/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 07:31:42,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 07:31:42,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 07:31:42,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 07:31:42,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 07:31:42,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 07:31:42,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 07:31:42,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 07:31:42,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 07:31:42,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 07:31:42,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 07:31:42,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 07:31:42,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 07:31:42,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 07:31:42,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 07:31:42,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 07:31:42,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 07:31:42,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 07:31:42,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 07:31:43,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 07:31:43,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 07:31:43,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 07:31:43,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 07:31:43,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 07:31:43,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 07:31:43,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 07:31:43,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 07:31:43,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 07:31:43,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 07:31:43,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 07:31:43,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 07:31:43,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 07:31:43,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 07:31:43,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 07:31:43,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 07:31:43,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 07:31:43,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 07:31:43,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 07:31:43,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 07:31:43,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 07:31:43,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 07:31:43,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf [2020-04-18 07:31:43,068 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 07:31:43,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 07:31:43,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 07:31:43,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 07:31:43,073 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 07:31:43,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 07:31:43,073 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 07:31:43,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 07:31:43,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 07:31:43,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 07:31:43,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 07:31:43,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 07:31:43,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 07:31:43,075 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 07:31:43,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 07:31:43,076 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 07:31:43,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 07:31:43,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 07:31:43,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 07:31:43,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 07:31:43,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 07:31:43,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:31:43,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 07:31:43,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 07:31:43,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 07:31:43,078 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 07:31:43,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 07:31:43,079 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 07:31:43,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 07:31:43,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 07:31:43,427 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 07:31:43,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 07:31:43,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 07:31:43,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 07:31:43,449 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 07:31:43,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-04-18 07:31:43,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8c619cc8/733e8ef24b0a4416b3e9dcd28e732816/FLAG589468eef [2020-04-18 07:31:44,064 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 07:31:44,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-04-18 07:31:44,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8c619cc8/733e8ef24b0a4416b3e9dcd28e732816/FLAG589468eef [2020-04-18 07:31:44,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8c619cc8/733e8ef24b0a4416b3e9dcd28e732816 [2020-04-18 07:31:44,386 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 07:31:44,410 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 07:31:44,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:44,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 07:31:44,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 07:31:44,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1240160e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44, skipping insertion in model container [2020-04-18 07:31:44,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 07:31:44,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 07:31:44,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:45,000 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 07:31:45,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:45,169 INFO L208 MainTranslator]: Completed translation [2020-04-18 07:31:45,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45 WrapperNode [2020-04-18 07:31:45,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:45,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:45,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 07:31:45,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 07:31:45,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:45,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 07:31:45,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 07:31:45,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 07:31:45,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 07:31:45,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 07:31:45,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:31:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 07:31:45,342 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 07:31:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 07:31:45,343 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 07:31:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 07:31:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 07:31:45,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 07:31:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 07:31:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 07:31:45,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 07:31:45,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 07:31:45,346 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 07:31:45,694 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 07:31:45,694 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 07:31:45,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:45 BoogieIcfgContainer [2020-04-18 07:31:45,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 07:31:45,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 07:31:45,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 07:31:45,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 07:31:45,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 07:31:44" (1/3) ... [2020-04-18 07:31:45,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1fe617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:45, skipping insertion in model container [2020-04-18 07:31:45,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (2/3) ... [2020-04-18 07:31:45,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1fe617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:45, skipping insertion in model container [2020-04-18 07:31:45,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:45" (3/3) ... [2020-04-18 07:31:45,709 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-04-18 07:31:45,718 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 07:31:45,719 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 07:31:45,725 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 07:31:45,726 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 07:31:45,753 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,754 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,754 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,754 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,755 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,755 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,755 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,756 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,756 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,756 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,756 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,757 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,757 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,757 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,757 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,758 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,758 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,758 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,759 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,759 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,759 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,759 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,760 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,760 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,760 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,760 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,760 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,761 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,761 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,761 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,765 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,765 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,766 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,766 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,766 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,766 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,772 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,773 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,774 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,774 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,775 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,775 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,790 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 07:31:45,808 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 07:31:45,809 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 07:31:45,809 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 07:31:45,809 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 07:31:45,809 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 07:31:45,809 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 07:31:45,809 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 07:31:45,810 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 07:31:45,826 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,828 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,870 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 07:31:45,870 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:31:45,879 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 07:31:45,882 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,899 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 07:31:45,900 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:31:45,901 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 07:31:45,903 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-18 07:31:45,904 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-18 07:31:47,126 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-18 07:31:47,239 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-18 07:31:47,239 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-18 07:31:47,243 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-18 07:31:47,256 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 07:31:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:31:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:31:47,266 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:47,267 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 07:31:47,267 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-18 07:31:47,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:47,279 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [618260532] [2020-04-18 07:31:47,295 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,308 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:31:47,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 07:31:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:31:47,311 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 2 times [2020-04-18 07:31:47,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712631688] [2020-04-18 07:31:47,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:47,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712631688] [2020-04-18 07:31:47,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:47,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:47,597 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:47,598 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,600 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:31:47,600 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:47,623 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:47,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:31:47,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 07:31:47,630 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 07:31:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,654 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 07:31:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 07:31:47,655 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:47,655 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [618260532] [2020-04-18 07:31:47,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:47,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 07:31:47,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [618260532] [2020-04-18 07:31:47,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 07:31:47,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:47,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:31:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,664 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 07:31:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,714 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-18 07:31:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 07:31:47,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 07:31:47,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:47,736 INFO L225 Difference]: With dead ends: 83 [2020-04-18 07:31:47,736 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 07:31:47,738 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 07:31:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-18 07:31:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 07:31:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-18 07:31:47,783 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-18 07:31:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:47,784 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-18 07:31:47,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 07:31:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-18 07:31:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,785 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:47,785 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:47,786 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,786 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-18 07:31:47,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:47,787 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1324449331] [2020-04-18 07:31:47,787 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,789 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 07:31:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 07:31:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,790 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash 235305767, now seen corresponding path program 2 times [2020-04-18 07:31:47,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475191207] [2020-04-18 07:31:47,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:47,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475191207] [2020-04-18 07:31:47,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:47,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:47,898 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:47,899 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,902 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 18 transitions. [2020-04-18 07:31:47,902 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:47,932 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:31:47,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,933 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 07:31:47,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,967 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 07:31:47,967 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 07:31:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,968 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,968 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 3 times [2020-04-18 07:31:47,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072269959] [2020-04-18 07:31:47,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072269959] [2020-04-18 07:31:48,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:31:48,097 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,097 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,099 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:31:48,099 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,114 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:48,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:31:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,115 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 5 states. [2020-04-18 07:31:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,145 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 07:31:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 07:31:48,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:48,146 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1324449331] [2020-04-18 07:31:48,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:48,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:31:48,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1324449331] [2020-04-18 07:31:48,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 07:31:48,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:48,149 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 6 states. [2020-04-18 07:31:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,292 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-18 07:31:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 07:31:48,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 07:31:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:48,295 INFO L225 Difference]: With dead ends: 80 [2020-04-18 07:31:48,295 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 07:31:48,296 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 07:31:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-18 07:31:48,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 07:31:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-18 07:31:48,307 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-18 07:31:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:48,308 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-18 07:31:48,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 07:31:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-18 07:31:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:48,310 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:48,310 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:48,310 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,311 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-18 07:31:48,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:48,311 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1224610664] [2020-04-18 07:31:48,312 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,312 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:31:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-04-18 07:31:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:48,313 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:48,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 2 times [2020-04-18 07:31:48,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620493794] [2020-04-18 07:31:48,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620493794] [2020-04-18 07:31:48,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:31:48,375 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,376 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,377 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-04-18 07:31:48,377 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,413 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:48,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:48,414 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2020-04-18 07:31:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,441 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-04-18 07:31:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-04-18 07:31:48,442 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:48,442 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1224610664] [2020-04-18 07:31:48,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:48,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:31:48,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1224610664] [2020-04-18 07:31:48,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 07:31:48,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:48,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,444 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 6 states. [2020-04-18 07:31:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,490 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-04-18 07:31:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 07:31:48,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 07:31:48,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:48,492 INFO L225 Difference]: With dead ends: 83 [2020-04-18 07:31:48,492 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 07:31:48,492 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 07:31:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-04-18 07:31:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 07:31:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-18 07:31:48,502 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-18 07:31:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:48,502 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-18 07:31:48,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 07:31:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-18 07:31:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,503 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:48,503 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:48,504 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 4 times [2020-04-18 07:31:48,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:48,505 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [929707318] [2020-04-18 07:31:48,505 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,506 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 07:31:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 07:31:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,507 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1295455160, now seen corresponding path program 5 times [2020-04-18 07:31:48,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321279833] [2020-04-18 07:31:48,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:48,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321279833] [2020-04-18 07:31:48,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:48,584 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,585 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,586 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:48,586 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,622 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 07:31:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:48,623 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-04-18 07:31:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,682 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2020-04-18 07:31:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2020-04-18 07:31:48,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,684 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1294792070, now seen corresponding path program 6 times [2020-04-18 07:31:48,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20358586] [2020-04-18 07:31:48,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20358586] [2020-04-18 07:31:48,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485078455] [2020-04-18 07:31:48,743 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:48,830 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:48,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:48,832 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 07:31:48,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:48,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:48,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-04-18 07:31:48,903 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,904 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,906 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2020-04-18 07:31:48,906 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,955 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:48,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:31:48,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:48,955 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2020-04-18 07:31:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,020 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 07:31:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 07:31:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:49,021 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 7 times [2020-04-18 07:31:49,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:49,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307982380] [2020-04-18 07:31:49,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307982380] [2020-04-18 07:31:49,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233178950] [2020-04-18 07:31:49,144 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:49,216 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:31:49,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:49,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:49,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-18 07:31:49,293 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:49,294 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,296 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:49,296 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:49,327 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:49,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:31:49,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:31:49,328 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 10 states. [2020-04-18 07:31:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,385 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 07:31:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 07:31:49,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:49,386 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [929707318] [2020-04-18 07:31:49,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:49,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:49,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [929707318] [2020-04-18 07:31:49,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:31:49,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:49,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:49,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:31:49,387 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 12 states. [2020-04-18 07:31:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,594 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-18 07:31:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:31:49,596 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 07:31:49,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:49,597 INFO L225 Difference]: With dead ends: 101 [2020-04-18 07:31:49,598 INFO L226 Difference]: Without dead ends: 96 [2020-04-18 07:31:49,598 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:31:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-18 07:31:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-18 07:31:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 07:31:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-18 07:31:49,607 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-18 07:31:49,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:49,607 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-18 07:31:49,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:31:49,608 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-18 07:31:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:49,609 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:49,609 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:50,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:50,022 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-18 07:31:50,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:50,023 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2083255815] [2020-04-18 07:31:50,024 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,024 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:50,024 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 07:31:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:50,025 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 4 times [2020-04-18 07:31:50,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057892538] [2020-04-18 07:31:50,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057892538] [2020-04-18 07:31:50,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723386555] [2020-04-18 07:31:50,119 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:50,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:50,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:50,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:31:50,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:50,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-18 07:31:50,269 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,270 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,271 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-04-18 07:31:50,271 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:50,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,467 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:50,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:31:50,468 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 12 states. [2020-04-18 07:31:50,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,542 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2020-04-18 07:31:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-04-18 07:31:50,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:50,543 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2083255815] [2020-04-18 07:31:50,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:50,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:50,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2083255815] [2020-04-18 07:31:50,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:31:50,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:50,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:50,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:50,545 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 12 states. [2020-04-18 07:31:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,595 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-04-18 07:31:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 07:31:50,595 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 07:31:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:50,597 INFO L225 Difference]: With dead ends: 104 [2020-04-18 07:31:50,597 INFO L226 Difference]: Without dead ends: 98 [2020-04-18 07:31:50,597 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-18 07:31:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-04-18 07:31:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 07:31:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-18 07:31:50,605 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 9 [2020-04-18 07:31:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:50,605 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-18 07:31:50,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:31:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-18 07:31:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,606 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:50,606 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:50,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:50,818 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-18 07:31:50,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:50,820 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [751102888] [2020-04-18 07:31:50,821 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,822 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 07:31:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 07:31:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,823 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 2 times [2020-04-18 07:31:50,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630273600] [2020-04-18 07:31:50,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630273600] [2020-04-18 07:31:50,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:50,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:50,904 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,905 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,907 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-04-18 07:31:50,908 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,939 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:50,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:50,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:50,940 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-04-18 07:31:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,995 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2020-04-18 07:31:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 79 transitions. [2020-04-18 07:31:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,996 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 3 times [2020-04-18 07:31:50,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661821601] [2020-04-18 07:31:50,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661821601] [2020-04-18 07:31:51,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:51,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:51,068 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,068 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,070 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:51,071 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,101 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:31:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:51,102 INFO L87 Difference]: Start difference. First operand 45 states and 79 transitions. Second operand 7 states. [2020-04-18 07:31:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,167 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2020-04-18 07:31:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 83 transitions. [2020-04-18 07:31:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,168 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-18 07:31:51,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:51,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406549758] [2020-04-18 07:31:51,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406549758] [2020-04-18 07:31:51,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:51,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:51,221 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,222 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,224 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 07:31:51,224 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,258 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 07:31:51,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:51,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:31:51,259 INFO L87 Difference]: Start difference. First operand 50 states and 83 transitions. Second operand 6 states. [2020-04-18 07:31:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,330 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2020-04-18 07:31:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2020-04-18 07:31:51,330 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:51,331 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [751102888] [2020-04-18 07:31:51,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:51,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:51,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [751102888] [2020-04-18 07:31:51,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 07:31:51,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:51,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:51,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:31:51,332 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 11 states. [2020-04-18 07:31:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,427 INFO L93 Difference]: Finished difference Result 124 states and 288 transitions. [2020-04-18 07:31:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 07:31:51,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-18 07:31:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:51,429 INFO L225 Difference]: With dead ends: 124 [2020-04-18 07:31:51,429 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 07:31:51,429 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:31:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 07:31:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-04-18 07:31:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-18 07:31:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 210 transitions. [2020-04-18 07:31:51,438 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 210 transitions. Word has length 10 [2020-04-18 07:31:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:51,438 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 210 transitions. [2020-04-18 07:31:51,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 07:31:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 210 transitions. [2020-04-18 07:31:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,439 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:51,439 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:51,440 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 5 times [2020-04-18 07:31:51,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:51,440 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1920690461] [2020-04-18 07:31:51,441 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,442 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 07:31:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,443 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-18 07:31:51,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:51,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063266187] [2020-04-18 07:31:51,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063266187] [2020-04-18 07:31:51,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592082153] [2020-04-18 07:31:51,537 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:51,600 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:51,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:51,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:51,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:51,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:51,707 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,708 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,710 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 07:31:51,710 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:51,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:51,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,975 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:31:51,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:51,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:31:51,976 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 16 states. [2020-04-18 07:31:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,104 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-04-18 07:31:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-04-18 07:31:52,104 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:52,105 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1920690461] [2020-04-18 07:31:52,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:52,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:52,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1920690461] [2020-04-18 07:31:52,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 07:31:52,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:52,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:52,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:52,107 INFO L87 Difference]: Start difference. First operand 87 states and 210 transitions. Second operand 16 states. [2020-04-18 07:31:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,190 INFO L93 Difference]: Finished difference Result 122 states and 292 transitions. [2020-04-18 07:31:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 07:31:52,191 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-04-18 07:31:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:52,192 INFO L225 Difference]: With dead ends: 122 [2020-04-18 07:31:52,192 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 07:31:52,192 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 07:31:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-04-18 07:31:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-18 07:31:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-04-18 07:31:52,210 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 10 [2020-04-18 07:31:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:52,211 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-04-18 07:31:52,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 07:31:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-04-18 07:31:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,212 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:52,212 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:52,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,416 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-18 07:31:52,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:52,418 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1616479725] [2020-04-18 07:31:52,418 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,420 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 91 transitions. [2020-04-18 07:31:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 07:31:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,421 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 6 times [2020-04-18 07:31:52,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:52,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109219945] [2020-04-18 07:31:52,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109219945] [2020-04-18 07:31:52,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001516361] [2020-04-18 07:31:52,511 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,563 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:52,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:52,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:52,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:52,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:52,676 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:52,677 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,679 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 28 transitions. [2020-04-18 07:31:52,679 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:52,777 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:52,781 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 11 states. [2020-04-18 07:31:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,892 INFO L93 Difference]: Finished difference Result 62 states and 117 transitions. [2020-04-18 07:31:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 117 transitions. [2020-04-18 07:31:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,893 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 7 times [2020-04-18 07:31:52,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:52,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079408418] [2020-04-18 07:31:52,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079408418] [2020-04-18 07:31:52,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834855518] [2020-04-18 07:31:52,971 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:53,105 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,106 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,108 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 07:31:53,108 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,145 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:31:53,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:53,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:53,146 INFO L87 Difference]: Start difference. First operand 62 states and 117 transitions. Second operand 11 states. [2020-04-18 07:31:53,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:53,288 INFO L93 Difference]: Finished difference Result 70 states and 127 transitions. [2020-04-18 07:31:53,288 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 127 transitions. [2020-04-18 07:31:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:53,289 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 8 times [2020-04-18 07:31:53,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714394588] [2020-04-18 07:31:53,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714394588] [2020-04-18 07:31:53,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728184365] [2020-04-18 07:31:53,356 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:53,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:53,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:53,481 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,482 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,483 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:31:53,484 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,554 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 15 times. [2020-04-18 07:31:53,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:53,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:31:53,555 INFO L87 Difference]: Start difference. First operand 70 states and 127 transitions. Second operand 12 states. [2020-04-18 07:31:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:53,753 INFO L93 Difference]: Finished difference Result 81 states and 141 transitions. [2020-04-18 07:31:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-04-18 07:31:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:53,754 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:31:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 9 times [2020-04-18 07:31:53,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335512509] [2020-04-18 07:31:53,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335512509] [2020-04-18 07:31:53,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32392787] [2020-04-18 07:31:53,829 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:31:53,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:53,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:53,977 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,978 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,981 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-04-18 07:31:53,982 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:54,096 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:31:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:31:54,097 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 11 states. [2020-04-18 07:31:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:54,415 INFO L93 Difference]: Finished difference Result 90 states and 146 transitions. [2020-04-18 07:31:54,415 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 146 transitions. [2020-04-18 07:31:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:54,415 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:31:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:54,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 10 times [2020-04-18 07:31:54,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:54,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902568729] [2020-04-18 07:31:54,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:54,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902568729] [2020-04-18 07:31:54,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523706742] [2020-04-18 07:31:54,486 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:54,553 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:54,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:54,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:54,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:54,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:54,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:54,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:54,629 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:54,659 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:54,661 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-04-18 07:31:54,661 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:54,822 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:54,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:54,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:31:54,823 INFO L87 Difference]: Start difference. First operand 90 states and 146 transitions. Second operand 11 states. [2020-04-18 07:31:55,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:55,072 INFO L93 Difference]: Finished difference Result 97 states and 149 transitions. [2020-04-18 07:31:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 149 transitions. [2020-04-18 07:31:55,073 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:55,074 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1616479725] [2020-04-18 07:31:55,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:55,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:55,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1616479725] [2020-04-18 07:31:55,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 07:31:55,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:55,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:31:55,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 07:31:55,076 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 28 states. [2020-04-18 07:31:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:55,532 INFO L93 Difference]: Finished difference Result 217 states and 499 transitions. [2020-04-18 07:31:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 07:31:55,534 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 11 [2020-04-18 07:31:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:55,536 INFO L225 Difference]: With dead ends: 217 [2020-04-18 07:31:55,536 INFO L226 Difference]: Without dead ends: 198 [2020-04-18 07:31:55,537 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 07:31:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-18 07:31:55,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 107. [2020-04-18 07:31:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-04-18 07:31:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 271 transitions. [2020-04-18 07:31:55,545 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 271 transitions. Word has length 11 [2020-04-18 07:31:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:55,545 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 271 transitions. [2020-04-18 07:31:55,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 07:31:55,546 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 271 transitions. [2020-04-18 07:31:55,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:55,546 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:55,546 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:56,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,552 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 11 times [2020-04-18 07:31:56,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:56,553 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2033265196] [2020-04-18 07:31:56,554 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,555 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 07:31:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:31:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:56,556 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 12 times [2020-04-18 07:31:56,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:56,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438650161] [2020-04-18 07:31:56,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438650161] [2020-04-18 07:31:56,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399037630] [2020-04-18 07:31:56,639 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,690 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:56,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:56,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:56,693 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:56,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:56,762 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:56,762 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,764 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:56,764 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:56,850 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:31:56,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:56,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:56,851 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2020-04-18 07:31:57,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:57,013 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2020-04-18 07:31:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 07:31:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:57,014 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 13 times [2020-04-18 07:31:57,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:57,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993990326] [2020-04-18 07:31:57,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993990326] [2020-04-18 07:31:57,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350663155] [2020-04-18 07:31:57,098 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:57,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:57,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:57,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:57,254 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:57,255 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:57,256 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 07:31:57,257 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:57,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:57,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,351 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:31:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:31:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:57,352 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 13 states. [2020-04-18 07:31:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:57,553 INFO L93 Difference]: Finished difference Result 71 states and 126 transitions. [2020-04-18 07:31:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2020-04-18 07:31:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:57,554 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:57,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 14 times [2020-04-18 07:31:57,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:57,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771561810] [2020-04-18 07:31:57,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771561810] [2020-04-18 07:31:57,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389555547] [2020-04-18 07:31:57,641 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:57,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:57,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:57,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:57,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:57,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:57,754 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:57,755 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:57,756 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:31:57,756 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:57,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:57,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,870 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:31:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:31:57,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:31:57,871 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 14 states. [2020-04-18 07:31:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:58,098 INFO L93 Difference]: Finished difference Result 79 states and 134 transitions. [2020-04-18 07:31:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 134 transitions. [2020-04-18 07:31:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:58,098 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:31:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:58,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 15 times [2020-04-18 07:31:58,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:58,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836378166] [2020-04-18 07:31:58,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:58,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836378166] [2020-04-18 07:31:58,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042963820] [2020-04-18 07:31:58,165 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:58,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:31:58,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:58,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:58,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:58,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:58,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:58,283 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:58,284 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:58,285 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:31:58,285 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:58,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:58,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:58,335 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:58,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:58,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:31:58,336 INFO L87 Difference]: Start difference. First operand 79 states and 134 transitions. Second operand 12 states. [2020-04-18 07:31:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:58,575 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2020-04-18 07:31:58,575 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2020-04-18 07:31:58,576 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:58,576 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2033265196] [2020-04-18 07:31:58,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:58,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:58,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2033265196] [2020-04-18 07:31:58,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 07:31:58,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:58,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 07:31:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:31:58,578 INFO L87 Difference]: Start difference. First operand 107 states and 271 transitions. Second operand 23 states. [2020-04-18 07:31:58,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:58,770 INFO L93 Difference]: Finished difference Result 153 states and 367 transitions. [2020-04-18 07:31:58,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:31:58,771 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 11 [2020-04-18 07:31:58,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:58,772 INFO L225 Difference]: With dead ends: 153 [2020-04-18 07:31:58,772 INFO L226 Difference]: Without dead ends: 148 [2020-04-18 07:31:58,773 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:31:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-18 07:31:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2020-04-18 07:31:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-18 07:31:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2020-04-18 07:31:58,778 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 11 [2020-04-18 07:31:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:58,778 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2020-04-18 07:31:58,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 07:31:58,779 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2020-04-18 07:31:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:58,779 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:58,779 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:59,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:59,585 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 7 times [2020-04-18 07:31:59,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:59,586 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1264970570] [2020-04-18 07:31:59,587 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:59,588 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 07:31:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 07:31:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:59,588 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:59,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 8 times [2020-04-18 07:31:59,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:59,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317814763] [2020-04-18 07:31:59,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:59,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317814763] [2020-04-18 07:31:59,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481670881] [2020-04-18 07:31:59,680 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:59,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:59,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:59,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:31:59,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:59,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:59,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:31:59,826 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:59,827 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:59,828 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:31:59,828 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:59,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:00,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:00,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:00,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:00,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:00,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:00,100 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 07:32:00,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:32:00,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:00,101 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 20 states. [2020-04-18 07:32:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:00,284 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2020-04-18 07:32:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2020-04-18 07:32:00,285 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:00,285 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1264970570] [2020-04-18 07:32:00,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:00,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:00,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1264970570] [2020-04-18 07:32:00,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 07:32:00,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:00,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:32:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:32:00,287 INFO L87 Difference]: Start difference. First operand 110 states and 273 transitions. Second operand 20 states. [2020-04-18 07:32:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:00,376 INFO L93 Difference]: Finished difference Result 158 states and 382 transitions. [2020-04-18 07:32:00,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 07:32:00,376 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 11 [2020-04-18 07:32:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:00,377 INFO L225 Difference]: With dead ends: 158 [2020-04-18 07:32:00,378 INFO L226 Difference]: Without dead ends: 152 [2020-04-18 07:32:00,378 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:32:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-04-18 07:32:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2020-04-18 07:32:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-18 07:32:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-04-18 07:32:00,383 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 11 [2020-04-18 07:32:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:00,384 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-04-18 07:32:00,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 07:32:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-04-18 07:32:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:00,384 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:00,385 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:00,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,588 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 16 times [2020-04-18 07:32:00,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:00,589 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [714916457] [2020-04-18 07:32:00,590 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:00,592 INFO L259 McrAutomatonBuilder]: Finished intersection with 57 states and 116 transitions. [2020-04-18 07:32:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-04-18 07:32:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:00,593 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 17 times [2020-04-18 07:32:00,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:00,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80532795] [2020-04-18 07:32:00,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80532795] [2020-04-18 07:32:00,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726404211] [2020-04-18 07:32:00,670 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,720 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:00,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:00,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:00,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:00,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:00,808 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:00,808 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:00,810 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 07:32:00,810 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:00,928 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:00,929 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 13 states. [2020-04-18 07:32:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:01,086 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2020-04-18 07:32:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2020-04-18 07:32:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:01,086 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:01,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 18 times [2020-04-18 07:32:01,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:01,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069728651] [2020-04-18 07:32:01,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069728651] [2020-04-18 07:32:01,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313912238] [2020-04-18 07:32:01,228 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:01,289 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:01,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:01,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:01,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:01,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:01,410 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:01,412 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:01,415 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:01,415 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:01,470 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:01,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:01,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:01,470 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand 13 states. [2020-04-18 07:32:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:01,636 INFO L93 Difference]: Finished difference Result 93 states and 178 transitions. [2020-04-18 07:32:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 178 transitions. [2020-04-18 07:32:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:01,637 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:01,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 19 times [2020-04-18 07:32:01,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:01,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428114661] [2020-04-18 07:32:01,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428114661] [2020-04-18 07:32:01,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807911757] [2020-04-18 07:32:01,732 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:01,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:01,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:01,886 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:01,887 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:01,889 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 07:32:01,889 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:01,935 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:01,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:32:01,936 INFO L87 Difference]: Start difference. First operand 93 states and 178 transitions. Second operand 13 states. [2020-04-18 07:32:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:02,134 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2020-04-18 07:32:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 188 transitions. [2020-04-18 07:32:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:02,135 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:02,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 20 times [2020-04-18 07:32:02,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:02,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54945886] [2020-04-18 07:32:02,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54945886] [2020-04-18 07:32:02,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124364108] [2020-04-18 07:32:02,204 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:02,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:02,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:02,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:02,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:02,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:02,358 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:02,358 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:02,361 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 40 transitions. [2020-04-18 07:32:02,361 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:02,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:02,435 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 21 times. [2020-04-18 07:32:02,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:32:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:02,436 INFO L87 Difference]: Start difference. First operand 101 states and 188 transitions. Second operand 14 states. [2020-04-18 07:32:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:02,650 INFO L93 Difference]: Finished difference Result 119 states and 214 transitions. [2020-04-18 07:32:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 214 transitions. [2020-04-18 07:32:02,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:02,650 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:02,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 21 times [2020-04-18 07:32:02,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:02,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767834740] [2020-04-18 07:32:02,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767834740] [2020-04-18 07:32:02,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464681113] [2020-04-18 07:32:02,723 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:02,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:32:02,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:02,771 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:02,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:02,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:02,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:02,888 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:02,889 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:02,890 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:02,891 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:03,024 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:03,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:03,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:32:03,025 INFO L87 Difference]: Start difference. First operand 119 states and 214 transitions. Second operand 13 states. [2020-04-18 07:32:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:03,635 INFO L93 Difference]: Finished difference Result 136 states and 231 transitions. [2020-04-18 07:32:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 231 transitions. [2020-04-18 07:32:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:03,635 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:03,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 22 times [2020-04-18 07:32:03,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:03,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891839076] [2020-04-18 07:32:03,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:03,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891839076] [2020-04-18 07:32:03,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905075173] [2020-04-18 07:32:03,707 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:03,762 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:03,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:03,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:03,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:03,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:03,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:03,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:03,837 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:03,838 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:03,840 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 07:32:03,840 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:04,014 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=1218, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:32:04,016 INFO L87 Difference]: Start difference. First operand 136 states and 231 transitions. Second operand 13 states. [2020-04-18 07:32:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:04,544 INFO L93 Difference]: Finished difference Result 152 states and 241 transitions. [2020-04-18 07:32:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 241 transitions. [2020-04-18 07:32:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:04,545 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 23 times [2020-04-18 07:32:04,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:04,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323568127] [2020-04-18 07:32:04,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:04,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323568127] [2020-04-18 07:32:04,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664630943] [2020-04-18 07:32:04,614 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:04,667 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:04,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:04,668 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:04,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:04,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:04,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:04,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:04,772 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:04,773 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:04,775 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:04,775 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:05,022 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:05,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:05,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:05,024 INFO L87 Difference]: Start difference. First operand 152 states and 241 transitions. Second operand 13 states. [2020-04-18 07:32:05,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:05,434 INFO L93 Difference]: Finished difference Result 164 states and 248 transitions. [2020-04-18 07:32:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2020-04-18 07:32:05,434 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:05,435 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [714916457] [2020-04-18 07:32:05,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:05,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:05,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [714916457] [2020-04-18 07:32:05,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 07:32:05,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:05,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 07:32:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1126, Invalid=3296, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 07:32:05,438 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand 41 states. [2020-04-18 07:32:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:06,402 INFO L93 Difference]: Finished difference Result 287 states and 662 transitions. [2020-04-18 07:32:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-18 07:32:06,402 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 12 [2020-04-18 07:32:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:06,405 INFO L225 Difference]: With dead ends: 287 [2020-04-18 07:32:06,405 INFO L226 Difference]: Without dead ends: 268 [2020-04-18 07:32:06,406 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 203 SyntacticMatches, 24 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1496, Invalid=4510, Unknown=0, NotChecked=0, Total=6006 [2020-04-18 07:32:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-18 07:32:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 131. [2020-04-18 07:32:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-04-18 07:32:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-04-18 07:32:06,412 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 12 [2020-04-18 07:32:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:06,412 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-04-18 07:32:06,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 07:32:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-04-18 07:32:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:06,413 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:06,413 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:07,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:07,819 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:07,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 24 times [2020-04-18 07:32:07,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:07,820 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [511584999] [2020-04-18 07:32:07,821 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:07,822 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 07:32:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 07:32:07,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:07,822 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 25 times [2020-04-18 07:32:07,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:07,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861277905] [2020-04-18 07:32:07,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:07,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861277905] [2020-04-18 07:32:07,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397280159] [2020-04-18 07:32:07,911 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:07,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:07,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:08,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:08,071 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:08,072 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:08,074 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:32:08,074 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:08,200 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:32:08,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:08,201 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 13 states. [2020-04-18 07:32:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:08,406 INFO L93 Difference]: Finished difference Result 84 states and 169 transitions. [2020-04-18 07:32:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2020-04-18 07:32:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:08,408 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 26 times [2020-04-18 07:32:08,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:08,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5259061] [2020-04-18 07:32:08,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5259061] [2020-04-18 07:32:08,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617226084] [2020-04-18 07:32:08,501 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:08,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:08,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:08,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:08,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:08,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:08,699 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:08,700 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:08,702 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 07:32:08,702 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:08,786 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:08,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:08,787 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand 13 states. [2020-04-18 07:32:09,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:09,033 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2020-04-18 07:32:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2020-04-18 07:32:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:09,034 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:09,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 27 times [2020-04-18 07:32:09,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:09,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194641237] [2020-04-18 07:32:09,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194641237] [2020-04-18 07:32:09,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229658455] [2020-04-18 07:32:09,126 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:09,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:09,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:09,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:09,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:09,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:09,269 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:09,269 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:09,271 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 32 transitions. [2020-04-18 07:32:09,272 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:09,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:09,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:09,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:09,435 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:09,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:09,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:32:09,436 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand 15 states. [2020-04-18 07:32:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:09,791 INFO L93 Difference]: Finished difference Result 110 states and 201 transitions. [2020-04-18 07:32:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 201 transitions. [2020-04-18 07:32:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:09,792 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:09,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 28 times [2020-04-18 07:32:09,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:09,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174655652] [2020-04-18 07:32:09,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174655652] [2020-04-18 07:32:09,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843465348] [2020-04-18 07:32:09,886 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:09,931 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:09,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:09,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:09,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:10,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:10,018 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:10,018 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:10,020 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:10,020 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:10,071 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:10,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:32:10,072 INFO L87 Difference]: Start difference. First operand 110 states and 201 transitions. Second operand 13 states. [2020-04-18 07:32:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:10,306 INFO L93 Difference]: Finished difference Result 123 states and 221 transitions. [2020-04-18 07:32:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 221 transitions. [2020-04-18 07:32:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:10,307 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:10,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 29 times [2020-04-18 07:32:10,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:10,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170358811] [2020-04-18 07:32:10,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170358811] [2020-04-18 07:32:10,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258081921] [2020-04-18 07:32:10,406 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:10,459 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:10,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:10,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:10,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:10,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:10,575 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:10,576 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:10,577 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:10,577 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:10,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,629 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:10,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:10,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 07:32:10,633 INFO L87 Difference]: Start difference. First operand 123 states and 221 transitions. Second operand 15 states. [2020-04-18 07:32:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:11,053 INFO L93 Difference]: Finished difference Result 137 states and 239 transitions. [2020-04-18 07:32:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 239 transitions. [2020-04-18 07:32:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:11,054 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:11,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 30 times [2020-04-18 07:32:11,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:11,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153531074] [2020-04-18 07:32:11,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153531074] [2020-04-18 07:32:11,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043273730] [2020-04-18 07:32:11,124 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:11,170 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:11,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:11,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:11,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:11,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:11,281 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:11,282 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:11,284 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:32:11,284 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:11,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,340 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:11,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:11,407 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 17 times. [2020-04-18 07:32:11,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 07:32:11,409 INFO L87 Difference]: Start difference. First operand 137 states and 239 transitions. Second operand 16 states. [2020-04-18 07:32:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:11,833 INFO L93 Difference]: Finished difference Result 156 states and 263 transitions. [2020-04-18 07:32:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 263 transitions. [2020-04-18 07:32:11,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:11,834 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:11,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:11,834 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 31 times [2020-04-18 07:32:11,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:11,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105997069] [2020-04-18 07:32:11,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105997069] [2020-04-18 07:32:11,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930740757] [2020-04-18 07:32:11,912 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:11,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:11,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:12,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:12,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:12,038 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:12,038 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:12,039 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 07:32:12,039 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:12,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:12,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:12,136 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:32:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:32:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=1956, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 07:32:12,138 INFO L87 Difference]: Start difference. First operand 156 states and 263 transitions. Second operand 14 states. [2020-04-18 07:32:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:12,659 INFO L93 Difference]: Finished difference Result 161 states and 267 transitions. [2020-04-18 07:32:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2020-04-18 07:32:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:12,660 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:32:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 32 times [2020-04-18 07:32:12,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:12,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242491770] [2020-04-18 07:32:12,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:12,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242491770] [2020-04-18 07:32:12,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614603564] [2020-04-18 07:32:12,721 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:12,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:12,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:12,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:12,771 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:12,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:12,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:12,884 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:12,887 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:12,890 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:12,890 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:12,995 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:12,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:12,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=2621, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:12,997 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand 13 states. [2020-04-18 07:32:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:13,419 INFO L93 Difference]: Finished difference Result 173 states and 276 transitions. [2020-04-18 07:32:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 276 transitions. [2020-04-18 07:32:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:13,421 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:32:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:13,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 33 times [2020-04-18 07:32:13,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:13,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205442271] [2020-04-18 07:32:13,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:13,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205442271] [2020-04-18 07:32:13,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537896528] [2020-04-18 07:32:13,496 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:13,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:13,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:13,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:13,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:13,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:13,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:13,657 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:13,657 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:13,659 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-04-18 07:32:13,659 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:13,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:13,768 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:32:13,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:32:13,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 07:32:13,770 INFO L87 Difference]: Start difference. First operand 173 states and 276 transitions. Second operand 14 states. [2020-04-18 07:32:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:14,291 INFO L93 Difference]: Finished difference Result 184 states and 285 transitions. [2020-04-18 07:32:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 285 transitions. [2020-04-18 07:32:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:14,292 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:32:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:14,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 34 times [2020-04-18 07:32:14,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:14,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176620854] [2020-04-18 07:32:14,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:14,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176620854] [2020-04-18 07:32:14,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658872003] [2020-04-18 07:32:14,367 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:14,415 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:14,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:14,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:14,416 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:14,498 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:14,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:14,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:14,504 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:14,505 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:14,506 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:14,507 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:14,675 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:14,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:14,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=4356, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 07:32:14,678 INFO L87 Difference]: Start difference. First operand 184 states and 285 transitions. Second operand 13 states. [2020-04-18 07:32:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:15,253 INFO L93 Difference]: Finished difference Result 193 states and 289 transitions. [2020-04-18 07:32:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2020-04-18 07:32:15,254 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:15,255 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [511584999] [2020-04-18 07:32:15,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:15,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:15,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [511584999] [2020-04-18 07:32:15,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-04-18 07:32:15,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:15,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 07:32:15,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5503, Unknown=0, NotChecked=0, Total=7310 [2020-04-18 07:32:15,258 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 49 states. [2020-04-18 07:32:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:16,330 INFO L93 Difference]: Finished difference Result 283 states and 666 transitions. [2020-04-18 07:32:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 07:32:16,330 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 12 [2020-04-18 07:32:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:16,332 INFO L225 Difference]: With dead ends: 283 [2020-04-18 07:32:16,332 INFO L226 Difference]: Without dead ends: 263 [2020-04-18 07:32:16,333 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 264 SyntacticMatches, 25 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2594, Invalid=7912, Unknown=0, NotChecked=0, Total=10506 [2020-04-18 07:32:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-18 07:32:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 136. [2020-04-18 07:32:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-18 07:32:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2020-04-18 07:32:16,339 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 12 [2020-04-18 07:32:16,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:16,339 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2020-04-18 07:32:16,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-04-18 07:32:16,339 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2020-04-18 07:32:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:16,340 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:16,340 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:18,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:18,346 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 9 times [2020-04-18 07:32:18,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:18,348 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [907206181] [2020-04-18 07:32:18,349 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:18,349 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:32:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 07:32:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:18,350 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:18,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:18,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 10 times [2020-04-18 07:32:18,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:18,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704168377] [2020-04-18 07:32:18,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:18,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704168377] [2020-04-18 07:32:18,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865994311] [2020-04-18 07:32:18,467 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:18,530 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:18,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:18,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:18,531 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:18,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:18,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:18,667 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:18,668 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:18,669 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 07:32:18,670 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:18,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,064 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:32:19,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:32:19,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:32:19,065 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 24 states. [2020-04-18 07:32:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:19,303 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2020-04-18 07:32:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-04-18 07:32:19,303 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:19,303 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [907206181] [2020-04-18 07:32:19,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:19,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:32:19,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [907206181] [2020-04-18 07:32:19,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 07:32:19,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:19,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:32:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:32:19,308 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand 24 states. [2020-04-18 07:32:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:19,420 INFO L93 Difference]: Finished difference Result 199 states and 487 transitions. [2020-04-18 07:32:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 07:32:19,421 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2020-04-18 07:32:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:19,423 INFO L225 Difference]: With dead ends: 199 [2020-04-18 07:32:19,423 INFO L226 Difference]: Without dead ends: 193 [2020-04-18 07:32:19,424 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:32:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-18 07:32:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2020-04-18 07:32:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-18 07:32:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 374 transitions. [2020-04-18 07:32:19,429 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 374 transitions. Word has length 12 [2020-04-18 07:32:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:19,429 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 374 transitions. [2020-04-18 07:32:19,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 07:32:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 374 transitions. [2020-04-18 07:32:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:19,430 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:19,430 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:19,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:19,633 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:19,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:19,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 35 times [2020-04-18 07:32:19,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:19,635 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [419858309] [2020-04-18 07:32:19,636 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:19,637 INFO L259 McrAutomatonBuilder]: Finished intersection with 72 states and 153 transitions. [2020-04-18 07:32:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-04-18 07:32:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:19,637 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:19,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:19,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 36 times [2020-04-18 07:32:19,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:19,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125039138] [2020-04-18 07:32:19,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:19,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125039138] [2020-04-18 07:32:19,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164561629] [2020-04-18 07:32:19,717 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:19,765 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:19,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:19,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:19,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:19,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:19,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:19,882 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:19,882 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:19,884 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 32 transitions. [2020-04-18 07:32:19,884 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:20,017 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:20,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:20,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:20,018 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 15 states. [2020-04-18 07:32:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:20,298 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2020-04-18 07:32:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 223 transitions. [2020-04-18 07:32:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:20,299 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 37 times [2020-04-18 07:32:20,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:20,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113328715] [2020-04-18 07:32:20,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:20,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113328715] [2020-04-18 07:32:20,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93584655] [2020-04-18 07:32:20,405 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:20,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:20,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:24,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:24,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:24,729 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:24,730 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:24,731 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:24,732 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:24,843 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:32:24,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:24,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-04-18 07:32:24,844 INFO L87 Difference]: Start difference. First operand 107 states and 223 transitions. Second operand 15 states. [2020-04-18 07:32:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:25,278 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2020-04-18 07:32:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 240 transitions. [2020-04-18 07:32:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:25,279 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:25,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 38 times [2020-04-18 07:32:25,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:25,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293013456] [2020-04-18 07:32:25,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:25,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293013456] [2020-04-18 07:32:25,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80863502] [2020-04-18 07:32:25,362 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:25,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:25,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:25,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:25,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:25,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:25,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:25,508 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:25,508 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:25,510 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:25,510 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:25,987 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=592, Unknown=1, NotChecked=0, Total=870 [2020-04-18 07:32:25,987 INFO L87 Difference]: Start difference. First operand 119 states and 240 transitions. Second operand 15 states. [2020-04-18 07:32:26,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:26,359 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 07:32:26,359 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 07:32:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:26,360 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:26,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:26,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 39 times [2020-04-18 07:32:26,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:26,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477661159] [2020-04-18 07:32:26,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:26,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477661159] [2020-04-18 07:32:26,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682275079] [2020-04-18 07:32:26,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:26,509 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:26,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:26,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:26,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:26,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:26,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:26,614 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:26,615 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:26,616 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:32:26,617 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:26,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:26,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:26,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:26,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:26,841 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:26,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:26,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1320, Unknown=1, NotChecked=0, Total=1806 [2020-04-18 07:32:26,843 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 07:32:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:27,366 INFO L93 Difference]: Finished difference Result 151 states and 280 transitions. [2020-04-18 07:32:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 280 transitions. [2020-04-18 07:32:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:27,367 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:27,368 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 40 times [2020-04-18 07:32:27,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:27,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441982100] [2020-04-18 07:32:27,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:27,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441982100] [2020-04-18 07:32:27,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582864453] [2020-04-18 07:32:27,468 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:27,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:27,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:27,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:27,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:27,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:27,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:27,634 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:27,635 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:27,636 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:32:27,636 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:27,701 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:27,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:27,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=1804, Unknown=1, NotChecked=0, Total=2450 [2020-04-18 07:32:27,701 INFO L87 Difference]: Start difference. First operand 151 states and 280 transitions. Second operand 15 states. [2020-04-18 07:32:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:28,001 INFO L93 Difference]: Finished difference Result 173 states and 321 transitions. [2020-04-18 07:32:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 321 transitions. [2020-04-18 07:32:28,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:28,004 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:28,004 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 41 times [2020-04-18 07:32:28,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:28,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836858800] [2020-04-18 07:32:28,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836858800] [2020-04-18 07:32:28,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116933457] [2020-04-18 07:32:28,107 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:28,147 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:28,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:28,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:28,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:28,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:28,265 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:28,266 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:28,267 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:32:28,267 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:28,309 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:28,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:28,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=1804, Unknown=1, NotChecked=0, Total=2450 [2020-04-18 07:32:28,310 INFO L87 Difference]: Start difference. First operand 173 states and 321 transitions. Second operand 15 states. [2020-04-18 07:32:28,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:28,692 INFO L93 Difference]: Finished difference Result 181 states and 330 transitions. [2020-04-18 07:32:28,692 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 330 transitions. [2020-04-18 07:32:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:28,693 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:28,693 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 42 times [2020-04-18 07:32:28,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:28,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959259833] [2020-04-18 07:32:28,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959259833] [2020-04-18 07:32:28,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619680326] [2020-04-18 07:32:28,802 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:28,855 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:28,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:28,856 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:28,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:28,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:28,977 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:28,977 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:28,979 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:32:28,979 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:28,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:29,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:29,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:29,042 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:29,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:29,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=1964, Unknown=1, NotChecked=0, Total=2652 [2020-04-18 07:32:29,043 INFO L87 Difference]: Start difference. First operand 181 states and 330 transitions. Second operand 17 states. [2020-04-18 07:32:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:29,738 INFO L93 Difference]: Finished difference Result 204 states and 364 transitions. [2020-04-18 07:32:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 364 transitions. [2020-04-18 07:32:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:29,739 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:32:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:29,740 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 43 times [2020-04-18 07:32:29,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:29,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601257949] [2020-04-18 07:32:29,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:29,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601257949] [2020-04-18 07:32:29,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745224801] [2020-04-18 07:32:29,831 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:29,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:29,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:29,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:29,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:29,967 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:29,967 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:29,969 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:32:29,969 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:30,026 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:30,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:30,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=2498, Unknown=1, NotChecked=0, Total=3306 [2020-04-18 07:32:30,027 INFO L87 Difference]: Start difference. First operand 204 states and 364 transitions. Second operand 15 states. [2020-04-18 07:32:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:30,361 INFO L93 Difference]: Finished difference Result 213 states and 378 transitions. [2020-04-18 07:32:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 378 transitions. [2020-04-18 07:32:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:30,362 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:32:30,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 44 times [2020-04-18 07:32:30,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:30,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25242110] [2020-04-18 07:32:30,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:30,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25242110] [2020-04-18 07:32:30,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741303789] [2020-04-18 07:32:30,461 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:30,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:30,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:30,509 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:30,509 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:36,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:36,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:36,737 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:36,737 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:36,740 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:32:36,740 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:36,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:36,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,853 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:36,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:36,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=2673, Unknown=1, NotChecked=0, Total=3540 [2020-04-18 07:32:36,854 INFO L87 Difference]: Start difference. First operand 213 states and 378 transitions. Second operand 17 states. [2020-04-18 07:32:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:37,575 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2020-04-18 07:32:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 400 transitions. [2020-04-18 07:32:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:37,576 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:32:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 45 times [2020-04-18 07:32:37,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:37,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753572058] [2020-04-18 07:32:37,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:37,686 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 07:32:37,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753572058] [2020-04-18 07:32:37,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948821419] [2020-04-18 07:32:37,687 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:37,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:32:37,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:37,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:37,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:37,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:37,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:37,831 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:37,832 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:37,835 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 43 transitions. [2020-04-18 07:32:37,835 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:37,868 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:37,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:37,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:37,972 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:37,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:38,001 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 07:32:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:32:38,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3459, Unknown=1, NotChecked=0, Total=4556 [2020-04-18 07:32:38,002 INFO L87 Difference]: Start difference. First operand 231 states and 400 transitions. Second operand 18 states. [2020-04-18 07:32:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:38,584 INFO L93 Difference]: Finished difference Result 265 states and 451 transitions. [2020-04-18 07:32:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 451 transitions. [2020-04-18 07:32:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:38,585 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:32:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 46 times [2020-04-18 07:32:38,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:38,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003850905] [2020-04-18 07:32:38,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:38,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003850905] [2020-04-18 07:32:38,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847042881] [2020-04-18 07:32:38,691 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:38,735 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:38,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:38,737 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:38,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:44,997 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 07:32:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:45,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:45,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-18 07:32:45,001 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:45,002 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:45,004 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 07:32:45,004 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:45,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:45,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:09,593 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 07:33:09,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:27,928 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 07:33:27,929 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 14 times. [2020-04-18 07:33:27,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:33:27,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1416, Invalid=4265, Unknown=19, NotChecked=0, Total=5700 [2020-04-18 07:33:27,930 INFO L87 Difference]: Start difference. First operand 265 states and 451 transitions. Second operand 18 states. [2020-04-18 07:33:32,897 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-18 07:33:41,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:41,812 INFO L93 Difference]: Finished difference Result 283 states and 476 transitions. [2020-04-18 07:33:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 476 transitions. [2020-04-18 07:33:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:41,813 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:33:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:41,814 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 47 times [2020-04-18 07:33:41,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:41,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673410516] [2020-04-18 07:33:41,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:41,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673410516] [2020-04-18 07:33:41,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91259336] [2020-04-18 07:33:41,894 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:41,937 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:41,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:41,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:41,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:42,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:42,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:42,091 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:42,093 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:42,096 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:33:42,096 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:42,279 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1771, Invalid=5350, Unknown=19, NotChecked=0, Total=7140 [2020-04-18 07:33:42,281 INFO L87 Difference]: Start difference. First operand 283 states and 476 transitions. Second operand 15 states. [2020-04-18 07:33:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:43,132 INFO L93 Difference]: Finished difference Result 299 states and 494 transitions. [2020-04-18 07:33:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 494 transitions. [2020-04-18 07:33:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:43,133 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:33:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:43,133 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 48 times [2020-04-18 07:33:43,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:43,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111953224] [2020-04-18 07:33:43,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:43,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111953224] [2020-04-18 07:33:43,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191687569] [2020-04-18 07:33:43,226 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:43,279 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:33:43,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:43,280 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:43,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:43,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:43,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:43,377 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:43,377 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:43,379 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:33:43,379 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:43,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:43,564 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:33:43,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:33:43,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2279, Invalid=6822, Unknown=19, NotChecked=0, Total=9120 [2020-04-18 07:33:43,566 INFO L87 Difference]: Start difference. First operand 299 states and 494 transitions. Second operand 16 states. [2020-04-18 07:33:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:46,672 INFO L93 Difference]: Finished difference Result 308 states and 503 transitions. [2020-04-18 07:33:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 503 transitions. [2020-04-18 07:33:46,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:46,673 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:33:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:46,674 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 49 times [2020-04-18 07:33:46,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:46,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491598093] [2020-04-18 07:33:46,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:46,744 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 07:33:46,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491598093] [2020-04-18 07:33:46,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484329956] [2020-04-18 07:33:46,744 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:46,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:46,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:46,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:46,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:46,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:46,867 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:46,868 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:46,870 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:33:46,870 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:47,128 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:47,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:47,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2952, Invalid=9018, Unknown=20, NotChecked=0, Total=11990 [2020-04-18 07:33:47,130 INFO L87 Difference]: Start difference. First operand 308 states and 503 transitions. Second operand 15 states. [2020-04-18 07:33:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:48,652 INFO L93 Difference]: Finished difference Result 330 states and 529 transitions. [2020-04-18 07:33:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 529 transitions. [2020-04-18 07:33:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:48,653 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:33:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:48,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 50 times [2020-04-18 07:33:48,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:48,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584424845] [2020-04-18 07:33:48,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:48,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584424845] [2020-04-18 07:33:48,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272919734] [2020-04-18 07:33:48,760 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:48,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:48,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:48,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:48,811 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:48,916 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 07:33:48,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:48,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:48,917 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:48,918 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:48,919 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:33:48,919 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:48,996 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:33:48,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:48,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3705, Invalid=11775, Unknown=20, NotChecked=0, Total=15500 [2020-04-18 07:33:48,998 INFO L87 Difference]: Start difference. First operand 330 states and 529 transitions. Second operand 15 states. [2020-04-18 07:33:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:49,405 INFO L93 Difference]: Finished difference Result 341 states and 536 transitions. [2020-04-18 07:33:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2020-04-18 07:33:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:49,406 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 07:33:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:49,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 51 times [2020-04-18 07:33:49,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:49,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198129814] [2020-04-18 07:33:49,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:49,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198129814] [2020-04-18 07:33:49,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868678095] [2020-04-18 07:33:49,493 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:49,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:33:49,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:49,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:49,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:49,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:49,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:49,650 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:49,651 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:49,652 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:33:49,653 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:49,788 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:33:49,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:49,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3894, Invalid=12598, Unknown=20, NotChecked=0, Total=16512 [2020-04-18 07:33:49,789 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand 15 states. [2020-04-18 07:33:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:52,422 INFO L93 Difference]: Finished difference Result 353 states and 545 transitions. [2020-04-18 07:33:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 545 transitions. [2020-04-18 07:33:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:52,423 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 07:33:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 52 times [2020-04-18 07:33:52,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:52,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516106279] [2020-04-18 07:33:52,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:52,496 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 07:33:52,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516106279] [2020-04-18 07:33:52,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209572307] [2020-04-18 07:33:52,497 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:52,541 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:52,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:52,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:52,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:52,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:52,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:52,656 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:52,657 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:52,658 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:33:52,658 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:52,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:52,846 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:33:52,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:33:52,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4349, Invalid=14262, Unknown=21, NotChecked=0, Total=18632 [2020-04-18 07:33:52,848 INFO L87 Difference]: Start difference. First operand 353 states and 545 transitions. Second operand 16 states. [2020-04-18 07:33:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:54,655 INFO L93 Difference]: Finished difference Result 365 states and 551 transitions. [2020-04-18 07:33:54,655 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 551 transitions. [2020-04-18 07:33:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:54,656 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 07:33:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 53 times [2020-04-18 07:33:54,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:54,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550435226] [2020-04-18 07:33:54,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:54,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550435226] [2020-04-18 07:33:54,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107910587] [2020-04-18 07:33:54,723 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:54,766 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:33:54,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:54,767 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:54,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:55,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:55,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:55,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:55,332 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:55,332 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:55,334 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:33:55,334 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:58,411 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:33:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:58,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5135, Invalid=17190, Unknown=25, NotChecked=0, Total=22350 [2020-04-18 07:33:58,412 INFO L87 Difference]: Start difference. First operand 365 states and 551 transitions. Second operand 15 states. [2020-04-18 07:34:00,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:00,587 INFO L93 Difference]: Finished difference Result 386 states and 564 transitions. [2020-04-18 07:34:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 564 transitions. [2020-04-18 07:34:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:34:00,588 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 07:34:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 54 times [2020-04-18 07:34:00,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:00,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141165820] [2020-04-18 07:34:00,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:00,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141165820] [2020-04-18 07:34:00,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357877096] [2020-04-18 07:34:00,659 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:00,699 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:34:00,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:00,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:34:00,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:00,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:00,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:00,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:34:00,782 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:00,783 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:00,784 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:34:00,784 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:01,158 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:34:01,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:34:01,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6385, Invalid=22320, Unknown=25, NotChecked=0, Total=28730 [2020-04-18 07:34:01,160 INFO L87 Difference]: Start difference. First operand 386 states and 564 transitions. Second operand 15 states. [2020-04-18 07:34:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:02,308 INFO L93 Difference]: Finished difference Result 401 states and 577 transitions. [2020-04-18 07:34:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 577 transitions. [2020-04-18 07:34:02,309 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:34:02,310 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [419858309] [2020-04-18 07:34:02,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:34:02,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:34:02,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [419858309] [2020-04-18 07:34:02,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-04-18 07:34:02,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:34:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-04-18 07:34:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7211, Invalid=25706, Unknown=25, NotChecked=0, Total=32942 [2020-04-18 07:34:02,313 INFO L87 Difference]: Start difference. First operand 146 states and 374 transitions. Second operand 90 states. [2020-04-18 07:34:08,483 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-04-18 07:34:10,431 WARN L192 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-04-18 07:34:15,930 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-04-18 07:34:33,482 WARN L192 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-04-18 07:35:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:12,432 INFO L93 Difference]: Finished difference Result 510 states and 1191 transitions. [2020-04-18 07:35:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-04-18 07:35:12,439 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 13 [2020-04-18 07:35:12,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:12,443 INFO L225 Difference]: With dead ends: 510 [2020-04-18 07:35:12,443 INFO L226 Difference]: Without dead ends: 459 [2020-04-18 07:35:12,445 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 575 SyntacticMatches, 74 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 33285 ImplicationChecksByTransitivity, 80.9s TimeCoverageRelationStatistics Valid=13365, Invalid=49340, Unknown=45, NotChecked=0, Total=62750 [2020-04-18 07:35:12,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-04-18 07:35:12,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 172. [2020-04-18 07:35:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-18 07:35:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 470 transitions. [2020-04-18 07:35:12,453 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 470 transitions. Word has length 13 [2020-04-18 07:35:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:12,454 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 470 transitions. [2020-04-18 07:35:12,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-04-18 07:35:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 470 transitions. [2020-04-18 07:35:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:12,455 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:12,455 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:16,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:16,263 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 55 times [2020-04-18 07:35:16,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:16,265 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1882469058] [2020-04-18 07:35:16,265 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:16,266 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 149 transitions. [2020-04-18 07:35:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 07:35:16,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:16,267 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148993, now seen corresponding path program 56 times [2020-04-18 07:35:16,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:16,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648344940] [2020-04-18 07:35:16,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:16,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648344940] [2020-04-18 07:35:16,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371464717] [2020-04-18 07:35:16,369 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:16,410 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:16,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:16,411 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:16,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:16,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:16,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:16,517 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:16,518 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:16,520 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:35:16,520 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:16,673 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:35:16,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:35:16,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:35:16,674 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 15 states. [2020-04-18 07:35:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:16,967 INFO L93 Difference]: Finished difference Result 106 states and 221 transitions. [2020-04-18 07:35:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2020-04-18 07:35:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:16,968 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:35:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 57 times [2020-04-18 07:35:16,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:16,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50100727] [2020-04-18 07:35:16,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:17,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50100727] [2020-04-18 07:35:17,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449249734] [2020-04-18 07:35:17,073 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:17,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:35:17,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:17,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:17,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:17,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:17,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:17,213 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:17,214 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:17,216 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:35:17,216 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:17,324 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:35:17,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:35:17,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:35:17,325 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand 15 states. [2020-04-18 07:35:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:17,720 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2020-04-18 07:35:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 239 transitions. [2020-04-18 07:35:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:17,721 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:35:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:17,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 58 times [2020-04-18 07:35:17,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:17,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888609404] [2020-04-18 07:35:17,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:17,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888609404] [2020-04-18 07:35:17,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706624310] [2020-04-18 07:35:17,826 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:17,870 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:17,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:17,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:17,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:18,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:18,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:18,427 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:18,428 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:18,429 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:35:18,429 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:18,550 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:35:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:35:18,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 07:35:18,551 INFO L87 Difference]: Start difference. First operand 117 states and 239 transitions. Second operand 15 states. [2020-04-18 07:35:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:19,036 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 07:35:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 07:35:19,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:19,037 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:35:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:19,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 59 times [2020-04-18 07:35:19,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:19,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807576630] [2020-04-18 07:35:19,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:19,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807576630] [2020-04-18 07:35:19,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717349232] [2020-04-18 07:35:19,128 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:19,169 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:35:19,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:19,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:19,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:19,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:19,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:19,755 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:19,756 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:19,758 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:35:19,758 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:19,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:19,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:19,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:19,967 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:35:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=1708, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 07:35:19,968 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 07:35:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:20,636 INFO L93 Difference]: Finished difference Result 156 states and 295 transitions. [2020-04-18 07:35:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 295 transitions. [2020-04-18 07:35:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:20,637 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:35:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 60 times [2020-04-18 07:35:20,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:20,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113286192] [2020-04-18 07:35:20,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:20,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113286192] [2020-04-18 07:35:20,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482723304] [2020-04-18 07:35:20,720 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:20,762 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:35:20,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:20,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:20,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:20,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:20,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:20,852 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:20,853 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:20,855 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:35:20,855 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:20,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:20,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:21,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:21,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:21,021 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:35:21,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:21,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=2478, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 07:35:21,022 INFO L87 Difference]: Start difference. First operand 156 states and 295 transitions. Second operand 17 states. [2020-04-18 07:35:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:21,608 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2020-04-18 07:35:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 302 transitions. [2020-04-18 07:35:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:21,609 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:35:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash 9426703, now seen corresponding path program 61 times [2020-04-18 07:35:21,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:21,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326105410] [2020-04-18 07:35:21,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:21,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326105410] [2020-04-18 07:35:21,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574782471] [2020-04-18 07:35:21,698 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:21,742 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:21,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:21,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:21,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:21,844 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:21,845 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:21,847 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:35:21,847 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:21,905 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:35:21,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:35:21,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3064, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 07:35:21,906 INFO L87 Difference]: Start difference. First operand 164 states and 302 transitions. Second operand 15 states. [2020-04-18 07:35:22,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:22,241 INFO L93 Difference]: Finished difference Result 182 states and 332 transitions. [2020-04-18 07:35:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 332 transitions. [2020-04-18 07:35:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:22,242 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:35:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:22,243 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 62 times [2020-04-18 07:35:22,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:22,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794058720] [2020-04-18 07:35:22,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:22,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794058720] [2020-04-18 07:35:22,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111908952] [2020-04-18 07:35:22,346 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:22,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:22,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:22,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:22,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:22,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:22,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:22,482 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:22,483 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:22,485 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:35:22,485 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:22,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:22,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:22,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:22,588 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:35:22,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:22,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 07:35:22,589 INFO L87 Difference]: Start difference. First operand 182 states and 332 transitions. Second operand 17 states. [2020-04-18 07:35:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:23,247 INFO L93 Difference]: Finished difference Result 201 states and 361 transitions. [2020-04-18 07:35:23,247 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 361 transitions. [2020-04-18 07:35:23,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:23,248 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:35:23,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:23,248 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 63 times [2020-04-18 07:35:23,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:23,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404026259] [2020-04-18 07:35:23,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:23,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404026259] [2020-04-18 07:35:23,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719116080] [2020-04-18 07:35:23,351 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:23,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:35:23,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:23,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:23,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:23,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:23,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:23,889 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:23,890 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:23,892 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:35:23,892 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:23,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:23,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:23,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:23,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:23,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:23,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:24,028 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:35:24,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:35:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=3978, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 07:35:24,030 INFO L87 Difference]: Start difference. First operand 201 states and 361 transitions. Second operand 19 states. [2020-04-18 07:35:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:25,129 INFO L93 Difference]: Finished difference Result 237 states and 410 transitions. [2020-04-18 07:35:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 410 transitions. [2020-04-18 07:35:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:25,129 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:35:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash 646656193, now seen corresponding path program 64 times [2020-04-18 07:35:25,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:25,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25065183] [2020-04-18 07:35:25,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:25,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25065183] [2020-04-18 07:35:25,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79371469] [2020-04-18 07:35:25,237 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:25,281 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:25,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:25,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:25,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:25,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:25,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:25,390 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:25,391 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:25,393 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 39 transitions. [2020-04-18 07:35:25,394 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:25,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,506 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,663 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 07:35:25,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:35:25,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=5905, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 07:35:25,664 INFO L87 Difference]: Start difference. First operand 237 states and 410 transitions. Second operand 20 states. [2020-04-18 07:35:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:26,315 INFO L93 Difference]: Finished difference Result 268 states and 455 transitions. [2020-04-18 07:35:26,315 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 455 transitions. [2020-04-18 07:35:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:26,316 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:35:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 65 times [2020-04-18 07:35:26,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:26,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695270820] [2020-04-18 07:35:26,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:26,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695270820] [2020-04-18 07:35:26,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358148408] [2020-04-18 07:35:26,382 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:26,423 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:26,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:26,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:26,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:26,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:26,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:26,524 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:26,525 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:26,526 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:35:26,527 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:26,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:26,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:26,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:26,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:26,786 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 07:35:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:35:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=7200, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 07:35:26,788 INFO L87 Difference]: Start difference. First operand 268 states and 455 transitions. Second operand 18 states. [2020-04-18 07:35:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:27,615 INFO L93 Difference]: Finished difference Result 284 states and 475 transitions. [2020-04-18 07:35:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 475 transitions. [2020-04-18 07:35:27,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:27,616 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:35:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 66 times [2020-04-18 07:35:27,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:27,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418995336] [2020-04-18 07:35:27,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:27,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418995336] [2020-04-18 07:35:27,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99646] [2020-04-18 07:35:27,678 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:27,720 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:35:27,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:27,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:27,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:27,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:27,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:27,827 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:27,828 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:27,829 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:35:27,829 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:27,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:27,963 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:28,073 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:35:28,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:35:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=8955, Unknown=0, NotChecked=0, Total=11556 [2020-04-18 07:35:28,074 INFO L87 Difference]: Start difference. First operand 284 states and 475 transitions. Second operand 16 states. [2020-04-18 07:35:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:28,984 INFO L93 Difference]: Finished difference Result 303 states and 492 transitions. [2020-04-18 07:35:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 492 transitions. [2020-04-18 07:35:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:28,985 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:35:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 67 times [2020-04-18 07:35:28,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:28,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850924683] [2020-04-18 07:35:28,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:29,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850924683] [2020-04-18 07:35:29,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959598162] [2020-04-18 07:35:29,079 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:29,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:29,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:29,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:29,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:29,743 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:29,743 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:29,744 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:35:29,745 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:29,827 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:35:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3020, Invalid=10552, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 07:35:29,828 INFO L87 Difference]: Start difference. First operand 303 states and 492 transitions. Second operand 15 states. [2020-04-18 07:35:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:30,557 INFO L93 Difference]: Finished difference Result 326 states and 515 transitions. [2020-04-18 07:35:30,557 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 515 transitions. [2020-04-18 07:35:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:30,558 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:35:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:30,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 68 times [2020-04-18 07:35:30,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:30,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90833381] [2020-04-18 07:35:30,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:30,624 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 07:35:30,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90833381] [2020-04-18 07:35:30,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103345430] [2020-04-18 07:35:30,625 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:30,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:30,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:30,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:30,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:30,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:30,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:30,756 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:30,757 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:30,759 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:35:30,759 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:30,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:30,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:30,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:30,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:30,914 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 07:35:30,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:30,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3356, Invalid=11896, Unknown=0, NotChecked=0, Total=15252 [2020-04-18 07:35:30,916 INFO L87 Difference]: Start difference. First operand 326 states and 515 transitions. Second operand 17 states. [2020-04-18 07:35:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:31,901 INFO L93 Difference]: Finished difference Result 350 states and 530 transitions. [2020-04-18 07:35:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2020-04-18 07:35:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:31,902 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:35:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:31,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 69 times [2020-04-18 07:35:31,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:31,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114510491] [2020-04-18 07:35:31,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:31,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114510491] [2020-04-18 07:35:31,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582588378] [2020-04-18 07:35:31,966 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:32,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:35:32,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:32,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:32,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:32,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:32,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:32,118 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:32,119 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:32,120 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:35:32,120 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:32,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:32,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:32,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:32,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:32,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:32,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:32,376 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:35:32,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:35:32,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3866, Invalid=14224, Unknown=0, NotChecked=0, Total=18090 [2020-04-18 07:35:32,378 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand 18 states. [2020-04-18 07:35:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:33,417 INFO L93 Difference]: Finished difference Result 358 states and 536 transitions. [2020-04-18 07:35:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 536 transitions. [2020-04-18 07:35:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:33,418 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:35:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:33,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 70 times [2020-04-18 07:35:33,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:33,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591570459] [2020-04-18 07:35:33,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:33,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591570459] [2020-04-18 07:35:33,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189415402] [2020-04-18 07:35:33,480 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:33,524 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:33,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:33,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:33,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:33,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:33,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:35:33,636 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:33,637 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:33,638 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:35:33,638 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:33,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:33,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:33,840 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:33,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:35:33,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4526, Invalid=16644, Unknown=0, NotChecked=0, Total=21170 [2020-04-18 07:35:33,841 INFO L87 Difference]: Start difference. First operand 358 states and 536 transitions. Second operand 16 states. [2020-04-18 07:35:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:34,802 INFO L93 Difference]: Finished difference Result 359 states and 536 transitions. [2020-04-18 07:35:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 536 transitions. [2020-04-18 07:35:34,802 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:34,804 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1882469058] [2020-04-18 07:35:34,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:34,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:35:34,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1882469058] [2020-04-18 07:35:34,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-04-18 07:35:34,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:34,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-04-18 07:35:34,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4967, Invalid=18289, Unknown=0, NotChecked=0, Total=23256 [2020-04-18 07:35:34,806 INFO L87 Difference]: Start difference. First operand 172 states and 470 transitions. Second operand 80 states. [2020-04-18 07:35:38,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:38,069 INFO L93 Difference]: Finished difference Result 380 states and 911 transitions. [2020-04-18 07:35:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-04-18 07:35:38,069 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 13 [2020-04-18 07:35:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:38,071 INFO L225 Difference]: With dead ends: 380 [2020-04-18 07:35:38,071 INFO L226 Difference]: Without dead ends: 362 [2020-04-18 07:35:38,073 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 425 SyntacticMatches, 60 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20621 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8391, Invalid=29439, Unknown=0, NotChecked=0, Total=37830 [2020-04-18 07:35:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-04-18 07:35:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 177. [2020-04-18 07:35:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-04-18 07:35:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2020-04-18 07:35:38,080 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 13 [2020-04-18 07:35:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:38,080 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2020-04-18 07:35:38,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-04-18 07:35:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2020-04-18 07:35:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:38,081 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:38,081 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:41,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:41,097 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:41,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:41,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 11 times [2020-04-18 07:35:41,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:41,098 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [22495046] [2020-04-18 07:35:41,099 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:41,099 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 41 transitions. [2020-04-18 07:35:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-04-18 07:35:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:35:41,100 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:41,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 12 times [2020-04-18 07:35:41,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:41,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168378179] [2020-04-18 07:35:41,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:41,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168378179] [2020-04-18 07:35:41,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428758094] [2020-04-18 07:35:41,258 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:41,299 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 07:35:41,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:41,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:41,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:41,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:41,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:41,446 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:41,447 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:41,449 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:35:41,449 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:41,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:41,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:41,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:41,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:41,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:41,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:41,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:41,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:41,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:41,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:41,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:41,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:42,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:42,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:35:42,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:42,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:42,154 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 07:35:42,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:35:42,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:35:42,154 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 28 states. [2020-04-18 07:35:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:42,493 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2020-04-18 07:35:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2020-04-18 07:35:42,494 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:42,494 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [22495046] [2020-04-18 07:35:42,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:42,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 07:35:42,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [22495046] [2020-04-18 07:35:42,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 07:35:42,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:35:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:35:42,495 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 28 states. [2020-04-18 07:35:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:42,635 INFO L93 Difference]: Finished difference Result 263 states and 661 transitions. [2020-04-18 07:35:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:35:42,636 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 13 [2020-04-18 07:35:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:42,638 INFO L225 Difference]: With dead ends: 263 [2020-04-18 07:35:42,639 INFO L226 Difference]: Without dead ends: 257 [2020-04-18 07:35:42,639 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:35:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-04-18 07:35:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2020-04-18 07:35:42,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-04-18 07:35:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 496 transitions. [2020-04-18 07:35:42,645 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 496 transitions. Word has length 13 [2020-04-18 07:35:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:42,645 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 496 transitions. [2020-04-18 07:35:42,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 07:35:42,645 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 496 transitions. [2020-04-18 07:35:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:42,646 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:42,646 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:42,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:42,849 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:42,850 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 71 times [2020-04-18 07:35:42,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:42,850 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1009829679] [2020-04-18 07:35:42,851 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:42,853 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 186 transitions. [2020-04-18 07:35:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 07:35:42,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:42,854 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:42,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:42,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 72 times [2020-04-18 07:35:42,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:42,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634828118] [2020-04-18 07:35:42,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:42,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634828118] [2020-04-18 07:35:42,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303342492] [2020-04-18 07:35:42,947 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:42,990 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:35:42,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:42,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:42,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:43,147 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 07:35:43,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:43,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:43,148 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:43,149 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:43,151 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:35:43,151 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:43,324 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:35:43,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:43,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:35:43,325 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 17 states. [2020-04-18 07:35:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:43,706 INFO L93 Difference]: Finished difference Result 130 states and 277 transitions. [2020-04-18 07:35:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 277 transitions. [2020-04-18 07:35:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:43,707 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:35:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:43,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 73 times [2020-04-18 07:35:43,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:43,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374556362] [2020-04-18 07:35:43,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:43,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374556362] [2020-04-18 07:35:43,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418918986] [2020-04-18 07:35:43,807 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:43,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:43,851 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:52,122 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:35:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:52,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:52,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:35:52,123 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:52,125 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:52,127 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 07:35:52,128 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:59,416 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:35:59,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:59,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:35:59,417 INFO L87 Difference]: Start difference. First operand 130 states and 277 transitions. Second operand 17 states. [2020-04-18 07:36:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:00,057 INFO L93 Difference]: Finished difference Result 146 states and 302 transitions. [2020-04-18 07:36:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 302 transitions. [2020-04-18 07:36:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:36:00,058 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:36:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:00,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 74 times [2020-04-18 07:36:00,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:00,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362496378] [2020-04-18 07:36:00,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:00,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362496378] [2020-04-18 07:36:00,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27245435] [2020-04-18 07:36:00,181 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:00,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:36:00,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:00,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:36:00,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:06,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:06,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:36:06,474 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:06,474 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:06,477 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:36:06,477 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:06,696 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:36:06,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:36:06,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=846, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:36:06,696 INFO L87 Difference]: Start difference. First operand 146 states and 302 transitions. Second operand 17 states. [2020-04-18 07:36:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:07,435 INFO L93 Difference]: Finished difference Result 156 states and 315 transitions. [2020-04-18 07:36:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 315 transitions. [2020-04-18 07:36:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:36:07,436 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:36:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:07,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 75 times [2020-04-18 07:36:07,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:07,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385946484] [2020-04-18 07:36:07,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:07,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385946484] [2020-04-18 07:36:07,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328420149] [2020-04-18 07:36:07,551 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:07,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:36:07,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:07,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:36:07,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:07,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:07,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:36:07,849 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:07,851 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:07,854 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:36:07,854 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:10,388 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:36:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:36:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=1496, Unknown=3, NotChecked=0, Total=2162 [2020-04-18 07:36:10,389 INFO L87 Difference]: Start difference. First operand 156 states and 315 transitions. Second operand 17 states. [2020-04-18 07:36:12,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:12,522 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2020-04-18 07:36:12,523 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 330 transitions. [2020-04-18 07:36:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:36:12,523 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:36:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 76 times [2020-04-18 07:36:12,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:12,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797540423] [2020-04-18 07:36:12,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:12,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797540423] [2020-04-18 07:36:12,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100184718] [2020-04-18 07:36:12,617 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:12,661 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:36:12,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:12,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:36:12,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:12,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:12,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:36:12,777 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:12,778 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:12,780 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 07:36:12,780 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:12,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:36:13,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:36:13,244 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:36:13,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:36:13,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3033, Unknown=6, NotChecked=0, Total=4160 [2020-04-18 07:36:13,245 INFO L87 Difference]: Start difference. First operand 169 states and 330 transitions. Second operand 19 states. [2020-04-18 07:36:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:14,301 INFO L93 Difference]: Finished difference Result 207 states and 383 transitions. [2020-04-18 07:36:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 383 transitions. [2020-04-18 07:36:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:36:14,301 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:36:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:14,302 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 77 times [2020-04-18 07:36:14,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:14,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036580897] [2020-04-18 07:36:14,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:14,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036580897] [2020-04-18 07:36:14,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102280153] [2020-04-18 07:36:14,414 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:14,454 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:36:14,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:14,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:36:14,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:14,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:14,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:36:14,582 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:14,583 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:14,586 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 07:36:14,586 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:14,657 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 14 times. [2020-04-18 07:36:14,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:36:14,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=3956, Unknown=6, NotChecked=0, Total=5402 [2020-04-18 07:36:14,658 INFO L87 Difference]: Start difference. First operand 207 states and 383 transitions. Second operand 17 states. [2020-04-18 07:36:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:15,072 INFO L93 Difference]: Finished difference Result 238 states and 445 transitions. [2020-04-18 07:36:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 445 transitions. [2020-04-18 07:36:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:36:15,073 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:36:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 78 times [2020-04-18 07:36:15,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:15,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196912738] [2020-04-18 07:36:15,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:15,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196912738] [2020-04-18 07:36:15,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735348822] [2020-04-18 07:36:15,177 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:15,238 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:36:15,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:15,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:36:15,240 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-04-18 07:36:24,011 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:36:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:24,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:24,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:36:24,012 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:24,013 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:25,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:25,417 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.RuntimeException: de.uni_freiburg.informatik.ultimate.automata.AutomataOperationCanceledException: Timeout or canceled by user. at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.StrategyModuleMcr.getOrConstruct(StrategyModuleMcr.java:128) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.StrategyModuleMcr.isCorrect(StrategyModuleMcr.java:64) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:352) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.automata.AutomataOperationCanceledException: Timeout or canceled by user. at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:947) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.lib.mcr.McrAutomatonBuilder.intersectNwa(McrAutomatonBuilder.java:258) at de.uni_freiburg.informatik.ultimate.lib.mcr.McrAutomatonBuilder.buildMcrAutomaton(McrAutomatonBuilder.java:251) at de.uni_freiburg.informatik.ultimate.lib.mcr.McrAutomatonBuilder.buildInterpolantAutomaton(McrAutomatonBuilder.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.Mcr.exploreInterleavings(Mcr.java:113) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.Mcr.(Mcr.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.StrategyModuleMcr.getOrConstruct(StrategyModuleMcr.java:126) ... 23 more [2020-04-18 07:36:25,421 INFO L168 Benchmark]: Toolchain (without parser) took 281033.99 ms. Allocated memory was 138.4 MB in the beginning and 376.4 MB in the end (delta: 238.0 MB). Free memory was 101.9 MB in the beginning and 274.0 MB in the end (delta: -172.1 MB). Peak memory consumption was 65.9 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:25,422 INFO L168 Benchmark]: CDTParser took 1.39 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-18 07:36:25,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 758.90 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 99.9 MB in the beginning and 157.9 MB in the end (delta: -58.0 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:25,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.61 ms. Allocated memory is still 200.3 MB. Free memory was 157.9 MB in the beginning and 155.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:25,423 INFO L168 Benchmark]: Boogie Preprocessor took 28.30 ms. Allocated memory is still 200.3 MB. Free memory was 155.9 MB in the beginning and 153.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:25,423 INFO L168 Benchmark]: RCFGBuilder took 425.84 ms. Allocated memory is still 200.3 MB. Free memory was 153.9 MB in the beginning and 133.6 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:25,424 INFO L168 Benchmark]: TraceAbstraction took 279720.56 ms. Allocated memory was 200.3 MB in the beginning and 376.4 MB in the end (delta: 176.2 MB). Free memory was 132.9 MB in the beginning and 274.0 MB in the end (delta: -141.1 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. [2020-04-18 07:36:25,425 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.39 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 758.90 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 99.9 MB in the beginning and 157.9 MB in the end (delta: -58.0 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 73.61 ms. Allocated memory is still 200.3 MB. Free memory was 157.9 MB in the beginning and 155.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.30 ms. Allocated memory is still 200.3 MB. Free memory was 155.9 MB in the beginning and 153.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.84 ms. Allocated memory is still 200.3 MB. Free memory was 153.9 MB in the beginning and 133.6 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 279720.56 ms. Allocated memory was 200.3 MB in the beginning and 376.4 MB in the end (delta: 176.2 MB). Free memory was 132.9 MB in the beginning and 274.0 MB in the end (delta: -141.1 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 553 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 879 CheckedPairsTotal, 48 TotalNumberOfCompositions - ExceptionOrErrorResult: RuntimeException: de.uni_freiburg.informatik.ultimate.automata.AutomataOperationCanceledException: Timeout or canceled by user. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: RuntimeException: de.uni_freiburg.informatik.ultimate.automata.AutomataOperationCanceledException: Timeout or canceled by user.: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.StrategyModuleMcr.getOrConstruct(StrategyModuleMcr.java:128) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown