/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 11:47:40,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 11:47:40,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 11:47:40,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 11:47:40,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 11:47:40,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 11:47:40,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 11:47:40,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 11:47:40,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 11:47:40,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 11:47:40,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 11:47:40,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 11:47:40,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 11:47:40,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 11:47:40,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 11:47:40,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 11:47:40,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 11:47:40,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 11:47:40,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 11:47:40,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 11:47:41,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 11:47:41,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 11:47:41,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 11:47:41,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 11:47:41,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 11:47:41,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 11:47:41,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 11:47:41,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 11:47:41,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 11:47:41,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 11:47:41,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 11:47:41,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 11:47:41,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 11:47:41,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 11:47:41,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 11:47:41,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 11:47:41,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 11:47:41,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 11:47:41,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 11:47:41,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 11:47:41,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 11:47:41,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf [2020-04-18 11:47:41,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 11:47:41,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 11:47:41,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 11:47:41,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 11:47:41,032 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 11:47:41,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 11:47:41,033 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 11:47:41,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 11:47:41,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 11:47:41,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 11:47:41,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 11:47:41,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 11:47:41,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 11:47:41,034 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 11:47:41,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 11:47:41,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 11:47:41,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 11:47:41,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 11:47:41,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 11:47:41,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 11:47:41,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 11:47:41,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:47:41,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 11:47:41,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 11:47:41,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 11:47:41,037 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 11:47:41,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 11:47:41,037 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 11:47:41,037 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 11:47:41,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 11:47:41,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 11:47:41,329 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 11:47:41,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 11:47:41,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 11:47:41,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 11:47:41,353 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 11:47:41,354 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-04-18 11:47:41,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb4308124/c89ceac17f524a359f7c1eb229dbb816/FLAG7e8bec752 [2020-04-18 11:47:41,998 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 11:47:41,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-04-18 11:47:42,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb4308124/c89ceac17f524a359f7c1eb229dbb816/FLAG7e8bec752 [2020-04-18 11:47:42,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb4308124/c89ceac17f524a359f7c1eb229dbb816 [2020-04-18 11:47:42,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 11:47:42,323 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 11:47:42,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:42,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 11:47:42,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 11:47:42,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f06879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42, skipping insertion in model container [2020-04-18 11:47:42,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 11:47:42,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 11:47:42,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:42,972 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 11:47:43,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:43,130 INFO L208 MainTranslator]: Completed translation [2020-04-18 11:47:43,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43 WrapperNode [2020-04-18 11:47:43,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:43,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:43,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 11:47:43,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 11:47:43,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:43,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 11:47:43,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 11:47:43,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 11:47:43,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... [2020-04-18 11:47:43,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 11:47:43,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 11:47:43,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 11:47:43,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 11:47:43,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:47:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 11:47:43,298 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 11:47:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 11:47:43,299 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 11:47:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 11:47:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 11:47:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 11:47:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 11:47:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 11:47:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 11:47:43,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 11:47:43,301 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 11:47:43,673 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 11:47:43,673 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 11:47:43,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:43 BoogieIcfgContainer [2020-04-18 11:47:43,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 11:47:43,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 11:47:43,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 11:47:43,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 11:47:43,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 11:47:42" (1/3) ... [2020-04-18 11:47:43,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3011bb40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:43, skipping insertion in model container [2020-04-18 11:47:43,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:43" (2/3) ... [2020-04-18 11:47:43,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3011bb40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:43, skipping insertion in model container [2020-04-18 11:47:43,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:43" (3/3) ... [2020-04-18 11:47:43,685 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-04-18 11:47:43,695 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 11:47:43,696 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 11:47:43,702 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 11:47:43,703 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 11:47:43,728 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,729 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,729 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,729 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,730 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,730 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,730 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,730 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,731 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,731 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,731 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,732 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,732 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,732 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,732 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,733 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,733 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,733 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,734 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,734 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,734 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,735 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,735 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,735 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,735 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,736 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,736 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,736 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,737 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,737 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,741 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,741 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,742 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,742 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,742 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,743 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,748 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,749 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,749 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,749 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,750 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,750 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,768 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 11:47:43,788 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 11:47:43,788 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 11:47:43,788 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 11:47:43,788 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 11:47:43,788 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 11:47:43,788 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 11:47:43,789 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 11:47:43,789 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 11:47:43,803 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,805 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,842 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 11:47:43,842 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:47:43,848 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 11:47:43,851 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,868 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 11:47:43,869 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:47:43,870 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 11:47:43,872 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-18 11:47:43,873 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 11:47:45,013 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-18 11:47:45,097 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-18 11:47:45,098 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-18 11:47:45,102 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-18 11:47:45,117 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 11:47:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:47:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:47:45,129 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:45,130 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 11:47:45,131 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-18 11:47:45,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:45,143 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [945118388] [2020-04-18 11:47:45,156 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,170 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:47:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 11:47:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:47:45,173 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 2 times [2020-04-18 11:47:45,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828397484] [2020-04-18 11:47:45,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828397484] [2020-04-18 11:47:45,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:45,459 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,459 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,461 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:47:45,462 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,481 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:47:45,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:47:45,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 11:47:45,488 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 11:47:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,510 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 11:47:45,510 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 11:47:45,510 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:45,511 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [945118388] [2020-04-18 11:47:45,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:45,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:47:45,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [945118388] [2020-04-18 11:47:45,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 11:47:45,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:45,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:47:45,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,521 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 11:47:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,592 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-18 11:47:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 11:47:45,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 11:47:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:45,606 INFO L225 Difference]: With dead ends: 83 [2020-04-18 11:47:45,607 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 11:47:45,608 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 11:47:45,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-18 11:47:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 11:47:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-18 11:47:45,657 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-18 11:47:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:45,657 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-18 11:47:45,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 11:47:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-18 11:47:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,659 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:45,659 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:45,659 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-18 11:47:45,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:45,660 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [168125470] [2020-04-18 11:47:45,661 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,662 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 11:47:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 11:47:45,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,663 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,663 INFO L82 PathProgramCache]: Analyzing trace with hash 235305767, now seen corresponding path program 2 times [2020-04-18 11:47:45,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56270766] [2020-04-18 11:47:45,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56270766] [2020-04-18 11:47:45,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:45,767 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,768 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,771 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 18 transitions. [2020-04-18 11:47:45,771 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,803 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:45,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:47:45,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,804 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 11:47:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,842 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 11:47:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 11:47:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,843 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,843 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 3 times [2020-04-18 11:47:45,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154771314] [2020-04-18 11:47:45,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154771314] [2020-04-18 11:47:45,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:47:45,963 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,964 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,965 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 11:47:45,966 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,978 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:45,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:47:45,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:45,979 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 5 states. [2020-04-18 11:47:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,011 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 11:47:46,011 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 11:47:46,011 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:46,012 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [168125470] [2020-04-18 11:47:46,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:46,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:47:46,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [168125470] [2020-04-18 11:47:46,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 11:47:46,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:47:46,014 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 6 states. [2020-04-18 11:47:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,187 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-18 11:47:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 11:47:46,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 11:47:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:46,189 INFO L225 Difference]: With dead ends: 80 [2020-04-18 11:47:46,189 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 11:47:46,191 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 11:47:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-18 11:47:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 11:47:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-18 11:47:46,200 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-18 11:47:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:46,201 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-18 11:47:46,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 11:47:46,202 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-18 11:47:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:46,203 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:46,203 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:46,203 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,204 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-18 11:47:46,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:46,204 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1401213401] [2020-04-18 11:47:46,205 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,205 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 11:47:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-04-18 11:47:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:46,206 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 2 times [2020-04-18 11:47:46,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258346880] [2020-04-18 11:47:46,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258346880] [2020-04-18 11:47:46,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:47:46,282 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,283 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,284 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-04-18 11:47:46,284 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,328 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:46,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:46,329 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2020-04-18 11:47:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,354 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-04-18 11:47:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-04-18 11:47:46,354 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:46,355 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1401213401] [2020-04-18 11:47:46,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:46,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:47:46,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1401213401] [2020-04-18 11:47:46,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 11:47:46,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:46,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:46,357 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 6 states. [2020-04-18 11:47:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,389 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-04-18 11:47:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 11:47:46,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 11:47:46,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:46,392 INFO L225 Difference]: With dead ends: 83 [2020-04-18 11:47:46,392 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 11:47:46,393 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 11:47:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-04-18 11:47:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 11:47:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-18 11:47:46,402 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-18 11:47:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:46,403 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-18 11:47:46,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 11:47:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-18 11:47:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:46,404 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:46,404 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 4 times [2020-04-18 11:47:46,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:46,405 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [525323348] [2020-04-18 11:47:46,406 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,406 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 11:47:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:47:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,407 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1295455160, now seen corresponding path program 5 times [2020-04-18 11:47:46,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534211317] [2020-04-18 11:47:46,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:47:46,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534211317] [2020-04-18 11:47:46,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:46,487 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,490 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,492 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:46,492 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,528 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 11:47:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:46,530 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-04-18 11:47:46,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,584 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2020-04-18 11:47:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2020-04-18 11:47:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,585 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1294792070, now seen corresponding path program 6 times [2020-04-18 11:47:46,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633753595] [2020-04-18 11:47:46,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633753595] [2020-04-18 11:47:46,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63406900] [2020-04-18 11:47:46,683 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:46,748 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:46,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:46,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 11:47:46,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:46,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:46,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-04-18 11:47:46,839 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,840 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,841 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2020-04-18 11:47:46,842 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,912 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:47:46,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:46,912 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2020-04-18 11:47:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,981 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 11:47:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 11:47:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,982 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:46,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 7 times [2020-04-18 11:47:46,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530133786] [2020-04-18 11:47:46,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:47,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530133786] [2020-04-18 11:47:47,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91035068] [2020-04-18 11:47:47,099 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:47,159 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:47:47,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:47,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:47,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:47,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-18 11:47:47,248 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:47,249 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:47,250 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:47,251 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:47,290 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:47,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:47:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:47:47,291 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 10 states. [2020-04-18 11:47:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:47,350 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 11:47:47,350 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 11:47:47,350 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:47,351 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [525323348] [2020-04-18 11:47:47,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:47,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:47,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [525323348] [2020-04-18 11:47:47,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:47:47,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:47,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:47,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:47,354 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 12 states. [2020-04-18 11:47:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:47,584 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-18 11:47:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:47:47,585 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 11:47:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:47,586 INFO L225 Difference]: With dead ends: 101 [2020-04-18 11:47:47,586 INFO L226 Difference]: Without dead ends: 96 [2020-04-18 11:47:47,586 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:47:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-18 11:47:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-18 11:47:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 11:47:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-18 11:47:47,596 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-18 11:47:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:47,599 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-18 11:47:47,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:47:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-18 11:47:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:47,600 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:47,601 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:48,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:48,009 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-18 11:47:48,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:48,011 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [278679382] [2020-04-18 11:47:48,012 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,012 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 11:47:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:48,013 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:48,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 4 times [2020-04-18 11:47:48,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835301204] [2020-04-18 11:47:48,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835301204] [2020-04-18 11:47:48,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572256913] [2020-04-18 11:47:48,101 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:48,150 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:47:48,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:48,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:47:48,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:48,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-18 11:47:48,243 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,244 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,245 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-04-18 11:47:48,245 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,376 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:48,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:48,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:47:48,377 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 12 states. [2020-04-18 11:47:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,441 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2020-04-18 11:47:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-04-18 11:47:48,441 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:48,442 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [278679382] [2020-04-18 11:47:48,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:48,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:48,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [278679382] [2020-04-18 11:47:48,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:47:48,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:48,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:48,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:48,444 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 12 states. [2020-04-18 11:47:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,530 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-04-18 11:47:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 11:47:48,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 11:47:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:48,532 INFO L225 Difference]: With dead ends: 104 [2020-04-18 11:47:48,532 INFO L226 Difference]: Without dead ends: 98 [2020-04-18 11:47:48,533 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-18 11:47:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-04-18 11:47:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 11:47:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-18 11:47:48,541 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 9 [2020-04-18 11:47:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:48,542 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-18 11:47:48,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:47:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-18 11:47:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,543 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:48,543 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:48,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:48,756 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-18 11:47:48,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:48,758 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1834925453] [2020-04-18 11:47:48,759 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,760 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 11:47:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 11:47:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,761 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 2 times [2020-04-18 11:47:48,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182609979] [2020-04-18 11:47:48,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182609979] [2020-04-18 11:47:48,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:48,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:48,850 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,851 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,853 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-04-18 11:47:48,853 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,883 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:48,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:48,884 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-04-18 11:47:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,947 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2020-04-18 11:47:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 79 transitions. [2020-04-18 11:47:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,947 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 3 times [2020-04-18 11:47:48,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257602589] [2020-04-18 11:47:48,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257602589] [2020-04-18 11:47:49,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:49,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:49,009 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:49,010 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,012 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:49,012 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:49,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,038 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:49,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:47:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:47:49,039 INFO L87 Difference]: Start difference. First operand 45 states and 79 transitions. Second operand 7 states. [2020-04-18 11:47:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,114 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2020-04-18 11:47:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 83 transitions. [2020-04-18 11:47:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:49,114 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-18 11:47:49,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:49,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382253504] [2020-04-18 11:47:49,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382253504] [2020-04-18 11:47:49,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:49,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:49,165 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:49,166 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,167 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 11:47:49,167 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:49,200 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:47:49,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:49,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:47:49,200 INFO L87 Difference]: Start difference. First operand 50 states and 83 transitions. Second operand 6 states. [2020-04-18 11:47:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,270 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2020-04-18 11:47:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2020-04-18 11:47:49,271 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:49,271 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1834925453] [2020-04-18 11:47:49,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:49,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:49,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1834925453] [2020-04-18 11:47:49,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 11:47:49,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:49,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:49,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:47:49,274 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 11 states. [2020-04-18 11:47:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,381 INFO L93 Difference]: Finished difference Result 124 states and 288 transitions. [2020-04-18 11:47:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 11:47:49,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-18 11:47:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:49,383 INFO L225 Difference]: With dead ends: 124 [2020-04-18 11:47:49,383 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 11:47:49,383 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 11:47:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-04-18 11:47:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-18 11:47:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 210 transitions. [2020-04-18 11:47:49,394 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 210 transitions. Word has length 10 [2020-04-18 11:47:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:49,394 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 210 transitions. [2020-04-18 11:47:49,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 11:47:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 210 transitions. [2020-04-18 11:47:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:49,395 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:49,395 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:49,395 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:49,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 5 times [2020-04-18 11:47:49,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:49,396 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2056209957] [2020-04-18 11:47:49,397 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,397 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 11:47:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:49,398 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-18 11:47:49,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:49,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297331236] [2020-04-18 11:47:49,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297331236] [2020-04-18 11:47:49,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907495634] [2020-04-18 11:47:49,486 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:49,552 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:49,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:49,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:49,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:49,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:49,675 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:49,676 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,677 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 11:47:49,677 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:49,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,752 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,899 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:49,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,925 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:47:49,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:47:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:47:49,926 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 16 states. [2020-04-18 11:47:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,034 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-04-18 11:47:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-04-18 11:47:50,034 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:50,035 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2056209957] [2020-04-18 11:47:50,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:50,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:50,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2056209957] [2020-04-18 11:47:50,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:47:50,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:50,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:47:50,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:50,036 INFO L87 Difference]: Start difference. First operand 87 states and 210 transitions. Second operand 16 states. [2020-04-18 11:47:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,112 INFO L93 Difference]: Finished difference Result 122 states and 292 transitions. [2020-04-18 11:47:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 11:47:50,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-04-18 11:47:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:50,115 INFO L225 Difference]: With dead ends: 122 [2020-04-18 11:47:50,115 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 11:47:50,115 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:50,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 11:47:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-04-18 11:47:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-18 11:47:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-04-18 11:47:50,123 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 10 [2020-04-18 11:47:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:50,123 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-04-18 11:47:50,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:47:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-04-18 11:47:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,124 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:50,124 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:50,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:50,328 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:50,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-18 11:47:50,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:50,329 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [127562457] [2020-04-18 11:47:50,330 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:50,331 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 91 transitions. [2020-04-18 11:47:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 11:47:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,333 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 6 times [2020-04-18 11:47:50,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:50,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435183870] [2020-04-18 11:47:50,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435183870] [2020-04-18 11:47:50,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089081173] [2020-04-18 11:47:50,418 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:50,483 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:50,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:50,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:50,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:50,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:50,628 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:50,629 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:50,632 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 28 transitions. [2020-04-18 11:47:50,632 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:50,754 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:50,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:50,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:50,755 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 11 states. [2020-04-18 11:47:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,888 INFO L93 Difference]: Finished difference Result 62 states and 117 transitions. [2020-04-18 11:47:50,888 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 117 transitions. [2020-04-18 11:47:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,889 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 7 times [2020-04-18 11:47:50,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:50,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014025373] [2020-04-18 11:47:50,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014025373] [2020-04-18 11:47:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996778877] [2020-04-18 11:47:50,968 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:51,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:51,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:51,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:51,141 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:51,141 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:51,143 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 11:47:51,143 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:51,185 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:51,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:51,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:51,186 INFO L87 Difference]: Start difference. First operand 62 states and 117 transitions. Second operand 11 states. [2020-04-18 11:47:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:51,318 INFO L93 Difference]: Finished difference Result 70 states and 127 transitions. [2020-04-18 11:47:51,318 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 127 transitions. [2020-04-18 11:47:51,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:51,319 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:51,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:51,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 8 times [2020-04-18 11:47:51,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:51,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127615703] [2020-04-18 11:47:51,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127615703] [2020-04-18 11:47:51,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154152778] [2020-04-18 11:47:51,402 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:51,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:51,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:51,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:51,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:51,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:51,562 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:51,563 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:51,565 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:47:51,565 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:51,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:51,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:51,636 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 15 times. [2020-04-18 11:47:51,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:51,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:47:51,638 INFO L87 Difference]: Start difference. First operand 70 states and 127 transitions. Second operand 12 states. [2020-04-18 11:47:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:51,811 INFO L93 Difference]: Finished difference Result 81 states and 141 transitions. [2020-04-18 11:47:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-04-18 11:47:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:51,812 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:51,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 9 times [2020-04-18 11:47:51,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:51,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535240489] [2020-04-18 11:47:51,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535240489] [2020-04-18 11:47:51,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918096199] [2020-04-18 11:47:51,875 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:51,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:47:51,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:51,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:51,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:52,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:52,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:52,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:52,020 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:52,021 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:52,023 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-04-18 11:47:52,023 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:52,130 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:47:52,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:52,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:47:52,131 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 11 states. [2020-04-18 11:47:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:52,460 INFO L93 Difference]: Finished difference Result 90 states and 146 transitions. [2020-04-18 11:47:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 146 transitions. [2020-04-18 11:47:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:52,460 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:47:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 10 times [2020-04-18 11:47:52,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:52,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527348012] [2020-04-18 11:47:52,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:52,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527348012] [2020-04-18 11:47:52,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238409001] [2020-04-18 11:47:52,521 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:52,579 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:47:52,579 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:52,580 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:52,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:52,643 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:52,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:52,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:52,654 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:52,654 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:52,656 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-04-18 11:47:52,656 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:52,823 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:52,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:52,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:47:52,824 INFO L87 Difference]: Start difference. First operand 90 states and 146 transitions. Second operand 11 states. [2020-04-18 11:47:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:53,070 INFO L93 Difference]: Finished difference Result 97 states and 149 transitions. [2020-04-18 11:47:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 149 transitions. [2020-04-18 11:47:53,071 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:53,072 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [127562457] [2020-04-18 11:47:53,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:53,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:53,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [127562457] [2020-04-18 11:47:53,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 11:47:53,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:53,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:47:53,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 11:47:53,075 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 28 states. [2020-04-18 11:47:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:53,432 INFO L93 Difference]: Finished difference Result 217 states and 499 transitions. [2020-04-18 11:47:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 11:47:53,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 11 [2020-04-18 11:47:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:53,436 INFO L225 Difference]: With dead ends: 217 [2020-04-18 11:47:53,437 INFO L226 Difference]: Without dead ends: 198 [2020-04-18 11:47:53,438 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1572, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 11:47:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-18 11:47:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 107. [2020-04-18 11:47:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-04-18 11:47:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 271 transitions. [2020-04-18 11:47:53,458 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 271 transitions. Word has length 11 [2020-04-18 11:47:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:53,458 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 271 transitions. [2020-04-18 11:47:53,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 11:47:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 271 transitions. [2020-04-18 11:47:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:53,460 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:53,460 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:54,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:54,468 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 11 times [2020-04-18 11:47:54,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:54,469 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1187237421] [2020-04-18 11:47:54,470 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:54,471 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 11:47:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:47:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:54,473 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 12 times [2020-04-18 11:47:54,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:54,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810399703] [2020-04-18 11:47:54,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810399703] [2020-04-18 11:47:54,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693685072] [2020-04-18 11:47:54,538 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:54,592 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:54,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:54,593 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:54,593 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:54,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:54,677 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:54,678 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:54,680 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:54,680 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:54,758 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:47:54,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:54,759 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2020-04-18 11:47:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:54,892 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2020-04-18 11:47:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 11:47:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:54,893 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 13 times [2020-04-18 11:47:54,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:54,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532566992] [2020-04-18 11:47:54,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532566992] [2020-04-18 11:47:54,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249206008] [2020-04-18 11:47:54,978 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:55,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:55,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:55,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:55,088 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:55,089 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:55,090 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 11:47:55,091 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:55,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,189 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:55,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:55,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:55,190 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 13 states. [2020-04-18 11:47:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:55,401 INFO L93 Difference]: Finished difference Result 71 states and 126 transitions. [2020-04-18 11:47:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2020-04-18 11:47:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:55,402 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:55,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 14 times [2020-04-18 11:47:55,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:55,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315259323] [2020-04-18 11:47:55,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315259323] [2020-04-18 11:47:55,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132904786] [2020-04-18 11:47:55,482 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:55,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:55,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:55,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:55,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:55,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:55,586 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:55,588 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:55,589 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 11:47:55,589 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:55,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:55,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,682 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:47:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:47:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:47:55,684 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 14 states. [2020-04-18 11:47:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:55,936 INFO L93 Difference]: Finished difference Result 79 states and 134 transitions. [2020-04-18 11:47:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 134 transitions. [2020-04-18 11:47:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:55,937 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 15 times [2020-04-18 11:47:55,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:55,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195746649] [2020-04-18 11:47:55,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:56,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195746649] [2020-04-18 11:47:56,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299660201] [2020-04-18 11:47:56,023 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:56,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:47:56,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:56,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:56,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:56,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:56,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:56,151 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:56,152 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:56,154 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 11:47:56,154 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:56,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:56,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:56,198 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:56,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:47:56,198 INFO L87 Difference]: Start difference. First operand 79 states and 134 transitions. Second operand 12 states. [2020-04-18 11:47:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:56,439 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2020-04-18 11:47:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2020-04-18 11:47:56,440 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:56,440 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1187237421] [2020-04-18 11:47:56,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:56,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:56,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1187237421] [2020-04-18 11:47:56,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 11:47:56,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:56,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 11:47:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:47:56,442 INFO L87 Difference]: Start difference. First operand 107 states and 271 transitions. Second operand 23 states. [2020-04-18 11:47:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:56,596 INFO L93 Difference]: Finished difference Result 153 states and 367 transitions. [2020-04-18 11:47:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:47:56,597 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 11 [2020-04-18 11:47:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:56,599 INFO L225 Difference]: With dead ends: 153 [2020-04-18 11:47:56,599 INFO L226 Difference]: Without dead ends: 148 [2020-04-18 11:47:56,600 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 11:47:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-18 11:47:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2020-04-18 11:47:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-18 11:47:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2020-04-18 11:47:56,607 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 11 [2020-04-18 11:47:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:56,607 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2020-04-18 11:47:56,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 11:47:56,608 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2020-04-18 11:47:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:56,608 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:56,608 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:57,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:57,417 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 7 times [2020-04-18 11:47:57,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:57,418 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1983727044] [2020-04-18 11:47:57,419 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:57,419 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 11:47:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:47:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:57,420 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:57,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 8 times [2020-04-18 11:47:57,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:57,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167709502] [2020-04-18 11:47:57,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:57,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167709502] [2020-04-18 11:47:57,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016822656] [2020-04-18 11:47:57,538 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:57,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:57,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:57,581 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:57,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:57,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:57,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:57,683 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:57,683 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:57,684 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 11:47:57,685 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:57,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,956 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:47:57,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:47:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:47:57,957 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 20 states. [2020-04-18 11:47:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:58,141 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2020-04-18 11:47:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2020-04-18 11:47:58,141 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:58,141 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1983727044] [2020-04-18 11:47:58,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:58,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:47:58,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1983727044] [2020-04-18 11:47:58,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 11:47:58,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:58,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:47:58,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:47:58,143 INFO L87 Difference]: Start difference. First operand 110 states and 273 transitions. Second operand 20 states. [2020-04-18 11:47:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:58,230 INFO L93 Difference]: Finished difference Result 158 states and 382 transitions. [2020-04-18 11:47:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 11:47:58,237 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 11 [2020-04-18 11:47:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:58,239 INFO L225 Difference]: With dead ends: 158 [2020-04-18 11:47:58,239 INFO L226 Difference]: Without dead ends: 152 [2020-04-18 11:47:58,239 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:47:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-04-18 11:47:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2020-04-18 11:47:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-18 11:47:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-04-18 11:47:58,253 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 11 [2020-04-18 11:47:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:58,253 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-04-18 11:47:58,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 11:47:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-04-18 11:47:58,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:58,254 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:58,254 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:58,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:58,458 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:58,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 16 times [2020-04-18 11:47:58,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:58,459 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [489173433] [2020-04-18 11:47:58,460 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:58,460 INFO L259 McrAutomatonBuilder]: Finished intersection with 57 states and 116 transitions. [2020-04-18 11:47:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-04-18 11:47:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:58,461 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:58,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:58,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 17 times [2020-04-18 11:47:58,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:58,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874031304] [2020-04-18 11:47:58,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874031304] [2020-04-18 11:47:58,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403116429] [2020-04-18 11:47:58,550 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:58,597 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:58,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:58,598 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:58,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:58,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:58,692 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:58,693 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:58,695 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 11:47:58,695 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:58,814 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:58,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:58,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:58,814 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 13 states. [2020-04-18 11:47:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:58,975 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2020-04-18 11:47:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2020-04-18 11:47:58,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:58,975 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:58,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 18 times [2020-04-18 11:47:58,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:58,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810023215] [2020-04-18 11:47:58,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810023215] [2020-04-18 11:47:59,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566080969] [2020-04-18 11:47:59,080 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:59,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:59,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:59,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:59,142 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:59,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:59,231 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:59,232 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:59,233 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:47:59,234 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:59,274 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:47:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:59,275 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand 13 states. [2020-04-18 11:47:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:59,458 INFO L93 Difference]: Finished difference Result 93 states and 178 transitions. [2020-04-18 11:47:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 178 transitions. [2020-04-18 11:47:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:59,459 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 19 times [2020-04-18 11:47:59,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:59,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994978735] [2020-04-18 11:47:59,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994978735] [2020-04-18 11:47:59,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008244342] [2020-04-18 11:47:59,555 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,598 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:59,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:59,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:59,710 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:59,711 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:59,713 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 11:47:59,714 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:59,776 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:47:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:59,777 INFO L87 Difference]: Start difference. First operand 93 states and 178 transitions. Second operand 13 states. [2020-04-18 11:47:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:59,991 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2020-04-18 11:47:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 188 transitions. [2020-04-18 11:47:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:59,992 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:59,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:59,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 20 times [2020-04-18 11:47:59,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:59,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591984865] [2020-04-18 11:47:59,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591984865] [2020-04-18 11:48:00,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055663262] [2020-04-18 11:48:00,091 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:00,144 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:00,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:00,146 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:00,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:00,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:00,237 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:00,238 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:00,240 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 40 transitions. [2020-04-18 11:48:00,240 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:00,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:00,310 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 21 times. [2020-04-18 11:48:00,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:48:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:48:00,311 INFO L87 Difference]: Start difference. First operand 101 states and 188 transitions. Second operand 14 states. [2020-04-18 11:48:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:00,600 INFO L93 Difference]: Finished difference Result 119 states and 214 transitions. [2020-04-18 11:48:00,600 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 214 transitions. [2020-04-18 11:48:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:00,601 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 21 times [2020-04-18 11:48:00,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:00,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325026612] [2020-04-18 11:48:00,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325026612] [2020-04-18 11:48:00,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120236850] [2020-04-18 11:48:00,677 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:00,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:48:00,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:00,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:00,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:00,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:00,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:00,857 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:00,858 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:00,860 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:48:00,860 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:00,998 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:48:00,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:00,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:48:00,999 INFO L87 Difference]: Start difference. First operand 119 states and 214 transitions. Second operand 13 states. [2020-04-18 11:48:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:01,679 INFO L93 Difference]: Finished difference Result 136 states and 231 transitions. [2020-04-18 11:48:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 231 transitions. [2020-04-18 11:48:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:01,679 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:01,680 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 22 times [2020-04-18 11:48:01,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:01,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645387985] [2020-04-18 11:48:01,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:01,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645387985] [2020-04-18 11:48:01,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660899181] [2020-04-18 11:48:01,786 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:01,844 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:01,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:01,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:01,847 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:01,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:01,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:01,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:01,920 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:01,920 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:01,922 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 11:48:01,922 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:02,077 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:02,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:02,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=1218, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:48:02,079 INFO L87 Difference]: Start difference. First operand 136 states and 231 transitions. Second operand 13 states. [2020-04-18 11:48:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:02,582 INFO L93 Difference]: Finished difference Result 152 states and 241 transitions. [2020-04-18 11:48:02,582 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 241 transitions. [2020-04-18 11:48:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:02,583 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 23 times [2020-04-18 11:48:02,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:02,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062180264] [2020-04-18 11:48:02,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:02,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062180264] [2020-04-18 11:48:02,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759535343] [2020-04-18 11:48:02,650 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:02,692 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:02,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:02,693 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:02,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:02,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:02,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:02,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:02,771 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:02,772 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:02,773 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:02,773 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:03,033 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:03,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:03,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:03,035 INFO L87 Difference]: Start difference. First operand 152 states and 241 transitions. Second operand 13 states. [2020-04-18 11:48:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:03,463 INFO L93 Difference]: Finished difference Result 164 states and 248 transitions. [2020-04-18 11:48:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2020-04-18 11:48:03,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:03,465 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [489173433] [2020-04-18 11:48:03,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:03,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:48:03,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [489173433] [2020-04-18 11:48:03,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 11:48:03,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:03,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 11:48:03,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1126, Invalid=3296, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:48:03,467 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand 41 states. [2020-04-18 11:48:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:04,347 INFO L93 Difference]: Finished difference Result 287 states and 662 transitions. [2020-04-18 11:48:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-18 11:48:04,349 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 12 [2020-04-18 11:48:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:04,352 INFO L225 Difference]: With dead ends: 287 [2020-04-18 11:48:04,352 INFO L226 Difference]: Without dead ends: 268 [2020-04-18 11:48:04,354 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 11:48:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-18 11:48:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 131. [2020-04-18 11:48:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-04-18 11:48:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-04-18 11:48:04,360 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 12 [2020-04-18 11:48:04,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:04,361 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-04-18 11:48:04,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 11:48:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-04-18 11:48:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:04,361 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:04,362 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:05,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:05,778 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:05,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:05,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 24 times [2020-04-18 11:48:05,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:05,779 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1079303161] [2020-04-18 11:48:05,779 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:05,780 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 11:48:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 11:48:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:05,781 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:05,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:05,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 25 times [2020-04-18 11:48:05,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:05,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132425028] [2020-04-18 11:48:05,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:05,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132425028] [2020-04-18 11:48:05,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525696346] [2020-04-18 11:48:05,844 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:05,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:05,891 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:05,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:05,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:05,983 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:05,983 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:05,985 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 11:48:05,985 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:06,096 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:48:06,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:06,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:48:06,097 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 13 states. [2020-04-18 11:48:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:06,321 INFO L93 Difference]: Finished difference Result 84 states and 169 transitions. [2020-04-18 11:48:06,321 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2020-04-18 11:48:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:06,321 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:48:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:06,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 26 times [2020-04-18 11:48:06,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:06,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16210157] [2020-04-18 11:48:06,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:06,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16210157] [2020-04-18 11:48:06,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078764672] [2020-04-18 11:48:06,395 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:06,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:06,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:06,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:06,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:06,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:06,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:06,552 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:06,553 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:06,556 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 11:48:06,556 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:06,622 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:06,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:06,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:48:06,623 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand 13 states. [2020-04-18 11:48:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:06,866 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2020-04-18 11:48:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2020-04-18 11:48:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:06,867 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:48:06,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:06,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 27 times [2020-04-18 11:48:06,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:06,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291368693] [2020-04-18 11:48:06,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:06,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291368693] [2020-04-18 11:48:06,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231031515] [2020-04-18 11:48:06,961 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:07,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:07,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:07,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:07,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:07,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:07,117 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:07,117 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:07,119 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 32 transitions. [2020-04-18 11:48:07,119 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:07,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:07,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:07,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:07,286 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:48:07,288 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand 15 states. [2020-04-18 11:48:07,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:07,671 INFO L93 Difference]: Finished difference Result 110 states and 201 transitions. [2020-04-18 11:48:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 201 transitions. [2020-04-18 11:48:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:07,672 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:48:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 28 times [2020-04-18 11:48:07,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:07,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248489645] [2020-04-18 11:48:07,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248489645] [2020-04-18 11:48:07,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668301340] [2020-04-18 11:48:07,786 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:07,830 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:07,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:07,831 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:07,832 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:07,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:07,922 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:07,923 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:07,924 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:07,924 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:07,969 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:07,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:07,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:48:07,970 INFO L87 Difference]: Start difference. First operand 110 states and 201 transitions. Second operand 13 states. [2020-04-18 11:48:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:08,204 INFO L93 Difference]: Finished difference Result 123 states and 221 transitions. [2020-04-18 11:48:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 221 transitions. [2020-04-18 11:48:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:08,205 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:08,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 29 times [2020-04-18 11:48:08,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:08,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33924625] [2020-04-18 11:48:08,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:08,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33924625] [2020-04-18 11:48:08,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693660603] [2020-04-18 11:48:08,273 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:08,321 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:08,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:08,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:08,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:08,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:08,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:08,430 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:08,431 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:08,433 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:08,433 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:08,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,500 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:08,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 11:48:08,501 INFO L87 Difference]: Start difference. First operand 123 states and 221 transitions. Second operand 15 states. [2020-04-18 11:48:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:09,019 INFO L93 Difference]: Finished difference Result 137 states and 239 transitions. [2020-04-18 11:48:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 239 transitions. [2020-04-18 11:48:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:09,020 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:09,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 30 times [2020-04-18 11:48:09,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:09,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128650033] [2020-04-18 11:48:09,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:09,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128650033] [2020-04-18 11:48:09,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182748088] [2020-04-18 11:48:09,122 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:09,200 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:09,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:09,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:09,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:09,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:09,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:09,355 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:09,356 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:09,359 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 11:48:09,359 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:09,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,603 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 17 times. [2020-04-18 11:48:09,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 11:48:09,605 INFO L87 Difference]: Start difference. First operand 137 states and 239 transitions. Second operand 16 states. [2020-04-18 11:48:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:10,163 INFO L93 Difference]: Finished difference Result 156 states and 263 transitions. [2020-04-18 11:48:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 263 transitions. [2020-04-18 11:48:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:10,164 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 31 times [2020-04-18 11:48:10,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:10,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675841151] [2020-04-18 11:48:10,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:10,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675841151] [2020-04-18 11:48:10,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461620150] [2020-04-18 11:48:10,250 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:10,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:10,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:10,449 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 11:48:10,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:10,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:10,450 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:10,451 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:10,453 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 11:48:10,453 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:10,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:10,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:10,572 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:48:10,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:48:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=1956, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 11:48:10,574 INFO L87 Difference]: Start difference. First operand 156 states and 263 transitions. Second operand 14 states. [2020-04-18 11:48:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:11,099 INFO L93 Difference]: Finished difference Result 161 states and 267 transitions. [2020-04-18 11:48:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2020-04-18 11:48:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:11,100 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:48:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 32 times [2020-04-18 11:48:11,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:11,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292466941] [2020-04-18 11:48:11,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:11,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292466941] [2020-04-18 11:48:11,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707321583] [2020-04-18 11:48:11,175 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:11,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:11,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:11,215 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:11,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:11,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:11,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:11,308 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:11,309 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:11,310 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:11,310 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:11,397 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=2621, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:11,398 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand 13 states. [2020-04-18 11:48:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:11,855 INFO L93 Difference]: Finished difference Result 173 states and 276 transitions. [2020-04-18 11:48:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 276 transitions. [2020-04-18 11:48:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:11,856 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:48:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:11,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 33 times [2020-04-18 11:48:11,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:11,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370562219] [2020-04-18 11:48:11,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:11,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370562219] [2020-04-18 11:48:11,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420535016] [2020-04-18 11:48:11,916 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:11,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:11,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:11,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 11:48:11,963 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:12,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:12,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-04-18 11:48:12,029 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:12,030 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:12,032 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-04-18 11:48:12,032 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:12,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:12,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:12,229 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:48:12,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:12,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=3549, Unknown=0, NotChecked=0, Total=4692 [2020-04-18 11:48:12,232 INFO L87 Difference]: Start difference. First operand 173 states and 276 transitions. Second operand 13 states. [2020-04-18 11:48:12,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:12,822 INFO L93 Difference]: Finished difference Result 184 states and 285 transitions. [2020-04-18 11:48:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 285 transitions. [2020-04-18 11:48:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:12,823 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:48:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:12,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 34 times [2020-04-18 11:48:12,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:12,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057508421] [2020-04-18 11:48:12,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:12,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057508421] [2020-04-18 11:48:12,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294111728] [2020-04-18 11:48:12,888 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:12,940 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:12,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:12,941 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:12,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:12,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:13,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:13,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:13,006 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:13,007 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:13,008 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:13,008 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:13,175 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:13,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4841, Unknown=0, NotChecked=0, Total=6480 [2020-04-18 11:48:13,178 INFO L87 Difference]: Start difference. First operand 184 states and 285 transitions. Second operand 13 states. [2020-04-18 11:48:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:13,751 INFO L93 Difference]: Finished difference Result 193 states and 289 transitions. [2020-04-18 11:48:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2020-04-18 11:48:13,752 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:13,753 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1079303161] [2020-04-18 11:48:13,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:13,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:48:13,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1079303161] [2020-04-18 11:48:13,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-04-18 11:48:13,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:13,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-04-18 11:48:13,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1970, Invalid=6040, Unknown=0, NotChecked=0, Total=8010 [2020-04-18 11:48:13,757 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 52 states. [2020-04-18 11:48:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:14,884 INFO L93 Difference]: Finished difference Result 283 states and 666 transitions. [2020-04-18 11:48:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 11:48:14,885 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 12 [2020-04-18 11:48:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:14,887 INFO L225 Difference]: With dead ends: 283 [2020-04-18 11:48:14,887 INFO L226 Difference]: Without dead ends: 263 [2020-04-18 11:48:14,890 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 259 SyntacticMatches, 23 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5319 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2791, Invalid=8551, Unknown=0, NotChecked=0, Total=11342 [2020-04-18 11:48:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-18 11:48:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 136. [2020-04-18 11:48:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-18 11:48:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2020-04-18 11:48:14,896 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 12 [2020-04-18 11:48:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:14,897 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2020-04-18 11:48:14,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-04-18 11:48:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2020-04-18 11:48:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:14,897 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:14,898 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:16,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:16,905 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 9 times [2020-04-18 11:48:16,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:16,906 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1842276521] [2020-04-18 11:48:16,907 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:16,907 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 11:48:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 11:48:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:16,907 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:16,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 10 times [2020-04-18 11:48:16,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:16,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758890361] [2020-04-18 11:48:16,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:17,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758890361] [2020-04-18 11:48:17,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089305733] [2020-04-18 11:48:17,028 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:17,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:17,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:17,075 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:17,076 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:17,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:17,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:17,201 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:17,203 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:17,205 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 11:48:17,205 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:17,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:17,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:17,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:17,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,324 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:17,324 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:17,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:17,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:17,573 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:48:17,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:48:17,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:48:17,575 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 24 states. [2020-04-18 11:48:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:17,809 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2020-04-18 11:48:17,809 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-04-18 11:48:17,809 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:17,810 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1842276521] [2020-04-18 11:48:17,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:17,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:48:17,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1842276521] [2020-04-18 11:48:17,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 11:48:17,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:17,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:48:17,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:48:17,812 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand 24 states. [2020-04-18 11:48:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:17,958 INFO L93 Difference]: Finished difference Result 199 states and 487 transitions. [2020-04-18 11:48:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 11:48:17,959 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2020-04-18 11:48:17,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:17,961 INFO L225 Difference]: With dead ends: 199 [2020-04-18 11:48:17,961 INFO L226 Difference]: Without dead ends: 193 [2020-04-18 11:48:17,962 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 11:48:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-18 11:48:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2020-04-18 11:48:17,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-18 11:48:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 374 transitions. [2020-04-18 11:48:17,967 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 374 transitions. Word has length 12 [2020-04-18 11:48:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:17,967 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 374 transitions. [2020-04-18 11:48:17,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 11:48:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 374 transitions. [2020-04-18 11:48:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:17,968 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:17,968 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:18,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:18,171 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:18,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 35 times [2020-04-18 11:48:18,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:18,173 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [150718662] [2020-04-18 11:48:18,173 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:18,174 INFO L259 McrAutomatonBuilder]: Finished intersection with 72 states and 153 transitions. [2020-04-18 11:48:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-04-18 11:48:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:18,176 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:18,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 36 times [2020-04-18 11:48:18,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:18,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836089434] [2020-04-18 11:48:18,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:18,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836089434] [2020-04-18 11:48:18,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134322579] [2020-04-18 11:48:18,258 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:18,304 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:18,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:18,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:18,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:18,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:18,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:18,424 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:18,424 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:18,426 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 32 transitions. [2020-04-18 11:48:18,426 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:18,553 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:48:18,554 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 15 states. [2020-04-18 11:48:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:18,899 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2020-04-18 11:48:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 223 transitions. [2020-04-18 11:48:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:18,900 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:48:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:18,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 37 times [2020-04-18 11:48:18,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:18,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708426468] [2020-04-18 11:48:18,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:19,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708426468] [2020-04-18 11:48:19,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661334804] [2020-04-18 11:48:19,005 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:19,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:19,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:19,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:19,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:19,184 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:19,185 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:19,186 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:48:19,187 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:19,283 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:48:19,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:19,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-04-18 11:48:19,283 INFO L87 Difference]: Start difference. First operand 107 states and 223 transitions. Second operand 15 states. [2020-04-18 11:48:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:19,658 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2020-04-18 11:48:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 240 transitions. [2020-04-18 11:48:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:19,659 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:48:19,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:19,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 38 times [2020-04-18 11:48:19,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:19,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946033985] [2020-04-18 11:48:19,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:19,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946033985] [2020-04-18 11:48:19,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94958022] [2020-04-18 11:48:19,746 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:19,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:19,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:19,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:19,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:19,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:19,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:19,895 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:19,895 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:19,897 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:19,897 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:19,999 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:20,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:48:20,000 INFO L87 Difference]: Start difference. First operand 119 states and 240 transitions. Second operand 15 states. [2020-04-18 11:48:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:20,388 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 11:48:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 11:48:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:20,389 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:48:20,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:20,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 39 times [2020-04-18 11:48:20,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:20,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406359018] [2020-04-18 11:48:20,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:20,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406359018] [2020-04-18 11:48:20,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421423276] [2020-04-18 11:48:20,481 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:20,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:20,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:20,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:20,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:20,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:20,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:20,620 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:20,621 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:20,622 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:48:20,622 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:20,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:20,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:20,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:20,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:20,827 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:20,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:20,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 11:48:20,828 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 11:48:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:21,357 INFO L93 Difference]: Finished difference Result 151 states and 280 transitions. [2020-04-18 11:48:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 280 transitions. [2020-04-18 11:48:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:21,358 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:21,358 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 40 times [2020-04-18 11:48:21,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:21,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130434465] [2020-04-18 11:48:21,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:21,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130434465] [2020-04-18 11:48:21,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113232301] [2020-04-18 11:48:21,486 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:21,536 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:21,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:21,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:21,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:21,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:21,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:21,635 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:21,635 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:21,637 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:48:21,637 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:21,699 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:48:21,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:21,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 11:48:21,700 INFO L87 Difference]: Start difference. First operand 151 states and 280 transitions. Second operand 15 states. [2020-04-18 11:48:21,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:21,995 INFO L93 Difference]: Finished difference Result 173 states and 321 transitions. [2020-04-18 11:48:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 321 transitions. [2020-04-18 11:48:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:21,997 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 41 times [2020-04-18 11:48:21,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:21,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932571032] [2020-04-18 11:48:21,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:22,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932571032] [2020-04-18 11:48:22,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996096465] [2020-04-18 11:48:22,103 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:22,149 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:22,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:22,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:22,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:26,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:26,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:26,297 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:26,298 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:26,299 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:48:26,300 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:26,355 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:26,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:26,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 11:48:26,356 INFO L87 Difference]: Start difference. First operand 173 states and 321 transitions. Second operand 15 states. [2020-04-18 11:48:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:26,750 INFO L93 Difference]: Finished difference Result 181 states and 330 transitions. [2020-04-18 11:48:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 330 transitions. [2020-04-18 11:48:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:26,751 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:26,751 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 42 times [2020-04-18 11:48:26,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:26,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674229125] [2020-04-18 11:48:26,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:26,838 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 11:48:26,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674229125] [2020-04-18 11:48:26,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410521421] [2020-04-18 11:48:26,839 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:26,877 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:26,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:26,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:26,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:27,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:27,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:27,018 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:27,019 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:27,021 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:48:27,021 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:27,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:27,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:27,113 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:27,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=1964, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 11:48:27,114 INFO L87 Difference]: Start difference. First operand 181 states and 330 transitions. Second operand 17 states. [2020-04-18 11:48:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:27,853 INFO L93 Difference]: Finished difference Result 204 states and 364 transitions. [2020-04-18 11:48:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 364 transitions. [2020-04-18 11:48:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:27,854 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:48:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:27,855 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 43 times [2020-04-18 11:48:27,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:27,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937840354] [2020-04-18 11:48:27,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:27,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937840354] [2020-04-18 11:48:27,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904026979] [2020-04-18 11:48:27,968 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:28,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:28,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:28,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:28,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:28,118 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:28,119 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:28,121 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:48:28,121 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:28,178 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:48:28,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:28,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=2498, Unknown=0, NotChecked=0, Total=3306 [2020-04-18 11:48:28,179 INFO L87 Difference]: Start difference. First operand 204 states and 364 transitions. Second operand 15 states. [2020-04-18 11:48:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:28,534 INFO L93 Difference]: Finished difference Result 213 states and 378 transitions. [2020-04-18 11:48:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 378 transitions. [2020-04-18 11:48:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:28,535 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:48:28,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:28,535 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 44 times [2020-04-18 11:48:28,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:28,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009971827] [2020-04-18 11:48:28,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:28,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009971827] [2020-04-18 11:48:28,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019770616] [2020-04-18 11:48:28,619 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:28,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:28,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:28,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:28,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:28,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:28,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:28,785 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:28,786 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:28,788 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:48:28,788 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:28,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:28,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:28,900 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:48:28,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:28,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:28,901 INFO L87 Difference]: Start difference. First operand 213 states and 378 transitions. Second operand 17 states. [2020-04-18 11:48:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:29,583 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2020-04-18 11:48:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 400 transitions. [2020-04-18 11:48:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:29,584 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:48:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:29,585 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 45 times [2020-04-18 11:48:29,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:29,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758158644] [2020-04-18 11:48:29,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:29,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758158644] [2020-04-18 11:48:29,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401562733] [2020-04-18 11:48:29,700 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:29,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:48:29,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:29,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:29,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:29,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:29,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:29,949 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:29,950 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:29,953 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 43 transitions. [2020-04-18 11:48:29,953 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:29,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:30,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:30,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:30,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:30,134 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 11:48:30,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:48:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 11:48:30,135 INFO L87 Difference]: Start difference. First operand 231 states and 400 transitions. Second operand 18 states. [2020-04-18 11:48:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:30,677 INFO L93 Difference]: Finished difference Result 265 states and 451 transitions. [2020-04-18 11:48:30,677 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 451 transitions. [2020-04-18 11:48:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:30,678 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:48:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 46 times [2020-04-18 11:48:30,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:30,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257103909] [2020-04-18 11:48:30,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:30,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257103909] [2020-04-18 11:48:30,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061324842] [2020-04-18 11:48:30,770 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:30,808 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:30,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:30,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:30,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:36,999 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 11:48:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:37,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:37,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-18 11:48:37,002 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:37,003 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:37,005 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 11:48:37,005 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:37,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:37,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:41,323 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 11:48:41,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1325, Invalid=4077, Unknown=0, NotChecked=0, Total=5402 [2020-04-18 11:48:41,324 INFO L87 Difference]: Start difference. First operand 265 states and 451 transitions. Second operand 16 states. [2020-04-18 11:48:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:42,323 INFO L93 Difference]: Finished difference Result 283 states and 476 transitions. [2020-04-18 11:48:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 476 transitions. [2020-04-18 11:48:42,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:42,323 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:48:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 47 times [2020-04-18 11:48:42,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:42,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110880476] [2020-04-18 11:48:42,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:42,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110880476] [2020-04-18 11:48:42,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60421153] [2020-04-18 11:48:42,425 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:42,467 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:42,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:42,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:42,468 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:42,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:42,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:42,572 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:42,573 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:42,575 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:48:42,587 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:42,688 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:42,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1670, Invalid=5136, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 11:48:42,689 INFO L87 Difference]: Start difference. First operand 283 states and 476 transitions. Second operand 15 states. [2020-04-18 11:48:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:43,498 INFO L93 Difference]: Finished difference Result 299 states and 494 transitions. [2020-04-18 11:48:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 494 transitions. [2020-04-18 11:48:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:43,499 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:48:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 48 times [2020-04-18 11:48:43,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:43,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228405242] [2020-04-18 11:48:43,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:43,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228405242] [2020-04-18 11:48:43,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653068894] [2020-04-18 11:48:43,603 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:43,671 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:43,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:43,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:43,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:43,838 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 11:48:43,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:43,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:43,839 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:43,841 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:43,844 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:48:43,844 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:44,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:44,223 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:48:44,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:44,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2167, Invalid=6575, Unknown=0, NotChecked=0, Total=8742 [2020-04-18 11:48:44,225 INFO L87 Difference]: Start difference. First operand 299 states and 494 transitions. Second operand 16 states. [2020-04-18 11:48:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:45,078 INFO L93 Difference]: Finished difference Result 308 states and 503 transitions. [2020-04-18 11:48:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 503 transitions. [2020-04-18 11:48:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:45,080 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:48:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:45,080 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 49 times [2020-04-18 11:48:45,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:45,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925923689] [2020-04-18 11:48:45,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:45,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925923689] [2020-04-18 11:48:45,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934634329] [2020-04-18 11:48:45,181 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:45,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:45,235 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:45,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:45,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:45,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:45,358 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:45,359 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:45,361 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:48:45,361 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:45,604 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:45,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=8559, Unknown=0, NotChecked=0, Total=11342 [2020-04-18 11:48:45,605 INFO L87 Difference]: Start difference. First operand 308 states and 503 transitions. Second operand 15 states. [2020-04-18 11:48:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:46,763 INFO L93 Difference]: Finished difference Result 330 states and 529 transitions. [2020-04-18 11:48:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 529 transitions. [2020-04-18 11:48:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:46,764 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:48:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 50 times [2020-04-18 11:48:46,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:46,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066811949] [2020-04-18 11:48:46,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:46,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:46,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066811949] [2020-04-18 11:48:46,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650307159] [2020-04-18 11:48:46,846 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:46,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:46,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:46,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:46,890 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:46,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:46,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:46,989 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:46,990 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:46,991 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:46,991 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:47,069 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:47,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:47,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3506, Invalid=11256, Unknown=0, NotChecked=0, Total=14762 [2020-04-18 11:48:47,070 INFO L87 Difference]: Start difference. First operand 330 states and 529 transitions. Second operand 15 states. [2020-04-18 11:48:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:47,459 INFO L93 Difference]: Finished difference Result 341 states and 536 transitions. [2020-04-18 11:48:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2020-04-18 11:48:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:47,460 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 11:48:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 51 times [2020-04-18 11:48:47,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:47,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613895770] [2020-04-18 11:48:47,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:47,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613895770] [2020-04-18 11:48:47,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091007685] [2020-04-18 11:48:47,532 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:47,570 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:47,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:47,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:47,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:47,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:47,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:47,690 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:47,690 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:47,692 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:47,692 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:47,813 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:47,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3693, Invalid=12057, Unknown=0, NotChecked=0, Total=15750 [2020-04-18 11:48:47,815 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand 15 states. [2020-04-18 11:48:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:48,411 INFO L93 Difference]: Finished difference Result 353 states and 545 transitions. [2020-04-18 11:48:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 545 transitions. [2020-04-18 11:48:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:48,412 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 11:48:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:48,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 52 times [2020-04-18 11:48:48,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:48,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772155006] [2020-04-18 11:48:48,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:48,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772155006] [2020-04-18 11:48:48,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501439013] [2020-04-18 11:48:48,512 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:48,569 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:48,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:48,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:48,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:48,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:48,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:48,687 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:48,687 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:48,689 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:48:48,689 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:48,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:48,880 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:48:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:48,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=13681, Unknown=0, NotChecked=0, Total=17822 [2020-04-18 11:48:48,882 INFO L87 Difference]: Start difference. First operand 353 states and 545 transitions. Second operand 16 states. [2020-04-18 11:48:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:49,649 INFO L93 Difference]: Finished difference Result 365 states and 551 transitions. [2020-04-18 11:48:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 551 transitions. [2020-04-18 11:48:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:49,650 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 11:48:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 53 times [2020-04-18 11:48:49,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:49,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661138423] [2020-04-18 11:48:49,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:49,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661138423] [2020-04-18 11:48:49,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579319840] [2020-04-18 11:48:49,730 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:49,773 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:48:49,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:49,774 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:49,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:49,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:49,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:49,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:49,878 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:49,878 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:49,880 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:49,880 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:52,190 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:52,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:52,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4913, Invalid=16545, Unknown=4, NotChecked=0, Total=21462 [2020-04-18 11:48:52,192 INFO L87 Difference]: Start difference. First operand 365 states and 551 transitions. Second operand 15 states. [2020-04-18 11:48:52,581 WARN L192 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 11:48:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:54,065 INFO L93 Difference]: Finished difference Result 386 states and 564 transitions. [2020-04-18 11:48:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 564 transitions. [2020-04-18 11:48:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:54,066 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 11:48:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 54 times [2020-04-18 11:48:54,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:54,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897499191] [2020-04-18 11:48:54,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:54,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897499191] [2020-04-18 11:48:54,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444719100] [2020-04-18 11:48:54,160 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:54,199 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:54,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:54,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:54,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:54,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:54,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:54,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:54,280 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:54,281 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:54,282 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:54,282 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:54,608 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:54,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6134, Invalid=21584, Unknown=4, NotChecked=0, Total=27722 [2020-04-18 11:48:54,610 INFO L87 Difference]: Start difference. First operand 386 states and 564 transitions. Second operand 15 states. [2020-04-18 11:48:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:55,603 INFO L93 Difference]: Finished difference Result 401 states and 577 transitions. [2020-04-18 11:48:55,604 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 577 transitions. [2020-04-18 11:48:55,604 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:55,605 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [150718662] [2020-04-18 11:48:55,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:55,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:48:55,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [150718662] [2020-04-18 11:48:55,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-04-18 11:48:55,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:55,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-04-18 11:48:55,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6932, Invalid=24926, Unknown=4, NotChecked=0, Total=31862 [2020-04-18 11:48:55,608 INFO L87 Difference]: Start difference. First operand 146 states and 374 transitions. Second operand 88 states. [2020-04-18 11:48:56,575 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-04-18 11:49:00,262 WARN L192 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-04-18 11:49:00,501 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 10 [2020-04-18 11:49:03,711 WARN L192 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-04-18 11:49:05,061 WARN L192 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-18 11:49:05,788 WARN L192 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 16 [2020-04-18 11:49:07,637 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-04-18 11:49:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:10,058 INFO L93 Difference]: Finished difference Result 504 states and 1177 transitions. [2020-04-18 11:49:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-04-18 11:49:10,059 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 13 [2020-04-18 11:49:10,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:10,062 INFO L225 Difference]: With dead ends: 504 [2020-04-18 11:49:10,063 INFO L226 Difference]: Without dead ends: 456 [2020-04-18 11:49:10,065 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 893 GetRequests, 573 SyntacticMatches, 75 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32342 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=12867, Invalid=47886, Unknown=9, NotChecked=0, Total=60762 [2020-04-18 11:49:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-04-18 11:49:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 172. [2020-04-18 11:49:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-18 11:49:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 470 transitions. [2020-04-18 11:49:10,073 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 470 transitions. Word has length 13 [2020-04-18 11:49:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:10,074 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 470 transitions. [2020-04-18 11:49:10,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-04-18 11:49:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 470 transitions. [2020-04-18 11:49:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:10,075 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:10,075 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:13,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:13,885 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:49:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:13,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 55 times [2020-04-18 11:49:13,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:13,886 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [526381106] [2020-04-18 11:49:13,886 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:13,887 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 149 transitions. [2020-04-18 11:49:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 11:49:13,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:13,888 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:13,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148993, now seen corresponding path program 56 times [2020-04-18 11:49:13,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:13,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270165458] [2020-04-18 11:49:13,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:13,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270165458] [2020-04-18 11:49:13,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84191741] [2020-04-18 11:49:13,970 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:14,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:14,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:14,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:14,024 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:14,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:14,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:14,144 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:14,145 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:14,146 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:49:14,146 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:14,277 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:49:14,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:14,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:49:14,278 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 15 states. [2020-04-18 11:49:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:14,574 INFO L93 Difference]: Finished difference Result 106 states and 221 transitions. [2020-04-18 11:49:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2020-04-18 11:49:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:14,574 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:49:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:14,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 57 times [2020-04-18 11:49:14,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:14,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872022448] [2020-04-18 11:49:14,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:14,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872022448] [2020-04-18 11:49:14,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341274672] [2020-04-18 11:49:14,662 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:14,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:49:14,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:14,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:14,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:14,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:14,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:14,807 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:14,808 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:14,809 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:49:14,810 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:14,917 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:14,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:14,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:49:14,918 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand 15 states. [2020-04-18 11:49:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:15,313 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2020-04-18 11:49:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 239 transitions. [2020-04-18 11:49:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:15,314 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:49:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:15,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 58 times [2020-04-18 11:49:15,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:15,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102312321] [2020-04-18 11:49:15,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:15,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102312321] [2020-04-18 11:49:15,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180089556] [2020-04-18 11:49:15,418 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:15,474 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:15,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:15,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:15,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:15,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:15,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:15,625 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:15,626 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:15,628 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:49:15,629 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:15,768 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:15,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:15,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 11:49:15,769 INFO L87 Difference]: Start difference. First operand 117 states and 239 transitions. Second operand 15 states. [2020-04-18 11:49:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:16,204 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 11:49:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 11:49:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:16,205 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:49:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 59 times [2020-04-18 11:49:16,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:16,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089197886] [2020-04-18 11:49:16,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:16,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089197886] [2020-04-18 11:49:16,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515560311] [2020-04-18 11:49:16,324 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:16,379 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:49:16,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:16,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:16,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:16,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:16,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:16,497 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:16,498 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:16,499 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:49:16,499 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:16,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:16,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:16,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:16,701 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=1708, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 11:49:16,702 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 11:49:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:17,333 INFO L93 Difference]: Finished difference Result 156 states and 295 transitions. [2020-04-18 11:49:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 295 transitions. [2020-04-18 11:49:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:17,334 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:49:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:17,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 60 times [2020-04-18 11:49:17,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:17,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309103653] [2020-04-18 11:49:17,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:17,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309103653] [2020-04-18 11:49:17,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230086460] [2020-04-18 11:49:17,424 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:17,469 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:17,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:17,470 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:17,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:17,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:17,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:17,568 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:17,568 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:17,570 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:49:17,570 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:17,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:17,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:17,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:17,686 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:17,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:17,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=2478, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 11:49:17,687 INFO L87 Difference]: Start difference. First operand 156 states and 295 transitions. Second operand 17 states. [2020-04-18 11:49:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:18,265 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2020-04-18 11:49:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 302 transitions. [2020-04-18 11:49:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:18,266 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:49:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:18,267 INFO L82 PathProgramCache]: Analyzing trace with hash 9426703, now seen corresponding path program 61 times [2020-04-18 11:49:18,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:18,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8394928] [2020-04-18 11:49:18,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:18,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8394928] [2020-04-18 11:49:18,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772325129] [2020-04-18 11:49:18,358 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:18,401 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:18,402 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:18,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:18,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:18,525 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:18,526 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:18,528 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:18,528 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:18,584 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:18,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:18,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3064, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 11:49:18,585 INFO L87 Difference]: Start difference. First operand 164 states and 302 transitions. Second operand 15 states. [2020-04-18 11:49:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:18,904 INFO L93 Difference]: Finished difference Result 182 states and 332 transitions. [2020-04-18 11:49:18,904 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 332 transitions. [2020-04-18 11:49:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:18,905 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:49:18,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:18,905 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 62 times [2020-04-18 11:49:18,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:18,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253940874] [2020-04-18 11:49:18,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:19,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253940874] [2020-04-18 11:49:19,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080893624] [2020-04-18 11:49:19,007 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:19,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:19,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:19,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:19,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:19,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:19,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:19,144 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:19,145 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:19,146 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:19,146 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:19,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:19,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:19,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:19,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:19,211 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:19,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:49:19,212 INFO L87 Difference]: Start difference. First operand 182 states and 332 transitions. Second operand 17 states. [2020-04-18 11:49:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:19,840 INFO L93 Difference]: Finished difference Result 201 states and 361 transitions. [2020-04-18 11:49:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 361 transitions. [2020-04-18 11:49:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:19,841 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:49:19,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:19,841 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 63 times [2020-04-18 11:49:19,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:19,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350349314] [2020-04-18 11:49:19,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:19,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350349314] [2020-04-18 11:49:19,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932332570] [2020-04-18 11:49:19,917 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:19,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:19,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:19,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:19,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:20,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:20,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:20,061 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:20,062 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:20,063 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:49:20,064 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:20,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:20,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:20,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:20,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:20,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:20,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:20,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:20,191 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:49:20,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:20,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=3978, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 11:49:20,193 INFO L87 Difference]: Start difference. First operand 201 states and 361 transitions. Second operand 19 states. [2020-04-18 11:49:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:21,260 INFO L93 Difference]: Finished difference Result 237 states and 410 transitions. [2020-04-18 11:49:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 410 transitions. [2020-04-18 11:49:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:21,261 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:49:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:21,261 INFO L82 PathProgramCache]: Analyzing trace with hash 646656193, now seen corresponding path program 64 times [2020-04-18 11:49:21,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:21,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88354984] [2020-04-18 11:49:21,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:21,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88354984] [2020-04-18 11:49:21,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955138330] [2020-04-18 11:49:21,341 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:21,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:21,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:21,384 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:21,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:21,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:21,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:21,485 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:21,486 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:21,488 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 39 transitions. [2020-04-18 11:49:21,489 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:21,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:21,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:21,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,747 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 11:49:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:49:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=5905, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 11:49:21,748 INFO L87 Difference]: Start difference. First operand 237 states and 410 transitions. Second operand 20 states. [2020-04-18 11:49:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:22,380 INFO L93 Difference]: Finished difference Result 268 states and 455 transitions. [2020-04-18 11:49:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 455 transitions. [2020-04-18 11:49:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:22,381 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:49:22,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 65 times [2020-04-18 11:49:22,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:22,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591566854] [2020-04-18 11:49:22,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:22,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591566854] [2020-04-18 11:49:22,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270435151] [2020-04-18 11:49:22,446 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:22,485 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:22,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:22,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:22,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:22,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:22,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:22,579 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:22,579 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:22,581 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:22,581 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:22,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:22,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,839 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:49:22,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:49:22,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=7200, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 11:49:22,841 INFO L87 Difference]: Start difference. First operand 268 states and 455 transitions. Second operand 18 states. [2020-04-18 11:49:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:23,654 INFO L93 Difference]: Finished difference Result 284 states and 475 transitions. [2020-04-18 11:49:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 475 transitions. [2020-04-18 11:49:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:23,655 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:49:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:23,656 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 66 times [2020-04-18 11:49:23,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:23,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058567356] [2020-04-18 11:49:23,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:23,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058567356] [2020-04-18 11:49:23,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442692418] [2020-04-18 11:49:23,745 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:23,789 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:23,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:23,791 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:23,791 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:23,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:23,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:23,891 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:23,892 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:23,893 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:49:23,893 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:24,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:24,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:24,114 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:49:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=8955, Unknown=0, NotChecked=0, Total=11556 [2020-04-18 11:49:24,115 INFO L87 Difference]: Start difference. First operand 284 states and 475 transitions. Second operand 16 states. [2020-04-18 11:49:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:24,965 INFO L93 Difference]: Finished difference Result 303 states and 492 transitions. [2020-04-18 11:49:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 492 transitions. [2020-04-18 11:49:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:24,967 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:49:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:24,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 67 times [2020-04-18 11:49:24,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:24,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284462630] [2020-04-18 11:49:24,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:25,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284462630] [2020-04-18 11:49:25,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191234218] [2020-04-18 11:49:25,068 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:25,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:25,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:25,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:25,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:25,216 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:25,216 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:25,217 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:49:25,218 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:25,293 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:49:25,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3020, Invalid=10552, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 11:49:25,295 INFO L87 Difference]: Start difference. First operand 303 states and 492 transitions. Second operand 15 states. [2020-04-18 11:49:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:25,993 INFO L93 Difference]: Finished difference Result 326 states and 515 transitions. [2020-04-18 11:49:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 515 transitions. [2020-04-18 11:49:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:25,994 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:49:25,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:25,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 68 times [2020-04-18 11:49:25,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:25,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101152784] [2020-04-18 11:49:25,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:26,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101152784] [2020-04-18 11:49:26,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794702950] [2020-04-18 11:49:26,069 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:26,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:26,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:26,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:26,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:26,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:26,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:26,198 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:26,198 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:26,200 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:49:26,200 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:26,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:26,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:26,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:26,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:26,334 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 11:49:26,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:26,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3356, Invalid=11896, Unknown=0, NotChecked=0, Total=15252 [2020-04-18 11:49:26,336 INFO L87 Difference]: Start difference. First operand 326 states and 515 transitions. Second operand 17 states. [2020-04-18 11:49:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:27,272 INFO L93 Difference]: Finished difference Result 350 states and 530 transitions. [2020-04-18 11:49:27,272 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2020-04-18 11:49:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:27,273 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:49:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 69 times [2020-04-18 11:49:27,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:27,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439663290] [2020-04-18 11:49:27,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:27,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439663290] [2020-04-18 11:49:27,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56946919] [2020-04-18 11:49:27,380 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:27,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:27,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:27,425 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-18 11:49:27,426 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:27,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:27,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:27,533 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:27,534 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:27,536 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:49:27,536 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:27,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:27,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:27,940 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:27,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:27,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3977, Invalid=15763, Unknown=0, NotChecked=0, Total=19740 [2020-04-18 11:49:27,942 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand 19 states. [2020-04-18 11:49:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:29,651 INFO L93 Difference]: Finished difference Result 370 states and 543 transitions. [2020-04-18 11:49:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 543 transitions. [2020-04-18 11:49:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:29,652 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:49:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 70 times [2020-04-18 11:49:29,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:29,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888627286] [2020-04-18 11:49:29,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:29,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888627286] [2020-04-18 11:49:29,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224537830] [2020-04-18 11:49:29,719 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:29,761 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:29,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:29,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:29,762 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:29,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:29,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:29,872 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:29,873 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:29,875 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:49:29,875 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:30,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:30,117 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:49:30,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:30,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5196, Invalid=20886, Unknown=0, NotChecked=0, Total=26082 [2020-04-18 11:49:30,118 INFO L87 Difference]: Start difference. First operand 370 states and 543 transitions. Second operand 16 states. [2020-04-18 11:49:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:31,068 INFO L93 Difference]: Finished difference Result 371 states and 543 transitions. [2020-04-18 11:49:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 543 transitions. [2020-04-18 11:49:31,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:31,070 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [526381106] [2020-04-18 11:49:31,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:31,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:49:31,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [526381106] [2020-04-18 11:49:31,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-04-18 11:49:31,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:31,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-04-18 11:49:31,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5684, Invalid=22708, Unknown=0, NotChecked=0, Total=28392 [2020-04-18 11:49:31,073 INFO L87 Difference]: Start difference. First operand 172 states and 470 transitions. Second operand 86 states. [2020-04-18 11:49:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:35,330 INFO L93 Difference]: Finished difference Result 434 states and 1036 transitions. [2020-04-18 11:49:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-04-18 11:49:35,330 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 13 [2020-04-18 11:49:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:35,333 INFO L225 Difference]: With dead ends: 434 [2020-04-18 11:49:35,333 INFO L226 Difference]: Without dead ends: 410 [2020-04-18 11:49:35,335 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 419 SyntacticMatches, 56 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26212 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=9807, Invalid=40593, Unknown=0, NotChecked=0, Total=50400 [2020-04-18 11:49:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-04-18 11:49:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 191. [2020-04-18 11:49:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-04-18 11:49:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 514 transitions. [2020-04-18 11:49:35,343 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 514 transitions. Word has length 13 [2020-04-18 11:49:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:35,344 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 514 transitions. [2020-04-18 11:49:35,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-04-18 11:49:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 514 transitions. [2020-04-18 11:49:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:35,344 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:35,345 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:38,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:38,355 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:49:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 71 times [2020-04-18 11:49:38,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:38,357 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1424433283] [2020-04-18 11:49:38,357 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:38,358 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 186 transitions. [2020-04-18 11:49:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 11:49:38,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:38,359 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 72 times [2020-04-18 11:49:38,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:38,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184758472] [2020-04-18 11:49:38,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:38,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184758472] [2020-04-18 11:49:38,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903119787] [2020-04-18 11:49:38,461 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:38,502 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:38,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:38,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:38,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:38,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:38,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:38,628 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:38,629 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:38,631 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:49:38,631 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:38,825 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:49:38,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:38,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:49:38,825 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 17 states. [2020-04-18 11:49:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:39,188 INFO L93 Difference]: Finished difference Result 130 states and 277 transitions. [2020-04-18 11:49:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 277 transitions. [2020-04-18 11:49:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:39,189 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:49:39,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:39,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 73 times [2020-04-18 11:49:39,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:39,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270993916] [2020-04-18 11:49:39,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:39,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270993916] [2020-04-18 11:49:39,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992539166] [2020-04-18 11:49:39,291 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:39,335 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:39,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:40,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:40,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:40,026 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:40,026 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:40,029 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 11:49:40,029 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:40,583 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:40,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:40,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=435, Unknown=1, NotChecked=0, Total=650 [2020-04-18 11:49:40,583 INFO L87 Difference]: Start difference. First operand 130 states and 277 transitions. Second operand 17 states. [2020-04-18 11:49:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:41,058 INFO L93 Difference]: Finished difference Result 146 states and 302 transitions. [2020-04-18 11:49:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 302 transitions. [2020-04-18 11:49:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:41,058 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:49:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:41,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 74 times [2020-04-18 11:49:41,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:41,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132350792] [2020-04-18 11:49:41,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:41,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132350792] [2020-04-18 11:49:41,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191528281] [2020-04-18 11:49:41,148 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:41,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:41,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:41,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:41,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:41,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:41,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:41,852 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:41,852 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:41,855 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:49:41,855 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:42,061 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:49:42,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=847, Unknown=1, NotChecked=0, Total=1260 [2020-04-18 11:49:42,062 INFO L87 Difference]: Start difference. First operand 146 states and 302 transitions. Second operand 17 states. [2020-04-18 11:49:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:42,767 INFO L93 Difference]: Finished difference Result 156 states and 315 transitions. [2020-04-18 11:49:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 315 transitions. [2020-04-18 11:49:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:42,768 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:49:42,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:42,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 75 times [2020-04-18 11:49:42,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:42,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858706259] [2020-04-18 11:49:42,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:42,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858706259] [2020-04-18 11:49:42,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975624938] [2020-04-18 11:49:42,936 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:42,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:42,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:42,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:42,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:43,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:43,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:43,201 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:43,203 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:43,207 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:43,207 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:45,056 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:45,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:45,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=1499, Unknown=2, NotChecked=0, Total=2162 [2020-04-18 11:49:45,057 INFO L87 Difference]: Start difference. First operand 156 states and 315 transitions. Second operand 17 states. [2020-04-18 11:49:46,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:46,700 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2020-04-18 11:49:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 330 transitions. [2020-04-18 11:49:46,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:46,701 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:49:46,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 76 times [2020-04-18 11:49:46,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:46,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973581372] [2020-04-18 11:49:46,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:46,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973581372] [2020-04-18 11:49:46,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421585063] [2020-04-18 11:49:46,798 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:46,838 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:46,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:46,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:46,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:46,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:46,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:46,948 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:46,949 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:46,951 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 11:49:46,951 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:47,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:47,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:47,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:47,323 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:47,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1119, Invalid=3037, Unknown=4, NotChecked=0, Total=4160 [2020-04-18 11:49:47,324 INFO L87 Difference]: Start difference. First operand 169 states and 330 transitions. Second operand 19 states. [2020-04-18 11:49:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:48,192 INFO L93 Difference]: Finished difference Result 207 states and 383 transitions. [2020-04-18 11:49:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 383 transitions. [2020-04-18 11:49:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:48,194 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:49:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:48,195 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 77 times [2020-04-18 11:49:48,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:48,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532058963] [2020-04-18 11:49:48,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:48,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532058963] [2020-04-18 11:49:48,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672339623] [2020-04-18 11:49:48,313 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:48,356 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:49:48,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:48,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:48,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:48,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:48,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:48,480 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:48,480 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:48,482 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 11:49:48,482 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:48,544 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 14 times. [2020-04-18 11:49:48,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:48,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1438, Invalid=3960, Unknown=4, NotChecked=0, Total=5402 [2020-04-18 11:49:48,545 INFO L87 Difference]: Start difference. First operand 207 states and 383 transitions. Second operand 17 states. [2020-04-18 11:49:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:48,959 INFO L93 Difference]: Finished difference Result 238 states and 445 transitions. [2020-04-18 11:49:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 445 transitions. [2020-04-18 11:49:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:48,959 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:49:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 78 times [2020-04-18 11:49:48,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:48,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687303674] [2020-04-18 11:49:48,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:49,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687303674] [2020-04-18 11:49:49,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300805178] [2020-04-18 11:49:49,078 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:49,120 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:49,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:49,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:49,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:49,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:49,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:49,627 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:49,628 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:49,630 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:49:49,631 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:50,099 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:49:50,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:50,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1438, Invalid=3960, Unknown=4, NotChecked=0, Total=5402 [2020-04-18 11:49:50,100 INFO L87 Difference]: Start difference. First operand 238 states and 445 transitions. Second operand 17 states. [2020-04-18 11:49:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:50,608 INFO L93 Difference]: Finished difference Result 250 states and 462 transitions. [2020-04-18 11:49:50,609 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 462 transitions. [2020-04-18 11:49:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:50,609 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:49:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 79 times [2020-04-18 11:49:50,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:50,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612206352] [2020-04-18 11:49:50,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:50,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612206352] [2020-04-18 11:49:50,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776841926] [2020-04-18 11:49:50,708 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:50,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:50,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:52,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:52,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:49:52,890 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:52,891 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:52,892 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 11:49:52,892 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:54,708 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1438, Invalid=3960, Unknown=4, NotChecked=0, Total=5402 [2020-04-18 11:49:54,709 INFO L87 Difference]: Start difference. First operand 250 states and 462 transitions. Second operand 17 states. [2020-04-18 11:49:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:55,381 INFO L93 Difference]: Finished difference Result 257 states and 469 transitions. [2020-04-18 11:49:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 469 transitions. [2020-04-18 11:49:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:55,382 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:49:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:55,382 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 80 times [2020-04-18 11:49:55,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:55,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256319498] [2020-04-18 11:49:55,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:55,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256319498] [2020-04-18 11:49:55,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919149447] [2020-04-18 11:49:55,496 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:55,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:55,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:55,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:55,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:55,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:55,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:55,663 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:55,664 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:55,666 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 11:49:55,666 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:55,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:55,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:55,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:55,736 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:55,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:55,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1513, Invalid=4335, Unknown=4, NotChecked=0, Total=5852 [2020-04-18 11:49:55,738 INFO L87 Difference]: Start difference. First operand 257 states and 469 transitions. Second operand 19 states. [2020-04-18 11:49:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:56,811 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2020-04-18 11:49:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 527 transitions. [2020-04-18 11:49:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:56,812 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:49:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:56,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 81 times [2020-04-18 11:49:56,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:56,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618623912] [2020-04-18 11:49:56,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:56,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618623912] [2020-04-18 11:49:56,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200872003] [2020-04-18 11:49:56,917 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:56,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:56,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:56,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:56,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:57,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:57,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:57,104 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:57,105 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:57,107 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2020-04-18 11:49:57,107 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:57,174 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 18 times. [2020-04-18 11:49:57,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1699, Invalid=5269, Unknown=4, NotChecked=0, Total=6972 [2020-04-18 11:49:57,176 INFO L87 Difference]: Start difference. First operand 293 states and 527 transitions. Second operand 17 states. [2020-04-18 11:49:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:57,622 INFO L93 Difference]: Finished difference Result 307 states and 552 transitions. [2020-04-18 11:49:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 552 transitions. [2020-04-18 11:49:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:57,623 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:49:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 82 times [2020-04-18 11:49:57,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:57,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567492579] [2020-04-18 11:49:57,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:57,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567492579] [2020-04-18 11:49:57,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188530173] [2020-04-18 11:49:57,743 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:57,783 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:57,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:57,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:57,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:58,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:58,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:58,281 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:58,281 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:58,283 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:49:58,284 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:58,748 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:49:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:58,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1699, Invalid=5269, Unknown=4, NotChecked=0, Total=6972 [2020-04-18 11:49:58,749 INFO L87 Difference]: Start difference. First operand 307 states and 552 transitions. Second operand 17 states. [2020-04-18 11:49:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:59,295 INFO L93 Difference]: Finished difference Result 315 states and 561 transitions. [2020-04-18 11:49:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 561 transitions. [2020-04-18 11:49:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:59,296 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:49:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:59,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 83 times [2020-04-18 11:49:59,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:59,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530714975] [2020-04-18 11:49:59,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:59,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530714975] [2020-04-18 11:49:59,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351142339] [2020-04-18 11:49:59,375 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:59,417 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:49:59,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:59,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:59,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:00,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:00,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:00,595 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:00,596 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:00,598 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:50:00,598 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:00,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:00,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:00,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:00,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:00,785 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:50:00,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:00,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5541, Unknown=4, NotChecked=0, Total=7310 [2020-04-18 11:50:00,786 INFO L87 Difference]: Start difference. First operand 315 states and 561 transitions. Second operand 19 states. [2020-04-18 11:50:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:01,944 INFO L93 Difference]: Finished difference Result 342 states and 599 transitions. [2020-04-18 11:50:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 599 transitions. [2020-04-18 11:50:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:01,945 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:50:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:01,945 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 84 times [2020-04-18 11:50:01,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:01,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314836456] [2020-04-18 11:50:01,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:02,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314836456] [2020-04-18 11:50:02,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522461215] [2020-04-18 11:50:02,052 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:02,121 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:02,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:02,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:02,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:02,239 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 11:50:02,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:02,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:02,240 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:02,240 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:02,243 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 11:50:02,243 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:02,319 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 11:50:02,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:02,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1946, Invalid=6422, Unknown=4, NotChecked=0, Total=8372 [2020-04-18 11:50:02,320 INFO L87 Difference]: Start difference. First operand 342 states and 599 transitions. Second operand 17 states. [2020-04-18 11:50:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:02,806 INFO L93 Difference]: Finished difference Result 351 states and 613 transitions. [2020-04-18 11:50:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 613 transitions. [2020-04-18 11:50:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:02,807 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:50:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:02,807 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 85 times [2020-04-18 11:50:02,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:02,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146223078] [2020-04-18 11:50:02,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:02,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146223078] [2020-04-18 11:50:02,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294652679] [2020-04-18 11:50:02,895 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:02,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:02,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:03,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:03,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:03,444 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:03,445 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:03,448 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 11:50:03,448 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:03,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:03,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:04,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:04,557 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 11:50:04,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:04,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2027, Invalid=6711, Unknown=4, NotChecked=0, Total=8742 [2020-04-18 11:50:04,558 INFO L87 Difference]: Start difference. First operand 351 states and 613 transitions. Second operand 19 states. [2020-04-18 11:50:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:05,398 INFO L93 Difference]: Finished difference Result 375 states and 642 transitions. [2020-04-18 11:50:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 642 transitions. [2020-04-18 11:50:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:05,399 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:50:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 86 times [2020-04-18 11:50:05,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:05,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521846962] [2020-04-18 11:50:05,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:05,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521846962] [2020-04-18 11:50:05,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998981782] [2020-04-18 11:50:05,496 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:05,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:05,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:05,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:05,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:05,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:05,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:05,658 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:05,658 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:05,661 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 50 transitions. [2020-04-18 11:50:05,661 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:05,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:05,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:05,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:05,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:05,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:05,849 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 29 times. [2020-04-18 11:50:05,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:50:05,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2342, Invalid=7956, Unknown=4, NotChecked=0, Total=10302 [2020-04-18 11:50:05,851 INFO L87 Difference]: Start difference. First operand 375 states and 642 transitions. Second operand 20 states. [2020-04-18 11:50:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:06,567 INFO L93 Difference]: Finished difference Result 423 states and 717 transitions. [2020-04-18 11:50:06,567 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 717 transitions. [2020-04-18 11:50:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:06,568 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 11:50:06,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:06,568 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 87 times [2020-04-18 11:50:06,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:06,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244588978] [2020-04-18 11:50:06,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:06,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244588978] [2020-04-18 11:50:06,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966629782] [2020-04-18 11:50:06,640 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:06,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:50:06,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:06,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:06,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:07,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:07,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:07,676 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:07,677 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:07,679 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 40 transitions. [2020-04-18 11:50:07,679 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:07,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:09,781 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 11:50:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:50:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2657, Invalid=8895, Unknown=4, NotChecked=0, Total=11556 [2020-04-18 11:50:09,782 INFO L87 Difference]: Start difference. First operand 423 states and 717 transitions. Second operand 18 states. [2020-04-18 11:50:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:12,297 INFO L93 Difference]: Finished difference Result 453 states and 767 transitions. [2020-04-18 11:50:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 767 transitions. [2020-04-18 11:50:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:12,298 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 11:50:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 88 times [2020-04-18 11:50:12,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:12,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458269406] [2020-04-18 11:50:12,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:12,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458269406] [2020-04-18 11:50:12,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175180054] [2020-04-18 11:50:12,370 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:12,410 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:12,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:12,411 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:12,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:12,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:12,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:12,586 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:12,587 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:12,589 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:50:12,589 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:12,893 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:50:12,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:12,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3123, Invalid=10442, Unknown=7, NotChecked=0, Total=13572 [2020-04-18 11:50:12,894 INFO L87 Difference]: Start difference. First operand 453 states and 767 transitions. Second operand 17 states. [2020-04-18 11:50:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:14,311 INFO L93 Difference]: Finished difference Result 475 states and 794 transitions. [2020-04-18 11:50:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 794 transitions. [2020-04-18 11:50:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:14,312 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 11:50:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 89 times [2020-04-18 11:50:14,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:14,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116271846] [2020-04-18 11:50:14,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:14,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116271846] [2020-04-18 11:50:14,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923122962] [2020-04-18 11:50:14,395 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:14,440 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:50:14,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:14,441 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:14,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:14,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:14,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:14,624 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:14,624 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:14,626 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 11:50:14,626 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:14,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:14,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:15,135 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 11:50:15,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:50:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=12468, Unknown=7, NotChecked=0, Total=16256 [2020-04-18 11:50:15,136 INFO L87 Difference]: Start difference. First operand 475 states and 794 transitions. Second operand 18 states. [2020-04-18 11:50:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:17,348 INFO L93 Difference]: Finished difference Result 495 states and 823 transitions. [2020-04-18 11:50:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 823 transitions. [2020-04-18 11:50:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:17,349 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 11:50:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 90 times [2020-04-18 11:50:17,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:17,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883388429] [2020-04-18 11:50:17,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:17,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883388429] [2020-04-18 11:50:17,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621345053] [2020-04-18 11:50:17,433 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:17,475 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:17,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:17,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:17,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:17,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:17,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:17,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:17,648 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:17,649 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:17,651 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:50:17,651 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:18,166 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:50:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:18,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=15572, Unknown=7, NotChecked=0, Total=20306 [2020-04-18 11:50:18,167 INFO L87 Difference]: Start difference. First operand 495 states and 823 transitions. Second operand 17 states. [2020-04-18 11:50:21,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:21,427 INFO L93 Difference]: Finished difference Result 540 states and 879 transitions. [2020-04-18 11:50:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 879 transitions. [2020-04-18 11:50:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:21,428 INFO L105 Mcr]: ---- MCR iteration 19 ---- [2020-04-18 11:50:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 91 times [2020-04-18 11:50:21,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:21,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985217668] [2020-04-18 11:50:21,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:21,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985217668] [2020-04-18 11:50:21,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409960168] [2020-04-18 11:50:21,510 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:21,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:21,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:21,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:21,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:21,700 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:21,700 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:21,702 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:50:21,702 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:22,323 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:50:22,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5692, Invalid=19423, Unknown=7, NotChecked=0, Total=25122 [2020-04-18 11:50:22,324 INFO L87 Difference]: Start difference. First operand 540 states and 879 transitions. Second operand 17 states. [2020-04-18 11:50:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:24,359 INFO L93 Difference]: Finished difference Result 554 states and 889 transitions. [2020-04-18 11:50:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 889 transitions. [2020-04-18 11:50:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:24,360 INFO L105 Mcr]: ---- MCR iteration 20 ---- [2020-04-18 11:50:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:24,360 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 92 times [2020-04-18 11:50:24,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:24,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099190525] [2020-04-18 11:50:24,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:24,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099190525] [2020-04-18 11:50:24,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962394353] [2020-04-18 11:50:24,434 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:24,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:24,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:24,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:24,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:24,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:24,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:24,620 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:24,621 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:24,622 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:50:24,622 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:24,838 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:50:24,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:24,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6685, Invalid=22720, Unknown=7, NotChecked=0, Total=29412 [2020-04-18 11:50:24,840 INFO L87 Difference]: Start difference. First operand 554 states and 889 transitions. Second operand 17 states. [2020-04-18 11:50:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:26,719 INFO L93 Difference]: Finished difference Result 573 states and 908 transitions. [2020-04-18 11:50:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 908 transitions. [2020-04-18 11:50:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:26,720 INFO L105 Mcr]: ---- MCR iteration 21 ---- [2020-04-18 11:50:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 93 times [2020-04-18 11:50:26,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:26,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686216786] [2020-04-18 11:50:26,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:26,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686216786] [2020-04-18 11:50:26,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256220050] [2020-04-18 11:50:26,795 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:26,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:50:26,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:26,837 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-18 11:50:26,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:26,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:26,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-04-18 11:50:26,923 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:26,924 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:26,926 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 11:50:26,926 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:27,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:27,312 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:50:27,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7999, Invalid=28284, Unknown=7, NotChecked=0, Total=36290 [2020-04-18 11:50:27,314 INFO L87 Difference]: Start difference. First operand 573 states and 908 transitions. Second operand 17 states. [2020-04-18 11:50:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:28,671 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-04-18 11:50:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 935 transitions. [2020-04-18 11:50:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:28,673 INFO L105 Mcr]: ---- MCR iteration 22 ---- [2020-04-18 11:50:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 94 times [2020-04-18 11:50:28,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:28,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996719710] [2020-04-18 11:50:28,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:28,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996719710] [2020-04-18 11:50:28,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166241356] [2020-04-18 11:50:28,756 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:28,801 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:28,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:28,802 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:28,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:30,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:30,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:30,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:30,255 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:30,256 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:30,258 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:50:30,258 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:34,320 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:50:34,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:34,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9902, Invalid=33978, Unknown=10, NotChecked=0, Total=43890 [2020-04-18 11:50:34,322 INFO L87 Difference]: Start difference. First operand 605 states and 935 transitions. Second operand 17 states. [2020-04-18 11:50:41,129 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-04-18 11:50:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:46,572 INFO L93 Difference]: Finished difference Result 619 states and 947 transitions. [2020-04-18 11:50:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 947 transitions. [2020-04-18 11:50:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:46,574 INFO L105 Mcr]: ---- MCR iteration 23 ---- [2020-04-18 11:50:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:46,574 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 95 times [2020-04-18 11:50:46,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:46,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367666500] [2020-04-18 11:50:46,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:46,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367666500] [2020-04-18 11:50:46,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449145638] [2020-04-18 11:50:46,663 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:46,704 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:50:46,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:46,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:46,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:46,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:46,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:46,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:46,814 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:46,816 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:46,818 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:50:46,818 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:47,391 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:50:47,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11885, Invalid=41688, Unknown=19, NotChecked=0, Total=53592 [2020-04-18 11:50:47,393 INFO L87 Difference]: Start difference. First operand 619 states and 947 transitions. Second operand 17 states. [2020-04-18 11:50:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:51,433 INFO L93 Difference]: Finished difference Result 644 states and 968 transitions. [2020-04-18 11:50:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 968 transitions. [2020-04-18 11:50:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:51,434 INFO L105 Mcr]: ---- MCR iteration 24 ---- [2020-04-18 11:50:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:51,435 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 96 times [2020-04-18 11:50:51,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:51,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990459228] [2020-04-18 11:50:51,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:51,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990459228] [2020-04-18 11:50:51,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207692207] [2020-04-18 11:50:51,513 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:51,560 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 11:50:51,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:51,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:51,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:51,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:51,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:51,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:51,692 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:51,693 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:51,695 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:50:51,695 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:51,799 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:50:51,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:51,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14418, Invalid=51867, Unknown=21, NotChecked=0, Total=66306 [2020-04-18 11:50:51,801 INFO L87 Difference]: Start difference. First operand 644 states and 968 transitions. Second operand 17 states. [2020-04-18 11:50:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:52,333 INFO L93 Difference]: Finished difference Result 658 states and 979 transitions. [2020-04-18 11:50:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 979 transitions. [2020-04-18 11:50:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:52,335 INFO L105 Mcr]: ---- MCR iteration 25 ---- [2020-04-18 11:50:52,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:52,335 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 97 times [2020-04-18 11:50:52,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:52,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845529425] [2020-04-18 11:50:52,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:52,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845529425] [2020-04-18 11:50:52,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392838352] [2020-04-18 11:50:52,454 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:52,500 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:52,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:52,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:52,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:52,611 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:52,612 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:52,613 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:50:52,614 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:52,796 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:50:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:52,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14743, Invalid=53618, Unknown=21, NotChecked=0, Total=68382 [2020-04-18 11:50:52,799 INFO L87 Difference]: Start difference. First operand 658 states and 979 transitions. Second operand 17 states. [2020-04-18 11:50:54,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:54,393 INFO L93 Difference]: Finished difference Result 667 states and 985 transitions. [2020-04-18 11:50:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 985 transitions. [2020-04-18 11:50:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:54,394 INFO L105 Mcr]: ---- MCR iteration 26 ---- [2020-04-18 11:50:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:54,395 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 98 times [2020-04-18 11:50:54,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:54,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535156770] [2020-04-18 11:50:54,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:54,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535156770] [2020-04-18 11:50:54,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763692283] [2020-04-18 11:50:54,511 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:54,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:54,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:54,574 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:54,575 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:54,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:54,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:54,733 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:54,734 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:54,736 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:50:54,736 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:55,023 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:50:55,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:55,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15761, Invalid=57930, Unknown=21, NotChecked=0, Total=73712 [2020-04-18 11:50:55,026 INFO L87 Difference]: Start difference. First operand 667 states and 985 transitions. Second operand 17 states. [2020-04-18 11:50:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:56,855 INFO L93 Difference]: Finished difference Result 675 states and 991 transitions. [2020-04-18 11:50:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 991 transitions. [2020-04-18 11:50:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:56,856 INFO L105 Mcr]: ---- MCR iteration 27 ---- [2020-04-18 11:50:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 99 times [2020-04-18 11:50:56,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:56,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269070112] [2020-04-18 11:50:56,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:56,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269070112] [2020-04-18 11:50:56,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311472700] [2020-04-18 11:50:56,928 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:56,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 11:50:56,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:56,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-18 11:50:56,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:57,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:57,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-04-18 11:50:57,066 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:57,068 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:57,069 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 24 transitions. [2020-04-18 11:50:57,070 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:57,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:57,653 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:50:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17520, Invalid=66269, Unknown=21, NotChecked=0, Total=83810 [2020-04-18 11:50:57,656 INFO L87 Difference]: Start difference. First operand 675 states and 991 transitions. Second operand 17 states. [2020-04-18 11:50:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:59,854 INFO L93 Difference]: Finished difference Result 703 states and 1009 transitions. [2020-04-18 11:50:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1009 transitions. [2020-04-18 11:50:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:59,855 INFO L105 Mcr]: ---- MCR iteration 28 ---- [2020-04-18 11:50:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 100 times [2020-04-18 11:50:59,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:59,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176959848] [2020-04-18 11:50:59,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:59,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176959848] [2020-04-18 11:50:59,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052814995] [2020-04-18 11:50:59,932 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:59,975 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:59,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:59,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:59,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:00,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:00,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:00,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:00,091 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:00,092 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:00,094 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:51:00,094 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:05,246 WARN L192 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-04-18 11:51:05,247 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:51:05,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20159, Invalid=75604, Unknown=27, NotChecked=0, Total=95790 [2020-04-18 11:51:05,251 INFO L87 Difference]: Start difference. First operand 703 states and 1009 transitions. Second operand 17 states. [2020-04-18 11:51:10,271 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2020-04-18 11:51:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:14,167 INFO L93 Difference]: Finished difference Result 712 states and 1013 transitions. [2020-04-18 11:51:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1013 transitions. [2020-04-18 11:51:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:14,168 INFO L105 Mcr]: ---- MCR iteration 29 ---- [2020-04-18 11:51:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:14,168 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 101 times [2020-04-18 11:51:14,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:14,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387677130] [2020-04-18 11:51:14,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:14,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387677130] [2020-04-18 11:51:14,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235412408] [2020-04-18 11:51:14,283 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:14,349 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:51:14,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:14,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:14,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:14,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:14,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:14,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:14,593 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:14,594 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:14,596 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:51:14,596 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:19,028 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:51:19,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23056, Invalid=88126, Unknown=40, NotChecked=0, Total=111222 [2020-04-18 11:51:19,032 INFO L87 Difference]: Start difference. First operand 712 states and 1013 transitions. Second operand 17 states. [2020-04-18 11:51:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:37,861 INFO L93 Difference]: Finished difference Result 728 states and 1027 transitions. [2020-04-18 11:51:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1027 transitions. [2020-04-18 11:51:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:37,862 INFO L105 Mcr]: ---- MCR iteration 30 ---- [2020-04-18 11:51:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 102 times [2020-04-18 11:51:37,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:37,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886801051] [2020-04-18 11:51:37,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:37,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886801051] [2020-04-18 11:51:37,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191501993] [2020-04-18 11:51:37,937 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:38,001 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:51:38,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:38,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:38,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:38,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:38,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:38,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:38,098 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:38,098 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:38,100 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 11:51:38,100 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:40,166 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:51:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:40,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26391, Invalid=103514, Unknown=55, NotChecked=0, Total=129960 [2020-04-18 11:51:40,171 INFO L87 Difference]: Start difference. First operand 728 states and 1027 transitions. Second operand 17 states. [2020-04-18 11:51:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:55,083 INFO L93 Difference]: Finished difference Result 746 states and 1046 transitions. [2020-04-18 11:51:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1046 transitions. [2020-04-18 11:51:55,084 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:51:55,086 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1424433283] [2020-04-18 11:51:55,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:51:55,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 11:51:55,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1424433283] [2020-04-18 11:51:55,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2020-04-18 11:51:55,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:51:55,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2020-04-18 11:51:55,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28723, Invalid=114474, Unknown=65, NotChecked=0, Total=143262 [2020-04-18 11:51:55,092 INFO L87 Difference]: Start difference. First operand 191 states and 514 transitions. Second operand 160 states. [2020-04-18 11:51:58,608 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-04-18 11:52:01,963 WARN L192 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-04-18 11:52:03,487 WARN L192 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 16 Received shutdown request... [2020-04-18 11:52:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. Cannot interrupt operation gracefully because timeout expired. Forcing shutdown