/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 11:47:40,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 11:47:40,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 11:47:40,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 11:47:40,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 11:47:40,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 11:47:40,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 11:47:40,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 11:47:40,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 11:47:40,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 11:47:40,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 11:47:40,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 11:47:40,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 11:47:40,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 11:47:40,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 11:47:40,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 11:47:40,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 11:47:40,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 11:47:40,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 11:47:40,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 11:47:40,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 11:47:40,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 11:47:40,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 11:47:40,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 11:47:40,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 11:47:40,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 11:47:40,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 11:47:40,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 11:47:40,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 11:47:40,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 11:47:40,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 11:47:40,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 11:47:40,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 11:47:40,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 11:47:40,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 11:47:40,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 11:47:40,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 11:47:40,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 11:47:40,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 11:47:40,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 11:47:40,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 11:47:40,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe-McrStrategy.epf [2020-04-18 11:47:40,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 11:47:40,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 11:47:40,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 11:47:40,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 11:47:40,939 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 11:47:40,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 11:47:40,940 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 11:47:40,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 11:47:40,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 11:47:40,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 11:47:40,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 11:47:40,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 11:47:40,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 11:47:40,941 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 11:47:40,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 11:47:40,942 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 11:47:40,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 11:47:40,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 11:47:40,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 11:47:40,943 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 11:47:40,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 11:47:40,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:47:40,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 11:47:40,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 11:47:40,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 11:47:40,944 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 11:47:40,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 11:47:40,944 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-18 11:47:40,944 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 11:47:40,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 11:47:40,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 11:47:41,228 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 11:47:41,239 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 11:47:41,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 11:47:41,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 11:47:41,245 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 11:47:41,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-04-18 11:47:41,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05570e20a/be3cb6b295f44e6d927429b021fb86a9/FLAGfe82de51a [2020-04-18 11:47:41,821 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 11:47:41,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-04-18 11:47:41,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05570e20a/be3cb6b295f44e6d927429b021fb86a9/FLAGfe82de51a [2020-04-18 11:47:42,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05570e20a/be3cb6b295f44e6d927429b021fb86a9 [2020-04-18 11:47:42,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 11:47:42,194 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 11:47:42,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:42,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 11:47:42,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 11:47:42,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c90d1a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42, skipping insertion in model container [2020-04-18 11:47:42,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 11:47:42,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 11:47:42,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:42,813 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 11:47:42,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 11:47:42,936 INFO L208 MainTranslator]: Completed translation [2020-04-18 11:47:42,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42 WrapperNode [2020-04-18 11:47:42,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 11:47:42,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:42,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 11:47:42,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 11:47:42,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 11:47:42,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 11:47:42,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 11:47:42,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 11:47:42,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:42,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... [2020-04-18 11:47:43,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 11:47:43,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 11:47:43,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 11:47:43,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 11:47:43,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 11:47:43,094 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 11:47:43,094 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 11:47:43,094 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 11:47:43,094 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 11:47:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 11:47:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 11:47:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 11:47:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 11:47:43,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 11:47:43,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 11:47:43,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 11:47:43,097 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 11:47:43,453 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 11:47:43,453 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 11:47:43,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:43 BoogieIcfgContainer [2020-04-18 11:47:43,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 11:47:43,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 11:47:43,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 11:47:43,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 11:47:43,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 11:47:42" (1/3) ... [2020-04-18 11:47:43,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d214d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:43, skipping insertion in model container [2020-04-18 11:47:43,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 11:47:42" (2/3) ... [2020-04-18 11:47:43,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d214d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 11:47:43, skipping insertion in model container [2020-04-18 11:47:43,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 11:47:43" (3/3) ... [2020-04-18 11:47:43,466 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-04-18 11:47:43,476 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 11:47:43,477 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 11:47:43,484 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 11:47:43,485 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 11:47:43,512 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,512 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,513 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,513 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,514 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,514 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,514 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,515 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,515 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,515 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,515 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,516 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,516 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,516 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,517 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,517 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,517 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,518 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,518 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,518 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,518 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,519 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,519 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,520 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,520 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,520 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,520 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,521 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,521 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,521 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,525 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,525 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,525 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,526 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,526 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,526 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,533 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,533 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,534 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,534 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,534 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,534 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 11:47:43,559 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 11:47:43,579 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 11:47:43,580 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 11:47:43,580 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 11:47:43,580 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 11:47:43,580 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 11:47:43,580 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 11:47:43,580 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 11:47:43,581 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 11:47:43,595 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,597 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,632 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 11:47:43,633 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:47:43,638 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 11:47:43,641 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 11:47:43,671 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 11:47:43,671 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 11:47:43,672 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 11:47:43,674 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-18 11:47:43,677 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-18 11:47:44,837 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-18 11:47:44,919 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-18 11:47:44,919 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-18 11:47:44,923 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-18 11:47:44,935 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 11:47:44,938 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:47:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:47:44,945 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:44,946 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 11:47:44,947 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:44,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:44,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-18 11:47:44,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:44,962 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1050874202] [2020-04-18 11:47:44,979 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:44,992 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:47:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 11:47:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 11:47:44,995 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 2 times [2020-04-18 11:47:45,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534215089] [2020-04-18 11:47:45,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534215089] [2020-04-18 11:47:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:45,239 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,240 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,242 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 11:47:45,242 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,259 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 11:47:45,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:47:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 11:47:45,265 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 11:47:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,282 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 11:47:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 11:47:45,283 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:45,284 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1050874202] [2020-04-18 11:47:45,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:45,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 11:47:45,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1050874202] [2020-04-18 11:47:45,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 11:47:45,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:45,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 11:47:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,292 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 11:47:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,359 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-18 11:47:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 11:47:45,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 11:47:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:45,373 INFO L225 Difference]: With dead ends: 83 [2020-04-18 11:47:45,373 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 11:47:45,375 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 11:47:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-18 11:47:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 11:47:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-18 11:47:45,419 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-18 11:47:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:45,419 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-18 11:47:45,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 11:47:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-18 11:47:45,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,421 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:45,421 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:45,421 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:45,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,422 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-18 11:47:45,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:45,422 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [966886434] [2020-04-18 11:47:45,423 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,424 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 11:47:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 11:47:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,425 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,426 INFO L82 PathProgramCache]: Analyzing trace with hash 235305767, now seen corresponding path program 2 times [2020-04-18 11:47:45,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752686570] [2020-04-18 11:47:45,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752686570] [2020-04-18 11:47:45,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:45,521 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,522 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,528 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 18 transitions. [2020-04-18 11:47:45,528 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,567 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:45,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:47:45,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 11:47:45,568 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 11:47:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,609 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 11:47:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 11:47:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,611 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 3 times [2020-04-18 11:47:45,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:45,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092366791] [2020-04-18 11:47:45,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:45,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092366791] [2020-04-18 11:47:45,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:45,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:47:45,753 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:45,754 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:45,756 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 11:47:45,756 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:45,770 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:45,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 11:47:45,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:45,771 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 5 states. [2020-04-18 11:47:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,799 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 11:47:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 11:47:45,800 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:45,801 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [966886434] [2020-04-18 11:47:45,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:45,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:47:45,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [966886434] [2020-04-18 11:47:45,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 11:47:45,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:45,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:45,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:47:45,803 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 6 states. [2020-04-18 11:47:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:45,982 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-18 11:47:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 11:47:45,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 11:47:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:45,984 INFO L225 Difference]: With dead ends: 80 [2020-04-18 11:47:45,984 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 11:47:45,986 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 11:47:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-18 11:47:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 11:47:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-18 11:47:45,995 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-18 11:47:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:45,997 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-18 11:47:45,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 11:47:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-18 11:47:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:45,998 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:45,998 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:45,998 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:45,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:45,999 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-18 11:47:45,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:46,000 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [456822953] [2020-04-18 11:47:46,000 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,001 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 11:47:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-04-18 11:47:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 11:47:46,002 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:46,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,002 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 2 times [2020-04-18 11:47:46,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924195654] [2020-04-18 11:47:46,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924195654] [2020-04-18 11:47:46,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 11:47:46,101 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,102 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,104 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-04-18 11:47:46,104 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,146 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:46,147 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2020-04-18 11:47:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,172 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-04-18 11:47:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-04-18 11:47:46,172 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:46,173 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [456822953] [2020-04-18 11:47:46,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:46,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 11:47:46,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [456822953] [2020-04-18 11:47:46,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 11:47:46,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:46,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:46,174 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 6 states. [2020-04-18 11:47:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,221 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-04-18 11:47:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 11:47:46,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 11:47:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:46,223 INFO L225 Difference]: With dead ends: 83 [2020-04-18 11:47:46,223 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 11:47:46,224 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 11:47:46,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 11:47:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-04-18 11:47:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 11:47:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-18 11:47:46,234 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-18 11:47:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:46,234 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-18 11:47:46,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 11:47:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-18 11:47:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,235 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:46,235 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:46,236 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 4 times [2020-04-18 11:47:46,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:46,237 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1358740741] [2020-04-18 11:47:46,237 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,237 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 11:47:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:47:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,239 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1295455160, now seen corresponding path program 5 times [2020-04-18 11:47:46,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139138502] [2020-04-18 11:47:46,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 11:47:46,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139138502] [2020-04-18 11:47:46,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:46,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 11:47:46,296 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,297 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,299 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:46,299 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,333 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 11:47:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:46,334 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-04-18 11:47:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,379 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2020-04-18 11:47:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2020-04-18 11:47:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,379 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1294792070, now seen corresponding path program 6 times [2020-04-18 11:47:46,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201430607] [2020-04-18 11:47:46,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201430607] [2020-04-18 11:47:46,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723770363] [2020-04-18 11:47:46,435 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:46,491 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:46,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:46,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 11:47:46,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:46,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:46,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-04-18 11:47:46,580 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,581 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,586 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2020-04-18 11:47:46,587 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,635 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:47:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:46,636 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2020-04-18 11:47:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:46,700 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 11:47:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 11:47:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:46,701 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:46,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:46,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 7 times [2020-04-18 11:47:46,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:46,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885505657] [2020-04-18 11:47:46,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885505657] [2020-04-18 11:47:46,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110009886] [2020-04-18 11:47:46,768 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:46,827 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:47:46,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:46,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:46,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:46,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-18 11:47:46,899 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:46,900 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:46,901 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:46,901 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:46,951 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:46,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:47:46,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:47:46,952 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 10 states. [2020-04-18 11:47:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:47,009 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 11:47:47,009 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 11:47:47,010 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:47,010 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1358740741] [2020-04-18 11:47:47,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:47,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:47,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1358740741] [2020-04-18 11:47:47,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:47:47,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:47,012 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 12 states. [2020-04-18 11:47:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:47,248 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-18 11:47:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:47:47,248 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 11:47:47,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:47,250 INFO L225 Difference]: With dead ends: 101 [2020-04-18 11:47:47,250 INFO L226 Difference]: Without dead ends: 96 [2020-04-18 11:47:47,251 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:47:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-18 11:47:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-18 11:47:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 11:47:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-18 11:47:47,260 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-18 11:47:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:47,260 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-18 11:47:47,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:47:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-18 11:47:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:47,262 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:47,262 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:47,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:47,670 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:47,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:47,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-18 11:47:47,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:47,671 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [479232130] [2020-04-18 11:47:47,672 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:47,672 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 11:47:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 11:47:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 11:47:47,673 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 4 times [2020-04-18 11:47:47,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:47,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053825574] [2020-04-18 11:47:47,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:47,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053825574] [2020-04-18 11:47:47,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412765634] [2020-04-18 11:47:47,768 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:47,814 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:47:47,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:47,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 11:47:47,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:47,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:47,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-18 11:47:47,909 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:47,910 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:47,911 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-04-18 11:47:47,912 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:47,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:47,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:47,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:48,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,047 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:48,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:48,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:47:48,048 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 12 states. [2020-04-18 11:47:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,113 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2020-04-18 11:47:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-04-18 11:47:48,113 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:48,114 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [479232130] [2020-04-18 11:47:48,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:48,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:48,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [479232130] [2020-04-18 11:47:48,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 11:47:48,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:48,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:48,116 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 12 states. [2020-04-18 11:47:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,169 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-04-18 11:47:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 11:47:48,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 11:47:48,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:48,171 INFO L225 Difference]: With dead ends: 104 [2020-04-18 11:47:48,171 INFO L226 Difference]: Without dead ends: 98 [2020-04-18 11:47:48,172 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-18 11:47:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-04-18 11:47:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 11:47:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-18 11:47:48,180 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 9 [2020-04-18 11:47:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:48,181 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-18 11:47:48,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 11:47:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-18 11:47:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,182 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:48,182 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:48,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:48,389 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:48,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-18 11:47:48,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:48,390 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1918151245] [2020-04-18 11:47:48,391 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,392 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 11:47:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 11:47:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,393 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:48,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 2 times [2020-04-18 11:47:48,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945401573] [2020-04-18 11:47:48,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945401573] [2020-04-18 11:47:48,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:48,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:48,464 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,465 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,467 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-04-18 11:47:48,468 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,513 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:48,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 11:47:48,514 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-04-18 11:47:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,570 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2020-04-18 11:47:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 79 transitions. [2020-04-18 11:47:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,571 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:48,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 3 times [2020-04-18 11:47:48,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000827178] [2020-04-18 11:47:48,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000827178] [2020-04-18 11:47:48,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:48,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:48,645 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,646 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,647 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:48,648 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:48,689 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:47:48,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 11:47:48,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-04-18 11:47:48,690 INFO L87 Difference]: Start difference. First operand 45 states and 79 transitions. Second operand 7 states. [2020-04-18 11:47:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,767 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2020-04-18 11:47:48,767 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 83 transitions. [2020-04-18 11:47:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:48,768 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:48,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-18 11:47:48,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:48,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625416288] [2020-04-18 11:47:48,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:48,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625416288] [2020-04-18 11:47:48,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 11:47:48,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 11:47:48,842 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:48,843 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:48,845 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 11:47:48,845 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:48,877 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 11:47:48,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 11:47:48,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-18 11:47:48,878 INFO L87 Difference]: Start difference. First operand 50 states and 83 transitions. Second operand 6 states. [2020-04-18 11:47:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:48,946 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2020-04-18 11:47:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2020-04-18 11:47:48,946 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:48,947 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1918151245] [2020-04-18 11:47:48,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:48,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 11:47:48,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1918151245] [2020-04-18 11:47:48,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 11:47:48,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:48,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:48,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-18 11:47:48,948 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 11 states. [2020-04-18 11:47:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,036 INFO L93 Difference]: Finished difference Result 124 states and 288 transitions. [2020-04-18 11:47:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 11:47:49,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-18 11:47:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:49,038 INFO L225 Difference]: With dead ends: 124 [2020-04-18 11:47:49,039 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 11:47:49,039 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 11:47:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-04-18 11:47:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-18 11:47:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 210 transitions. [2020-04-18 11:47:49,048 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 210 transitions. Word has length 10 [2020-04-18 11:47:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:49,048 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 210 transitions. [2020-04-18 11:47:49,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 11:47:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 210 transitions. [2020-04-18 11:47:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:49,049 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:49,049 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:49,049 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 5 times [2020-04-18 11:47:49,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:49,050 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [672765542] [2020-04-18 11:47:49,051 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,051 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 11:47:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 11:47:49,052 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-18 11:47:49,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:49,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826969715] [2020-04-18 11:47:49,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826969715] [2020-04-18 11:47:49,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892752717] [2020-04-18 11:47:49,141 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:49,191 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:49,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:49,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:49,194 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:49,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:49,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:49,296 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:49,296 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,297 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 11:47:49,298 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:49,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:49,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:49,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:49,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:49,530 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:47:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:47:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:47:49,531 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 16 states. [2020-04-18 11:47:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,664 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-04-18 11:47:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-04-18 11:47:49,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:49,665 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [672765542] [2020-04-18 11:47:49,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:49,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:49,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [672765542] [2020-04-18 11:47:49,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 11:47:49,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:49,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:47:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:49,666 INFO L87 Difference]: Start difference. First operand 87 states and 210 transitions. Second operand 16 states. [2020-04-18 11:47:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:49,740 INFO L93 Difference]: Finished difference Result 122 states and 292 transitions. [2020-04-18 11:47:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 11:47:49,741 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-04-18 11:47:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:49,742 INFO L225 Difference]: With dead ends: 122 [2020-04-18 11:47:49,742 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 11:47:49,742 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 11:47:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-04-18 11:47:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-18 11:47:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-04-18 11:47:49,750 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 10 [2020-04-18 11:47:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:49,750 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-04-18 11:47:49,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 11:47:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-04-18 11:47:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:49,751 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:49,752 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:49,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:49,962 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-18 11:47:49,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:49,963 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1468443490] [2020-04-18 11:47:49,964 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:49,965 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 91 transitions. [2020-04-18 11:47:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 11:47:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:49,967 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:49,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 6 times [2020-04-18 11:47:49,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:49,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36567262] [2020-04-18 11:47:49,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36567262] [2020-04-18 11:47:50,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500780412] [2020-04-18 11:47:50,037 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:50,088 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:50,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:50,090 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:50,091 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:50,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:50,216 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:50,217 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:50,219 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 28 transitions. [2020-04-18 11:47:50,219 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:50,310 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:50,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:50,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:50,312 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 11 states. [2020-04-18 11:47:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,416 INFO L93 Difference]: Finished difference Result 62 states and 117 transitions. [2020-04-18 11:47:50,416 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 117 transitions. [2020-04-18 11:47:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,417 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 7 times [2020-04-18 11:47:50,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:50,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867869339] [2020-04-18 11:47:50,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867869339] [2020-04-18 11:47:50,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556371415] [2020-04-18 11:47:50,514 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:50,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:50,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:50,679 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:50,680 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:50,682 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 11:47:50,683 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:50,741 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:50,742 INFO L87 Difference]: Start difference. First operand 62 states and 117 transitions. Second operand 11 states. [2020-04-18 11:47:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:50,886 INFO L93 Difference]: Finished difference Result 70 states and 127 transitions. [2020-04-18 11:47:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 127 transitions. [2020-04-18 11:47:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:50,887 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 8 times [2020-04-18 11:47:50,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:50,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526784540] [2020-04-18 11:47:50,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:50,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526784540] [2020-04-18 11:47:50,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961306786] [2020-04-18 11:47:50,969 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:51,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:51,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:51,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:47:51,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:51,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-18 11:47:51,064 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:51,065 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:51,071 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:47:51,071 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:51,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:51,161 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:47:51,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 11:47:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-18 11:47:51,162 INFO L87 Difference]: Start difference. First operand 70 states and 127 transitions. Second operand 9 states. [2020-04-18 11:47:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:51,314 INFO L93 Difference]: Finished difference Result 81 states and 141 transitions. [2020-04-18 11:47:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-04-18 11:47:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:51,315 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:51,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 9 times [2020-04-18 11:47:51,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:51,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417700348] [2020-04-18 11:47:51,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417700348] [2020-04-18 11:47:51,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656280604] [2020-04-18 11:47:51,388 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:51,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:47:51,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:51,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:51,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:51,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:51,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:51,496 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:51,497 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:51,499 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-04-18 11:47:51,499 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:51,580 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:47:51,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:51,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-18 11:47:51,581 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 11 states. [2020-04-18 11:47:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:51,904 INFO L93 Difference]: Finished difference Result 90 states and 146 transitions. [2020-04-18 11:47:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 146 transitions. [2020-04-18 11:47:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:51,905 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:47:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 10 times [2020-04-18 11:47:51,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:51,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810444585] [2020-04-18 11:47:51,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:51,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810444585] [2020-04-18 11:47:51,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204676285] [2020-04-18 11:47:51,970 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:52,023 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:47:52,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:52,024 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:52,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:52,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:52,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:52,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:52,073 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:52,074 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:52,075 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-04-18 11:47:52,075 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:52,197 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:47:52,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:52,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:47:52,199 INFO L87 Difference]: Start difference. First operand 90 states and 146 transitions. Second operand 11 states. [2020-04-18 11:47:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:52,452 INFO L93 Difference]: Finished difference Result 97 states and 149 transitions. [2020-04-18 11:47:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 149 transitions. [2020-04-18 11:47:52,452 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:52,453 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1468443490] [2020-04-18 11:47:52,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:52,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:52,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1468443490] [2020-04-18 11:47:52,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 11:47:52,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:52,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:47:52,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1184, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 11:47:52,455 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 28 states. [2020-04-18 11:47:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:52,825 INFO L93 Difference]: Finished difference Result 217 states and 499 transitions. [2020-04-18 11:47:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 11:47:52,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 11 [2020-04-18 11:47:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:52,829 INFO L225 Difference]: With dead ends: 217 [2020-04-18 11:47:52,829 INFO L226 Difference]: Without dead ends: 198 [2020-04-18 11:47:52,831 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1573, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 11:47:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-18 11:47:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 107. [2020-04-18 11:47:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-04-18 11:47:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 271 transitions. [2020-04-18 11:47:52,839 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 271 transitions. Word has length 11 [2020-04-18 11:47:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:52,839 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 271 transitions. [2020-04-18 11:47:52,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 11:47:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 271 transitions. [2020-04-18 11:47:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:52,840 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:52,840 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:53,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:53,845 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 11 times [2020-04-18 11:47:53,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:53,847 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [669143564] [2020-04-18 11:47:53,847 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:53,848 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 11:47:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 11:47:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:53,849 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:53,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:53,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 12 times [2020-04-18 11:47:53,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:53,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899704514] [2020-04-18 11:47:53,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:53,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899704514] [2020-04-18 11:47:53,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000555013] [2020-04-18 11:47:53,929 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:53,980 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:53,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:53,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:53,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:54,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:54,067 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:54,067 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:54,069 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 11:47:54,069 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:54,150 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:47:54,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 11:47:54,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 11:47:54,151 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2020-04-18 11:47:54,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:54,291 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2020-04-18 11:47:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 11:47:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:54,292 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 13 times [2020-04-18 11:47:54,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:54,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930739340] [2020-04-18 11:47:54,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930739340] [2020-04-18 11:47:54,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90970281] [2020-04-18 11:47:54,380 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:54,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:54,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:54,507 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:54,508 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:54,510 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 11:47:54,510 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:54,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:54,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:54,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:54,633 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:54,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:54,634 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 13 states. [2020-04-18 11:47:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:54,844 INFO L93 Difference]: Finished difference Result 71 states and 126 transitions. [2020-04-18 11:47:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2020-04-18 11:47:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:54,844 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 14 times [2020-04-18 11:47:54,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:54,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685816628] [2020-04-18 11:47:54,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:54,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685816628] [2020-04-18 11:47:54,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472749862] [2020-04-18 11:47:54,915 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:54,969 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:54,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:54,970 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:54,971 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:55,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:55,039 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:55,040 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:55,042 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 11:47:55,042 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:55,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,157 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:47:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:47:55,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:47:55,158 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 14 states. [2020-04-18 11:47:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:55,399 INFO L93 Difference]: Finished difference Result 79 states and 134 transitions. [2020-04-18 11:47:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 134 transitions. [2020-04-18 11:47:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:55,400 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 15 times [2020-04-18 11:47:55,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:55,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152604973] [2020-04-18 11:47:55,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152604973] [2020-04-18 11:47:55,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975425943] [2020-04-18 11:47:55,499 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:55,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:47:55,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:55,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 11:47:55,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:55,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:55,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 11:47:55,612 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:55,612 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:55,614 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 11:47:55,614 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:55,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:55,657 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:47:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 11:47:55,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:47:55,658 INFO L87 Difference]: Start difference. First operand 79 states and 134 transitions. Second operand 12 states. [2020-04-18 11:47:55,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:55,889 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2020-04-18 11:47:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2020-04-18 11:47:55,890 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:55,891 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [669143564] [2020-04-18 11:47:55,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:55,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 11:47:55,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [669143564] [2020-04-18 11:47:55,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 11:47:55,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:55,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 11:47:55,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:47:55,894 INFO L87 Difference]: Start difference. First operand 107 states and 271 transitions. Second operand 23 states. [2020-04-18 11:47:56,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:56,044 INFO L93 Difference]: Finished difference Result 153 states and 367 transitions. [2020-04-18 11:47:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:47:56,045 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 11 [2020-04-18 11:47:56,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:56,046 INFO L225 Difference]: With dead ends: 153 [2020-04-18 11:47:56,046 INFO L226 Difference]: Without dead ends: 148 [2020-04-18 11:47:56,048 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 11:47:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-18 11:47:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2020-04-18 11:47:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-18 11:47:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2020-04-18 11:47:56,059 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 11 [2020-04-18 11:47:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:56,059 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2020-04-18 11:47:56,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 11:47:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2020-04-18 11:47:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:56,060 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:56,060 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:56,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:56,866 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 7 times [2020-04-18 11:47:56,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:56,868 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [118531835] [2020-04-18 11:47:56,868 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:56,869 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 11:47:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 11:47:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 11:47:56,869 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 8 times [2020-04-18 11:47:56,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:56,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503448724] [2020-04-18 11:47:56,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:56,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503448724] [2020-04-18 11:47:56,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451925929] [2020-04-18 11:47:56,975 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:57,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:57,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:57,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:57,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:57,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:57,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:57,115 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:57,116 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:57,117 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 11:47:57,117 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:57,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:47:57,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:57,424 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:47:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:47:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:47:57,425 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 20 states. [2020-04-18 11:47:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:57,616 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2020-04-18 11:47:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2020-04-18 11:47:57,616 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:47:57,617 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [118531835] [2020-04-18 11:47:57,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:47:57,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:47:57,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [118531835] [2020-04-18 11:47:57,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 11:47:57,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:47:57,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:47:57,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:47:57,618 INFO L87 Difference]: Start difference. First operand 110 states and 273 transitions. Second operand 20 states. [2020-04-18 11:47:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:57,731 INFO L93 Difference]: Finished difference Result 158 states and 382 transitions. [2020-04-18 11:47:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 11:47:57,731 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 11 [2020-04-18 11:47:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:47:57,732 INFO L225 Difference]: With dead ends: 158 [2020-04-18 11:47:57,732 INFO L226 Difference]: Without dead ends: 152 [2020-04-18 11:47:57,733 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 11:47:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-04-18 11:47:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2020-04-18 11:47:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-18 11:47:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-04-18 11:47:57,737 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 11 [2020-04-18 11:47:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:47:57,738 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-04-18 11:47:57,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 11:47:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-04-18 11:47:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:57,738 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:47:57,739 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:47:57,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:57,939 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:47:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 16 times [2020-04-18 11:47:57,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:47:57,941 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [509765612] [2020-04-18 11:47:57,942 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:57,942 INFO L259 McrAutomatonBuilder]: Finished intersection with 57 states and 116 transitions. [2020-04-18 11:47:57,943 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-04-18 11:47:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:57,943 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:47:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 17 times [2020-04-18 11:47:57,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:57,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420793846] [2020-04-18 11:47:57,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420793846] [2020-04-18 11:47:58,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629426831] [2020-04-18 11:47:58,010 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:58,053 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:58,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:58,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:58,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:58,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:58,142 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:58,142 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:58,144 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 11:47:58,144 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:58,264 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:47:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:47:58,264 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 13 states. [2020-04-18 11:47:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:58,417 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2020-04-18 11:47:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2020-04-18 11:47:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:58,418 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:47:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 18 times [2020-04-18 11:47:58,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:58,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942850433] [2020-04-18 11:47:58,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942850433] [2020-04-18 11:47:58,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415113670] [2020-04-18 11:47:58,521 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:58,578 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:47:58,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:58,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:58,581 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:58,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:58,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:58,688 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:58,689 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:58,691 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:47:58,691 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:58,732 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:47:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:58,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:47:58,733 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand 13 states. [2020-04-18 11:47:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:58,906 INFO L93 Difference]: Finished difference Result 93 states and 178 transitions. [2020-04-18 11:47:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 178 transitions. [2020-04-18 11:47:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:58,907 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:47:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 19 times [2020-04-18 11:47:58,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:58,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927615204] [2020-04-18 11:47:58,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927615204] [2020-04-18 11:47:59,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731968048] [2020-04-18 11:47:59,022 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,073 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:47:59,074 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:59,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:47:59,164 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:59,165 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:59,167 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 11:47:59,167 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:59,220 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:47:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:47:59,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:47:59,221 INFO L87 Difference]: Start difference. First operand 93 states and 178 transitions. Second operand 13 states. [2020-04-18 11:47:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:59,444 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2020-04-18 11:47:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 188 transitions. [2020-04-18 11:47:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:59,445 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:47:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:59,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 20 times [2020-04-18 11:47:59,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:59,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315820961] [2020-04-18 11:47:59,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:47:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315820961] [2020-04-18 11:47:59,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025360258] [2020-04-18 11:47:59,546 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:47:59,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:47:59,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:47:59,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:47:59,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:47:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:47:59,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:47:59,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-18 11:47:59,642 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:47:59,643 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:47:59,645 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 40 transitions. [2020-04-18 11:47:59,646 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:47:59,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:47:59,708 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:47:59,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 11:47:59,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:47:59,709 INFO L87 Difference]: Start difference. First operand 101 states and 188 transitions. Second operand 10 states. [2020-04-18 11:47:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:47:59,905 INFO L93 Difference]: Finished difference Result 119 states and 214 transitions. [2020-04-18 11:47:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 214 transitions. [2020-04-18 11:47:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:47:59,907 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:47:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:47:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 21 times [2020-04-18 11:47:59,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:47:59,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104870297] [2020-04-18 11:47:59,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:47:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104870297] [2020-04-18 11:48:00,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369757744] [2020-04-18 11:48:00,006 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:00,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:48:00,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:00,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:00,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:00,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:00,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:00,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:00,261 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:00,263 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:00,266 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:48:00,266 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:00,496 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:48:00,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:48:00,498 INFO L87 Difference]: Start difference. First operand 119 states and 214 transitions. Second operand 13 states. [2020-04-18 11:48:01,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:01,197 INFO L93 Difference]: Finished difference Result 136 states and 231 transitions. [2020-04-18 11:48:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 231 transitions. [2020-04-18 11:48:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:01,198 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:01,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 22 times [2020-04-18 11:48:01,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:01,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601668167] [2020-04-18 11:48:01,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:01,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601668167] [2020-04-18 11:48:01,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858977489] [2020-04-18 11:48:01,279 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:01,325 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:01,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:01,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:01,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:01,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:01,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:01,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:01,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:01,432 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:01,433 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:01,434 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 11:48:01,434 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:01,591 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:01,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:01,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1222, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 11:48:01,595 INFO L87 Difference]: Start difference. First operand 136 states and 231 transitions. Second operand 13 states. [2020-04-18 11:48:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:02,086 INFO L93 Difference]: Finished difference Result 152 states and 241 transitions. [2020-04-18 11:48:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 241 transitions. [2020-04-18 11:48:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:02,087 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:02,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:02,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 23 times [2020-04-18 11:48:02,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:02,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497038146] [2020-04-18 11:48:02,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:02,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497038146] [2020-04-18 11:48:02,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519947691] [2020-04-18 11:48:02,158 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:02,207 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:02,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:02,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:02,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:02,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:02,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:02,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:02,317 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:02,317 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:02,319 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:02,319 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:02,565 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:02,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:02,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:02,567 INFO L87 Difference]: Start difference. First operand 152 states and 241 transitions. Second operand 13 states. [2020-04-18 11:48:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:02,994 INFO L93 Difference]: Finished difference Result 164 states and 248 transitions. [2020-04-18 11:48:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2020-04-18 11:48:02,995 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:02,996 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [509765612] [2020-04-18 11:48:02,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:02,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:48:02,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [509765612] [2020-04-18 11:48:02,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 11:48:02,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 11:48:02,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=3294, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:48:02,999 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand 41 states. [2020-04-18 11:48:03,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:03,896 INFO L93 Difference]: Finished difference Result 287 states and 662 transitions. [2020-04-18 11:48:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-18 11:48:03,897 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 12 [2020-04-18 11:48:03,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:03,900 INFO L225 Difference]: With dead ends: 287 [2020-04-18 11:48:03,900 INFO L226 Difference]: Without dead ends: 268 [2020-04-18 11:48:03,902 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 192 SyntacticMatches, 25 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1498, Invalid=4508, Unknown=0, NotChecked=0, Total=6006 [2020-04-18 11:48:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-18 11:48:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 131. [2020-04-18 11:48:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-04-18 11:48:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-04-18 11:48:03,913 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 12 [2020-04-18 11:48:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:03,913 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-04-18 11:48:03,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 11:48:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-04-18 11:48:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:03,914 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:03,914 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:05,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:05,322 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 24 times [2020-04-18 11:48:05,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:05,323 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [885749744] [2020-04-18 11:48:05,324 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:05,325 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 11:48:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 11:48:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:05,325 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 25 times [2020-04-18 11:48:05,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:05,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227927522] [2020-04-18 11:48:05,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:05,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227927522] [2020-04-18 11:48:05,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305886390] [2020-04-18 11:48:05,402 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:05,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:05,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:05,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:05,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:05,550 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:05,551 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:05,552 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 11:48:05,552 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:05,656 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:48:05,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:05,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 11:48:05,656 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 13 states. [2020-04-18 11:48:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:05,855 INFO L93 Difference]: Finished difference Result 84 states and 169 transitions. [2020-04-18 11:48:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2020-04-18 11:48:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:05,856 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:48:05,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:05,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 26 times [2020-04-18 11:48:05,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:05,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091933465] [2020-04-18 11:48:05,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:05,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091933465] [2020-04-18 11:48:05,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324580780] [2020-04-18 11:48:05,946 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:05,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:05,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:05,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:05,996 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:06,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:06,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:06,090 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:06,091 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:06,093 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 11:48:06,093 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:06,162 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:06,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:06,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-04-18 11:48:06,163 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand 13 states. [2020-04-18 11:48:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:06,432 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2020-04-18 11:48:06,432 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2020-04-18 11:48:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:06,433 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:48:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 27 times [2020-04-18 11:48:06,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:06,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754839761] [2020-04-18 11:48:06,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:06,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754839761] [2020-04-18 11:48:06,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849219502] [2020-04-18 11:48:06,521 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:06,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:06,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:06,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:06,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:06,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:06,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:06,654 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:06,655 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:06,657 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 32 transitions. [2020-04-18 11:48:06,657 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:06,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:06,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:06,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:06,812 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:06,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:06,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:48:06,813 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand 15 states. [2020-04-18 11:48:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:07,165 INFO L93 Difference]: Finished difference Result 110 states and 201 transitions. [2020-04-18 11:48:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 201 transitions. [2020-04-18 11:48:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:07,166 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:48:07,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:07,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 28 times [2020-04-18 11:48:07,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:07,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708753748] [2020-04-18 11:48:07,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708753748] [2020-04-18 11:48:07,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533181487] [2020-04-18 11:48:07,257 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:07,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:07,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:07,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:07,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:07,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:07,385 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:07,386 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:07,387 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:07,387 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:07,429 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 11:48:07,430 INFO L87 Difference]: Start difference. First operand 110 states and 201 transitions. Second operand 13 states. [2020-04-18 11:48:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:07,658 INFO L93 Difference]: Finished difference Result 123 states and 221 transitions. [2020-04-18 11:48:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 221 transitions. [2020-04-18 11:48:07,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:07,659 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:07,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 29 times [2020-04-18 11:48:07,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:07,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034832118] [2020-04-18 11:48:07,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034832118] [2020-04-18 11:48:07,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832677056] [2020-04-18 11:48:07,740 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:07,784 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:07,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:07,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:07,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:07,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:07,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:07,873 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:07,874 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:07,876 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:07,876 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:07,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:07,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:07,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:07,953 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:07,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:07,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 11:48:07,954 INFO L87 Difference]: Start difference. First operand 123 states and 221 transitions. Second operand 15 states. [2020-04-18 11:48:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:08,485 INFO L93 Difference]: Finished difference Result 137 states and 239 transitions. [2020-04-18 11:48:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 239 transitions. [2020-04-18 11:48:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:08,486 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:08,487 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 30 times [2020-04-18 11:48:08,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:08,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046086272] [2020-04-18 11:48:08,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:08,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046086272] [2020-04-18 11:48:08,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092932013] [2020-04-18 11:48:08,560 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:08,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:08,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:08,609 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:08,610 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:08,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:08,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:08,700 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:08,701 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:08,705 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 11:48:08,706 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:08,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:08,850 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 17 times. [2020-04-18 11:48:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 11:48:08,851 INFO L87 Difference]: Start difference. First operand 137 states and 239 transitions. Second operand 16 states. [2020-04-18 11:48:09,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:09,241 INFO L93 Difference]: Finished difference Result 156 states and 263 transitions. [2020-04-18 11:48:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 263 transitions. [2020-04-18 11:48:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:09,243 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 31 times [2020-04-18 11:48:09,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:09,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472392841] [2020-04-18 11:48:09,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:09,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472392841] [2020-04-18 11:48:09,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635843194] [2020-04-18 11:48:09,325 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:09,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:09,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:09,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:09,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:09,527 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:09,528 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:09,531 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 11:48:09,531 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:09,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:09,693 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:48:09,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:48:09,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=1956, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 11:48:09,695 INFO L87 Difference]: Start difference. First operand 156 states and 263 transitions. Second operand 14 states. [2020-04-18 11:48:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:10,267 INFO L93 Difference]: Finished difference Result 161 states and 267 transitions. [2020-04-18 11:48:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2020-04-18 11:48:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:10,268 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:48:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:10,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 32 times [2020-04-18 11:48:10,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:10,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886251556] [2020-04-18 11:48:10,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:10,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886251556] [2020-04-18 11:48:10,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959736490] [2020-04-18 11:48:10,330 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:10,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:10,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:10,372 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:10,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:10,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:10,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:10,453 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:10,453 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:10,455 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:10,455 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:10,518 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:10,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:10,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=2621, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:10,520 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand 13 states. [2020-04-18 11:48:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:10,939 INFO L93 Difference]: Finished difference Result 173 states and 276 transitions. [2020-04-18 11:48:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 276 transitions. [2020-04-18 11:48:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:10,940 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:48:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:10,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 33 times [2020-04-18 11:48:10,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:10,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645840694] [2020-04-18 11:48:10,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:11,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645840694] [2020-04-18 11:48:11,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588970990] [2020-04-18 11:48:11,008 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:11,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:11,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:11,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:11,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:11,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:11,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:11,138 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:11,139 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:11,141 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-04-18 11:48:11,141 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:11,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:11,249 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:48:11,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 11:48:11,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2020-04-18 11:48:11,252 INFO L87 Difference]: Start difference. First operand 173 states and 276 transitions. Second operand 14 states. [2020-04-18 11:48:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:11,771 INFO L93 Difference]: Finished difference Result 184 states and 285 transitions. [2020-04-18 11:48:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 285 transitions. [2020-04-18 11:48:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:11,772 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:48:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 34 times [2020-04-18 11:48:11,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:11,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345929027] [2020-04-18 11:48:11,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:11,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345929027] [2020-04-18 11:48:11,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529203065] [2020-04-18 11:48:11,853 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:11,893 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:11,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:11,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 11:48:11,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:11,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:11,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:11,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 11:48:11,958 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:11,959 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:11,960 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 11:48:11,960 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:12,150 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:12,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 11:48:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=4356, Unknown=0, NotChecked=0, Total=5852 [2020-04-18 11:48:12,152 INFO L87 Difference]: Start difference. First operand 184 states and 285 transitions. Second operand 13 states. [2020-04-18 11:48:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:12,749 INFO L93 Difference]: Finished difference Result 193 states and 289 transitions. [2020-04-18 11:48:12,749 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2020-04-18 11:48:12,749 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:12,750 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [885749744] [2020-04-18 11:48:12,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:12,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 11:48:12,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [885749744] [2020-04-18 11:48:12,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-04-18 11:48:12,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:12,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-04-18 11:48:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5503, Unknown=0, NotChecked=0, Total=7310 [2020-04-18 11:48:12,754 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 49 states. [2020-04-18 11:48:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:13,846 INFO L93 Difference]: Finished difference Result 283 states and 666 transitions. [2020-04-18 11:48:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 11:48:13,847 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 12 [2020-04-18 11:48:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:13,850 INFO L225 Difference]: With dead ends: 283 [2020-04-18 11:48:13,850 INFO L226 Difference]: Without dead ends: 263 [2020-04-18 11:48:13,852 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 264 SyntacticMatches, 25 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2594, Invalid=7912, Unknown=0, NotChecked=0, Total=10506 [2020-04-18 11:48:13,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-18 11:48:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 136. [2020-04-18 11:48:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-18 11:48:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2020-04-18 11:48:13,859 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 12 [2020-04-18 11:48:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:13,859 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2020-04-18 11:48:13,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-04-18 11:48:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2020-04-18 11:48:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:13,860 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:13,860 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:15,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:15,873 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 9 times [2020-04-18 11:48:15,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:15,874 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [258608952] [2020-04-18 11:48:15,875 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:15,875 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 11:48:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 11:48:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 11:48:15,876 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 10 times [2020-04-18 11:48:15,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:15,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478132032] [2020-04-18 11:48:15,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:16,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478132032] [2020-04-18 11:48:16,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433791252] [2020-04-18 11:48:16,004 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:16,051 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:16,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:16,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:16,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:16,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:16,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:16,155 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:16,155 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:16,157 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 11:48:16,157 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:16,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:16,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:16,533 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 11:48:16,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:48:16,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-04-18 11:48:16,534 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 24 states. [2020-04-18 11:48:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:16,777 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2020-04-18 11:48:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-04-18 11:48:16,778 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:16,778 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [258608952] [2020-04-18 11:48:16,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:16,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:48:16,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [258608952] [2020-04-18 11:48:16,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 11:48:16,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:16,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 11:48:16,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:48:16,781 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand 24 states. [2020-04-18 11:48:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:16,930 INFO L93 Difference]: Finished difference Result 199 states and 487 transitions. [2020-04-18 11:48:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 11:48:16,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2020-04-18 11:48:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:48:16,933 INFO L225 Difference]: With dead ends: 199 [2020-04-18 11:48:16,933 INFO L226 Difference]: Without dead ends: 193 [2020-04-18 11:48:16,934 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:48:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-18 11:48:16,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2020-04-18 11:48:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-18 11:48:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 374 transitions. [2020-04-18 11:48:16,940 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 374 transitions. Word has length 12 [2020-04-18 11:48:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:48:16,940 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 374 transitions. [2020-04-18 11:48:16,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 11:48:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 374 transitions. [2020-04-18 11:48:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:16,941 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:48:16,941 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:48:17,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:17,145 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:48:17,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 35 times [2020-04-18 11:48:17,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:48:17,146 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1753408876] [2020-04-18 11:48:17,147 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:17,148 INFO L259 McrAutomatonBuilder]: Finished intersection with 72 states and 153 transitions. [2020-04-18 11:48:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-04-18 11:48:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:17,149 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:48:17,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:17,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 36 times [2020-04-18 11:48:17,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:17,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590412981] [2020-04-18 11:48:17,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:17,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590412981] [2020-04-18 11:48:17,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884463704] [2020-04-18 11:48:17,228 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:17,272 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:17,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:17,273 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:17,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:17,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:17,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:17,402 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:17,403 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:17,405 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 32 transitions. [2020-04-18 11:48:17,405 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:17,535 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:17,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:17,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:48:17,536 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 15 states. [2020-04-18 11:48:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:17,818 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2020-04-18 11:48:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 223 transitions. [2020-04-18 11:48:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:17,819 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:48:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:17,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 37 times [2020-04-18 11:48:17,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:17,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692200010] [2020-04-18 11:48:17,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:17,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692200010] [2020-04-18 11:48:17,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127062660] [2020-04-18 11:48:17,919 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:17,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:17,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:18,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:18,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:18,103 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:18,104 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:18,105 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:48:18,106 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:18,210 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:48:18,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:18,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-04-18 11:48:18,211 INFO L87 Difference]: Start difference. First operand 107 states and 223 transitions. Second operand 15 states. [2020-04-18 11:48:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:18,634 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2020-04-18 11:48:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 240 transitions. [2020-04-18 11:48:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:18,635 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:48:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:18,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 38 times [2020-04-18 11:48:18,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:18,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976456437] [2020-04-18 11:48:18,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:18,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976456437] [2020-04-18 11:48:18,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256636996] [2020-04-18 11:48:18,727 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:18,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:18,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:18,769 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:18,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:18,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:18,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:18,864 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:18,865 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:18,866 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:48:18,866 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:18,946 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:18,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2020-04-18 11:48:18,947 INFO L87 Difference]: Start difference. First operand 119 states and 240 transitions. Second operand 15 states. [2020-04-18 11:48:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:19,345 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 11:48:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 11:48:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:19,346 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:48:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 39 times [2020-04-18 11:48:19,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:19,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154177402] [2020-04-18 11:48:19,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:19,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154177402] [2020-04-18 11:48:19,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022110673] [2020-04-18 11:48:19,459 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:19,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:19,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:19,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:19,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:19,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:19,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:19,618 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:19,619 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:19,620 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:48:19,621 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:19,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:19,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:19,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:48:19,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:19,819 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:19,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 11:48:19,820 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 11:48:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:20,339 INFO L93 Difference]: Finished difference Result 151 states and 280 transitions. [2020-04-18 11:48:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 280 transitions. [2020-04-18 11:48:20,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:20,340 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:48:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 40 times [2020-04-18 11:48:20,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:20,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694840299] [2020-04-18 11:48:20,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:20,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694840299] [2020-04-18 11:48:20,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354703657] [2020-04-18 11:48:20,460 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:20,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:20,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:20,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:20,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:20,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:20,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:20,620 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:20,621 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:20,624 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:48:20,624 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:20,687 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:48:20,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:20,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 11:48:20,688 INFO L87 Difference]: Start difference. First operand 151 states and 280 transitions. Second operand 15 states. [2020-04-18 11:48:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:21,035 INFO L93 Difference]: Finished difference Result 173 states and 321 transitions. [2020-04-18 11:48:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 321 transitions. [2020-04-18 11:48:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:21,036 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:48:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:21,036 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 41 times [2020-04-18 11:48:21,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:21,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380611249] [2020-04-18 11:48:21,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:21,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380611249] [2020-04-18 11:48:21,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642701376] [2020-04-18 11:48:21,164 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:21,233 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:21,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:21,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:21,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:29,781 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 11:48:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:29,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:29,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-18 11:48:29,783 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:29,784 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:29,785 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:48:29,786 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:36,097 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:36,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:36,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 11:48:36,098 INFO L87 Difference]: Start difference. First operand 173 states and 321 transitions. Second operand 15 states. [2020-04-18 11:48:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:36,532 INFO L93 Difference]: Finished difference Result 181 states and 330 transitions. [2020-04-18 11:48:36,532 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 330 transitions. [2020-04-18 11:48:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:36,533 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:48:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:36,534 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 42 times [2020-04-18 11:48:36,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:36,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191075754] [2020-04-18 11:48:36,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:36,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191075754] [2020-04-18 11:48:36,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400767856] [2020-04-18 11:48:36,622 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:36,665 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:36,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:36,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:36,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:36,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:36,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:36,778 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:36,779 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:36,781 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:48:36,781 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:36,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:36,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:36,900 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:48:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:36,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=1964, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 11:48:36,901 INFO L87 Difference]: Start difference. First operand 181 states and 330 transitions. Second operand 17 states. [2020-04-18 11:48:37,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:37,754 INFO L93 Difference]: Finished difference Result 204 states and 364 transitions. [2020-04-18 11:48:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 364 transitions. [2020-04-18 11:48:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:37,755 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:48:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:37,755 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 43 times [2020-04-18 11:48:37,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:37,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822872279] [2020-04-18 11:48:37,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:37,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822872279] [2020-04-18 11:48:37,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480613737] [2020-04-18 11:48:37,875 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:37,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:37,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:38,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:38,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:38,055 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:38,056 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:38,059 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:48:38,059 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:38,140 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:48:38,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:38,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=2498, Unknown=0, NotChecked=0, Total=3306 [2020-04-18 11:48:38,141 INFO L87 Difference]: Start difference. First operand 204 states and 364 transitions. Second operand 15 states. [2020-04-18 11:48:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:38,501 INFO L93 Difference]: Finished difference Result 213 states and 378 transitions. [2020-04-18 11:48:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 378 transitions. [2020-04-18 11:48:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:38,501 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:48:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 44 times [2020-04-18 11:48:38,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:38,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917199997] [2020-04-18 11:48:38,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:38,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917199997] [2020-04-18 11:48:38,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722271229] [2020-04-18 11:48:38,588 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:38,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:38,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:38,629 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:38,630 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:38,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:38,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:38,776 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:38,777 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:38,779 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:48:38,779 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:38,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:38,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:38,915 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:48:38,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:48:38,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 11:48:38,916 INFO L87 Difference]: Start difference. First operand 213 states and 378 transitions. Second operand 17 states. [2020-04-18 11:48:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:39,657 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2020-04-18 11:48:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 400 transitions. [2020-04-18 11:48:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:39,658 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:48:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 45 times [2020-04-18 11:48:39,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:39,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386258329] [2020-04-18 11:48:39,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:39,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386258329] [2020-04-18 11:48:39,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30405990] [2020-04-18 11:48:39,767 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:39,810 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:48:39,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:39,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:39,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:39,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:39,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:39,920 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:39,921 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:39,924 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 43 transitions. [2020-04-18 11:48:39,924 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:39,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:39,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:40,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:40,109 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 11:48:40,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:48:40,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 11:48:40,111 INFO L87 Difference]: Start difference. First operand 231 states and 400 transitions. Second operand 18 states. [2020-04-18 11:48:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:40,704 INFO L93 Difference]: Finished difference Result 265 states and 451 transitions. [2020-04-18 11:48:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 451 transitions. [2020-04-18 11:48:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:40,705 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:48:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:40,706 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 46 times [2020-04-18 11:48:40,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:40,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909442893] [2020-04-18 11:48:40,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:40,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909442893] [2020-04-18 11:48:40,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482179961] [2020-04-18 11:48:40,802 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:40,844 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:40,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:40,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:40,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:43,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:43,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:43,066 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:43,066 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:43,068 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 11:48:43,068 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:43,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:43,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:43,332 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 11:48:43,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:43,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1325, Invalid=4077, Unknown=0, NotChecked=0, Total=5402 [2020-04-18 11:48:43,333 INFO L87 Difference]: Start difference. First operand 265 states and 451 transitions. Second operand 16 states. [2020-04-18 11:48:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:44,347 INFO L93 Difference]: Finished difference Result 283 states and 476 transitions. [2020-04-18 11:48:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 476 transitions. [2020-04-18 11:48:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:44,348 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:48:44,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 47 times [2020-04-18 11:48:44,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:44,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66079212] [2020-04-18 11:48:44,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:44,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66079212] [2020-04-18 11:48:44,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116255194] [2020-04-18 11:48:44,432 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:44,472 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:44,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:44,473 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:44,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:44,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:44,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:44,580 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:44,580 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:44,582 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:48:44,582 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:44,685 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1670, Invalid=5136, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 11:48:44,686 INFO L87 Difference]: Start difference. First operand 283 states and 476 transitions. Second operand 15 states. [2020-04-18 11:48:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:45,571 INFO L93 Difference]: Finished difference Result 299 states and 494 transitions. [2020-04-18 11:48:45,571 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 494 transitions. [2020-04-18 11:48:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:45,572 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:48:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:45,572 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 48 times [2020-04-18 11:48:45,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:45,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373392319] [2020-04-18 11:48:45,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:45,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373392319] [2020-04-18 11:48:45,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734388043] [2020-04-18 11:48:45,652 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:45,699 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:45,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:45,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:45,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:45,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:45,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:45,815 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:45,816 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:45,817 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:48:45,817 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:45,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:46,034 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:48:46,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2167, Invalid=6575, Unknown=0, NotChecked=0, Total=8742 [2020-04-18 11:48:46,035 INFO L87 Difference]: Start difference. First operand 299 states and 494 transitions. Second operand 16 states. [2020-04-18 11:48:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:46,908 INFO L93 Difference]: Finished difference Result 308 states and 503 transitions. [2020-04-18 11:48:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 503 transitions. [2020-04-18 11:48:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:46,909 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:48:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 49 times [2020-04-18 11:48:46,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:46,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881189111] [2020-04-18 11:48:46,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:47,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881189111] [2020-04-18 11:48:47,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455012763] [2020-04-18 11:48:47,011 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:47,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:47,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:47,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:47,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:47,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:47,162 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:47,163 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:47,165 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:48:47,165 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:47,431 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:48:47,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:47,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=8559, Unknown=0, NotChecked=0, Total=11342 [2020-04-18 11:48:47,433 INFO L87 Difference]: Start difference. First operand 308 states and 503 transitions. Second operand 15 states. [2020-04-18 11:48:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:48,671 INFO L93 Difference]: Finished difference Result 330 states and 529 transitions. [2020-04-18 11:48:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 529 transitions. [2020-04-18 11:48:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:48,672 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:48:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 50 times [2020-04-18 11:48:48,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:48,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210810538] [2020-04-18 11:48:48,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:48,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210810538] [2020-04-18 11:48:48,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536430974] [2020-04-18 11:48:48,770 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:48,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:48:48,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:48,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:48,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:48,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:48,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:48,933 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:48,934 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:48,935 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:48,935 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:49,013 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:49,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:49,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3506, Invalid=11256, Unknown=0, NotChecked=0, Total=14762 [2020-04-18 11:48:49,015 INFO L87 Difference]: Start difference. First operand 330 states and 529 transitions. Second operand 15 states. [2020-04-18 11:48:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:49,383 INFO L93 Difference]: Finished difference Result 341 states and 536 transitions. [2020-04-18 11:48:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2020-04-18 11:48:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:49,383 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 11:48:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:49,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 51 times [2020-04-18 11:48:49,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:49,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406384104] [2020-04-18 11:48:49,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:49,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406384104] [2020-04-18 11:48:49,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818777259] [2020-04-18 11:48:49,457 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:49,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:48:49,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:49,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:49,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:49,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:49,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:49,635 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:49,636 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:49,638 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:49,638 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:49,834 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:49,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:49,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3693, Invalid=12057, Unknown=0, NotChecked=0, Total=15750 [2020-04-18 11:48:49,835 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand 15 states. [2020-04-18 11:48:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:50,491 INFO L93 Difference]: Finished difference Result 353 states and 545 transitions. [2020-04-18 11:48:50,491 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 545 transitions. [2020-04-18 11:48:50,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:50,492 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 11:48:50,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 52 times [2020-04-18 11:48:50,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:50,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840099885] [2020-04-18 11:48:50,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:50,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840099885] [2020-04-18 11:48:50,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281262101] [2020-04-18 11:48:50,589 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:50,630 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:48:50,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:50,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:50,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:50,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:50,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:50,734 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:50,735 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:50,736 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:48:50,736 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:50,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:50,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:50,930 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:48:50,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:48:50,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=13681, Unknown=0, NotChecked=0, Total=17822 [2020-04-18 11:48:50,931 INFO L87 Difference]: Start difference. First operand 353 states and 545 transitions. Second operand 16 states. [2020-04-18 11:48:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:51,760 INFO L93 Difference]: Finished difference Result 365 states and 551 transitions. [2020-04-18 11:48:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 551 transitions. [2020-04-18 11:48:51,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:51,761 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 11:48:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 53 times [2020-04-18 11:48:51,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:51,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885794275] [2020-04-18 11:48:51,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:51,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885794275] [2020-04-18 11:48:51,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143050662] [2020-04-18 11:48:51,873 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:51,941 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:48:51,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:51,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:51,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:52,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:52,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:52,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:52,135 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:52,137 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:52,139 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:52,139 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:54,343 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:54,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:54,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4914, Invalid=16545, Unknown=3, NotChecked=0, Total=21462 [2020-04-18 11:48:54,344 INFO L87 Difference]: Start difference. First operand 365 states and 551 transitions. Second operand 15 states. [2020-04-18 11:48:55,485 WARN L192 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 11:48:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:57,339 INFO L93 Difference]: Finished difference Result 386 states and 564 transitions. [2020-04-18 11:48:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 564 transitions. [2020-04-18 11:48:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:48:57,340 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 11:48:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:48:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 54 times [2020-04-18 11:48:57,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:48:57,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492889606] [2020-04-18 11:48:57,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:48:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:48:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:57,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492889606] [2020-04-18 11:48:57,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92783610] [2020-04-18 11:48:57,429 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:48:57,470 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 11:48:57,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:48:57,470 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:48:57,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:48:57,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:48:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:48:57,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:48:57,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:48:57,552 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:48:57,553 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:48:57,555 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:48:57,555 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:48:57,932 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:48:57,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:48:57,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6135, Invalid=21583, Unknown=4, NotChecked=0, Total=27722 [2020-04-18 11:48:57,934 INFO L87 Difference]: Start difference. First operand 386 states and 564 transitions. Second operand 15 states. [2020-04-18 11:48:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:48:59,044 INFO L93 Difference]: Finished difference Result 401 states and 577 transitions. [2020-04-18 11:48:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 577 transitions. [2020-04-18 11:48:59,045 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:48:59,046 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1753408876] [2020-04-18 11:48:59,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:48:59,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:48:59,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1753408876] [2020-04-18 11:48:59,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-04-18 11:48:59,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:48:59,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-04-18 11:48:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6933, Invalid=24925, Unknown=4, NotChecked=0, Total=31862 [2020-04-18 11:48:59,049 INFO L87 Difference]: Start difference. First operand 146 states and 374 transitions. Second operand 88 states. [2020-04-18 11:49:03,977 WARN L192 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2020-04-18 11:49:08,536 WARN L192 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-04-18 11:49:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:11,360 INFO L93 Difference]: Finished difference Result 504 states and 1177 transitions. [2020-04-18 11:49:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-04-18 11:49:11,361 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 13 [2020-04-18 11:49:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:11,363 INFO L225 Difference]: With dead ends: 504 [2020-04-18 11:49:11,364 INFO L226 Difference]: Without dead ends: 456 [2020-04-18 11:49:11,365 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 574 SyntacticMatches, 75 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32383 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=12876, Invalid=47879, Unknown=7, NotChecked=0, Total=60762 [2020-04-18 11:49:11,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-04-18 11:49:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 172. [2020-04-18 11:49:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-18 11:49:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 470 transitions. [2020-04-18 11:49:11,374 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 470 transitions. Word has length 13 [2020-04-18 11:49:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:11,374 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 470 transitions. [2020-04-18 11:49:11,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-04-18 11:49:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 470 transitions. [2020-04-18 11:49:11,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:11,375 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:11,375 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:15,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:15,185 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:49:15,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:15,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 55 times [2020-04-18 11:49:15,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:15,186 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1761268389] [2020-04-18 11:49:15,187 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:15,187 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 149 transitions. [2020-04-18 11:49:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 11:49:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:15,188 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:15,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148993, now seen corresponding path program 56 times [2020-04-18 11:49:15,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:15,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185516670] [2020-04-18 11:49:15,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:15,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185516670] [2020-04-18 11:49:15,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526942646] [2020-04-18 11:49:15,271 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:15,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:15,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:15,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:15,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:15,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:15,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:15,428 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:15,429 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:15,431 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 11:49:15,431 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:15,590 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:49:15,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:15,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-18 11:49:15,591 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 15 states. [2020-04-18 11:49:15,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:15,909 INFO L93 Difference]: Finished difference Result 106 states and 221 transitions. [2020-04-18 11:49:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2020-04-18 11:49:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:15,910 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:49:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 57 times [2020-04-18 11:49:15,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:15,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442719883] [2020-04-18 11:49:15,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:16,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442719883] [2020-04-18 11:49:16,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280035205] [2020-04-18 11:49:16,018 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:16,064 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 11:49:16,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:16,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:16,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:16,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:16,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:16,170 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:16,171 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:16,172 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:49:16,172 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:16,287 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:16,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2020-04-18 11:49:16,288 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand 15 states. [2020-04-18 11:49:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:16,701 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2020-04-18 11:49:16,701 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 239 transitions. [2020-04-18 11:49:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:16,702 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:49:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:16,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 58 times [2020-04-18 11:49:16,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:16,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373387385] [2020-04-18 11:49:16,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:16,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373387385] [2020-04-18 11:49:16,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712016176] [2020-04-18 11:49:16,825 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:16,886 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:16,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:16,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:16,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:17,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:17,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:17,101 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:17,102 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:17,104 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 11:49:17,104 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:17,260 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:17,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:17,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 11:49:17,261 INFO L87 Difference]: Start difference. First operand 117 states and 239 transitions. Second operand 15 states. [2020-04-18 11:49:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:17,770 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 11:49:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 11:49:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:17,771 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:49:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 59 times [2020-04-18 11:49:17,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:17,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936788411] [2020-04-18 11:49:17,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:17,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936788411] [2020-04-18 11:49:17,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368888011] [2020-04-18 11:49:17,896 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:17,967 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:49:17,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:17,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:17,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:18,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:18,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:18,170 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:18,172 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:18,175 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:49:18,176 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:18,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:18,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:18,512 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:18,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:18,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=1708, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 11:49:18,513 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 11:49:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:19,209 INFO L93 Difference]: Finished difference Result 156 states and 295 transitions. [2020-04-18 11:49:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 295 transitions. [2020-04-18 11:49:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:19,210 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:49:19,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:19,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 60 times [2020-04-18 11:49:19,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:19,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480165598] [2020-04-18 11:49:19,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:19,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480165598] [2020-04-18 11:49:19,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861637526] [2020-04-18 11:49:19,303 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:19,344 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:19,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:19,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:19,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:19,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:19,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:19,456 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:19,456 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:19,458 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 11:49:19,458 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:19,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:19,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:19,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:19,584 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:19,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:19,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=2478, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 11:49:19,585 INFO L87 Difference]: Start difference. First operand 156 states and 295 transitions. Second operand 17 states. [2020-04-18 11:49:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:20,216 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2020-04-18 11:49:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 302 transitions. [2020-04-18 11:49:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:20,217 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:49:20,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:20,217 INFO L82 PathProgramCache]: Analyzing trace with hash 9426703, now seen corresponding path program 61 times [2020-04-18 11:49:20,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:20,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106934197] [2020-04-18 11:49:20,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:20,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106934197] [2020-04-18 11:49:20,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640875667] [2020-04-18 11:49:20,311 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:20,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:20,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:20,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:20,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:20,499 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:20,500 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:20,503 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:20,503 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:20,574 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:20,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3064, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 11:49:20,575 INFO L87 Difference]: Start difference. First operand 164 states and 302 transitions. Second operand 15 states. [2020-04-18 11:49:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:20,920 INFO L93 Difference]: Finished difference Result 182 states and 332 transitions. [2020-04-18 11:49:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 332 transitions. [2020-04-18 11:49:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:20,921 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:49:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 62 times [2020-04-18 11:49:20,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:20,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832327239] [2020-04-18 11:49:20,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:21,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832327239] [2020-04-18 11:49:21,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105146663] [2020-04-18 11:49:21,000 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:21,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:21,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:21,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:21,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:21,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:21,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:21,147 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:21,148 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:21,149 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:21,149 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:21,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:21,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:21,245 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:21,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:21,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 11:49:21,246 INFO L87 Difference]: Start difference. First operand 182 states and 332 transitions. Second operand 17 states. [2020-04-18 11:49:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:21,890 INFO L93 Difference]: Finished difference Result 201 states and 361 transitions. [2020-04-18 11:49:21,890 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 361 transitions. [2020-04-18 11:49:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:21,891 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:49:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:21,891 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 63 times [2020-04-18 11:49:21,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:21,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433756922] [2020-04-18 11:49:21,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:21,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433756922] [2020-04-18 11:49:21,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853700283] [2020-04-18 11:49:21,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:22,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:22,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:22,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:22,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:22,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:22,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:22,136 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:22,137 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:22,139 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:49:22,139 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:22,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:22,283 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:49:22,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:22,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=3978, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 11:49:22,284 INFO L87 Difference]: Start difference. First operand 201 states and 361 transitions. Second operand 19 states. [2020-04-18 11:49:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:23,443 INFO L93 Difference]: Finished difference Result 237 states and 410 transitions. [2020-04-18 11:49:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 410 transitions. [2020-04-18 11:49:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:23,444 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:49:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:23,444 INFO L82 PathProgramCache]: Analyzing trace with hash 646656193, now seen corresponding path program 64 times [2020-04-18 11:49:23,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:23,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710930932] [2020-04-18 11:49:23,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:23,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710930932] [2020-04-18 11:49:23,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921238631] [2020-04-18 11:49:23,528 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:23,569 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:23,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:23,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:23,571 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:23,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:23,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:23,683 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:23,684 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:23,686 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 39 transitions. [2020-04-18 11:49:23,686 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:23,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:23,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:23,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:23,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:23,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:23,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:23,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:24,001 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 11:49:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:49:24,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=5905, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 11:49:24,002 INFO L87 Difference]: Start difference. First operand 237 states and 410 transitions. Second operand 20 states. [2020-04-18 11:49:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:24,706 INFO L93 Difference]: Finished difference Result 268 states and 455 transitions. [2020-04-18 11:49:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 455 transitions. [2020-04-18 11:49:24,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:24,707 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:49:24,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:24,707 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 65 times [2020-04-18 11:49:24,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:24,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850991727] [2020-04-18 11:49:24,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:24,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850991727] [2020-04-18 11:49:24,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496280523] [2020-04-18 11:49:24,807 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:24,850 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:24,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:24,852 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:24,854 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:24,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:24,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:24,962 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:24,963 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:24,964 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:24,964 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:25,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:25,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:25,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:25,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:25,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:25,217 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 11:49:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:49:25,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=7200, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 11:49:25,218 INFO L87 Difference]: Start difference. First operand 268 states and 455 transitions. Second operand 18 states. [2020-04-18 11:49:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:26,145 INFO L93 Difference]: Finished difference Result 284 states and 475 transitions. [2020-04-18 11:49:26,145 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 475 transitions. [2020-04-18 11:49:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:26,146 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:49:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 66 times [2020-04-18 11:49:26,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:26,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069552460] [2020-04-18 11:49:26,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:26,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069552460] [2020-04-18 11:49:26,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691242316] [2020-04-18 11:49:26,259 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:26,303 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:26,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:26,304 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:26,305 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:26,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:26,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:26,416 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:26,417 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:26,418 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:49:26,418 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:26,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:26,684 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:49:26,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:26,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=8955, Unknown=0, NotChecked=0, Total=11556 [2020-04-18 11:49:26,685 INFO L87 Difference]: Start difference. First operand 284 states and 475 transitions. Second operand 16 states. [2020-04-18 11:49:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:27,657 INFO L93 Difference]: Finished difference Result 303 states and 492 transitions. [2020-04-18 11:49:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 492 transitions. [2020-04-18 11:49:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:27,658 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:49:27,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:27,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 67 times [2020-04-18 11:49:27,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:27,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961219909] [2020-04-18 11:49:27,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:27,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961219909] [2020-04-18 11:49:27,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650502127] [2020-04-18 11:49:27,738 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:27,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:27,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:27,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:27,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:27,905 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:27,905 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:27,907 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 11:49:27,907 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:27,997 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 11:49:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:49:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3020, Invalid=10552, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 11:49:27,999 INFO L87 Difference]: Start difference. First operand 303 states and 492 transitions. Second operand 15 states. [2020-04-18 11:49:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:28,797 INFO L93 Difference]: Finished difference Result 326 states and 515 transitions. [2020-04-18 11:49:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 515 transitions. [2020-04-18 11:49:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:28,798 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:49:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 68 times [2020-04-18 11:49:28,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:28,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679600245] [2020-04-18 11:49:28,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:28,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679600245] [2020-04-18 11:49:28,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803247849] [2020-04-18 11:49:28,866 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:28,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:28,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:28,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:28,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:29,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:29,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:29,009 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:29,010 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:29,012 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:49:29,012 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:29,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:29,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:29,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:29,176 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 11:49:29,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:29,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3356, Invalid=11896, Unknown=0, NotChecked=0, Total=15252 [2020-04-18 11:49:29,177 INFO L87 Difference]: Start difference. First operand 326 states and 515 transitions. Second operand 17 states. [2020-04-18 11:49:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:30,243 INFO L93 Difference]: Finished difference Result 350 states and 530 transitions. [2020-04-18 11:49:30,243 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2020-04-18 11:49:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:30,244 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:49:30,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:30,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 69 times [2020-04-18 11:49:30,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:30,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546471420] [2020-04-18 11:49:30,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:30,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546471420] [2020-04-18 11:49:30,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278547566] [2020-04-18 11:49:30,313 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:30,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:30,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:30,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:30,358 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:30,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:30,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:30,478 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:30,479 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:30,480 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 11:49:30,480 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:30,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:30,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:30,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:30,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:30,746 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 11:49:30,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:49:30,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3866, Invalid=14224, Unknown=0, NotChecked=0, Total=18090 [2020-04-18 11:49:30,747 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand 18 states. [2020-04-18 11:49:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:31,986 INFO L93 Difference]: Finished difference Result 358 states and 536 transitions. [2020-04-18 11:49:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 536 transitions. [2020-04-18 11:49:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:31,987 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:49:31,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 70 times [2020-04-18 11:49:31,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:31,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781766017] [2020-04-18 11:49:31,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:32,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781766017] [2020-04-18 11:49:32,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817014413] [2020-04-18 11:49:32,100 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:32,167 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:32,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:32,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 11:49:32,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:32,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:32,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 11:49:32,319 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:32,320 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:32,323 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 11:49:32,324 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:32,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:32,654 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 11:49:32,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 11:49:32,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4526, Invalid=16644, Unknown=0, NotChecked=0, Total=21170 [2020-04-18 11:49:32,656 INFO L87 Difference]: Start difference. First operand 358 states and 536 transitions. Second operand 16 states. [2020-04-18 11:49:33,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:33,892 INFO L93 Difference]: Finished difference Result 359 states and 536 transitions. [2020-04-18 11:49:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 536 transitions. [2020-04-18 11:49:33,893 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:33,894 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1761268389] [2020-04-18 11:49:33,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:33,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 11:49:33,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1761268389] [2020-04-18 11:49:33,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-04-18 11:49:33,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-04-18 11:49:33,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4967, Invalid=18289, Unknown=0, NotChecked=0, Total=23256 [2020-04-18 11:49:33,896 INFO L87 Difference]: Start difference. First operand 172 states and 470 transitions. Second operand 80 states. [2020-04-18 11:49:37,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:37,390 INFO L93 Difference]: Finished difference Result 380 states and 911 transitions. [2020-04-18 11:49:37,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-04-18 11:49:37,391 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 13 [2020-04-18 11:49:37,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:37,393 INFO L225 Difference]: With dead ends: 380 [2020-04-18 11:49:37,393 INFO L226 Difference]: Without dead ends: 362 [2020-04-18 11:49:37,396 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 424 SyntacticMatches, 61 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20813 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=8391, Invalid=29439, Unknown=0, NotChecked=0, Total=37830 [2020-04-18 11:49:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-04-18 11:49:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 177. [2020-04-18 11:49:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-04-18 11:49:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2020-04-18 11:49:37,403 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 13 [2020-04-18 11:49:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:37,403 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2020-04-18 11:49:37,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-04-18 11:49:37,403 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2020-04-18 11:49:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:37,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:37,404 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:40,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:40,421 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:49:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:40,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 11 times [2020-04-18 11:49:40,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:40,422 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [875741369] [2020-04-18 11:49:40,422 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:40,423 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 41 transitions. [2020-04-18 11:49:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-04-18 11:49:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 11:49:40,423 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:40,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 12 times [2020-04-18 11:49:40,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:40,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272519496] [2020-04-18 11:49:40,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:40,597 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 11:49:40,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272519496] [2020-04-18 11:49:40,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175736456] [2020-04-18 11:49:40,598 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:40,643 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 11:49:40,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:40,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:40,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:40,788 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 11:49:40,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:40,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:40,788 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:40,789 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:40,790 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 11:49:40,791 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:40,868 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:40,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:40,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:40,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:40,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:40,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:40,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:40,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:41,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:41,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:41,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:41,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:41,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:41,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:41,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:41,341 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 11:49:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:49:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-04-18 11:49:41,342 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 28 states. [2020-04-18 11:49:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:41,701 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2020-04-18 11:49:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2020-04-18 11:49:41,702 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 11:49:41,702 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [875741369] [2020-04-18 11:49:41,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 11:49:41,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 11:49:41,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [875741369] [2020-04-18 11:49:41,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 11:49:41,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 11:49:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 11:49:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 11:49:41,704 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 28 states. [2020-04-18 11:49:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:41,878 INFO L93 Difference]: Finished difference Result 263 states and 661 transitions. [2020-04-18 11:49:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 11:49:41,878 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 13 [2020-04-18 11:49:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 11:49:41,881 INFO L225 Difference]: With dead ends: 263 [2020-04-18 11:49:41,881 INFO L226 Difference]: Without dead ends: 257 [2020-04-18 11:49:41,882 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 11:49:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-04-18 11:49:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 187. [2020-04-18 11:49:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-04-18 11:49:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 496 transitions. [2020-04-18 11:49:41,888 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 496 transitions. Word has length 13 [2020-04-18 11:49:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 11:49:41,888 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 496 transitions. [2020-04-18 11:49:41,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 11:49:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 496 transitions. [2020-04-18 11:49:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:41,889 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 11:49:41,889 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 11:49:42,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:42,092 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 11:49:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 71 times [2020-04-18 11:49:42,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 11:49:42,094 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1332641889] [2020-04-18 11:49:42,095 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:42,095 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 186 transitions. [2020-04-18 11:49:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 11:49:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:42,096 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 11:49:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 72 times [2020-04-18 11:49:42,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:42,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049199554] [2020-04-18 11:49:42,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:42,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049199554] [2020-04-18 11:49:42,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714039172] [2020-04-18 11:49:42,191 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:42,233 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:42,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:42,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:42,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:42,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:42,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:42,394 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:42,395 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:42,398 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 11:49:42,398 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:42,611 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:49:42,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:42,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-18 11:49:42,611 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 17 states. [2020-04-18 11:49:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:43,003 INFO L93 Difference]: Finished difference Result 130 states and 277 transitions. [2020-04-18 11:49:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 277 transitions. [2020-04-18 11:49:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:43,004 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 11:49:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:43,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 73 times [2020-04-18 11:49:43,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:43,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879503505] [2020-04-18 11:49:43,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:43,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879503505] [2020-04-18 11:49:43,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038115713] [2020-04-18 11:49:43,103 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:43,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:43,144 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:45,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:45,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:45,877 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:45,878 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:45,880 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 11:49:45,880 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:46,003 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:46,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:46,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2020-04-18 11:49:46,003 INFO L87 Difference]: Start difference. First operand 130 states and 277 transitions. Second operand 17 states. [2020-04-18 11:49:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:47,006 INFO L93 Difference]: Finished difference Result 146 states and 302 transitions. [2020-04-18 11:49:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 302 transitions. [2020-04-18 11:49:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:47,007 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 11:49:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 74 times [2020-04-18 11:49:47,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:47,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449416073] [2020-04-18 11:49:47,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:47,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449416073] [2020-04-18 11:49:47,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415773580] [2020-04-18 11:49:47,125 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:47,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:49:47,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:47,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:47,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:47,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:47,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:47,371 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:47,372 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:47,374 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 11:49:47,374 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:47,605 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 11:49:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:47,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=846, Unknown=1, NotChecked=0, Total=1260 [2020-04-18 11:49:47,606 INFO L87 Difference]: Start difference. First operand 146 states and 302 transitions. Second operand 17 states. [2020-04-18 11:49:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:48,385 INFO L93 Difference]: Finished difference Result 156 states and 315 transitions. [2020-04-18 11:49:48,386 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 315 transitions. [2020-04-18 11:49:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:48,386 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 11:49:48,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:48,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 75 times [2020-04-18 11:49:48,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:48,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100151994] [2020-04-18 11:49:48,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:48,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100151994] [2020-04-18 11:49:48,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273176203] [2020-04-18 11:49:48,484 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:48,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:49:48,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:48,529 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:48,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:48,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:48,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:48,667 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:48,667 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:48,669 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 11:49:48,669 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:51,193 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:49:51,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:51,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=1498, Unknown=3, NotChecked=0, Total=2162 [2020-04-18 11:49:51,194 INFO L87 Difference]: Start difference. First operand 156 states and 315 transitions. Second operand 17 states. [2020-04-18 11:49:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:52,998 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2020-04-18 11:49:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 330 transitions. [2020-04-18 11:49:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:52,999 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 11:49:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 76 times [2020-04-18 11:49:53,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:53,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535803698] [2020-04-18 11:49:53,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:53,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535803698] [2020-04-18 11:49:53,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829128390] [2020-04-18 11:49:53,099 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:53,140 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:49:53,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:53,141 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:53,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:53,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:53,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:53,278 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:53,278 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:53,280 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 11:49:53,280 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:53,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:53,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:54,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:49:54,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:49:54,131 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:49:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:49:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1118, Invalid=3036, Unknown=6, NotChecked=0, Total=4160 [2020-04-18 11:49:54,132 INFO L87 Difference]: Start difference. First operand 169 states and 330 transitions. Second operand 19 states. [2020-04-18 11:49:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:55,374 INFO L93 Difference]: Finished difference Result 207 states and 383 transitions. [2020-04-18 11:49:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 383 transitions. [2020-04-18 11:49:55,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:55,375 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 11:49:55,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 77 times [2020-04-18 11:49:55,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:55,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991981355] [2020-04-18 11:49:55,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:55,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991981355] [2020-04-18 11:49:55,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553085935] [2020-04-18 11:49:55,491 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:55,536 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:49:55,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:55,537 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:55,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:49:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:55,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:49:55,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:49:55,679 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:49:55,680 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:49:55,682 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 11:49:55,683 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:49:55,756 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 14 times. [2020-04-18 11:49:55,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:49:55,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=3959, Unknown=6, NotChecked=0, Total=5402 [2020-04-18 11:49:55,757 INFO L87 Difference]: Start difference. First operand 207 states and 383 transitions. Second operand 17 states. [2020-04-18 11:49:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:49:56,190 INFO L93 Difference]: Finished difference Result 238 states and 445 transitions. [2020-04-18 11:49:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 445 transitions. [2020-04-18 11:49:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:49:56,190 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 11:49:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:49:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 78 times [2020-04-18 11:49:56,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:49:56,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198449541] [2020-04-18 11:49:56,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:49:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:49:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:49:56,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198449541] [2020-04-18 11:49:56,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069435520] [2020-04-18 11:49:56,299 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:49:56,342 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:49:56,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:49:56,343 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:49:56,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:00,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:00,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:00,542 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:00,543 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:00,545 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:50:00,545 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:00,624 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:50:00,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:00,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=3959, Unknown=6, NotChecked=0, Total=5402 [2020-04-18 11:50:00,624 INFO L87 Difference]: Start difference. First operand 238 states and 445 transitions. Second operand 17 states. [2020-04-18 11:50:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:01,154 INFO L93 Difference]: Finished difference Result 250 states and 462 transitions. [2020-04-18 11:50:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 462 transitions. [2020-04-18 11:50:01,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:01,155 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 11:50:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:01,155 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 79 times [2020-04-18 11:50:01,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:01,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615634869] [2020-04-18 11:50:01,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:01,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615634869] [2020-04-18 11:50:01,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763392714] [2020-04-18 11:50:01,261 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:01,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:01,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:03,091 WARN L192 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-18 11:50:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:03,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:03,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:50:03,092 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:03,093 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:03,096 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 11:50:03,096 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:10,972 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:10,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:50:10,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=4044, Unknown=16, NotChecked=0, Total=5550 [2020-04-18 11:50:10,973 INFO L87 Difference]: Start difference. First operand 250 states and 462 transitions. Second operand 18 states. [2020-04-18 11:50:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:13,258 INFO L93 Difference]: Finished difference Result 259 states and 471 transitions. [2020-04-18 11:50:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 471 transitions. [2020-04-18 11:50:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:13,259 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 11:50:13,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:13,260 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 80 times [2020-04-18 11:50:13,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:13,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985365919] [2020-04-18 11:50:13,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:13,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985365919] [2020-04-18 11:50:13,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990205840] [2020-04-18 11:50:13,357 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:13,403 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:13,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:13,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:13,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:13,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:13,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:13,536 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:13,537 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:13,538 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 11:50:13,538 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:13,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:13,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:13,633 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:13,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:13,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1622, Invalid=4524, Unknown=16, NotChecked=0, Total=6162 [2020-04-18 11:50:13,634 INFO L87 Difference]: Start difference. First operand 259 states and 471 transitions. Second operand 19 states. [2020-04-18 11:50:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:14,765 INFO L93 Difference]: Finished difference Result 295 states and 529 transitions. [2020-04-18 11:50:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 529 transitions. [2020-04-18 11:50:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:14,766 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 11:50:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:14,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 81 times [2020-04-18 11:50:14,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:14,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088447912] [2020-04-18 11:50:14,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:14,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088447912] [2020-04-18 11:50:14,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479874698] [2020-04-18 11:50:14,899 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:14,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:50:14,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:14,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:14,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:15,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:15,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:15,106 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:15,107 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:15,109 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2020-04-18 11:50:15,109 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:15,211 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 18 times. [2020-04-18 11:50:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1808, Invalid=5486, Unknown=16, NotChecked=0, Total=7310 [2020-04-18 11:50:15,211 INFO L87 Difference]: Start difference. First operand 295 states and 529 transitions. Second operand 17 states. [2020-04-18 11:50:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:15,677 INFO L93 Difference]: Finished difference Result 309 states and 554 transitions. [2020-04-18 11:50:15,677 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 554 transitions. [2020-04-18 11:50:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:15,678 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 11:50:15,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 82 times [2020-04-18 11:50:15,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:15,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593786901] [2020-04-18 11:50:15,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:15,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593786901] [2020-04-18 11:50:15,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541444997] [2020-04-18 11:50:15,772 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:15,810 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:15,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:15,811 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:15,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:16,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:16,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:16,332 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:16,333 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:16,335 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:50:16,335 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:16,398 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:50:16,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1808, Invalid=5486, Unknown=16, NotChecked=0, Total=7310 [2020-04-18 11:50:16,399 INFO L87 Difference]: Start difference. First operand 309 states and 554 transitions. Second operand 17 states. [2020-04-18 11:50:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:16,964 INFO L93 Difference]: Finished difference Result 317 states and 563 transitions. [2020-04-18 11:50:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 563 transitions. [2020-04-18 11:50:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:16,964 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 11:50:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 83 times [2020-04-18 11:50:16,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:16,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095882700] [2020-04-18 11:50:16,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:17,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095882700] [2020-04-18 11:50:17,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892180119] [2020-04-18 11:50:17,050 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:17,092 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:50:17,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:17,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:17,094 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:24,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:24,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:24,914 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:24,915 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:24,917 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 11:50:24,917 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:24,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:25,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:25,130 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 11:50:25,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:25,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1874, Invalid=5766, Unknown=16, NotChecked=0, Total=7656 [2020-04-18 11:50:25,131 INFO L87 Difference]: Start difference. First operand 317 states and 563 transitions. Second operand 19 states. [2020-04-18 11:50:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:26,409 INFO L93 Difference]: Finished difference Result 344 states and 601 transitions. [2020-04-18 11:50:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 601 transitions. [2020-04-18 11:50:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:26,409 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 11:50:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:26,410 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 84 times [2020-04-18 11:50:26,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:26,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667515028] [2020-04-18 11:50:26,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:26,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667515028] [2020-04-18 11:50:26,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448931395] [2020-04-18 11:50:26,524 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:26,582 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:50:26,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:26,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:26,583 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:26,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:26,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:26,721 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:26,722 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:26,725 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 11:50:26,725 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:26,807 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 11:50:26,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:50:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2055, Invalid=6671, Unknown=16, NotChecked=0, Total=8742 [2020-04-18 11:50:26,807 INFO L87 Difference]: Start difference. First operand 344 states and 601 transitions. Second operand 17 states. [2020-04-18 11:50:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:27,319 INFO L93 Difference]: Finished difference Result 353 states and 615 transitions. [2020-04-18 11:50:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 615 transitions. [2020-04-18 11:50:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:27,319 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 11:50:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 85 times [2020-04-18 11:50:27,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:27,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855858162] [2020-04-18 11:50:27,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:27,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855858162] [2020-04-18 11:50:27,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352550823] [2020-04-18 11:50:27,434 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:27,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:27,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:27,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:27,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:27,978 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:27,979 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:27,981 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 11:50:27,982 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:27,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:28,098 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:28,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:28,175 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 11:50:28,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 11:50:28,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2136, Invalid=6968, Unknown=16, NotChecked=0, Total=9120 [2020-04-18 11:50:28,177 INFO L87 Difference]: Start difference. First operand 353 states and 615 transitions. Second operand 19 states. [2020-04-18 11:50:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:29,576 INFO L93 Difference]: Finished difference Result 377 states and 644 transitions. [2020-04-18 11:50:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 644 transitions. [2020-04-18 11:50:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:29,577 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 11:50:29,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:29,577 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 86 times [2020-04-18 11:50:29,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:29,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002639044] [2020-04-18 11:50:29,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:29,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002639044] [2020-04-18 11:50:29,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671091570] [2020-04-18 11:50:29,666 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:29,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:50:29,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:29,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:29,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:29,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:29,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:50:29,864 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:29,864 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:29,867 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 50 transitions. [2020-04-18 11:50:29,867 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:29,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:29,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:29,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:29,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:30,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 11:50:30,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:30,073 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 29 times. [2020-04-18 11:50:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 11:50:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2451, Invalid=8245, Unknown=16, NotChecked=0, Total=10712 [2020-04-18 11:50:30,075 INFO L87 Difference]: Start difference. First operand 377 states and 644 transitions. Second operand 20 states. [2020-04-18 11:50:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:30,836 INFO L93 Difference]: Finished difference Result 425 states and 719 transitions. [2020-04-18 11:50:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 719 transitions. [2020-04-18 11:50:30,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:30,838 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 11:50:30,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:30,838 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 87 times [2020-04-18 11:50:30,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:30,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922540936] [2020-04-18 11:50:30,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:30,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922540936] [2020-04-18 11:50:30,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738768016] [2020-04-18 11:50:30,915 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:30,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:50:30,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:30,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 11:50:30,959 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:31,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:31,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-04-18 11:50:31,038 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:31,039 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:31,041 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 40 transitions. [2020-04-18 11:50:31,042 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:50:31,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:31,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:50:31,266 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 11:50:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 11:50:31,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=9865, Unknown=16, NotChecked=0, Total=12656 [2020-04-18 11:50:31,268 INFO L87 Difference]: Start difference. First operand 425 states and 719 transitions. Second operand 15 states. [2020-04-18 11:50:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:50:34,438 INFO L93 Difference]: Finished difference Result 453 states and 767 transitions. [2020-04-18 11:50:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 767 transitions. [2020-04-18 11:50:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:50:34,440 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 11:50:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:50:34,440 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 88 times [2020-04-18 11:50:34,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:50:34,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419608238] [2020-04-18 11:50:34,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:50:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:50:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:34,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419608238] [2020-04-18 11:50:34,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788460348] [2020-04-18 11:50:34,537 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:50:34,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 11:50:34,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:50:34,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:50:34,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:50:42,819 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 11:50:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:50:42,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:50:42,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 11:50:42,821 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:50:42,822 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:50:42,824 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:50:42,824 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:30,471 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 11:51:30,472 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:51:30,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:51:30,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3410, Invalid=12050, Unknown=40, NotChecked=0, Total=15500 [2020-04-18 11:51:30,473 INFO L87 Difference]: Start difference. First operand 453 states and 767 transitions. Second operand 18 states. [2020-04-18 11:51:35,810 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-18 11:51:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:45,537 INFO L93 Difference]: Finished difference Result 475 states and 794 transitions. [2020-04-18 11:51:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 794 transitions. [2020-04-18 11:51:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:45,538 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 11:51:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 89 times [2020-04-18 11:51:45,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:45,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032889201] [2020-04-18 11:51:45,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:45,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032889201] [2020-04-18 11:51:45,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134427563] [2020-04-18 11:51:45,625 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:45,671 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 11:51:45,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:45,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:45,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:48,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:48,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:48,514 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:48,514 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:48,517 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 11:51:48,517 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:48,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:49,065 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 11:51:49,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 11:51:49,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4157, Invalid=14433, Unknown=42, NotChecked=0, Total=18632 [2020-04-18 11:51:49,066 INFO L87 Difference]: Start difference. First operand 475 states and 794 transitions. Second operand 18 states. [2020-04-18 11:51:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:51:53,663 INFO L93 Difference]: Finished difference Result 495 states and 823 transitions. [2020-04-18 11:51:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 823 transitions. [2020-04-18 11:51:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:51:53,664 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 11:51:53,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:51:53,664 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 90 times [2020-04-18 11:51:53,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:51:53,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482033222] [2020-04-18 11:51:53,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:51:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:51:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:53,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482033222] [2020-04-18 11:51:53,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995113916] [2020-04-18 11:51:53,754 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:51:53,812 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 11:51:53,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:51:53,813 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:51:53,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:51:54,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:51:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:51:54,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:51:54,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:51:54,602 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:51:54,603 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:51:54,605 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 11:51:54,605 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:51:56,068 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 11:51:56,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:51:56,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5140, Invalid=17767, Unknown=45, NotChecked=0, Total=22952 [2020-04-18 11:51:56,070 INFO L87 Difference]: Start difference. First operand 495 states and 823 transitions. Second operand 17 states. [2020-04-18 11:52:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:04,052 INFO L93 Difference]: Finished difference Result 540 states and 879 transitions. [2020-04-18 11:52:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 879 transitions. [2020-04-18 11:52:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:04,053 INFO L105 Mcr]: ---- MCR iteration 19 ---- [2020-04-18 11:52:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 91 times [2020-04-18 11:52:04,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:04,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358854609] [2020-04-18 11:52:04,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:04,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358854609] [2020-04-18 11:52:04,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348950075] [2020-04-18 11:52:04,202 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:04,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:52:04,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:04,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:04,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:52:04,457 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:04,458 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:04,462 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:52:04,462 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:04,666 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:52:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:52:04,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6145, Invalid=21861, Unknown=50, NotChecked=0, Total=28056 [2020-04-18 11:52:04,668 INFO L87 Difference]: Start difference. First operand 540 states and 879 transitions. Second operand 17 states. [2020-04-18 11:52:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:07,185 INFO L93 Difference]: Finished difference Result 554 states and 889 transitions. [2020-04-18 11:52:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 889 transitions. [2020-04-18 11:52:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:07,187 INFO L105 Mcr]: ---- MCR iteration 20 ---- [2020-04-18 11:52:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 92 times [2020-04-18 11:52:07,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:07,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295275260] [2020-04-18 11:52:07,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:07,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295275260] [2020-04-18 11:52:07,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853884333] [2020-04-18 11:52:07,299 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:07,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 11:52:07,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:07,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 11:52:07,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:07,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:07,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 11:52:07,465 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:07,466 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:07,468 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 11:52:07,468 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:07,772 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 11:52:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:52:07,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7158, Invalid=25372, Unknown=50, NotChecked=0, Total=32580 [2020-04-18 11:52:07,774 INFO L87 Difference]: Start difference. First operand 554 states and 889 transitions. Second operand 17 states. [2020-04-18 11:52:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 11:52:10,771 INFO L93 Difference]: Finished difference Result 573 states and 908 transitions. [2020-04-18 11:52:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 908 transitions. [2020-04-18 11:52:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 11:52:10,772 INFO L105 Mcr]: ---- MCR iteration 21 ---- [2020-04-18 11:52:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 11:52:10,773 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 93 times [2020-04-18 11:52:10,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 11:52:10,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115736611] [2020-04-18 11:52:10,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 11:52:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 11:52:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:10,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115736611] [2020-04-18 11:52:10,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760678680] [2020-04-18 11:52:10,859 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:10,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 11:52:10,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 11:52:10,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 11:52:10,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 11:52:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 11:52:11,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 11:52:11,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-04-18 11:52:11,002 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 11:52:11,003 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 11:52:11,005 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 11:52:11,005 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 11:52:11,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 11:52:11,474 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 11:52:11,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 11:52:11,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8498, Invalid=31252, Unknown=50, NotChecked=0, Total=39800 [2020-04-18 11:52:11,476 INFO L87 Difference]: Start difference. First operand 573 states and 908 transitions. Second operand 17 states. Received shutdown request... [2020-04-18 11:52:21,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 11:52:21,231 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 11:52:21,235 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 11:52:21,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 11:52:21 BasicIcfg [2020-04-18 11:52:21,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 11:52:21,237 INFO L168 Benchmark]: Toolchain (without parser) took 279058.74 ms. Allocated memory was 138.9 MB in the beginning and 383.8 MB in the end (delta: 244.8 MB). Free memory was 100.7 MB in the beginning and 161.7 MB in the end (delta: -61.0 MB). Peak memory consumption was 183.8 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:21,237 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-18 11:52:21,238 INFO L168 Benchmark]: CACSL2BoogieTranslator took 741.81 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 98.7 MB in the beginning and 161.1 MB in the end (delta: -62.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:21,238 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.82 ms. Allocated memory is still 202.9 MB. Free memory was 161.1 MB in the beginning and 159.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:21,238 INFO L168 Benchmark]: Boogie Preprocessor took 38.03 ms. Allocated memory is still 202.9 MB. Free memory was 159.1 MB in the beginning and 157.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:21,238 INFO L168 Benchmark]: RCFGBuilder took 435.40 ms. Allocated memory is still 202.9 MB. Free memory was 157.8 MB in the beginning and 137.2 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:21,239 INFO L168 Benchmark]: TraceAbstraction took 277776.99 ms. Allocated memory was 202.9 MB in the beginning and 383.8 MB in the end (delta: 180.9 MB). Free memory was 137.2 MB in the beginning and 161.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 156.3 MB. Max. memory is 7.1 GB. [2020-04-18 11:52:21,240 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 741.81 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 98.7 MB in the beginning and 161.1 MB in the end (delta: -62.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.82 ms. Allocated memory is still 202.9 MB. Free memory was 161.1 MB in the beginning and 159.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.03 ms. Allocated memory is still 202.9 MB. Free memory was 159.1 MB in the beginning and 157.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 435.40 ms. Allocated memory is still 202.9 MB. Free memory was 157.8 MB in the beginning and 137.2 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 277776.99 ms. Allocated memory was 202.9 MB in the beginning and 383.8 MB in the end (delta: 180.9 MB). Free memory was 137.2 MB in the beginning and 161.7 MB in the end (delta: -24.6 MB). Peak memory consumption was 156.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 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, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 879 CheckedPairsTotal, 48 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 4,while PredicateComparison was comparing new predicate (quantifier-free) to 211 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 277.6s, OverallIterations: 17, TraceHistogramMax: 6, AutomataDifference: 19.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 237 SDtfs, 4541 SDslu, 4043 SDs, 0 SdLazy, 3320 SolverSat, 1006 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2876 GetRequests, 1837 SyntacticMatches, 203 SemanticMatches, 836 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62192 ImplicationChecksByTransitivity, 43.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=187occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 1145 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown