/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 07:31:42,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 07:31:42,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 07:31:42,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 07:31:42,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 07:31:42,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 07:31:42,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 07:31:42,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 07:31:42,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 07:31:42,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 07:31:42,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 07:31:42,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 07:31:42,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 07:31:42,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 07:31:42,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 07:31:42,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 07:31:42,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 07:31:42,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 07:31:42,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 07:31:42,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 07:31:42,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 07:31:42,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 07:31:42,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 07:31:42,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 07:31:42,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 07:31:42,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 07:31:42,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 07:31:42,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 07:31:42,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 07:31:42,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 07:31:42,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 07:31:42,855 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 07:31:42,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 07:31:42,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 07:31:42,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 07:31:42,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 07:31:42,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 07:31:42,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 07:31:42,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 07:31:42,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 07:31:42,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 07:31:42,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf [2020-04-18 07:31:42,896 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 07:31:42,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 07:31:42,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 07:31:42,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 07:31:42,901 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 07:31:42,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 07:31:42,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 07:31:42,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 07:31:42,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 07:31:42,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 07:31:42,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 07:31:42,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 07:31:42,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 07:31:42,904 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 07:31:42,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 07:31:42,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 07:31:42,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 07:31:42,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 07:31:42,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 07:31:42,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 07:31:42,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 07:31:42,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:31:42,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 07:31:42,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 07:31:42,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 07:31:42,906 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 07:31:42,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 07:31:42,907 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 07:31:42,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 07:31:42,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 07:31:43,219 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 07:31:43,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 07:31:43,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 07:31:43,245 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 07:31:43,245 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 07:31:43,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-18 07:31:43,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa1ec4572/fb6c52481d6348f08c1c12b465c8f29b/FLAG31182666a [2020-04-18 07:31:43,871 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 07:31:43,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-18 07:31:43,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa1ec4572/fb6c52481d6348f08c1c12b465c8f29b/FLAG31182666a [2020-04-18 07:31:44,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa1ec4572/fb6c52481d6348f08c1c12b465c8f29b [2020-04-18 07:31:44,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 07:31:44,225 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 07:31:44,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:44,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 07:31:44,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 07:31:44,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3550ea4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44, skipping insertion in model container [2020-04-18 07:31:44,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 07:31:44,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 07:31:44,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:44,808 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 07:31:44,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:44,959 INFO L208 MainTranslator]: Completed translation [2020-04-18 07:31:44,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44 WrapperNode [2020-04-18 07:31:44,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:44,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:44,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 07:31:44,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 07:31:44,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:45,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:45,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 07:31:45,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 07:31:45,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:45,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:45,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:45,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:45,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:45,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:45,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:45,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 07:31:45,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 07:31:45,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 07:31:45,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:31:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 07:31:45,111 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 07:31:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 07:31:45,111 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 07:31:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 07:31:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 07:31:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 07:31:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 07:31:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 07:31:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 07:31:45,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 07:31:45,114 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 07:31:45,475 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 07:31:45,475 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 07:31:45,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:45 BoogieIcfgContainer [2020-04-18 07:31:45,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 07:31:45,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 07:31:45,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 07:31:45,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 07:31:45,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 07:31:44" (1/3) ... [2020-04-18 07:31:45,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc760df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:45, skipping insertion in model container [2020-04-18 07:31:45,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44" (2/3) ... [2020-04-18 07:31:45,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bc760df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:45, skipping insertion in model container [2020-04-18 07:31:45,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:45" (3/3) ... [2020-04-18 07:31:45,488 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-04-18 07:31:45,499 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 07:31:45,500 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 07:31:45,506 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 07:31:45,507 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 07:31:45,535 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,535 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,536 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,536 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,537 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,537 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,537 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,538 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,538 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,538 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,539 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,539 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,539 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,539 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,540 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,540 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,541 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,541 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,541 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,541 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,542 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,542 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,542 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,543 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,543 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,543 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,544 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,544 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,544 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,544 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,548 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,549 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,549 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,549 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,549 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,550 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,555 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,556 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,556 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,556 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,557 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,557 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,579 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 07:31:45,599 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 07:31:45,599 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 07:31:45,599 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 07:31:45,599 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 07:31:45,600 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 07:31:45,600 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 07:31:45,600 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 07:31:45,600 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 07:31:45,615 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,617 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,659 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 07:31:45,659 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:31:45,671 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 07:31:45,676 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,705 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 07:31:45,705 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:31:45,706 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 07:31:45,708 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-18 07:31:45,709 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-18 07:31:46,887 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-18 07:31:46,989 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-18 07:31:46,990 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-18 07:31:46,994 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-18 07:31:47,008 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 07:31:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:31:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:31:47,022 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:47,022 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 07:31:47,023 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-18 07:31:47,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:47,037 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1642916332] [2020-04-18 07:31:47,055 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,068 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:31:47,069 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 07:31:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:31:47,070 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:47,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 2 times [2020-04-18 07:31:47,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957955980] [2020-04-18 07:31:47,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:47,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957955980] [2020-04-18 07:31:47,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:47,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:47,338 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:47,339 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,341 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:31:47,341 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:47,365 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:47,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:31:47,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 07:31:47,371 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 07:31:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,393 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 07:31:47,394 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 07:31:47,395 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:47,396 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1642916332] [2020-04-18 07:31:47,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:47,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 07:31:47,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1642916332] [2020-04-18 07:31:47,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 07:31:47,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:47,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:31:47,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,405 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 07:31:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,460 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-18 07:31:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 07:31:47,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 07:31:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:47,475 INFO L225 Difference]: With dead ends: 83 [2020-04-18 07:31:47,475 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 07:31:47,476 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 07:31:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-18 07:31:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 07:31:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-18 07:31:47,521 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-18 07:31:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:47,521 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-18 07:31:47,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 07:31:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-18 07:31:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,523 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:47,523 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:47,523 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,524 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-18 07:31:47,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:47,524 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1913493295] [2020-04-18 07:31:47,525 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,526 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 07:31:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 07:31:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,527 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash 235305767, now seen corresponding path program 2 times [2020-04-18 07:31:47,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412607402] [2020-04-18 07:31:47,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:47,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412607402] [2020-04-18 07:31:47,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:47,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:47,641 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:47,642 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,645 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 18 transitions. [2020-04-18 07:31:47,645 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:47,671 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:47,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:31:47,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,672 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 07:31:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,713 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 07:31:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 07:31:47,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,714 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:47,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,714 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 3 times [2020-04-18 07:31:47,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229241076] [2020-04-18 07:31:47,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:47,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229241076] [2020-04-18 07:31:47,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:47,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:31:47,809 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:47,810 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,812 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:31:47,812 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:47,830 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:47,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:31:47,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:47,830 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 5 states. [2020-04-18 07:31:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,858 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 07:31:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 07:31:47,859 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:47,860 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1913493295] [2020-04-18 07:31:47,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:47,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:31:47,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1913493295] [2020-04-18 07:31:47,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 07:31:47,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:47,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:47,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:47,862 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 6 states. [2020-04-18 07:31:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,009 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-18 07:31:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 07:31:48,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 07:31:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:48,011 INFO L225 Difference]: With dead ends: 80 [2020-04-18 07:31:48,011 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 07:31:48,012 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 07:31:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-18 07:31:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 07:31:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-18 07:31:48,022 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-18 07:31:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:48,023 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-18 07:31:48,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 07:31:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-18 07:31:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:48,025 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:48,025 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:48,025 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,025 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-18 07:31:48,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:48,026 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1594856905] [2020-04-18 07:31:48,026 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,027 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:31:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-04-18 07:31:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:48,028 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,028 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 2 times [2020-04-18 07:31:48,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151979777] [2020-04-18 07:31:48,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151979777] [2020-04-18 07:31:48,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:31:48,111 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,112 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,113 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-04-18 07:31:48,113 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,176 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:48,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:48,177 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2020-04-18 07:31:48,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,201 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-04-18 07:31:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-04-18 07:31:48,202 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:48,202 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1594856905] [2020-04-18 07:31:48,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:48,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:31:48,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1594856905] [2020-04-18 07:31:48,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 07:31:48,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:48,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,204 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 6 states. [2020-04-18 07:31:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,264 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-04-18 07:31:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 07:31:48,264 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 07:31:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:48,266 INFO L225 Difference]: With dead ends: 83 [2020-04-18 07:31:48,266 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 07:31:48,266 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 07:31:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-04-18 07:31:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 07:31:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-18 07:31:48,287 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-18 07:31:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:48,288 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-18 07:31:48,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 07:31:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-18 07:31:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,289 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:48,289 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:48,289 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 4 times [2020-04-18 07:31:48,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:48,291 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1623492253] [2020-04-18 07:31:48,291 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,292 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 07:31:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 07:31:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,296 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1295455160, now seen corresponding path program 5 times [2020-04-18 07:31:48,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381072738] [2020-04-18 07:31:48,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:48,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381072738] [2020-04-18 07:31:48,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:48,388 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,389 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,390 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:48,390 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,428 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 07:31:48,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:48,430 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-04-18 07:31:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,483 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2020-04-18 07:31:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2020-04-18 07:31:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,484 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1294792070, now seen corresponding path program 6 times [2020-04-18 07:31:48,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198419294] [2020-04-18 07:31:48,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198419294] [2020-04-18 07:31:48,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433343531] [2020-04-18 07:31:48,554 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:48,625 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:48,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:48,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 07:31:48,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:48,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:48,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-04-18 07:31:48,709 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,710 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,712 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2020-04-18 07:31:48,712 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,762 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:48,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:31:48,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:48,763 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2020-04-18 07:31:48,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,821 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 07:31:48,821 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 07:31:48,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,822 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 7 times [2020-04-18 07:31:48,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173278833] [2020-04-18 07:31:48,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173278833] [2020-04-18 07:31:48,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601626572] [2020-04-18 07:31:48,889 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:31:48,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:48,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:49,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-18 07:31:49,023 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:49,024 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,026 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:49,026 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:49,057 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:49,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:31:49,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:31:49,058 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 10 states. [2020-04-18 07:31:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,123 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 07:31:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 07:31:49,124 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:49,124 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1623492253] [2020-04-18 07:31:49,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:49,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:49,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1623492253] [2020-04-18 07:31:49,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:31:49,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:49,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:49,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:31:49,126 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 12 states. [2020-04-18 07:31:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,364 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-18 07:31:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:31:49,364 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 07:31:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:49,366 INFO L225 Difference]: With dead ends: 101 [2020-04-18 07:31:49,366 INFO L226 Difference]: Without dead ends: 96 [2020-04-18 07:31:49,366 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:31:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-18 07:31:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-18 07:31:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 07:31:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-18 07:31:49,375 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-18 07:31:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:49,376 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-18 07:31:49,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:31:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-18 07:31:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:49,377 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:49,377 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:49,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:49,782 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:49,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-18 07:31:49,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:49,783 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1524700450] [2020-04-18 07:31:49,784 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,785 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 07:31:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:49,786 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 4 times [2020-04-18 07:31:49,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:49,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482085114] [2020-04-18 07:31:49,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482085114] [2020-04-18 07:31:49,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479854776] [2020-04-18 07:31:49,871 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:49,919 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:49,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:49,920 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:31:49,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:50,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-18 07:31:50,009 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,010 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,011 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-04-18 07:31:50,012 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:50,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,129 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:50,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:50,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:31:50,130 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 12 states. [2020-04-18 07:31:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,211 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2020-04-18 07:31:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-04-18 07:31:50,211 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:50,212 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1524700450] [2020-04-18 07:31:50,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:50,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:50,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1524700450] [2020-04-18 07:31:50,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:31:50,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:50,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:50,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:50,214 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 12 states. [2020-04-18 07:31:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,293 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-04-18 07:31:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 07:31:50,295 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 07:31:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:50,296 INFO L225 Difference]: With dead ends: 104 [2020-04-18 07:31:50,296 INFO L226 Difference]: Without dead ends: 98 [2020-04-18 07:31:50,297 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-18 07:31:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-04-18 07:31:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 07:31:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-18 07:31:50,305 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 9 [2020-04-18 07:31:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:50,305 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-18 07:31:50,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:31:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-18 07:31:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,306 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:50,306 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:50,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:50,516 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-18 07:31:50,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:50,517 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1616614244] [2020-04-18 07:31:50,518 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,519 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 07:31:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 07:31:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,520 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 2 times [2020-04-18 07:31:50,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772208603] [2020-04-18 07:31:50,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772208603] [2020-04-18 07:31:50,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:50,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:50,591 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,592 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,594 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-04-18 07:31:50,594 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,627 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:50,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:50,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:50,627 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-04-18 07:31:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,670 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2020-04-18 07:31:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 79 transitions. [2020-04-18 07:31:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,671 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 3 times [2020-04-18 07:31:50,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123031517] [2020-04-18 07:31:50,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123031517] [2020-04-18 07:31:50,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:50,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:50,749 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,750 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,752 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:50,753 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,782 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:31:50,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:50,785 INFO L87 Difference]: Start difference. First operand 45 states and 79 transitions. Second operand 7 states. [2020-04-18 07:31:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,859 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2020-04-18 07:31:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 83 transitions. [2020-04-18 07:31:50,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,860 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-18 07:31:50,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762418751] [2020-04-18 07:31:50,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762418751] [2020-04-18 07:31:50,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:50,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:50,939 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,940 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,943 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 07:31:50,943 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,980 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 07:31:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:50,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:31:50,982 INFO L87 Difference]: Start difference. First operand 50 states and 83 transitions. Second operand 6 states. [2020-04-18 07:31:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,051 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2020-04-18 07:31:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2020-04-18 07:31:51,052 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:51,052 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1616614244] [2020-04-18 07:31:51,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:51,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:51,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1616614244] [2020-04-18 07:31:51,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 07:31:51,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:51,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:31:51,055 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 11 states. [2020-04-18 07:31:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,160 INFO L93 Difference]: Finished difference Result 124 states and 288 transitions. [2020-04-18 07:31:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 07:31:51,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-18 07:31:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:51,163 INFO L225 Difference]: With dead ends: 124 [2020-04-18 07:31:51,163 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 07:31:51,164 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:31:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 07:31:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-04-18 07:31:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-18 07:31:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 210 transitions. [2020-04-18 07:31:51,172 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 210 transitions. Word has length 10 [2020-04-18 07:31:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:51,173 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 210 transitions. [2020-04-18 07:31:51,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 07:31:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 210 transitions. [2020-04-18 07:31:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,174 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:51,174 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:51,174 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:51,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 5 times [2020-04-18 07:31:51,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:51,175 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2089051500] [2020-04-18 07:31:51,175 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,176 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 07:31:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,177 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-18 07:31:51,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:51,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34124302] [2020-04-18 07:31:51,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34124302] [2020-04-18 07:31:51,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105933286] [2020-04-18 07:31:51,273 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:51,332 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:51,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:51,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:51,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:51,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:51,453 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,454 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,455 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 07:31:51,455 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:51,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:51,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,718 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:31:51,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:51,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:31:51,719 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 16 states. [2020-04-18 07:31:51,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,844 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-04-18 07:31:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-04-18 07:31:51,845 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:51,845 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2089051500] [2020-04-18 07:31:51,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:51,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:51,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2089051500] [2020-04-18 07:31:51,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 07:31:51,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:51,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:51,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:51,847 INFO L87 Difference]: Start difference. First operand 87 states and 210 transitions. Second operand 16 states. [2020-04-18 07:31:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,983 INFO L93 Difference]: Finished difference Result 122 states and 292 transitions. [2020-04-18 07:31:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 07:31:51,983 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-04-18 07:31:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:51,984 INFO L225 Difference]: With dead ends: 122 [2020-04-18 07:31:51,985 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 07:31:51,985 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 07:31:51,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 07:31:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-04-18 07:31:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-18 07:31:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-04-18 07:31:51,993 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 10 [2020-04-18 07:31:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:51,993 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-04-18 07:31:51,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 07:31:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-04-18 07:31:51,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:51,994 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:51,994 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:52,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,207 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:52,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-18 07:31:52,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:52,208 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1401639044] [2020-04-18 07:31:52,208 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,209 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 91 transitions. [2020-04-18 07:31:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 07:31:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,210 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 6 times [2020-04-18 07:31:52,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:52,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305691490] [2020-04-18 07:31:52,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305691490] [2020-04-18 07:31:52,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329570903] [2020-04-18 07:31:52,292 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,335 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:52,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:52,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:52,337 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:52,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:52,443 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:52,444 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,446 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 28 transitions. [2020-04-18 07:31:52,446 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:52,535 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:52,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:52,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:52,536 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 11 states. [2020-04-18 07:31:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,643 INFO L93 Difference]: Finished difference Result 62 states and 117 transitions. [2020-04-18 07:31:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 117 transitions. [2020-04-18 07:31:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,644 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 7 times [2020-04-18 07:31:52,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:52,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390106948] [2020-04-18 07:31:52,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390106948] [2020-04-18 07:31:52,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165735872] [2020-04-18 07:31:52,732 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:52,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:52,867 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 07:31:52,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:52,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:52,868 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:52,869 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,870 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 07:31:52,870 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:52,919 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:31:52,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:52,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:52,920 INFO L87 Difference]: Start difference. First operand 62 states and 117 transitions. Second operand 11 states. [2020-04-18 07:31:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:53,048 INFO L93 Difference]: Finished difference Result 70 states and 127 transitions. [2020-04-18 07:31:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 127 transitions. [2020-04-18 07:31:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:53,048 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 8 times [2020-04-18 07:31:53,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126426982] [2020-04-18 07:31:53,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126426982] [2020-04-18 07:31:53,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407088377] [2020-04-18 07:31:53,114 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:53,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:53,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:53,264 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,265 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,267 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:31:53,267 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,367 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 15 times. [2020-04-18 07:31:53,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:53,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:31:53,372 INFO L87 Difference]: Start difference. First operand 70 states and 127 transitions. Second operand 12 states. [2020-04-18 07:31:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:53,543 INFO L93 Difference]: Finished difference Result 81 states and 141 transitions. [2020-04-18 07:31:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-04-18 07:31:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:53,544 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:31:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 9 times [2020-04-18 07:31:53,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681508260] [2020-04-18 07:31:53,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681508260] [2020-04-18 07:31:53,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983941500] [2020-04-18 07:31:53,622 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:31:53,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:53,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:53,732 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,733 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,735 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-04-18 07:31:53,737 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,824 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:31:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:53,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:31:53,825 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 11 states. [2020-04-18 07:31:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:54,167 INFO L93 Difference]: Finished difference Result 90 states and 146 transitions. [2020-04-18 07:31:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 146 transitions. [2020-04-18 07:31:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:54,167 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:31:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:54,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 10 times [2020-04-18 07:31:54,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:54,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681461250] [2020-04-18 07:31:54,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:54,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681461250] [2020-04-18 07:31:54,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806581965] [2020-04-18 07:31:54,227 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:54,276 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:54,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:54,277 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:54,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:54,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:54,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:54,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:54,338 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:54,339 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:54,340 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-04-18 07:31:54,340 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:54,473 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:54,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:54,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:31:54,474 INFO L87 Difference]: Start difference. First operand 90 states and 146 transitions. Second operand 11 states. [2020-04-18 07:31:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:54,729 INFO L93 Difference]: Finished difference Result 97 states and 149 transitions. [2020-04-18 07:31:54,729 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 149 transitions. [2020-04-18 07:31:54,730 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:54,731 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1401639044] [2020-04-18 07:31:54,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:54,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:54,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1401639044] [2020-04-18 07:31:54,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 07:31:54,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:54,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:31:54,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 07:31:54,733 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 28 states. [2020-04-18 07:31:55,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:55,095 INFO L93 Difference]: Finished difference Result 217 states and 499 transitions. [2020-04-18 07:31:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 07:31:55,098 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 11 [2020-04-18 07:31:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:55,100 INFO L225 Difference]: With dead ends: 217 [2020-04-18 07:31:55,100 INFO L226 Difference]: Without dead ends: 198 [2020-04-18 07:31:55,101 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=590, Invalid=1572, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 07:31:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-18 07:31:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 107. [2020-04-18 07:31:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-04-18 07:31:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 271 transitions. [2020-04-18 07:31:55,109 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 271 transitions. Word has length 11 [2020-04-18 07:31:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:55,110 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 271 transitions. [2020-04-18 07:31:55,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 07:31:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 271 transitions. [2020-04-18 07:31:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:55,111 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:55,111 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:56,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,119 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 11 times [2020-04-18 07:31:56,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:56,119 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [573710546] [2020-04-18 07:31:56,120 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,120 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 07:31:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:31:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:56,122 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:56,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 12 times [2020-04-18 07:31:56,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:56,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910198557] [2020-04-18 07:31:56,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910198557] [2020-04-18 07:31:56,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127120004] [2020-04-18 07:31:56,199 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,255 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:56,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:56,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:56,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:56,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:56,331 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:56,332 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,334 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:56,335 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:56,414 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:31:56,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:56,415 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2020-04-18 07:31:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:56,558 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2020-04-18 07:31:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 07:31:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:56,558 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 13 times [2020-04-18 07:31:56,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:56,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929559134] [2020-04-18 07:31:56,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929559134] [2020-04-18 07:31:56,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954334963] [2020-04-18 07:31:56,653 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:56,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:56,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:56,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:56,775 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:56,776 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,778 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 07:31:56,778 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:56,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:56,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:56,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:56,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:56,895 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:31:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:31:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:56,896 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 13 states. [2020-04-18 07:31:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:57,100 INFO L93 Difference]: Finished difference Result 71 states and 126 transitions. [2020-04-18 07:31:57,100 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2020-04-18 07:31:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:57,101 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 14 times [2020-04-18 07:31:57,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:57,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788332012] [2020-04-18 07:31:57,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788332012] [2020-04-18 07:31:57,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93451173] [2020-04-18 07:31:57,181 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:57,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:57,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:57,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:57,227 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:57,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:57,294 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:57,294 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:57,296 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:31:57,296 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:57,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,329 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,391 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:31:57,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:31:57,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:31:57,392 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 14 states. [2020-04-18 07:31:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:57,623 INFO L93 Difference]: Finished difference Result 79 states and 134 transitions. [2020-04-18 07:31:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 134 transitions. [2020-04-18 07:31:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:57,624 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:31:57,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 15 times [2020-04-18 07:31:57,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:57,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821062439] [2020-04-18 07:31:57,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821062439] [2020-04-18 07:31:57,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501174401] [2020-04-18 07:31:57,682 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:57,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:31:57,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:57,752 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:57,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:57,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:57,826 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:57,827 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:57,828 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:31:57,828 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:57,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,876 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:57,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:57,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:31:57,877 INFO L87 Difference]: Start difference. First operand 79 states and 134 transitions. Second operand 12 states. [2020-04-18 07:31:58,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:58,100 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2020-04-18 07:31:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2020-04-18 07:31:58,100 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:58,101 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [573710546] [2020-04-18 07:31:58,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:58,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:58,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [573710546] [2020-04-18 07:31:58,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 07:31:58,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:58,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 07:31:58,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:31:58,103 INFO L87 Difference]: Start difference. First operand 107 states and 271 transitions. Second operand 23 states. [2020-04-18 07:31:58,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:58,271 INFO L93 Difference]: Finished difference Result 153 states and 367 transitions. [2020-04-18 07:31:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:31:58,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 11 [2020-04-18 07:31:58,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:58,273 INFO L225 Difference]: With dead ends: 153 [2020-04-18 07:31:58,273 INFO L226 Difference]: Without dead ends: 148 [2020-04-18 07:31:58,274 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:31:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-18 07:31:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2020-04-18 07:31:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-18 07:31:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2020-04-18 07:31:58,290 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 11 [2020-04-18 07:31:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:58,291 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2020-04-18 07:31:58,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 07:31:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2020-04-18 07:31:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:58,294 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:58,294 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:59,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:59,100 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 7 times [2020-04-18 07:31:59,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:59,101 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [508651324] [2020-04-18 07:31:59,102 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:59,103 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 07:31:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 07:31:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:59,103 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:59,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 8 times [2020-04-18 07:31:59,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:59,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641246725] [2020-04-18 07:31:59,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:59,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641246725] [2020-04-18 07:31:59,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653942302] [2020-04-18 07:31:59,207 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:59,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:59,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:59,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:31:59,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:59,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:59,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:31:59,351 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:59,351 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:59,352 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:31:59,352 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:59,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,640 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 07:31:59,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:31:59,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:31:59,641 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 20 states. [2020-04-18 07:31:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:59,816 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2020-04-18 07:31:59,816 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2020-04-18 07:31:59,817 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:59,817 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [508651324] [2020-04-18 07:31:59,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:59,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:31:59,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [508651324] [2020-04-18 07:31:59,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 07:31:59,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:59,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:31:59,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:31:59,819 INFO L87 Difference]: Start difference. First operand 110 states and 273 transitions. Second operand 20 states. [2020-04-18 07:31:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:59,902 INFO L93 Difference]: Finished difference Result 158 states and 382 transitions. [2020-04-18 07:31:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 07:31:59,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 11 [2020-04-18 07:31:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:59,904 INFO L225 Difference]: With dead ends: 158 [2020-04-18 07:31:59,904 INFO L226 Difference]: Without dead ends: 152 [2020-04-18 07:31:59,905 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:31:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-04-18 07:31:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2020-04-18 07:31:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-18 07:31:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-04-18 07:31:59,910 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 11 [2020-04-18 07:31:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:59,910 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-04-18 07:31:59,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 07:31:59,911 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-04-18 07:31:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:31:59,911 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:59,911 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:00,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,115 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 16 times [2020-04-18 07:32:00,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:00,117 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [22365360] [2020-04-18 07:32:00,118 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:00,133 INFO L259 McrAutomatonBuilder]: Finished intersection with 57 states and 116 transitions. [2020-04-18 07:32:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-04-18 07:32:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:00,135 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 17 times [2020-04-18 07:32:00,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:00,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259975018] [2020-04-18 07:32:00,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259975018] [2020-04-18 07:32:00,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430297305] [2020-04-18 07:32:00,202 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,259 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:00,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:00,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:00,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:00,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:00,351 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:00,351 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:00,353 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 07:32:00,353 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:00,475 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:00,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:00,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:00,476 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 13 states. [2020-04-18 07:32:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:00,630 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2020-04-18 07:32:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2020-04-18 07:32:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:00,631 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 18 times [2020-04-18 07:32:00,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:00,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377857970] [2020-04-18 07:32:00,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377857970] [2020-04-18 07:32:00,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157887451] [2020-04-18 07:32:00,724 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,773 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:00,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:00,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:00,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:00,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:00,864 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:00,866 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:00,867 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:00,867 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:00,919 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:00,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:00,920 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand 13 states. [2020-04-18 07:32:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:01,096 INFO L93 Difference]: Finished difference Result 93 states and 178 transitions. [2020-04-18 07:32:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 178 transitions. [2020-04-18 07:32:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:01,097 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:01,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 19 times [2020-04-18 07:32:01,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:01,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504884524] [2020-04-18 07:32:01,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504884524] [2020-04-18 07:32:01,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729275542] [2020-04-18 07:32:01,192 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:01,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:01,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:01,318 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:01,319 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:01,321 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 07:32:01,321 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:01,377 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:01,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:01,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:32:01,378 INFO L87 Difference]: Start difference. First operand 93 states and 178 transitions. Second operand 13 states. [2020-04-18 07:32:01,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:01,555 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2020-04-18 07:32:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 188 transitions. [2020-04-18 07:32:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:01,556 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:01,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 20 times [2020-04-18 07:32:01,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:01,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868513921] [2020-04-18 07:32:01,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868513921] [2020-04-18 07:32:01,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698817455] [2020-04-18 07:32:01,658 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:01,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:01,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:01,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:01,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:01,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:01,830 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:01,832 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:01,835 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 40 transitions. [2020-04-18 07:32:01,835 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:01,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:01,911 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 21 times. [2020-04-18 07:32:01,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:32:01,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:01,912 INFO L87 Difference]: Start difference. First operand 101 states and 188 transitions. Second operand 14 states. [2020-04-18 07:32:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:02,177 INFO L93 Difference]: Finished difference Result 119 states and 214 transitions. [2020-04-18 07:32:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 214 transitions. [2020-04-18 07:32:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:02,178 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 21 times [2020-04-18 07:32:02,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:02,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624023633] [2020-04-18 07:32:02,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624023633] [2020-04-18 07:32:02,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564393228] [2020-04-18 07:32:02,261 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:02,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:32:02,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:02,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:02,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:02,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:02,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:02,472 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:02,473 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:02,476 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:02,476 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:02,640 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:02,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:32:02,641 INFO L87 Difference]: Start difference. First operand 119 states and 214 transitions. Second operand 13 states. [2020-04-18 07:32:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:03,227 INFO L93 Difference]: Finished difference Result 136 states and 231 transitions. [2020-04-18 07:32:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 231 transitions. [2020-04-18 07:32:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:03,228 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:03,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 22 times [2020-04-18 07:32:03,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:03,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754036828] [2020-04-18 07:32:03,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:03,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754036828] [2020-04-18 07:32:03,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434698007] [2020-04-18 07:32:03,294 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:03,348 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:03,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:03,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:03,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:03,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:03,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:03,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:03,460 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:03,461 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:03,463 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 07:32:03,463 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:03,677 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:03,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:03,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=1218, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:32:03,681 INFO L87 Difference]: Start difference. First operand 136 states and 231 transitions. Second operand 13 states. [2020-04-18 07:32:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:04,177 INFO L93 Difference]: Finished difference Result 152 states and 241 transitions. [2020-04-18 07:32:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 241 transitions. [2020-04-18 07:32:04,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:04,179 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:04,179 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 23 times [2020-04-18 07:32:04,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:04,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167762463] [2020-04-18 07:32:04,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:04,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167762463] [2020-04-18 07:32:04,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670531110] [2020-04-18 07:32:04,244 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:04,287 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:04,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:04,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:04,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:04,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:04,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:04,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:04,364 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:04,364 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:04,366 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:04,366 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:04,620 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:04,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:04,623 INFO L87 Difference]: Start difference. First operand 152 states and 241 transitions. Second operand 13 states. [2020-04-18 07:32:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:05,014 INFO L93 Difference]: Finished difference Result 164 states and 248 transitions. [2020-04-18 07:32:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2020-04-18 07:32:05,014 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:05,015 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [22365360] [2020-04-18 07:32:05,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:05,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:05,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [22365360] [2020-04-18 07:32:05,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 07:32:05,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:05,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 07:32:05,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1126, Invalid=3296, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 07:32:05,018 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand 41 states. [2020-04-18 07:32:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:05,923 INFO L93 Difference]: Finished difference Result 287 states and 662 transitions. [2020-04-18 07:32:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-18 07:32:05,927 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 12 [2020-04-18 07:32:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:05,931 INFO L225 Difference]: With dead ends: 287 [2020-04-18 07:32:05,931 INFO L226 Difference]: Without dead ends: 268 [2020-04-18 07:32:05,933 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 203 SyntacticMatches, 24 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1496, Invalid=4510, Unknown=0, NotChecked=0, Total=6006 [2020-04-18 07:32:05,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-18 07:32:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 131. [2020-04-18 07:32:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-04-18 07:32:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-04-18 07:32:05,943 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 12 [2020-04-18 07:32:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:05,944 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-04-18 07:32:05,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 07:32:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-04-18 07:32:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:05,944 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:05,945 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:07,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:07,350 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 24 times [2020-04-18 07:32:07,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:07,351 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1717614223] [2020-04-18 07:32:07,352 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:07,353 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 07:32:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 07:32:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:07,354 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 25 times [2020-04-18 07:32:07,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:07,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326388438] [2020-04-18 07:32:07,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:07,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326388438] [2020-04-18 07:32:07,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501758316] [2020-04-18 07:32:07,441 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:07,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:07,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:07,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:07,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:07,571 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:07,571 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:07,573 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:32:07,573 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:07,692 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:32:07,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:07,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:07,693 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 13 states. [2020-04-18 07:32:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:07,922 INFO L93 Difference]: Finished difference Result 84 states and 169 transitions. [2020-04-18 07:32:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2020-04-18 07:32:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:07,924 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 26 times [2020-04-18 07:32:07,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:07,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784171865] [2020-04-18 07:32:07,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784171865] [2020-04-18 07:32:08,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159536282] [2020-04-18 07:32:08,007 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:08,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:08,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:08,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:08,058 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:08,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:08,132 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:08,133 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:08,134 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 07:32:08,135 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:08,224 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:08,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:08,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:08,225 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand 13 states. [2020-04-18 07:32:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:08,482 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2020-04-18 07:32:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2020-04-18 07:32:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:08,483 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:08,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:08,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 27 times [2020-04-18 07:32:08,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:08,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795198072] [2020-04-18 07:32:08,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795198072] [2020-04-18 07:32:08,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039730877] [2020-04-18 07:32:08,581 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:08,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:08,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:08,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:08,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:08,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:08,719 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:08,720 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:08,722 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 32 transitions. [2020-04-18 07:32:08,722 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:08,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:08,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:08,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:08,884 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:32:08,885 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand 15 states. [2020-04-18 07:32:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:09,285 INFO L93 Difference]: Finished difference Result 110 states and 201 transitions. [2020-04-18 07:32:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 201 transitions. [2020-04-18 07:32:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:09,286 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:09,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 28 times [2020-04-18 07:32:09,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:09,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181360071] [2020-04-18 07:32:09,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181360071] [2020-04-18 07:32:09,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096560617] [2020-04-18 07:32:09,394 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:09,439 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:09,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:09,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:09,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:09,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:09,534 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:09,535 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:09,537 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:09,537 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:09,588 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:32:09,589 INFO L87 Difference]: Start difference. First operand 110 states and 201 transitions. Second operand 13 states. [2020-04-18 07:32:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:09,790 INFO L93 Difference]: Finished difference Result 123 states and 221 transitions. [2020-04-18 07:32:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 221 transitions. [2020-04-18 07:32:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:09,791 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:09,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:09,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 29 times [2020-04-18 07:32:09,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:09,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654661015] [2020-04-18 07:32:09,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654661015] [2020-04-18 07:32:09,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301997262] [2020-04-18 07:32:09,873 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:09,921 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:09,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:09,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:09,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:10,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:10,055 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:10,056 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:10,059 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:10,059 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:10,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:10,115 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,153 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:10,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:10,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 07:32:10,155 INFO L87 Difference]: Start difference. First operand 123 states and 221 transitions. Second operand 15 states. [2020-04-18 07:32:10,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:10,637 INFO L93 Difference]: Finished difference Result 137 states and 239 transitions. [2020-04-18 07:32:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 239 transitions. [2020-04-18 07:32:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:10,639 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 30 times [2020-04-18 07:32:10,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:10,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065903897] [2020-04-18 07:32:10,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065903897] [2020-04-18 07:32:10,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754628784] [2020-04-18 07:32:10,718 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:10,758 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:10,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:10,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:10,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:10,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:10,840 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:10,840 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:10,842 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:32:10,842 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:10,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:10,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,963 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 17 times. [2020-04-18 07:32:10,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:10,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 07:32:10,965 INFO L87 Difference]: Start difference. First operand 137 states and 239 transitions. Second operand 16 states. [2020-04-18 07:32:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:11,387 INFO L93 Difference]: Finished difference Result 156 states and 263 transitions. [2020-04-18 07:32:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 263 transitions. [2020-04-18 07:32:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:11,388 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 31 times [2020-04-18 07:32:11,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:11,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496726289] [2020-04-18 07:32:11,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496726289] [2020-04-18 07:32:11,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214503288] [2020-04-18 07:32:11,450 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:11,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:11,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:11,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:11,587 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:11,588 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:11,589 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 07:32:11,589 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:11,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,686 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:32:11,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:32:11,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=1956, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 07:32:11,688 INFO L87 Difference]: Start difference. First operand 156 states and 263 transitions. Second operand 14 states. [2020-04-18 07:32:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:12,198 INFO L93 Difference]: Finished difference Result 161 states and 267 transitions. [2020-04-18 07:32:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2020-04-18 07:32:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:12,199 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:32:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:12,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 32 times [2020-04-18 07:32:12,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:12,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563945343] [2020-04-18 07:32:12,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:12,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563945343] [2020-04-18 07:32:12,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344538891] [2020-04-18 07:32:12,269 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:12,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:12,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:12,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:12,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:12,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:12,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:12,413 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:12,414 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:12,416 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:12,416 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:12,493 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:12,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=2621, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:12,495 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand 13 states. [2020-04-18 07:32:12,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:12,976 INFO L93 Difference]: Finished difference Result 173 states and 276 transitions. [2020-04-18 07:32:12,976 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 276 transitions. [2020-04-18 07:32:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:12,977 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:32:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:12,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 33 times [2020-04-18 07:32:12,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:12,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208197039] [2020-04-18 07:32:12,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:13,059 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 07:32:13,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208197039] [2020-04-18 07:32:13,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967327693] [2020-04-18 07:32:13,061 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:13,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:13,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:13,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:13,139 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:13,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:13,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:13,282 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:13,283 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:13,285 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-04-18 07:32:13,285 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:13,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:13,492 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:32:13,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:32:13,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 07:32:13,495 INFO L87 Difference]: Start difference. First operand 173 states and 276 transitions. Second operand 14 states. [2020-04-18 07:32:14,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:14,220 INFO L93 Difference]: Finished difference Result 184 states and 285 transitions. [2020-04-18 07:32:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 285 transitions. [2020-04-18 07:32:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:14,221 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:32:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:14,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 34 times [2020-04-18 07:32:14,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:14,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706533188] [2020-04-18 07:32:14,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:14,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706533188] [2020-04-18 07:32:14,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941070872] [2020-04-18 07:32:14,311 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:14,390 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:14,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:14,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:14,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:14,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:14,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:14,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:14,521 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:14,523 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:14,526 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:14,526 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:14,880 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:14,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=4356, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 07:32:14,882 INFO L87 Difference]: Start difference. First operand 184 states and 285 transitions. Second operand 13 states. [2020-04-18 07:32:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:15,503 INFO L93 Difference]: Finished difference Result 193 states and 289 transitions. [2020-04-18 07:32:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2020-04-18 07:32:15,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:15,504 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1717614223] [2020-04-18 07:32:15,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:15,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:15,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1717614223] [2020-04-18 07:32:15,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-04-18 07:32:15,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:15,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 07:32:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5503, Unknown=0, NotChecked=0, Total=7310 [2020-04-18 07:32:15,509 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 49 states. [2020-04-18 07:32:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:16,554 INFO L93 Difference]: Finished difference Result 283 states and 666 transitions. [2020-04-18 07:32:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 07:32:16,555 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 12 [2020-04-18 07:32:16,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:16,557 INFO L225 Difference]: With dead ends: 283 [2020-04-18 07:32:16,557 INFO L226 Difference]: Without dead ends: 263 [2020-04-18 07:32:16,560 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 264 SyntacticMatches, 25 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2594, Invalid=7912, Unknown=0, NotChecked=0, Total=10506 [2020-04-18 07:32:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-18 07:32:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 136. [2020-04-18 07:32:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-18 07:32:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2020-04-18 07:32:16,567 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 12 [2020-04-18 07:32:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:16,567 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2020-04-18 07:32:16,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-04-18 07:32:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2020-04-18 07:32:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:16,568 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:16,568 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:18,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:18,572 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:18,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:18,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 9 times [2020-04-18 07:32:18,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:18,573 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [516878937] [2020-04-18 07:32:18,574 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:18,575 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:32:18,575 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 07:32:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:18,575 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:18,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 10 times [2020-04-18 07:32:18,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:18,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221740344] [2020-04-18 07:32:18,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:18,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221740344] [2020-04-18 07:32:18,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689472935] [2020-04-18 07:32:18,706 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:18,788 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:18,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:18,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:18,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:18,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:18,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:18,951 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:18,952 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:18,956 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 07:32:18,956 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:19,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:19,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:19,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:19,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:19,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,337 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:32:19,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:32:19,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:32:19,338 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 24 states. [2020-04-18 07:32:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:19,587 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2020-04-18 07:32:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-04-18 07:32:19,587 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:19,588 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [516878937] [2020-04-18 07:32:19,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:19,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:32:19,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [516878937] [2020-04-18 07:32:19,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 07:32:19,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:19,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:32:19,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:32:19,591 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand 24 states. [2020-04-18 07:32:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:19,714 INFO L93 Difference]: Finished difference Result 199 states and 487 transitions. [2020-04-18 07:32:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 07:32:19,715 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2020-04-18 07:32:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:19,717 INFO L225 Difference]: With dead ends: 199 [2020-04-18 07:32:19,718 INFO L226 Difference]: Without dead ends: 193 [2020-04-18 07:32:19,718 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:32:19,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-18 07:32:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2020-04-18 07:32:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-18 07:32:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 374 transitions. [2020-04-18 07:32:19,724 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 374 transitions. Word has length 12 [2020-04-18 07:32:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:19,724 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 374 transitions. [2020-04-18 07:32:19,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 07:32:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 374 transitions. [2020-04-18 07:32:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:19,725 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:19,725 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:19,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:19,929 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 35 times [2020-04-18 07:32:19,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:19,930 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1027913567] [2020-04-18 07:32:19,931 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:19,932 INFO L259 McrAutomatonBuilder]: Finished intersection with 72 states and 153 transitions. [2020-04-18 07:32:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-04-18 07:32:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:19,933 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 36 times [2020-04-18 07:32:19,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:19,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738707180] [2020-04-18 07:32:19,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:20,019 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 07:32:20,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738707180] [2020-04-18 07:32:20,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006829547] [2020-04-18 07:32:20,020 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:20,061 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:20,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:20,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:20,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:20,193 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 07:32:20,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:20,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:20,194 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:20,194 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:20,196 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 32 transitions. [2020-04-18 07:32:20,196 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:20,340 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:20,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:20,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:20,340 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 15 states. [2020-04-18 07:32:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:20,631 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2020-04-18 07:32:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 223 transitions. [2020-04-18 07:32:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:20,632 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 37 times [2020-04-18 07:32:20,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:20,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96449814] [2020-04-18 07:32:20,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:20,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96449814] [2020-04-18 07:32:20,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77351565] [2020-04-18 07:32:20,718 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:20,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:20,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:26,417 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 07:32:26,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:26,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-18 07:32:26,418 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:26,418 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:26,420 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:26,420 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:32,585 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:32:32,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:32,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-04-18 07:32:32,586 INFO L87 Difference]: Start difference. First operand 107 states and 223 transitions. Second operand 15 states. [2020-04-18 07:32:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:32,983 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2020-04-18 07:32:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 240 transitions. [2020-04-18 07:32:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:32,984 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:32,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 38 times [2020-04-18 07:32:32,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:32,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199387194] [2020-04-18 07:32:32,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:33,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199387194] [2020-04-18 07:32:33,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525832664] [2020-04-18 07:32:33,086 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:33,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:33,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:33,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:33,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:33,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:33,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:33,265 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:33,266 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:33,268 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:33,268 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:33,354 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:33,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:33,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:32:33,355 INFO L87 Difference]: Start difference. First operand 119 states and 240 transitions. Second operand 15 states. [2020-04-18 07:32:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:33,751 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 07:32:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 07:32:33,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:33,752 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:33,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 39 times [2020-04-18 07:32:33,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:33,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237970773] [2020-04-18 07:32:33,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:33,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237970773] [2020-04-18 07:32:33,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441601779] [2020-04-18 07:32:33,838 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:33,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:33,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:33,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:33,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:33,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:33,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:33,984 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:33,985 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:33,987 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:32:33,987 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:34,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:34,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:34,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:34,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:34,205 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:34,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 07:32:34,206 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 07:32:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:34,759 INFO L93 Difference]: Finished difference Result 151 states and 280 transitions. [2020-04-18 07:32:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 280 transitions. [2020-04-18 07:32:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:34,760 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:34,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 40 times [2020-04-18 07:32:34,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:34,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755240028] [2020-04-18 07:32:34,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:34,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755240028] [2020-04-18 07:32:34,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362537688] [2020-04-18 07:32:34,892 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:34,954 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:34,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:34,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:34,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:35,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:35,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:35,058 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:35,059 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:35,061 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:32:35,061 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:35,136 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 07:32:35,137 INFO L87 Difference]: Start difference. First operand 151 states and 280 transitions. Second operand 15 states. [2020-04-18 07:32:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:35,411 INFO L93 Difference]: Finished difference Result 173 states and 321 transitions. [2020-04-18 07:32:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 321 transitions. [2020-04-18 07:32:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:35,412 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:35,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 41 times [2020-04-18 07:32:35,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:35,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785416016] [2020-04-18 07:32:35,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:35,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785416016] [2020-04-18 07:32:35,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925062070] [2020-04-18 07:32:35,528 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:35,568 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:35,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:35,569 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:35,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:35,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:35,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:35,727 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:35,728 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:35,731 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:32:35,731 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:35,802 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:35,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:35,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 07:32:35,802 INFO L87 Difference]: Start difference. First operand 173 states and 321 transitions. Second operand 15 states. [2020-04-18 07:32:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:36,160 INFO L93 Difference]: Finished difference Result 181 states and 330 transitions. [2020-04-18 07:32:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 330 transitions. [2020-04-18 07:32:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:36,161 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 42 times [2020-04-18 07:32:36,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:36,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041864339] [2020-04-18 07:32:36,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:36,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041864339] [2020-04-18 07:32:36,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454319226] [2020-04-18 07:32:36,266 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:36,309 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:36,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:36,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:36,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:36,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:36,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:36,406 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:36,407 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:36,409 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:32:36,409 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:36,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:36,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,473 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:36,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:36,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=1964, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 07:32:36,475 INFO L87 Difference]: Start difference. First operand 181 states and 330 transitions. Second operand 17 states. [2020-04-18 07:32:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:37,184 INFO L93 Difference]: Finished difference Result 204 states and 364 transitions. [2020-04-18 07:32:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 364 transitions. [2020-04-18 07:32:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:37,185 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:32:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:37,185 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 43 times [2020-04-18 07:32:37,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:37,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145788106] [2020-04-18 07:32:37,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:37,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145788106] [2020-04-18 07:32:37,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474212310] [2020-04-18 07:32:37,289 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:37,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:37,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:37,452 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 07:32:37,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:37,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:37,452 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:37,453 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:37,455 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:32:37,455 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:37,512 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:37,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:37,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=2498, Unknown=0, NotChecked=0, Total=3306 [2020-04-18 07:32:37,513 INFO L87 Difference]: Start difference. First operand 204 states and 364 transitions. Second operand 15 states. [2020-04-18 07:32:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:37,847 INFO L93 Difference]: Finished difference Result 213 states and 378 transitions. [2020-04-18 07:32:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 378 transitions. [2020-04-18 07:32:37,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:37,848 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:32:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:37,849 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 44 times [2020-04-18 07:32:37,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:37,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963660479] [2020-04-18 07:32:37,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:37,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963660479] [2020-04-18 07:32:37,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991113922] [2020-04-18 07:32:37,941 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:37,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:37,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:37,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:37,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:42,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:42,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:42,106 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:42,107 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:42,109 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:32:42,109 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:42,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:42,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:42,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:42,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:42,209 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:42,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:42,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:42,210 INFO L87 Difference]: Start difference. First operand 213 states and 378 transitions. Second operand 17 states. [2020-04-18 07:32:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:42,863 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2020-04-18 07:32:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 400 transitions. [2020-04-18 07:32:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:42,863 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:32:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:42,864 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 45 times [2020-04-18 07:32:42,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:42,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264900353] [2020-04-18 07:32:42,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:42,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264900353] [2020-04-18 07:32:42,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996084358] [2020-04-18 07:32:42,956 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:42,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:32:42,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:43,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:43,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:43,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:43,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:43,102 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:43,102 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:43,104 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 43 transitions. [2020-04-18 07:32:43,104 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:43,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:43,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:43,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:43,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:43,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:43,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:43,254 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 07:32:43,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:32:43,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 07:32:43,256 INFO L87 Difference]: Start difference. First operand 231 states and 400 transitions. Second operand 18 states. [2020-04-18 07:32:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:43,792 INFO L93 Difference]: Finished difference Result 265 states and 451 transitions. [2020-04-18 07:32:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 451 transitions. [2020-04-18 07:32:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:43,793 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:32:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:43,794 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 46 times [2020-04-18 07:32:43,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:43,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502942884] [2020-04-18 07:32:43,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:43,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502942884] [2020-04-18 07:32:43,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453575317] [2020-04-18 07:32:43,920 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:43,960 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:43,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:43,961 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:43,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:46,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:46,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:46,164 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:46,165 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:46,167 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 07:32:46,167 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:46,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:46,413 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 07:32:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1325, Invalid=4077, Unknown=0, NotChecked=0, Total=5402 [2020-04-18 07:32:46,414 INFO L87 Difference]: Start difference. First operand 265 states and 451 transitions. Second operand 16 states. [2020-04-18 07:32:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:47,329 INFO L93 Difference]: Finished difference Result 283 states and 476 transitions. [2020-04-18 07:32:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 476 transitions. [2020-04-18 07:32:47,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:47,330 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:32:47,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:47,330 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 47 times [2020-04-18 07:32:47,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:47,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989970393] [2020-04-18 07:32:47,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:47,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989970393] [2020-04-18 07:32:47,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760522938] [2020-04-18 07:32:47,413 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:47,472 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:47,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:47,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:47,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:47,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:47,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:47,630 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:47,632 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:47,635 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:32:47,635 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:47,791 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:47,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:47,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1670, Invalid=5136, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 07:32:47,792 INFO L87 Difference]: Start difference. First operand 283 states and 476 transitions. Second operand 15 states. [2020-04-18 07:32:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:48,584 INFO L93 Difference]: Finished difference Result 299 states and 494 transitions. [2020-04-18 07:32:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 494 transitions. [2020-04-18 07:32:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:48,585 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:32:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 48 times [2020-04-18 07:32:48,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:48,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579829552] [2020-04-18 07:32:48,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:48,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579829552] [2020-04-18 07:32:48,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445676414] [2020-04-18 07:32:48,682 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:48,733 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:48,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:48,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:48,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:48,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:48,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:48,847 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:48,847 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:48,849 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:32:48,849 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:49,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:49,028 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:32:49,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:49,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2167, Invalid=6575, Unknown=0, NotChecked=0, Total=8742 [2020-04-18 07:32:49,030 INFO L87 Difference]: Start difference. First operand 299 states and 494 transitions. Second operand 16 states. [2020-04-18 07:32:49,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:49,854 INFO L93 Difference]: Finished difference Result 308 states and 503 transitions. [2020-04-18 07:32:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 503 transitions. [2020-04-18 07:32:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:49,855 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:32:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:49,856 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 49 times [2020-04-18 07:32:49,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:49,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960351437] [2020-04-18 07:32:49,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:49,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960351437] [2020-04-18 07:32:49,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40590058] [2020-04-18 07:32:49,924 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:49,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:49,968 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:50,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:50,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:50,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:50,051 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:50,052 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:50,054 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:32:50,054 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:50,299 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:50,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:50,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=8559, Unknown=0, NotChecked=0, Total=11342 [2020-04-18 07:32:50,302 INFO L87 Difference]: Start difference. First operand 308 states and 503 transitions. Second operand 15 states. [2020-04-18 07:32:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:51,474 INFO L93 Difference]: Finished difference Result 330 states and 529 transitions. [2020-04-18 07:32:51,474 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 529 transitions. [2020-04-18 07:32:51,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:51,475 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:32:51,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:51,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 50 times [2020-04-18 07:32:51,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:51,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978494394] [2020-04-18 07:32:51,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:51,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978494394] [2020-04-18 07:32:51,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771553546] [2020-04-18 07:32:51,555 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:51,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:51,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:51,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:51,597 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:51,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:51,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:51,710 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:51,711 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:51,713 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:51,713 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:51,782 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:51,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3506, Invalid=11256, Unknown=0, NotChecked=0, Total=14762 [2020-04-18 07:32:51,784 INFO L87 Difference]: Start difference. First operand 330 states and 529 transitions. Second operand 15 states. [2020-04-18 07:32:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:52,159 INFO L93 Difference]: Finished difference Result 341 states and 536 transitions. [2020-04-18 07:32:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2020-04-18 07:32:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:52,160 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 07:32:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:52,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 51 times [2020-04-18 07:32:52,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:52,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247550008] [2020-04-18 07:32:52,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:52,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247550008] [2020-04-18 07:32:52,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603700168] [2020-04-18 07:32:52,248 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:52,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:52,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:52,304 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:52,305 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:52,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:52,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:52,427 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:52,427 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:52,429 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:52,429 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:52,547 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:52,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:52,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3693, Invalid=12057, Unknown=0, NotChecked=0, Total=15750 [2020-04-18 07:32:52,548 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand 15 states. [2020-04-18 07:32:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:53,145 INFO L93 Difference]: Finished difference Result 353 states and 545 transitions. [2020-04-18 07:32:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 545 transitions. [2020-04-18 07:32:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:53,146 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 07:32:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:53,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 52 times [2020-04-18 07:32:53,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:53,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278248995] [2020-04-18 07:32:53,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:53,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278248995] [2020-04-18 07:32:53,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568024283] [2020-04-18 07:32:53,242 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:53,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:53,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:53,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:53,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:53,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:53,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:53,383 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:53,384 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:53,385 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:32:53,386 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:53,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:53,595 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:32:53,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:53,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=13681, Unknown=0, NotChecked=0, Total=17822 [2020-04-18 07:32:53,598 INFO L87 Difference]: Start difference. First operand 353 states and 545 transitions. Second operand 16 states. [2020-04-18 07:32:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:54,372 INFO L93 Difference]: Finished difference Result 365 states and 551 transitions. [2020-04-18 07:32:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 551 transitions. [2020-04-18 07:32:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:54,374 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 07:32:54,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:54,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 53 times [2020-04-18 07:32:54,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:54,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879241901] [2020-04-18 07:32:54,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:54,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879241901] [2020-04-18 07:32:54,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118141346] [2020-04-18 07:32:54,445 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:54,488 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:32:54,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:54,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:54,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:54,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:54,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:54,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:54,588 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:54,589 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:54,590 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:54,590 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:00,174 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:33:00,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4913, Invalid=16539, Unknown=10, NotChecked=0, Total=21462 [2020-04-18 07:33:00,176 INFO L87 Difference]: Start difference. First operand 365 states and 551 transitions. Second operand 15 states. [2020-04-18 07:33:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:01,709 INFO L93 Difference]: Finished difference Result 386 states and 564 transitions. [2020-04-18 07:33:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 564 transitions. [2020-04-18 07:33:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:01,710 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 07:33:01,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:01,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 54 times [2020-04-18 07:33:01,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:01,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325648605] [2020-04-18 07:33:01,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:01,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325648605] [2020-04-18 07:33:01,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644430347] [2020-04-18 07:33:01,811 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:01,851 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:33:01,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:01,851 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:01,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:01,929 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:01,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:01,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:01,938 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:01,939 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:01,940 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:33:01,940 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:02,279 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:33:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6132, Invalid=21580, Unknown=10, NotChecked=0, Total=27722 [2020-04-18 07:33:02,281 INFO L87 Difference]: Start difference. First operand 386 states and 564 transitions. Second operand 15 states. [2020-04-18 07:33:03,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:03,362 INFO L93 Difference]: Finished difference Result 401 states and 577 transitions. [2020-04-18 07:33:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 577 transitions. [2020-04-18 07:33:03,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:03,364 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1027913567] [2020-04-18 07:33:03,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:03,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:33:03,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1027913567] [2020-04-18 07:33:03,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-04-18 07:33:03,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:03,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-04-18 07:33:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=24922, Unknown=10, NotChecked=0, Total=31862 [2020-04-18 07:33:03,367 INFO L87 Difference]: Start difference. First operand 146 states and 374 transitions. Second operand 88 states. [2020-04-18 07:33:17,841 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-18 07:33:24,457 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-04-18 07:33:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:35,109 INFO L93 Difference]: Finished difference Result 504 states and 1177 transitions. [2020-04-18 07:33:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-04-18 07:33:35,109 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 13 [2020-04-18 07:33:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:35,113 INFO L225 Difference]: With dead ends: 504 [2020-04-18 07:33:35,113 INFO L226 Difference]: Without dead ends: 456 [2020-04-18 07:33:35,115 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 574 SyntacticMatches, 74 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32349 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=12927, Invalid=48287, Unknown=42, NotChecked=0, Total=61256 [2020-04-18 07:33:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-04-18 07:33:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 172. [2020-04-18 07:33:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-18 07:33:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 470 transitions. [2020-04-18 07:33:35,123 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 470 transitions. Word has length 13 [2020-04-18 07:33:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:35,124 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 470 transitions. [2020-04-18 07:33:35,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-04-18 07:33:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 470 transitions. [2020-04-18 07:33:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:35,124 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:35,125 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:38,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:38,937 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:33:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 55 times [2020-04-18 07:33:38,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:38,937 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [983738626] [2020-04-18 07:33:38,938 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:38,938 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 149 transitions. [2020-04-18 07:33:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 07:33:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:38,939 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:38,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148993, now seen corresponding path program 56 times [2020-04-18 07:33:38,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:38,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785290657] [2020-04-18 07:33:38,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:39,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785290657] [2020-04-18 07:33:39,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491142009] [2020-04-18 07:33:39,013 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:39,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:39,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:39,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:39,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:39,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:39,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:39,157 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:39,158 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:39,160 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:33:39,160 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:39,286 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:33:39,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:39,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:33:39,287 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 15 states. [2020-04-18 07:33:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:39,581 INFO L93 Difference]: Finished difference Result 106 states and 221 transitions. [2020-04-18 07:33:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2020-04-18 07:33:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:39,582 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:33:39,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:39,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 57 times [2020-04-18 07:33:39,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:39,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577504724] [2020-04-18 07:33:39,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:39,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577504724] [2020-04-18 07:33:39,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784078654] [2020-04-18 07:33:39,674 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:39,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:33:39,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:39,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:39,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:39,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:39,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:39,810 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:39,811 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:39,813 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:33:39,813 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:39,925 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:39,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:39,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:33:39,926 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand 15 states. [2020-04-18 07:33:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:40,290 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2020-04-18 07:33:40,290 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 239 transitions. [2020-04-18 07:33:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:40,291 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:33:40,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 58 times [2020-04-18 07:33:40,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:40,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980202748] [2020-04-18 07:33:40,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:40,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980202748] [2020-04-18 07:33:40,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411435175] [2020-04-18 07:33:40,368 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:40,409 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:40,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:40,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:40,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:40,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:40,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:40,942 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:40,943 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:40,944 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:33:40,944 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:41,058 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:41,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 07:33:41,059 INFO L87 Difference]: Start difference. First operand 117 states and 239 transitions. Second operand 15 states. [2020-04-18 07:33:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:41,482 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 07:33:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 07:33:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:41,483 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:33:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 59 times [2020-04-18 07:33:41,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:41,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008726484] [2020-04-18 07:33:41,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:41,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008726484] [2020-04-18 07:33:41,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504496504] [2020-04-18 07:33:41,563 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:41,606 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:33:41,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:41,607 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:41,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:42,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:42,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:42,165 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:42,165 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:42,167 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:33:42,167 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:42,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:42,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:42,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:42,370 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:42,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=1708, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 07:33:42,371 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 07:33:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:43,005 INFO L93 Difference]: Finished difference Result 156 states and 295 transitions. [2020-04-18 07:33:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 295 transitions. [2020-04-18 07:33:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:43,006 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:33:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 60 times [2020-04-18 07:33:43,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:43,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119477615] [2020-04-18 07:33:43,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:43,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119477615] [2020-04-18 07:33:43,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122431237] [2020-04-18 07:33:43,089 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:43,131 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:43,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:43,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:43,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:43,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:43,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:43,225 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:43,225 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:43,227 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:33:43,227 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:43,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:43,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:43,339 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:43,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:43,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=2478, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 07:33:43,340 INFO L87 Difference]: Start difference. First operand 156 states and 295 transitions. Second operand 17 states. [2020-04-18 07:33:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:43,894 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2020-04-18 07:33:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 302 transitions. [2020-04-18 07:33:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:43,894 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:33:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash 9426703, now seen corresponding path program 61 times [2020-04-18 07:33:43,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:43,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262375901] [2020-04-18 07:33:43,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:44,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262375901] [2020-04-18 07:33:44,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83828941] [2020-04-18 07:33:44,007 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:44,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:44,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:44,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:44,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:44,152 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:44,153 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:44,155 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:33:44,155 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:44,208 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:44,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:44,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3064, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 07:33:44,209 INFO L87 Difference]: Start difference. First operand 164 states and 302 transitions. Second operand 15 states. [2020-04-18 07:33:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:44,521 INFO L93 Difference]: Finished difference Result 182 states and 332 transitions. [2020-04-18 07:33:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 332 transitions. [2020-04-18 07:33:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:44,522 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:33:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 62 times [2020-04-18 07:33:44,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:44,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901592400] [2020-04-18 07:33:44,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:44,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901592400] [2020-04-18 07:33:44,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738148491] [2020-04-18 07:33:44,604 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:44,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:44,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:44,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:44,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:44,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:44,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:44,737 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:44,738 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:44,740 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:33:44,740 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:44,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:44,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:44,809 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 07:33:44,810 INFO L87 Difference]: Start difference. First operand 182 states and 332 transitions. Second operand 17 states. [2020-04-18 07:33:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:45,436 INFO L93 Difference]: Finished difference Result 201 states and 361 transitions. [2020-04-18 07:33:45,437 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 361 transitions. [2020-04-18 07:33:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:45,437 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:33:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:45,438 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 63 times [2020-04-18 07:33:45,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:45,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68419870] [2020-04-18 07:33:45,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:45,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68419870] [2020-04-18 07:33:45,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586263067] [2020-04-18 07:33:45,519 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:45,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:33:45,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:45,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:45,575 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:46,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:46,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:46,103 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:46,103 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:46,105 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:33:46,105 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:46,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:46,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:46,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:46,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:46,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:46,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:46,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:46,235 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:33:46,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:33:46,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=3978, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 07:33:46,236 INFO L87 Difference]: Start difference. First operand 201 states and 361 transitions. Second operand 19 states. [2020-04-18 07:33:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:47,247 INFO L93 Difference]: Finished difference Result 237 states and 410 transitions. [2020-04-18 07:33:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 410 transitions. [2020-04-18 07:33:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:47,248 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:33:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:47,248 INFO L82 PathProgramCache]: Analyzing trace with hash 646656193, now seen corresponding path program 64 times [2020-04-18 07:33:47,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:47,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188595559] [2020-04-18 07:33:47,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:47,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188595559] [2020-04-18 07:33:47,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240323244] [2020-04-18 07:33:47,331 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:47,374 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:47,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:47,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:47,375 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:47,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:47,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:47,477 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:47,478 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:47,480 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 39 transitions. [2020-04-18 07:33:47,480 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:47,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:47,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:47,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:47,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:47,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:47,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:47,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:47,733 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 07:33:47,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:33:47,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=5905, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 07:33:47,734 INFO L87 Difference]: Start difference. First operand 237 states and 410 transitions. Second operand 20 states. [2020-04-18 07:33:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:48,347 INFO L93 Difference]: Finished difference Result 268 states and 455 transitions. [2020-04-18 07:33:48,347 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 455 transitions. [2020-04-18 07:33:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:48,348 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:33:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 65 times [2020-04-18 07:33:48,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:48,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969495927] [2020-04-18 07:33:48,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:48,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969495927] [2020-04-18 07:33:48,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51057676] [2020-04-18 07:33:48,409 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:48,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:48,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:48,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:48,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:48,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:48,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:48,541 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:48,542 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:48,543 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:33:48,543 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:48,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:48,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:48,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:48,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:48,765 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 07:33:48,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:33:48,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=7200, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 07:33:48,766 INFO L87 Difference]: Start difference. First operand 268 states and 455 transitions. Second operand 18 states. [2020-04-18 07:33:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:49,585 INFO L93 Difference]: Finished difference Result 284 states and 475 transitions. [2020-04-18 07:33:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 475 transitions. [2020-04-18 07:33:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:49,586 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:33:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 66 times [2020-04-18 07:33:49,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:49,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543780168] [2020-04-18 07:33:49,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:49,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543780168] [2020-04-18 07:33:49,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071749408] [2020-04-18 07:33:49,652 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:49,694 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:49,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:49,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:49,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:49,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:49,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:49,801 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:49,801 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:49,803 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:33:49,803 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:49,929 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:50,038 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:33:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:33:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=8955, Unknown=0, NotChecked=0, Total=11556 [2020-04-18 07:33:50,040 INFO L87 Difference]: Start difference. First operand 284 states and 475 transitions. Second operand 16 states. [2020-04-18 07:33:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:50,949 INFO L93 Difference]: Finished difference Result 303 states and 492 transitions. [2020-04-18 07:33:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 492 transitions. [2020-04-18 07:33:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:50,950 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:33:50,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:50,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 67 times [2020-04-18 07:33:50,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:50,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102187309] [2020-04-18 07:33:50,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:51,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102187309] [2020-04-18 07:33:51,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983001258] [2020-04-18 07:33:51,015 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:51,056 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:51,057 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:51,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:51,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:51,622 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:51,622 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:51,624 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:33:51,624 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:51,700 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:33:51,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3020, Invalid=10552, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 07:33:51,702 INFO L87 Difference]: Start difference. First operand 303 states and 492 transitions. Second operand 15 states. [2020-04-18 07:33:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:52,389 INFO L93 Difference]: Finished difference Result 326 states and 515 transitions. [2020-04-18 07:33:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 515 transitions. [2020-04-18 07:33:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:52,390 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:33:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:52,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 68 times [2020-04-18 07:33:52,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:52,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071064114] [2020-04-18 07:33:52,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:52,475 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 07:33:52,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071064114] [2020-04-18 07:33:52,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145800672] [2020-04-18 07:33:52,476 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 07:33:52,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:52,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:52,517 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:52,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:52,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:52,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:52,605 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:52,606 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:52,607 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:33:52,607 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:52,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:52,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:52,756 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 07:33:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:52,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3356, Invalid=11896, Unknown=0, NotChecked=0, Total=15252 [2020-04-18 07:33:52,758 INFO L87 Difference]: Start difference. First operand 326 states and 515 transitions. Second operand 17 states. [2020-04-18 07:33:53,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:53,713 INFO L93 Difference]: Finished difference Result 350 states and 530 transitions. [2020-04-18 07:33:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2020-04-18 07:33:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:53,714 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:33:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 69 times [2020-04-18 07:33:53,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:53,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319268764] [2020-04-18 07:33:53,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:53,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319268764] [2020-04-18 07:33:53,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216823816] [2020-04-18 07:33:53,777 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:53,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:33:53,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:53,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:53,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:53,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:53,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:53,922 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:53,923 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:53,924 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:33:53,924 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:54,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:54,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:54,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:54,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:54,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:54,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:54,145 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:33:54,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:33:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3866, Invalid=14224, Unknown=0, NotChecked=0, Total=18090 [2020-04-18 07:33:54,147 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand 18 states. [2020-04-18 07:33:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:55,158 INFO L93 Difference]: Finished difference Result 358 states and 536 transitions. [2020-04-18 07:33:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 536 transitions. [2020-04-18 07:33:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:55,159 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:33:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 70 times [2020-04-18 07:33:55,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:55,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256122827] [2020-04-18 07:33:55,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:55,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256122827] [2020-04-18 07:33:55,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854004357] [2020-04-18 07:33:55,223 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:55,266 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:55,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:55,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:55,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:55,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:55,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:55,356 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:55,357 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:55,358 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:33:55,358 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:55,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:55,545 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:33:55,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:33:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4526, Invalid=16644, Unknown=0, NotChecked=0, Total=21170 [2020-04-18 07:33:55,547 INFO L87 Difference]: Start difference. First operand 358 states and 536 transitions. Second operand 16 states. [2020-04-18 07:33:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:56,504 INFO L93 Difference]: Finished difference Result 359 states and 536 transitions. [2020-04-18 07:33:56,505 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 536 transitions. [2020-04-18 07:33:56,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:56,506 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [983738626] [2020-04-18 07:33:56,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:56,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:33:56,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [983738626] [2020-04-18 07:33:56,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-04-18 07:33:56,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:56,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-04-18 07:33:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4967, Invalid=18289, Unknown=0, NotChecked=0, Total=23256 [2020-04-18 07:33:56,509 INFO L87 Difference]: Start difference. First operand 172 states and 470 transitions. Second operand 80 states. [2020-04-18 07:33:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:59,633 INFO L93 Difference]: Finished difference Result 380 states and 911 transitions. [2020-04-18 07:33:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-04-18 07:33:59,633 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 13 [2020-04-18 07:33:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:59,635 INFO L225 Difference]: With dead ends: 380 [2020-04-18 07:33:59,635 INFO L226 Difference]: Without dead ends: 362 [2020-04-18 07:33:59,637 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 425 SyntacticMatches, 60 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20621 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8391, Invalid=29439, Unknown=0, NotChecked=0, Total=37830 [2020-04-18 07:33:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-04-18 07:33:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 177. [2020-04-18 07:33:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-04-18 07:33:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2020-04-18 07:33:59,645 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 13 [2020-04-18 07:33:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:59,645 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2020-04-18 07:33:59,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-04-18 07:33:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2020-04-18 07:33:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:59,646 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:59,646 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:02,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:02,657 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:02,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 11 times [2020-04-18 07:34:02,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:02,658 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1653641578] [2020-04-18 07:34:02,658 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:02,659 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 41 transitions. [2020-04-18 07:34:02,659 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-04-18 07:34:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:34:02,659 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:02,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 12 times [2020-04-18 07:34:02,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:02,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363157812] [2020-04-18 07:34:02,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:02,753 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 07:34:02,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363157812] [2020-04-18 07:34:02,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170979321] [2020-04-18 07:34:02,754 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:02,799 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 07:34:02,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:02,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:34:02,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:02,836 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 07:34:02,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:02,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-18 07:34:02,837 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:02,837 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:02,839 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:34:02,839 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:02,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:02,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:02,974 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 07:34:02,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:34:02,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:34:02,974 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 16 states. [2020-04-18 07:34:03,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:03,368 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2020-04-18 07:34:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2020-04-18 07:34:03,369 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:03,369 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1653641578] [2020-04-18 07:34:03,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:03,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 07:34:03,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1653641578] [2020-04-18 07:34:03,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 07:34:03,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:03,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:34:03,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:34:03,371 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 16 states. [2020-04-18 07:34:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:03,904 INFO L93 Difference]: Finished difference Result 362 states and 929 transitions. [2020-04-18 07:34:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-18 07:34:03,905 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-18 07:34:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:34:03,908 INFO L225 Difference]: With dead ends: 362 [2020-04-18 07:34:03,908 INFO L226 Difference]: Without dead ends: 313 [2020-04-18 07:34:03,908 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 07:34:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-04-18 07:34:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 250. [2020-04-18 07:34:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-04-18 07:34:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 701 transitions. [2020-04-18 07:34:03,916 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 701 transitions. Word has length 13 [2020-04-18 07:34:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:34:03,917 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 701 transitions. [2020-04-18 07:34:03,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 07:34:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 701 transitions. [2020-04-18 07:34:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:03,917 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:34:03,917 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:34:04,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:04,121 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:34:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 71 times [2020-04-18 07:34:04,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:34:04,122 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2027104206] [2020-04-18 07:34:04,123 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:04,124 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 186 transitions. [2020-04-18 07:34:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 07:34:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:04,125 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:34:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:04,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 72 times [2020-04-18 07:34:04,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:04,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814008472] [2020-04-18 07:34:04,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:04,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814008472] [2020-04-18 07:34:04,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344482861] [2020-04-18 07:34:04,215 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 07:34:04,257 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:34:04,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:04,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:04,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:04,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:04,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:04,378 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:04,378 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:04,380 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:34:04,381 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:04,549 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:34:04,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:34:04,550 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 17 states. [2020-04-18 07:34:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:04,936 INFO L93 Difference]: Finished difference Result 130 states and 277 transitions. [2020-04-18 07:34:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 277 transitions. [2020-04-18 07:34:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:04,937 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:34:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:04,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 73 times [2020-04-18 07:34:04,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:04,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334946861] [2020-04-18 07:34:04,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:05,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334946861] [2020-04-18 07:34:05,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588857126] [2020-04-18 07:34:05,035 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 07:34:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:05,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:05,079 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:14,005 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:34:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:14,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:14,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:34:14,006 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:14,007 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:14,009 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 07:34:14,009 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:25,136 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:34:25,137 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:34:25,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:34:25,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=462, Unknown=4, NotChecked=0, Total=702 [2020-04-18 07:34:25,137 INFO L87 Difference]: Start difference. First operand 130 states and 277 transitions. Second operand 18 states. [2020-04-18 07:34:27,460 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-18 07:34:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:29,759 INFO L93 Difference]: Finished difference Result 146 states and 302 transitions. [2020-04-18 07:34:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 302 transitions. [2020-04-18 07:34:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:29,760 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:34:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:29,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 74 times [2020-04-18 07:34:29,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:29,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432222026] [2020-04-18 07:34:29,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:29,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432222026] [2020-04-18 07:34:29,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584493006] [2020-04-18 07:34:29,865 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 07:34:29,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:29,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:29,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:29,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:31,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:31,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:34:31,641 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:31,642 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:31,644 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:34:31,644 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:34,609 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:34:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:34:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=926, Unknown=9, NotChecked=0, Total=1406 [2020-04-18 07:34:34,610 INFO L87 Difference]: Start difference. First operand 146 states and 302 transitions. Second operand 18 states. [2020-04-18 07:34:35,411 WARN L192 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-18 07:34:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:37,600 INFO L93 Difference]: Finished difference Result 157 states and 316 transitions. [2020-04-18 07:34:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 316 transitions. [2020-04-18 07:34:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:37,601 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:34:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:37,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 75 times [2020-04-18 07:34:37,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:37,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477062192] [2020-04-18 07:34:37,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:37,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477062192] [2020-04-18 07:34:37,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301065827] [2020-04-18 07:34:37,718 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 07:34:37,788 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:34:37,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:37,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:37,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:38,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:38,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:38,011 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:38,013 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:38,017 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:34:38,017 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:41,376 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:34:41,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:41,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1604, Unknown=12, NotChecked=0, Total=2352 [2020-04-18 07:34:41,377 INFO L87 Difference]: Start difference. First operand 157 states and 316 transitions. Second operand 17 states. [2020-04-18 07:34:47,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:47,722 INFO L93 Difference]: Finished difference Result 170 states and 331 transitions. [2020-04-18 07:34:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 331 transitions. [2020-04-18 07:34:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:47,723 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:34:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 76 times [2020-04-18 07:34:47,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:47,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629898695] [2020-04-18 07:34:47,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:47,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629898695] [2020-04-18 07:34:47,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237620323] [2020-04-18 07:34:47,824 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 07:34:47,867 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:47,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:47,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:47,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:47,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:47,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:47,988 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:47,989 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:47,991 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 07:34:47,991 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:48,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:48,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:48,551 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:34:48,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:34:48,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1271, Invalid=3269, Unknown=16, NotChecked=0, Total=4556 [2020-04-18 07:34:48,552 INFO L87 Difference]: Start difference. First operand 170 states and 331 transitions. Second operand 19 states. [2020-04-18 07:34:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:50,221 INFO L93 Difference]: Finished difference Result 208 states and 384 transitions. [2020-04-18 07:34:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 384 transitions. [2020-04-18 07:34:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:50,222 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:34:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:50,222 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 77 times [2020-04-18 07:34:50,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:50,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975768942] [2020-04-18 07:34:50,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:50,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975768942] [2020-04-18 07:34:50,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865330451] [2020-04-18 07:34:50,352 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 07:34:50,389 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:34:50,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:50,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:50,391 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:50,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:50,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:50,516 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:50,517 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:50,519 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 07:34:50,520 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:50,586 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 14 times. [2020-04-18 07:34:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1611, Invalid=4224, Unknown=17, NotChecked=0, Total=5852 [2020-04-18 07:34:50,587 INFO L87 Difference]: Start difference. First operand 208 states and 384 transitions. Second operand 17 states. [2020-04-18 07:34:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:51,004 INFO L93 Difference]: Finished difference Result 239 states and 446 transitions. [2020-04-18 07:34:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 446 transitions. [2020-04-18 07:34:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:51,005 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:34:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 78 times [2020-04-18 07:34:51,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:51,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195204307] [2020-04-18 07:34:51,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:51,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195204307] [2020-04-18 07:34:51,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289258741] [2020-04-18 07:34:51,119 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 07:34:51,161 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:34:51,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:51,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:51,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:51,773 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 07:34:51,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:51,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:51,773 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:51,774 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:51,776 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 07:34:51,776 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:52,795 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:34:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1611, Invalid=4224, Unknown=17, NotChecked=0, Total=5852 [2020-04-18 07:34:52,796 INFO L87 Difference]: Start difference. First operand 239 states and 446 transitions. Second operand 17 states. [2020-04-18 07:34:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:53,379 INFO L93 Difference]: Finished difference Result 251 states and 463 transitions. [2020-04-18 07:34:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 463 transitions. [2020-04-18 07:34:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:53,380 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:34:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:53,380 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 79 times [2020-04-18 07:34:53,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:53,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860737267] [2020-04-18 07:34:53,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:53,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860737267] [2020-04-18 07:34:53,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234891419] [2020-04-18 07:34:53,483 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 07:34:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:53,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:53,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:00,217 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 07:35:00,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:00,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:00,218 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:00,219 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:00,221 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 07:35:00,221 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:00,319 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:35:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:00,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1611, Invalid=4224, Unknown=17, NotChecked=0, Total=5852 [2020-04-18 07:35:00,320 INFO L87 Difference]: Start difference. First operand 251 states and 463 transitions. Second operand 17 states. [2020-04-18 07:35:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:02,445 INFO L93 Difference]: Finished difference Result 258 states and 470 transitions. [2020-04-18 07:35:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 470 transitions. [2020-04-18 07:35:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:02,445 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:35:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:02,446 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 80 times [2020-04-18 07:35:02,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:02,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120221119] [2020-04-18 07:35:02,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120221119] [2020-04-18 07:35:02,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141944812] [2020-04-18 07:35:02,530 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 07:35:02,572 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:02,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:02,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:02,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:02,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:02,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:02,705 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:02,706 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:02,708 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 07:35:02,708 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:02,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:02,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:02,752 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:02,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:02,778 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:35:02,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:35:02,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1747, Invalid=4714, Unknown=19, NotChecked=0, Total=6480 [2020-04-18 07:35:02,779 INFO L87 Difference]: Start difference. First operand 258 states and 470 transitions. Second operand 19 states. [2020-04-18 07:35:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:03,874 INFO L93 Difference]: Finished difference Result 294 states and 528 transitions. [2020-04-18 07:35:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 528 transitions. [2020-04-18 07:35:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:03,875 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:35:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:03,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 81 times [2020-04-18 07:35:03,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:03,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654734414] [2020-04-18 07:35:03,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:03,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654734414] [2020-04-18 07:35:03,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333961579] [2020-04-18 07:35:03,986 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 07:35:04,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:35:04,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:04,034 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:04,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:04,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:04,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:04,175 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:04,176 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:04,178 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2020-04-18 07:35:04,178 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:04,250 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 18 times. [2020-04-18 07:35:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:04,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1933, Invalid=5704, Unknown=19, NotChecked=0, Total=7656 [2020-04-18 07:35:04,251 INFO L87 Difference]: Start difference. First operand 294 states and 528 transitions. Second operand 17 states. [2020-04-18 07:35:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:04,702 INFO L93 Difference]: Finished difference Result 308 states and 553 transitions. [2020-04-18 07:35:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 553 transitions. [2020-04-18 07:35:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:04,703 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:35:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:04,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 82 times [2020-04-18 07:35:04,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:04,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280871049] [2020-04-18 07:35:04,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:04,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280871049] [2020-04-18 07:35:04,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574388084] [2020-04-18 07:35:04,805 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 07:35:04,849 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:04,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:04,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:04,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:13,608 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:35:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:13,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:13,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:35:13,609 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:13,610 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:13,612 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 07:35:13,613 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:19,987 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:35:19,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:35:19,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1933, Invalid=5704, Unknown=19, NotChecked=0, Total=7656 [2020-04-18 07:35:19,988 INFO L87 Difference]: Start difference. First operand 308 states and 553 transitions. Second operand 18 states. [2020-04-18 07:35:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:25,712 INFO L93 Difference]: Finished difference Result 319 states and 566 transitions. [2020-04-18 07:35:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 566 transitions. [2020-04-18 07:35:25,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:25,713 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:35:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 83 times [2020-04-18 07:35:25,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:25,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579744879] [2020-04-18 07:35:25,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:25,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579744879] [2020-04-18 07:35:25,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037205753] [2020-04-18 07:35:25,805 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 07:35:25,850 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:35:25,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:25,851 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:25,852 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:26,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:26,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:26,512 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:26,513 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:26,515 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 07:35:26,515 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:26,520 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:26,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:26,701 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:35:26,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:35:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1999, Invalid=5992, Unknown=19, NotChecked=0, Total=8010 [2020-04-18 07:35:26,702 INFO L87 Difference]: Start difference. First operand 319 states and 566 transitions. Second operand 19 states. [2020-04-18 07:35:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:27,934 INFO L93 Difference]: Finished difference Result 346 states and 604 transitions. [2020-04-18 07:35:27,934 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 604 transitions. [2020-04-18 07:35:27,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:27,935 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:35:27,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:27,935 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 84 times [2020-04-18 07:35:27,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:27,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144518028] [2020-04-18 07:35:27,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:28,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144518028] [2020-04-18 07:35:28,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396920812] [2020-04-18 07:35:28,038 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 07:35:28,079 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:35:28,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:28,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:28,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:28,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:28,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:28,202 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:28,203 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:28,205 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 07:35:28,205 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:28,284 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 07:35:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2180, Invalid=6921, Unknown=19, NotChecked=0, Total=9120 [2020-04-18 07:35:28,285 INFO L87 Difference]: Start difference. First operand 346 states and 604 transitions. Second operand 17 states. [2020-04-18 07:35:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:28,760 INFO L93 Difference]: Finished difference Result 355 states and 618 transitions. [2020-04-18 07:35:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 618 transitions. [2020-04-18 07:35:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:28,761 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:35:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 85 times [2020-04-18 07:35:28,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:28,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086101464] [2020-04-18 07:35:28,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:28,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086101464] [2020-04-18 07:35:28,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722098232] [2020-04-18 07:35:28,841 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 07:35:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:28,884 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:28,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:29,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:29,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:29,561 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:29,562 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:29,565 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 07:35:29,565 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:29,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:29,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:30,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:30,787 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 07:35:30,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:35:30,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2261, Invalid=7226, Unknown=19, NotChecked=0, Total=9506 [2020-04-18 07:35:30,789 INFO L87 Difference]: Start difference. First operand 355 states and 618 transitions. Second operand 19 states. [2020-04-18 07:35:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:32,125 INFO L93 Difference]: Finished difference Result 379 states and 647 transitions. [2020-04-18 07:35:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 647 transitions. [2020-04-18 07:35:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:32,126 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:35:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:32,126 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 86 times [2020-04-18 07:35:32,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:32,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067301894] [2020-04-18 07:35:32,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:32,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067301894] [2020-04-18 07:35:32,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916159390] [2020-04-18 07:35:32,240 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 07:35:32,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:32,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:32,286 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:32,287 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:32,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:32,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:32,406 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:32,407 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:32,409 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 50 transitions. [2020-04-18 07:35:32,409 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:32,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:32,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:32,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:32,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:32,622 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 29 times. [2020-04-18 07:35:32,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:35:32,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2576, Invalid=8535, Unknown=19, NotChecked=0, Total=11130 [2020-04-18 07:35:32,623 INFO L87 Difference]: Start difference. First operand 379 states and 647 transitions. Second operand 20 states. [2020-04-18 07:35:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:33,357 INFO L93 Difference]: Finished difference Result 427 states and 722 transitions. [2020-04-18 07:35:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 722 transitions. [2020-04-18 07:35:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:33,358 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 07:35:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 87 times [2020-04-18 07:35:33,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:33,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543429388] [2020-04-18 07:35:33,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:33,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543429388] [2020-04-18 07:35:33,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452061513] [2020-04-18 07:35:33,431 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 07:35:33,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:35:33,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:33,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:33,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:40,190 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:35:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:40,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:40,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:35:40,191 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:40,192 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:40,194 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 40 transitions. [2020-04-18 07:35:40,194 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:40,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:40,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:49,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:49,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:36:11,901 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 20 times. [2020-04-18 07:36:11,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:36:11,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2893, Invalid=9520, Unknown=19, NotChecked=0, Total=12432 [2020-04-18 07:36:11,902 INFO L87 Difference]: Start difference. First operand 427 states and 722 transitions. Second operand 19 states. [2020-04-18 07:36:17,314 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 30 DAG size of output: 27 Received shutdown request... [2020-04-18 07:36:22,273 WARN L209 SmtUtils]: Removed 2 from assertion stack Cannot interrupt operation gracefully because timeout expired. Forcing shutdown