020-04-18 11:49:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:33,399 INFO L93 Difference]: Finished difference Result 326 states and 515 transitions. [2020-04-18 11:49:33,399 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 515 transitions. [2020-04-18 11:49:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:33,400 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:49:33,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:33,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 68 times [2020-04-18 11:49:33,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:33,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472536125] [2020-04-18 11:49:33,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:33,475 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 11:49:33,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472536125] [2020-04-18 11:49:33,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288217888] [2020-04-18 11:49:33,476 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 11:49:33,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:33,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:33,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:33,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:33,602 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 11:49:33,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:33,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:33,603 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:33,604 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:33,605 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:49:33,606 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:33,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:33,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:33,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:33,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:33,779 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 11:49:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:33,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3356, Invalid=11896, Unknown=0, NotChecked=0, Total=15252 [2020-04-18 11:49:33,781 INFO L87 Difference]: Start difference. First operand 326 states and 515 transitions. Second operand 17 states. [2020-04-18 11:49:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:34,951 INFO L93 Difference]: Finished difference Result 350 states and 530 transitions. [2020-04-18 11:49:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2020-04-18 11:49:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:34,953 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:49:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 69 times [2020-04-18 11:49:34,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:34,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6787236] [2020-04-18 11:49:34,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:35,049 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 11:49:35,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6787236] [2020-04-18 11:49:35,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579487829] [2020-04-18 11:49:35,049 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 11:49:35,094 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:35,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:35,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:35,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:35,194 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 11:49:35,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:35,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:35,195 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:35,196 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:35,197 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:49:35,197 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:35,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:35,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:35,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:35,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:35,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:35,418 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:49:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:49:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3866, Invalid=14224, Unknown=0, NotChecked=0, Total=18090 [2020-04-18 11:49:35,419 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand 18 states. [2020-04-18 11:49:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:36,415 INFO L93 Difference]: Finished difference Result 358 states and 536 transitions. [2020-04-18 11:49:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 536 transitions. [2020-04-18 11:49:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:36,416 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:49:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 70 times [2020-04-18 11:49:36,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:36,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336603022] [2020-04-18 11:49:36,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:36,517 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 11:49:36,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336603022] [2020-04-18 11:49:36,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848335650] [2020-04-18 11:49:36,518 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 11:49:36,570 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:36,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:36,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:36,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:36,674 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 11:49:36,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:36,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:36,674 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:36,675 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:36,677 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:49:36,677 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:36,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:36,901 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:49:36,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4526, Invalid=16644, Unknown=0, NotChecked=0, Total=21170 [2020-04-18 11:49:36,903 INFO L87 Difference]: Start difference. First operand 358 states and 536 transitions. Second operand 16 states. [2020-04-18 11:49:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:37,827 INFO L93 Difference]: Finished difference Result 359 states and 536 transitions. [2020-04-18 11:49:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 536 transitions. [2020-04-18 11:49:37,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:37,829 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [289921906] [2020-04-18 11:49:37,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:37,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:49:37,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [289921906] [2020-04-18 11:49:37,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-04-18 11:49:37,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:37,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-04-18 11:49:37,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4967, Invalid=18289, Unknown=0, NotChecked=0, Total=23256 [2020-04-18 11:49:37,831 INFO L87 Difference]: Start difference. First operand 172 states and 470 transitions. Second operand 80 states. [2020-04-18 11:49:40,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:40,908 INFO L93 Difference]: Finished difference Result 380 states and 911 transitions. [2020-04-18 11:49:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-04-18 11:49:40,909 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 13 [2020-04-18 11:49:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:40,911 INFO L225 Difference]: With dead ends: 380 [2020-04-18 11:49:40,911 INFO L226 Difference]: Without dead ends: 362 [2020-04-18 11:49:40,913 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 424 SyntacticMatches, 61 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20813 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=8391, Invalid=29439, Unknown=0, NotChecked=0, Total=37830 [2020-04-18 11:49:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-04-18 11:49:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 177. [2020-04-18 11:49:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-04-18 11:49:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2020-04-18 11:49:40,920 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 13 [2020-04-18 11:49:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:40,921 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2020-04-18 11:49:40,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-04-18 11:49:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2020-04-18 11:49:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:40,921 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:40,921 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:43,937 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 11:49:43,939 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:49:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:43,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 11 times [2020-04-18 11:49:43,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:43,940 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [627701041] [2020-04-18 11:49:43,941 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:43,941 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 41 transitions. [2020-04-18 11:49:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-04-18 11:49:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:43,942 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:43,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 12 times [2020-04-18 11:49:43,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:43,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292451731] [2020-04-18 11:49:43,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 11:49:44,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292451731] [2020-04-18 11:49:44,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213913279] [2020-04-18 11:49:44,037 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 11:49:44,080 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 11:49:44,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:44,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:49:44,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:44,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:44,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-18 11:49:44,125 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:44,126 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:44,128 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:49:44,128 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:44,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:44,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:44,275 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:49:44,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:44,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:49:44,276 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 16 states. [2020-04-18 11:49:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:44,638 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2020-04-18 11:49:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2020-04-18 11:49:44,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:44,639 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [627701041] [2020-04-18 11:49:44,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:44,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 11:49:44,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [627701041] [2020-04-18 11:49:44,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:49:44,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:44,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:44,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:49:44,640 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 16 states. [2020-04-18 11:49:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:45,208 INFO L93 Difference]: Finished difference Result 362 states and 929 transitions. [2020-04-18 11:49:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-18 11:49:45,209 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-18 11:49:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:45,212 INFO L225 Difference]: With dead ends: 362 [2020-04-18 11:49:45,212 INFO L226 Difference]: Without dead ends: 313 [2020-04-18 11:49:45,213 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1483, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 11:49:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-04-18 11:49:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 250. [2020-04-18 11:49:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-04-18 11:49:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 701 transitions. [2020-04-18 11:49:45,220 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 701 transitions. Word has length 13 [2020-04-18 11:49:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:45,221 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 701 transitions. [2020-04-18 11:49:45,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:49:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 701 transitions. [2020-04-18 11:49:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:45,221 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:45,221 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:45,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:45,425 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:49:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:45,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 71 times [2020-04-18 11:49:45,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:45,426 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1532785413] [2020-04-18 11:49:45,427 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:45,428 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 186 transitions. [2020-04-18 11:49:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 11:49:45,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:45,429 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:45,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 72 times [2020-04-18 11:49:45,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:45,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727768498] [2020-04-18 11:49:45,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:45,522 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 11:49:45,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727768498] [2020-04-18 11:49:45,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852616499] [2020-04-18 11:49:45,523 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:45,566 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:45,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:45,567 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:45,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:45,686 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 11:49:45,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:45,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:45,686 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:45,687 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:45,689 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:49:45,689 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:45,859 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:49:45,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:45,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:49:45,860 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 17 states. [2020-04-18 11:49:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:46,244 INFO L93 Difference]: Finished difference Result 130 states and 277 transitions. [2020-04-18 11:49:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 277 transitions. [2020-04-18 11:49:46,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:46,245 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:49:46,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:46,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 73 times [2020-04-18 11:49:46,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:46,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526610875] [2020-04-18 11:49:46,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:46,331 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 11:49:46,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526610875] [2020-04-18 11:49:46,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861345942] [2020-04-18 11:49:46,332 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:46,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:46,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:48,157 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 11:49:48,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:48,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:48,158 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:48,159 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:48,161 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 11:49:48,162 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:48,779 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=434, Unknown=1, NotChecked=0, Total=650 [2020-04-18 11:49:48,780 INFO L87 Difference]: Start difference. First operand 130 states and 277 transitions. Second operand 17 states. [2020-04-18 11:49:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:49,234 INFO L93 Difference]: Finished difference Result 146 states and 302 transitions. [2020-04-18 11:49:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 302 transitions. [2020-04-18 11:49:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:49,235 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:49:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 74 times [2020-04-18 11:49:49,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:49,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134808576] [2020-04-18 11:49:49,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:49,345 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 11:49:49,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134808576] [2020-04-18 11:49:49,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722747153] [2020-04-18 11:49:49,346 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:49,387 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:49,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:49,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:49,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:50,999 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 11:49:50,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:50,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:49:50,999 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:51,000 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:51,002 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:49:51,002 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:53,503 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:49:53,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:53,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=844, Unknown=2, NotChecked=0, Total=1260 [2020-04-18 11:49:53,504 INFO L87 Difference]: Start difference. First operand 146 states and 302 transitions. Second operand 17 states. [2020-04-18 11:49:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:54,673 INFO L93 Difference]: Finished difference Result 156 states and 315 transitions. [2020-04-18 11:49:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 315 transitions. [2020-04-18 11:49:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:54,674 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:49:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 75 times [2020-04-18 11:49:54,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:54,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122091520] [2020-04-18 11:49:54,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:54,773 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 11:49:54,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122091520] [2020-04-18 11:49:54,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777675620] [2020-04-18 11:49:54,774 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:54,817 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:54,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:54,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:54,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:54,937 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 11:49:54,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:54,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:54,937 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:54,938 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:54,940 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:54,940 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:56,863 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:56,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=1495, Unknown=5, NotChecked=0, Total=2162 [2020-04-18 11:49:56,864 INFO L87 Difference]: Start difference. First operand 156 states and 315 transitions. Second operand 17 states. [2020-04-18 11:49:58,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:58,569 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2020-04-18 11:49:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 330 transitions. [2020-04-18 11:49:58,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:58,569 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:49:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 76 times [2020-04-18 11:49:58,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:58,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220190599] [2020-04-18 11:49:58,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:58,666 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 11:49:58,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220190599] [2020-04-18 11:49:58,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309688444] [2020-04-18 11:49:58,667 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:58,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:58,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:58,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:58,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:58,820 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 11:49:58,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:58,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:58,821 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:58,822 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:58,823 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 11:49:58,824 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:58,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:59,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:59,734 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:59,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1119, Invalid=3033, Unknown=8, NotChecked=0, Total=4160 [2020-04-18 11:49:59,735 INFO L87 Difference]: Start difference. First operand 169 states and 330 transitions. Second operand 19 states. [2020-04-18 11:50:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:01,493 INFO L93 Difference]: Finished difference Result 207 states and 383 transitions. [2020-04-18 11:50:01,493 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 383 transitions. [2020-04-18 11:50:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:01,494 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:50:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:01,494 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 77 times [2020-04-18 11:50:01,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:01,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36208880] [2020-04-18 11:50:01,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:01,646 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 11:50:01,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36208880] [2020-04-18 11:50:01,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735461708] [2020-04-18 11:50:01,647 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:01,683 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:50:01,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:01,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:01,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:01,808 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 11:50:01,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:01,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:01,809 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:01,810 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:01,812 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 11:50:01,812 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:01,890 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 14 times. [2020-04-18 11:50:01,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:01,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1438, Invalid=3954, Unknown=10, NotChecked=0, Total=5402 [2020-04-18 11:50:01,891 INFO L87 Difference]: Start difference. First operand 207 states and 383 transitions. Second operand 17 states. [2020-04-18 11:50:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:02,285 INFO L93 Difference]: Finished difference Result 238 states and 445 transitions. [2020-04-18 11:50:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 445 transitions. [2020-04-18 11:50:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:02,285 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:50:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:02,286 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 78 times [2020-04-18 11:50:02,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:02,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661090277] [2020-04-18 11:50:02,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:02,387 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 11:50:02,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661090277] [2020-04-18 11:50:02,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890534488] [2020-04-18 11:50:02,388 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:02,429 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:02,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:02,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:02,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:02,812 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 11:50:02,830 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 11:50:02,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:02,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:02,831 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:02,832 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:02,834 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:50:02,834 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:02,895 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:50:02,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1438, Invalid=3954, Unknown=10, NotChecked=0, Total=5402 [2020-04-18 11:50:02,896 INFO L87 Difference]: Start difference. First operand 238 states and 445 transitions. Second operand 17 states. [2020-04-18 11:50:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:03,398 INFO L93 Difference]: Finished difference Result 250 states and 462 transitions. [2020-04-18 11:50:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 462 transitions. [2020-04-18 11:50:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:03,399 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:50:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 79 times [2020-04-18 11:50:03,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:03,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010567202] [2020-04-18 11:50:03,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:03,495 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 11:50:03,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010567202] [2020-04-18 11:50:03,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119181382] [2020-04-18 11:50:03,496 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:03,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:03,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:06,387 WARN L192 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-18 11:50:06,388 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 11:50:06,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:06,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:50:06,389 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:06,390 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:06,392 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 11:50:06,392 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:08,236 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1438, Invalid=3954, Unknown=10, NotChecked=0, Total=5402 [2020-04-18 11:50:08,236 INFO L87 Difference]: Start difference. First operand 250 states and 462 transitions. Second operand 17 states. [2020-04-18 11:50:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:08,886 INFO L93 Difference]: Finished difference Result 257 states and 469 transitions. [2020-04-18 11:50:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 469 transitions. [2020-04-18 11:50:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:08,887 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:50:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 80 times [2020-04-18 11:50:08,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:08,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012885687] [2020-04-18 11:50:08,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:09,007 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 11:50:09,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012885687] [2020-04-18 11:50:09,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586342645] [2020-04-18 11:50:09,008 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:09,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:09,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:09,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:09,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:09,169 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 11:50:09,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:09,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:09,170 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:09,171 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:09,172 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 11:50:09,172 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:09,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:09,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:09,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:09,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:09,241 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:09,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1513, Invalid=4329, Unknown=10, NotChecked=0, Total=5852 [2020-04-18 11:50:09,242 INFO L87 Difference]: Start difference. First operand 257 states and 469 transitions. Second operand 19 states. [2020-04-18 11:50:10,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:10,287 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2020-04-18 11:50:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 527 transitions. [2020-04-18 11:50:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:10,288 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:50:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:10,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 81 times [2020-04-18 11:50:10,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:10,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674615083] [2020-04-18 11:50:10,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:10,406 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 11:50:10,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674615083] [2020-04-18 11:50:10,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998310163] [2020-04-18 11:50:10,406 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:10,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:50:10,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:10,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:10,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:10,596 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 11:50:10,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:10,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:10,597 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:10,598 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:10,600 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2020-04-18 11:50:10,600 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:10,666 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 18 times. [2020-04-18 11:50:10,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1699, Invalid=5263, Unknown=10, NotChecked=0, Total=6972 [2020-04-18 11:50:10,667 INFO L87 Difference]: Start difference. First operand 293 states and 527 transitions. Second operand 17 states. [2020-04-18 11:50:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:11,105 INFO L93 Difference]: Finished difference Result 307 states and 552 transitions. [2020-04-18 11:50:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 552 transitions. [2020-04-18 11:50:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:11,106 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:50:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 82 times [2020-04-18 11:50:11,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:11,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60815725] [2020-04-18 11:50:11,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:11,195 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 11:50:11,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60815725] [2020-04-18 11:50:11,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603491676] [2020-04-18 11:50:11,196 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:11,240 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:11,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:11,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:11,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:11,447 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 11:50:11,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:11,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:11,448 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:11,448 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:11,450 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:50:11,451 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:12,337 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:50:12,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:12,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1699, Invalid=5263, Unknown=10, NotChecked=0, Total=6972 [2020-04-18 11:50:12,337 INFO L87 Difference]: Start difference. First operand 307 states and 552 transitions. Second operand 17 states. [2020-04-18 11:50:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:12,886 INFO L93 Difference]: Finished difference Result 315 states and 561 transitions. [2020-04-18 11:50:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 561 transitions. [2020-04-18 11:50:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:12,887 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:50:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:12,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 83 times [2020-04-18 11:50:12,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:12,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49131242] [2020-04-18 11:50:12,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:12,970 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 11:50:12,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49131242] [2020-04-18 11:50:12,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236111563] [2020-04-18 11:50:12,971 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:13,016 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:50:13,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:13,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:13,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:13,761 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 11:50:13,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:13,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:50:13,762 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:13,763 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:13,765 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:50:13,765 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:13,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:13,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:18,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:18,500 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:50:18,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:50:18,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1823, Invalid=5644, Unknown=15, NotChecked=0, Total=7482 [2020-04-18 11:50:18,502 INFO L87 Difference]: Start difference. First operand 315 states and 561 transitions. Second operand 20 states. [2020-04-18 11:50:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:24,387 INFO L93 Difference]: Finished difference Result 349 states and 610 transitions. [2020-04-18 11:50:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 610 transitions. [2020-04-18 11:50:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:24,388 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:50:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 84 times [2020-04-18 11:50:24,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:24,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517556017] [2020-04-18 11:50:24,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:24,487 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 11:50:24,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517556017] [2020-04-18 11:50:24,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673627085] [2020-04-18 11:50:24,488 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:24,526 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:24,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:24,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:24,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:24,650 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 11:50:24,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:24,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:24,651 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:24,652 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:24,654 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 11:50:24,654 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:24,729 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 11:50:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:24,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2004, Invalid=6537, Unknown=15, NotChecked=0, Total=8556 [2020-04-18 11:50:24,730 INFO L87 Difference]: Start difference. First operand 349 states and 610 transitions. Second operand 17 states. [2020-04-18 11:50:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:25,209 INFO L93 Difference]: Finished difference Result 358 states and 624 transitions. [2020-04-18 11:50:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 624 transitions. [2020-04-18 11:50:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:25,210 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:50:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 85 times [2020-04-18 11:50:25,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:25,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327677214] [2020-04-18 11:50:25,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:25,290 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 11:50:25,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327677214] [2020-04-18 11:50:25,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892154995] [2020-04-18 11:50:25,291 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:25,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:25,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:25,497 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 11:50:25,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:25,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:25,498 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:25,500 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:25,502 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 11:50:25,502 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:25,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:26,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:26,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:26,260 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 11:50:26,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:26,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=6830, Unknown=15, NotChecked=0, Total=8930 [2020-04-18 11:50:26,262 INFO L87 Difference]: Start difference. First operand 358 states and 624 transitions. Second operand 19 states. [2020-04-18 11:50:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:27,564 INFO L93 Difference]: Finished difference Result 382 states and 653 transitions. [2020-04-18 11:50:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 653 transitions. [2020-04-18 11:50:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:27,565 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:50:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:27,566 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 86 times [2020-04-18 11:50:27,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:27,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441196841] [2020-04-18 11:50:27,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:27,647 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 11:50:27,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441196841] [2020-04-18 11:50:27,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828753874] [2020-04-18 11:50:27,648 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:27,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:27,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:27,715 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:27,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:27,846 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 11:50:27,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:27,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:27,847 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:27,848 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:27,850 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 50 transitions. [2020-04-18 11:50:27,850 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:27,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:27,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:27,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:28,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:28,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:28,042 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 29 times. [2020-04-18 11:50:28,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:50:28,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2400, Invalid=8091, Unknown=15, NotChecked=0, Total=10506 [2020-04-18 11:50:28,043 INFO L87 Difference]: Start difference. First operand 382 states and 653 transitions. Second operand 20 states. [2020-04-18 11:50:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:28,758 INFO L93 Difference]: Finished difference Result 423 states and 717 transitions. [2020-04-18 11:50:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 717 transitions. [2020-04-18 11:50:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:28,759 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 11:50:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:28,760 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 87 times [2020-04-18 11:50:28,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:28,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648018907] [2020-04-18 11:50:28,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:28,828 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 11:50:28,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648018907] [2020-04-18 11:50:28,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782845887] [2020-04-18 11:50:28,829 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:28,873 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:50:28,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:28,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 11:50:28,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:28,948 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 11:50:28,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:28,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-04-18 11:50:28,949 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:28,949 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:28,952 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 40 transitions. [2020-04-18 11:50:28,952 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:29,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:29,177 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:29,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:50:29,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2723, Invalid=9694, Unknown=15, NotChecked=0, Total=12432 [2020-04-18 11:50:29,179 INFO L87 Difference]: Start difference. First operand 423 states and 717 transitions. Second operand 15 states. [2020-04-18 11:50:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:30,081 INFO L93 Difference]: Finished difference Result 453 states and 767 transitions. [2020-04-18 11:50:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 767 transitions. [2020-04-18 11:50:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:30,082 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 11:50:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 88 times [2020-04-18 11:50:30,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:30,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7262674] [2020-04-18 11:50:30,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:30,193 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 11:50:30,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7262674] [2020-04-18 11:50:30,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540782899] [2020-04-18 11:50:30,194 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:30,244 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:30,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:30,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:30,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:31,428 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 11:50:31,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:31,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:50:31,429 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:31,429 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:31,431 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:50:31,431 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:32,549 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:50:32,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:32,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3289, Invalid=11702, Unknown=15, NotChecked=0, Total=15006 [2020-04-18 11:50:32,550 INFO L87 Difference]: Start difference. First operand 453 states and 767 transitions. Second operand 17 states. [2020-04-18 11:50:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:34,385 INFO L93 Difference]: Finished difference Result 475 states and 794 transitions. [2020-04-18 11:50:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 794 transitions. [2020-04-18 11:50:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:34,386 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 11:50:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 89 times [2020-04-18 11:50:34,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:34,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504059574] [2020-04-18 11:50:34,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:34,456 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 11:50:34,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504059574] [2020-04-18 11:50:34,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040907313] [2020-04-18 11:50:34,457 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:34,499 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:50:34,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:34,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:34,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:34,683 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 11:50:34,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:34,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:34,684 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:34,684 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:34,687 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 11:50:34,687 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:34,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:35,153 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 11:50:35,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:50:35,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3963, Invalid=13843, Unknown=16, NotChecked=0, Total=17822 [2020-04-18 11:50:35,154 INFO L87 Difference]: Start difference. First operand 475 states and 794 transitions. Second operand 18 states. [2020-04-18 11:50:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:36,842 INFO L93 Difference]: Finished difference Result 495 states and 823 transitions. [2020-04-18 11:50:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 823 transitions. [2020-04-18 11:50:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:36,843 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 11:50:36,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:36,843 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 90 times [2020-04-18 11:50:36,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:36,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001517033] [2020-04-18 11:50:36,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:36,917 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 11:50:36,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001517033] [2020-04-18 11:50:36,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231492523] [2020-04-18 11:50:36,918 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:36,960 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:36,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:36,961 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:36,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:37,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:37,129 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 11:50:37,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:37,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:37,129 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:37,130 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:37,132 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:50:37,133 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:37,974 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:50:37,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:37,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4938, Invalid=17097, Unknown=17, NotChecked=0, Total=22052 [2020-04-18 11:50:37,976 INFO L87 Difference]: Start difference. First operand 495 states and 823 transitions. Second operand 17 states. [2020-04-18 11:50:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:40,482 INFO L93 Difference]: Finished difference Result 540 states and 879 transitions. [2020-04-18 11:50:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 879 transitions. [2020-04-18 11:50:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:40,484 INFO L105 Mcr]: ---- MCR iteration 19 ---- [2020-04-18 11:50:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 91 times [2020-04-18 11:50:40,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:40,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978910148] [2020-04-18 11:50:40,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:40,608 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 11:50:40,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978910148] [2020-04-18 11:50:40,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939887747] [2020-04-18 11:50:40,608 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:40,676 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:40,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:40,871 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 11:50:40,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:40,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:40,872 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:40,874 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:40,877 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:50:40,877 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:41,070 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:50:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:41,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5934, Invalid=21109, Unknown=17, NotChecked=0, Total=27060 [2020-04-18 11:50:41,072 INFO L87 Difference]: Start difference. First operand 540 states and 879 transitions. Second operand 17 states. [2020-04-18 11:50:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:42,507 INFO L93 Difference]: Finished difference Result 554 states and 889 transitions. [2020-04-18 11:50:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 889 transitions. [2020-04-18 11:50:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:42,508 INFO L105 Mcr]: ---- MCR iteration 20 ---- [2020-04-18 11:50:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:42,509 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 92 times [2020-04-18 11:50:42,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:42,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650050551] [2020-04-18 11:50:42,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:42,580 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 11:50:42,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650050551] [2020-04-18 11:50:42,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378447970] [2020-04-18 11:50:42,581 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:42,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:42,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:42,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:42,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:42,728 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 11:50:42,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:42,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:42,728 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:42,730 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:42,731 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:50:42,731 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:42,977 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:50:42,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:42,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6929, Invalid=24560, Unknown=17, NotChecked=0, Total=31506 [2020-04-18 11:50:42,979 INFO L87 Difference]: Start difference. First operand 554 states and 889 transitions. Second operand 17 states. [2020-04-18 11:50:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:45,359 INFO L93 Difference]: Finished difference Result 573 states and 908 transitions. [2020-04-18 11:50:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 908 transitions. [2020-04-18 11:50:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:45,360 INFO L105 Mcr]: ---- MCR iteration 21 ---- [2020-04-18 11:50:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:45,360 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 93 times [2020-04-18 11:50:45,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:45,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302783410] [2020-04-18 11:50:45,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:45,446 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 11:50:45,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302783410] [2020-04-18 11:50:45,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631495228] [2020-04-18 11:50:45,447 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:45,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:50:45,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:45,490 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-18 11:50:45,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:45,581 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 11:50:45,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:45,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-04-18 11:50:45,582 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:45,583 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:45,585 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 11:50:45,585 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:45,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:45,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:45,982 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:50:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8254, Invalid=30340, Unknown=18, NotChecked=0, Total=38612 [2020-04-18 11:50:45,984 INFO L87 Difference]: Start difference. First operand 573 states and 908 transitions. Second operand 17 states. [2020-04-18 11:50:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:47,349 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-04-18 11:50:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 935 transitions. [2020-04-18 11:50:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:47,350 INFO L105 Mcr]: ---- MCR iteration 22 ---- [2020-04-18 11:50:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:47,351 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 94 times [2020-04-18 11:50:47,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:47,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768858] [2020-04-18 11:50:47,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:47,431 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 11:50:47,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768858] [2020-04-18 11:50:47,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994433004] [2020-04-18 11:50:47,432 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:47,475 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:47,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:47,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:47,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:49,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:49,129 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 11:50:49,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:49,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:49,129 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:49,130 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:49,132 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:50:49,132 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:54,818 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:50:54,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:54,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10196, Invalid=36219, Unknown=25, NotChecked=0, Total=46440 [2020-04-18 11:50:54,821 INFO L87 Difference]: Start difference. First operand 605 states and 935 transitions. Second operand 17 states. [2020-04-18 11:50:57,269 WARN L192 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 11:51:03,519 WARN L192 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 11:51:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:05,269 INFO L93 Difference]: Finished difference Result 619 states and 947 transitions. [2020-04-18 11:51:05,269 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 947 transitions. [2020-04-18 11:51:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:05,270 INFO L105 Mcr]: ---- MCR iteration 23 ---- [2020-04-18 11:51:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:05,271 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 95 times [2020-04-18 11:51:05,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:05,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055430863] [2020-04-18 11:51:05,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:05,372 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 11:51:05,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055430863] [2020-04-18 11:51:05,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278862891] [2020-04-18 11:51:05,373 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:05,428 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:51:05,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:05,429 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:05,430 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:05,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:05,607 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 11:51:05,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:05,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:05,608 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:05,609 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:05,612 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:51:05,612 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:07,111 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:51:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:07,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12225, Invalid=44150, Unknown=31, NotChecked=0, Total=56406 [2020-04-18 11:51:07,114 INFO L87 Difference]: Start difference. First operand 619 states and 947 transitions. Second operand 17 states. [2020-04-18 11:51:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:21,176 INFO L93 Difference]: Finished difference Result 644 states and 968 transitions. [2020-04-18 11:51:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 968 transitions. [2020-04-18 11:51:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:21,178 INFO L105 Mcr]: ---- MCR iteration 24 ---- [2020-04-18 11:51:21,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:21,178 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 96 times [2020-04-18 11:51:21,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:21,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602100063] [2020-04-18 11:51:21,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:21,254 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 11:51:21,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602100063] [2020-04-18 11:51:21,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201502959] [2020-04-18 11:51:21,254 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:21,298 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 11:51:21,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:21,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:21,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:21,437 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 11:51:21,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:21,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:21,438 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:21,439 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:21,440 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:51:21,440 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:21,597 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:51:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:21,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14799, Invalid=54588, Unknown=45, NotChecked=0, Total=69432 [2020-04-18 11:51:21,601 INFO L87 Difference]: Start difference. First operand 644 states and 968 transitions. Second operand 17 states. [2020-04-18 11:51:22,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:22,134 INFO L93 Difference]: Finished difference Result 658 states and 979 transitions. [2020-04-18 11:51:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 979 transitions. [2020-04-18 11:51:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:22,135 INFO L105 Mcr]: ---- MCR iteration 25 ---- [2020-04-18 11:51:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 97 times [2020-04-18 11:51:22,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:22,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961946440] [2020-04-18 11:51:22,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:22,205 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 11:51:22,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961946440] [2020-04-18 11:51:22,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586649815] [2020-04-18 11:51:22,206 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:22,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:22,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:22,364 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 11:51:22,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:22,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:22,365 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:22,366 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:22,368 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:51:22,368 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:22,629 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:51:22,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:22,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15124, Invalid=56387, Unknown=45, NotChecked=0, Total=71556 [2020-04-18 11:51:22,632 INFO L87 Difference]: Start difference. First operand 658 states and 979 transitions. Second operand 17 states. [2020-04-18 11:51:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:23,849 INFO L93 Difference]: Finished difference Result 667 states and 985 transitions. [2020-04-18 11:51:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 985 transitions. [2020-04-18 11:51:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:23,850 INFO L105 Mcr]: ---- MCR iteration 26 ---- [2020-04-18 11:51:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:23,850 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 98 times [2020-04-18 11:51:23,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:23,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096051827] [2020-04-18 11:51:23,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:23,931 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 11:51:23,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096051827] [2020-04-18 11:51:23,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954461597] [2020-04-18 11:51:23,932 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:23,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:51:23,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:23,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:23,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:24,084 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 11:51:24,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:24,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:24,085 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:24,086 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:24,090 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:51:24,090 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:24,393 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:51:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:24,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16150, Invalid=60811, Unknown=45, NotChecked=0, Total=77006 [2020-04-18 11:51:24,396 INFO L87 Difference]: Start difference. First operand 667 states and 985 transitions. Second operand 17 states. [2020-04-18 11:51:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:26,292 INFO L93 Difference]: Finished difference Result 675 states and 991 transitions. [2020-04-18 11:51:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 991 transitions. [2020-04-18 11:51:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:26,294 INFO L105 Mcr]: ---- MCR iteration 27 ---- [2020-04-18 11:51:26,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 99 times [2020-04-18 11:51:26,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:26,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784460382] [2020-04-18 11:51:26,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:26,386 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 11:51:26,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784460382] [2020-04-18 11:51:26,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572260970] [2020-04-18 11:51:26,387 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:26,429 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 11:51:26,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:26,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:26,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:26,562 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 11:51:26,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:26,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:26,562 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:26,563 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:26,565 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 24 transitions. [2020-04-18 11:51:26,566 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:26,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:26,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:27,857 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:51:27,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:51:27,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17525, Invalid=66817, Unknown=48, NotChecked=0, Total=84390 [2020-04-18 11:51:27,861 INFO L87 Difference]: Start difference. First operand 675 states and 991 transitions. Second operand 18 states. [2020-04-18 11:51:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:30,139 INFO L93 Difference]: Finished difference Result 689 states and 999 transitions. [2020-04-18 11:51:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 999 transitions. [2020-04-18 11:51:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:30,139 INFO L105 Mcr]: ---- MCR iteration 28 ---- [2020-04-18 11:51:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:30,140 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 100 times [2020-04-18 11:51:30,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:30,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488912426] [2020-04-18 11:51:30,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:30,217 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 11:51:30,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488912426] [2020-04-18 11:51:30,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854958911] [2020-04-18 11:51:30,218 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:30,260 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:51:30,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:30,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:30,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:30,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:30,610 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 11:51:30,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:30,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:30,611 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:30,612 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:30,614 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:51:30,614 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:36,223 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:51:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19452, Invalid=75047, Unknown=57, NotChecked=0, Total=94556 [2020-04-18 11:51:36,227 INFO L87 Difference]: Start difference. First operand 689 states and 999 transitions. Second operand 17 states. [2020-04-18 11:51:38,300 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 11:51:46,407 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-04-18 11:51:47,801 WARN L192 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-04-18 11:51:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:52,158 INFO L93 Difference]: Finished difference Result 698 states and 1003 transitions. [2020-04-18 11:51:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1003 transitions. [2020-04-18 11:51:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:52,159 INFO L105 Mcr]: ---- MCR iteration 29 ---- [2020-04-18 11:51:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 101 times [2020-04-18 11:51:52,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:52,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820585900] [2020-04-18 11:51:52,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:52,237 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 11:51:52,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820585900] [2020-04-18 11:51:52,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689226447] [2020-04-18 11:51:52,238 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:52,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:51:52,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:52,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:52,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:52,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:52,867 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 11:51:52,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:52,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:52,868 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:52,869 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:52,870 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:51:52,870 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:09,989 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:52:09,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:52:09,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22296, Invalid=87502, Unknown=94, NotChecked=0, Total=109892 [2020-04-18 11:52:09,993 INFO L87 Difference]: Start difference. First operand 698 states and 1003 transitions. Second operand 17 states. [2020-04-18 11:52:11,880 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown