/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 07:34:55,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 07:34:55,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 07:34:55,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 07:34:55,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 07:34:55,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 07:34:55,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 07:34:55,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 07:34:55,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 07:34:55,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 07:34:55,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 07:34:55,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 07:34:55,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 07:34:55,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 07:34:55,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 07:34:55,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 07:34:55,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 07:34:55,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 07:34:55,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 07:34:55,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 07:34:55,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 07:34:55,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 07:34:55,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 07:34:55,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 07:34:55,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 07:34:55,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 07:34:55,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 07:34:55,928 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 07:34:55,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 07:34:55,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 07:34:55,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 07:34:55,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 07:34:55,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 07:34:55,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 07:34:55,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 07:34:55,933 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 07:34:55,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 07:34:55,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 07:34:55,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 07:34:55,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 07:34:55,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 07:34:55,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf [2020-04-18 07:34:55,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 07:34:55,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 07:34:55,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 07:34:55,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 07:34:55,953 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 07:34:55,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 07:34:55,953 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 07:34:55,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 07:34:55,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 07:34:55,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 07:34:55,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 07:34:55,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 07:34:55,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 07:34:55,955 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 07:34:55,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 07:34:55,955 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 07:34:55,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 07:34:55,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 07:34:55,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 07:34:55,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 07:34:55,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 07:34:55,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:34:55,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 07:34:55,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 07:34:55,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 07:34:55,957 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 07:34:55,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 07:34:55,958 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 07:34:55,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 07:34:55,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 07:34:56,248 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 07:34:56,273 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 07:34:56,277 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 07:34:56,278 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 07:34:56,279 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 07:34:56,280 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-04-18 07:34:56,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f444c0a91/edeb11cb647d4fa29316781ab0ba93c5/FLAG0075bdbda [2020-04-18 07:34:56,961 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 07:34:56,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-04-18 07:34:56,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f444c0a91/edeb11cb647d4fa29316781ab0ba93c5/FLAG0075bdbda [2020-04-18 07:34:57,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f444c0a91/edeb11cb647d4fa29316781ab0ba93c5 [2020-04-18 07:34:57,198 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 07:34:57,215 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 07:34:57,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 07:34:57,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 07:34:57,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 07:34:57,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:57,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1e6fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57, skipping insertion in model container [2020-04-18 07:34:57,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:57,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 07:34:57,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 07:34:57,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:34:57,749 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 07:34:57,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:34:57,913 INFO L208 MainTranslator]: Completed translation [2020-04-18 07:34:57,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57 WrapperNode [2020-04-18 07:34:57,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 07:34:57,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 07:34:57,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 07:34:57,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 07:34:57,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:57,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:57,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 07:34:57,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 07:34:57,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 07:34:57,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 07:34:57,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:57,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:57,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:57,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:58,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:58,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:58,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... [2020-04-18 07:34:58,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 07:34:58,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 07:34:58,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 07:34:58,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 07:34:58,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:34:58,068 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 07:34:58,069 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 07:34:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 07:34:58,069 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 07:34:58,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 07:34:58,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 07:34:58,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 07:34:58,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 07:34:58,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 07:34:58,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 07:34:58,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 07:34:58,073 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 07:34:58,407 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 07:34:58,407 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 07:34:58,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:34:58 BoogieIcfgContainer [2020-04-18 07:34:58,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 07:34:58,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 07:34:58,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 07:34:58,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 07:34:58,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 07:34:57" (1/3) ... [2020-04-18 07:34:58,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbe2a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:34:58, skipping insertion in model container [2020-04-18 07:34:58,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:34:57" (2/3) ... [2020-04-18 07:34:58,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbe2a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:34:58, skipping insertion in model container [2020-04-18 07:34:58,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:34:58" (3/3) ... [2020-04-18 07:34:58,420 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-04-18 07:34:58,430 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 07:34:58,430 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 07:34:58,436 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 07:34:58,437 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 07:34:58,464 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,465 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,465 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,465 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,466 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,466 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,467 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,467 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,467 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,468 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,468 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,468 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,469 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,469 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,470 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,470 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,470 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,470 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,471 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,471 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,471 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,472 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,472 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,472 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,473 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,473 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,473 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,474 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,477 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,478 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,478 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,478 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,478 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,479 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,484 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,485 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,485 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,485 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,486 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,486 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:34:58,512 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 07:34:58,530 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 07:34:58,530 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 07:34:58,530 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 07:34:58,531 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 07:34:58,531 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 07:34:58,531 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 07:34:58,531 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 07:34:58,531 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 07:34:58,547 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-18 07:34:58,548 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-18 07:34:58,586 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-18 07:34:58,587 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:34:58,594 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-18 07:34:58,597 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-18 07:34:58,622 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-18 07:34:58,622 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:34:58,623 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-18 07:34:58,625 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-18 07:34:58,626 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-18 07:34:59,861 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-18 07:35:00,127 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-18 07:35:00,127 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-18 07:35:00,131 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-18 07:35:00,142 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 07:35:00,145 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:35:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:35:00,152 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:00,153 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 07:35:00,153 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:00,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-18 07:35:00,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:00,174 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [536254911] [2020-04-18 07:35:00,195 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:00,212 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:35:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 07:35:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:35:00,215 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:00,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 2 times [2020-04-18 07:35:00,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:00,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131059309] [2020-04-18 07:35:00,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:00,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131059309] [2020-04-18 07:35:00,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:35:00,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:35:00,560 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:00,563 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:00,567 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:35:00,567 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:00,588 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:35:00,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:35:00,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 07:35:00,595 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 07:35:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:00,617 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 07:35:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 07:35:00,618 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:00,618 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [536254911] [2020-04-18 07:35:00,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:00,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 07:35:00,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [536254911] [2020-04-18 07:35:00,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 07:35:00,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:35:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:35:00,638 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 07:35:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:00,697 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-18 07:35:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 07:35:00,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 07:35:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:00,710 INFO L225 Difference]: With dead ends: 75 [2020-04-18 07:35:00,710 INFO L226 Difference]: Without dead ends: 42 [2020-04-18 07:35:00,711 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:35:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-18 07:35:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-18 07:35:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 07:35:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-18 07:35:00,751 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-18 07:35:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:00,752 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-18 07:35:00,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 07:35:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-18 07:35:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:35:00,753 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:00,753 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:00,753 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:00,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-18 07:35:00,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:00,754 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [833407890] [2020-04-18 07:35:00,755 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:00,756 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 07:35:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 07:35:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:35:00,757 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 2 times [2020-04-18 07:35:00,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:00,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458546140] [2020-04-18 07:35:00,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:00,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458546140] [2020-04-18 07:35:00,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:35:00,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:35:00,846 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:00,846 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:00,852 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:35:00,855 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:00,878 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 07:35:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:35:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:35:00,879 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 07:35:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:00,900 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2020-04-18 07:35:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2020-04-18 07:35:00,901 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:00,902 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [833407890] [2020-04-18 07:35:00,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:00,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:35:00,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [833407890] [2020-04-18 07:35:00,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-18 07:35:00,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:35:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:35:00,905 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-18 07:35:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:00,940 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-18 07:35:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-18 07:35:00,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-18 07:35:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:00,941 INFO L225 Difference]: With dead ends: 56 [2020-04-18 07:35:00,942 INFO L226 Difference]: Without dead ends: 50 [2020-04-18 07:35:00,943 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:35:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-18 07:35:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-18 07:35:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 07:35:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-18 07:35:00,953 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-18 07:35:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:00,954 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-18 07:35:00,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-18 07:35:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-18 07:35:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:35:00,956 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:00,956 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:00,956 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:00,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-18 07:35:00,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:00,957 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1541483820] [2020-04-18 07:35:00,957 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:00,959 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 07:35:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 07:35:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:35:00,962 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:00,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 2 times [2020-04-18 07:35:00,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:00,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609950379] [2020-04-18 07:35:00,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:01,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609950379] [2020-04-18 07:35:01,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:35:01,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:35:01,093 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:01,094 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:01,099 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:35:01,099 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:01,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:01,148 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:35:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:35:01,148 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 7 states. [2020-04-18 07:35:01,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:01,268 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2020-04-18 07:35:01,268 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 68 transitions. [2020-04-18 07:35:01,268 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:01,269 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1541483820] [2020-04-18 07:35:01,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:01,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:35:01,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1541483820] [2020-04-18 07:35:01,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 07:35:01,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:35:01,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:35:01,271 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-04-18 07:35:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:01,333 INFO L93 Difference]: Finished difference Result 62 states and 148 transitions. [2020-04-18 07:35:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-18 07:35:01,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-04-18 07:35:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:01,335 INFO L225 Difference]: With dead ends: 62 [2020-04-18 07:35:01,335 INFO L226 Difference]: Without dead ends: 44 [2020-04-18 07:35:01,336 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:35:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-04-18 07:35:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-04-18 07:35:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-18 07:35:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-18 07:35:01,342 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 10 [2020-04-18 07:35:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:01,343 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-18 07:35:01,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 07:35:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-18 07:35:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:35:01,343 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:01,344 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:01,344 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:01,344 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 3 times [2020-04-18 07:35:01,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:01,345 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1919195984] [2020-04-18 07:35:01,345 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:01,346 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 07:35:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:35:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:35:01,348 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:01,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:01,348 INFO L82 PathProgramCache]: Analyzing trace with hash 211005421, now seen corresponding path program 4 times [2020-04-18 07:35:01,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:01,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057576351] [2020-04-18 07:35:01,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:01,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057576351] [2020-04-18 07:35:01,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:35:01,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:35:01,409 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:01,410 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:01,413 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:35:01,413 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:01,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:01,489 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:01,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:35:01,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:35:01,490 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 7 states. [2020-04-18 07:35:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:01,620 INFO L93 Difference]: Finished difference Result 51 states and 95 transitions. [2020-04-18 07:35:01,620 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 95 transitions. [2020-04-18 07:35:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:35:01,621 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:35:01,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-18 07:35:01,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:01,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240606837] [2020-04-18 07:35:01,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:01,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240606837] [2020-04-18 07:35:01,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796483658] [2020-04-18 07:35:01,711 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:01,792 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:01,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:01,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:35:01,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:01,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:01,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-18 07:35:01,830 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:01,831 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:01,834 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 07:35:01,834 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:01,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:01,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:01,928 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:35:01,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 07:35:01,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-18 07:35:01,929 INFO L87 Difference]: Start difference. First operand 51 states and 95 transitions. Second operand 8 states. [2020-04-18 07:35:02,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:02,070 INFO L93 Difference]: Finished difference Result 64 states and 107 transitions. [2020-04-18 07:35:02,070 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 107 transitions. [2020-04-18 07:35:02,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:35:02,071 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:35:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 6 times [2020-04-18 07:35:02,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:02,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368487204] [2020-04-18 07:35:02,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:02,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368487204] [2020-04-18 07:35:02,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838360798] [2020-04-18 07:35:02,169 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:02,216 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:35:02,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:02,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:35:02,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:02,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:02,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-18 07:35:02,229 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:02,230 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:02,232 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:35:02,232 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:02,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:02,270 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:02,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 07:35:02,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:35:02,271 INFO L87 Difference]: Start difference. First operand 64 states and 107 transitions. Second operand 8 states. [2020-04-18 07:35:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:02,479 INFO L93 Difference]: Finished difference Result 66 states and 108 transitions. [2020-04-18 07:35:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 108 transitions. [2020-04-18 07:35:02,480 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:02,481 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1919195984] [2020-04-18 07:35:02,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:02,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:35:02,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1919195984] [2020-04-18 07:35:02,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 07:35:02,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:02,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:35:02,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:35:02,483 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 16 states. [2020-04-18 07:35:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:02,630 INFO L93 Difference]: Finished difference Result 78 states and 191 transitions. [2020-04-18 07:35:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 07:35:02,630 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 11 [2020-04-18 07:35:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:02,631 INFO L225 Difference]: With dead ends: 78 [2020-04-18 07:35:02,631 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 07:35:02,632 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:35:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 07:35:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-18 07:35:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-18 07:35:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-18 07:35:02,639 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 11 [2020-04-18 07:35:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:02,639 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-18 07:35:02,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 07:35:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-18 07:35:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:35:02,640 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:02,640 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:03,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:03,045 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:03,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 7 times [2020-04-18 07:35:03,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:03,047 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [203158934] [2020-04-18 07:35:03,048 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:03,049 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 07:35:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 07:35:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:35:03,051 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:03,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1480255448, now seen corresponding path program 8 times [2020-04-18 07:35:03,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:03,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117136515] [2020-04-18 07:35:03,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:03,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117136515] [2020-04-18 07:35:03,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:35:03,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:35:03,136 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:03,137 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:03,140 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:35:03,140 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:03,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:03,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:03,173 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:03,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:35:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:35:03,174 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 7 states. [2020-04-18 07:35:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:03,308 INFO L93 Difference]: Finished difference Result 72 states and 143 transitions. [2020-04-18 07:35:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 143 transitions. [2020-04-18 07:35:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:35:03,309 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:35:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-18 07:35:03,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:03,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128988057] [2020-04-18 07:35:03,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:03,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128988057] [2020-04-18 07:35:03,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298225784] [2020-04-18 07:35:03,402 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:03,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:35:03,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:03,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:35:03,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:03,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:03,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:03,491 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:03,492 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:03,496 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:35:03,496 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:03,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:03,526 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:03,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:03,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:35:03,526 INFO L87 Difference]: Start difference. First operand 72 states and 143 transitions. Second operand 9 states. [2020-04-18 07:35:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:03,681 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-04-18 07:35:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2020-04-18 07:35:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:35:03,681 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:35:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:03,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 10 times [2020-04-18 07:35:03,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:03,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472483122] [2020-04-18 07:35:03,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:03,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472483122] [2020-04-18 07:35:03,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971790122] [2020-04-18 07:35:03,759 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:03,804 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:03,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:03,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:35:03,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:03,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:03,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:03,826 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:03,827 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:03,829 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 07:35:03,829 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:03,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:03,877 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:03,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:03,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:35:03,878 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand 9 states. [2020-04-18 07:35:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:04,047 INFO L93 Difference]: Finished difference Result 83 states and 158 transitions. [2020-04-18 07:35:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 158 transitions. [2020-04-18 07:35:04,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:04,049 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [203158934] [2020-04-18 07:35:04,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:04,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:35:04,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [203158934] [2020-04-18 07:35:04,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:35:04,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:04,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:35:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:35:04,052 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 12 states. [2020-04-18 07:35:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:04,174 INFO L93 Difference]: Finished difference Result 70 states and 171 transitions. [2020-04-18 07:35:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-18 07:35:04,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-04-18 07:35:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:04,176 INFO L225 Difference]: With dead ends: 70 [2020-04-18 07:35:04,176 INFO L226 Difference]: Without dead ends: 58 [2020-04-18 07:35:04,176 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:35:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-18 07:35:04,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-04-18 07:35:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 07:35:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-18 07:35:04,183 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 12 [2020-04-18 07:35:04,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:04,183 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-18 07:35:04,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:35:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-18 07:35:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:04,184 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:04,184 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:04,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:04,596 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:04,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:04,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 11 times [2020-04-18 07:35:04,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:04,598 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [158877485] [2020-04-18 07:35:04,599 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:04,601 INFO L259 McrAutomatonBuilder]: Finished intersection with 87 states and 190 transitions. [2020-04-18 07:35:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-04-18 07:35:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:04,603 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:04,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1378156957, now seen corresponding path program 12 times [2020-04-18 07:35:04,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:04,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312695535] [2020-04-18 07:35:04,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:04,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312695535] [2020-04-18 07:35:04,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:35:04,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:35:04,691 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:04,692 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:04,710 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 46 transitions. [2020-04-18 07:35:04,710 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:04,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:04,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:04,750 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:04,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:35:04,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:35:04,751 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 7 states. [2020-04-18 07:35:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:04,896 INFO L93 Difference]: Finished difference Result 123 states and 265 transitions. [2020-04-18 07:35:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 265 transitions. [2020-04-18 07:35:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:04,897 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:35:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash 891297657, now seen corresponding path program 13 times [2020-04-18 07:35:04,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:04,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630262887] [2020-04-18 07:35:04,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:04,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630262887] [2020-04-18 07:35:04,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547255251] [2020-04-18 07:35:04,961 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:05,005 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:35:05,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:05,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:05,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:05,017 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:05,018 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:05,021 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 07:35:05,021 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:05,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:05,048 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:05,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:05,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:35:05,049 INFO L87 Difference]: Start difference. First operand 123 states and 265 transitions. Second operand 9 states. [2020-04-18 07:35:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:05,230 INFO L93 Difference]: Finished difference Result 148 states and 314 transitions. [2020-04-18 07:35:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 314 transitions. [2020-04-18 07:35:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:05,231 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:35:05,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:05,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1405192407, now seen corresponding path program 14 times [2020-04-18 07:35:05,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:05,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756290482] [2020-04-18 07:35:05,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:05,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756290482] [2020-04-18 07:35:05,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586012033] [2020-04-18 07:35:05,298 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:05,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:05,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:05,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:35:05,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:05,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:05,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:05,392 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:05,393 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:05,397 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 07:35:05,397 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:05,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:05,452 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:05,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:05,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:35:05,453 INFO L87 Difference]: Start difference. First operand 148 states and 314 transitions. Second operand 9 states. [2020-04-18 07:35:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:05,648 INFO L93 Difference]: Finished difference Result 162 states and 337 transitions. [2020-04-18 07:35:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 337 transitions. [2020-04-18 07:35:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:05,649 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:35:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 15 times [2020-04-18 07:35:05,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:05,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033538185] [2020-04-18 07:35:05,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:05,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033538185] [2020-04-18 07:35:05,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335975913] [2020-04-18 07:35:05,759 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:05,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:35:05,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:05,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:05,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:05,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:05,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:05,836 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:05,837 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:05,839 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 07:35:05,839 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:05,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:05,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:05,872 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:05,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:05,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:35:05,873 INFO L87 Difference]: Start difference. First operand 162 states and 337 transitions. Second operand 11 states. [2020-04-18 07:35:06,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:06,085 INFO L93 Difference]: Finished difference Result 167 states and 342 transitions. [2020-04-18 07:35:06,085 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 342 transitions. [2020-04-18 07:35:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:06,086 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:35:06,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:06,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 16 times [2020-04-18 07:35:06,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:06,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343798236] [2020-04-18 07:35:06,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:06,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343798236] [2020-04-18 07:35:06,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892698567] [2020-04-18 07:35:06,173 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:06,222 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:06,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:06,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:06,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:06,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:06,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:06,246 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:06,247 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:06,249 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 07:35:06,250 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:06,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:06,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:06,253 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:06,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:35:06,253 INFO L87 Difference]: Start difference. First operand 167 states and 342 transitions. Second operand 11 states. [2020-04-18 07:35:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:06,495 INFO L93 Difference]: Finished difference Result 176 states and 355 transitions. [2020-04-18 07:35:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 355 transitions. [2020-04-18 07:35:06,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:06,496 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:35:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:06,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 17 times [2020-04-18 07:35:06,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:06,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746686781] [2020-04-18 07:35:06,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:06,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746686781] [2020-04-18 07:35:06,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076507329] [2020-04-18 07:35:06,572 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:06,619 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:35:06,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:06,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:06,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:06,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:06,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:06,636 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:06,637 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:06,639 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 07:35:06,639 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:06,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:06,683 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:06,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:06,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:35:06,684 INFO L87 Difference]: Start difference. First operand 176 states and 355 transitions. Second operand 11 states. [2020-04-18 07:35:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:06,969 INFO L93 Difference]: Finished difference Result 178 states and 357 transitions. [2020-04-18 07:35:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 357 transitions. [2020-04-18 07:35:06,970 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:06,971 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [158877485] [2020-04-18 07:35:06,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:06,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-04-18 07:35:06,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [158877485] [2020-04-18 07:35:06,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 07:35:06,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:06,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-04-18 07:35:06,973 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 17 states. [2020-04-18 07:35:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:07,152 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-04-18 07:35:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 07:35:07,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-18 07:35:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:07,153 INFO L225 Difference]: With dead ends: 74 [2020-04-18 07:35:07,154 INFO L226 Difference]: Without dead ends: 62 [2020-04-18 07:35:07,154 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 166 SyntacticMatches, 29 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-04-18 07:35:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-18 07:35:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2020-04-18 07:35:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-18 07:35:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-18 07:35:07,159 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 14 [2020-04-18 07:35:07,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:07,160 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-18 07:35:07,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 07:35:07,160 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-18 07:35:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:07,160 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:07,161 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:08,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:08,166 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:08,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:08,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 18 times [2020-04-18 07:35:08,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:08,168 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1291222956] [2020-04-18 07:35:08,168 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:08,169 INFO L259 McrAutomatonBuilder]: Finished intersection with 102 states and 227 transitions. [2020-04-18 07:35:08,170 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states. [2020-04-18 07:35:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:08,171 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash 226807821, now seen corresponding path program 19 times [2020-04-18 07:35:08,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:08,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705136123] [2020-04-18 07:35:08,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-04-18 07:35:08,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705136123] [2020-04-18 07:35:08,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:35:08,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:35:08,235 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:08,236 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:08,238 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 49 transitions. [2020-04-18 07:35:08,238 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:08,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:08,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:08,267 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:08,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:35:08,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:35:08,267 INFO L87 Difference]: Start difference. First operand 102 states. Second operand 7 states. [2020-04-18 07:35:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:08,399 INFO L93 Difference]: Finished difference Result 153 states and 339 transitions. [2020-04-18 07:35:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 339 transitions. [2020-04-18 07:35:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:08,400 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:35:08,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:08,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1860424119, now seen corresponding path program 20 times [2020-04-18 07:35:08,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:08,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105919720] [2020-04-18 07:35:08,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:35:08,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105919720] [2020-04-18 07:35:08,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623108087] [2020-04-18 07:35:08,469 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:08,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:08,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:08,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:35:08,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:35:08,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:08,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:08,549 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:08,550 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:08,552 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-04-18 07:35:08,552 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:08,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:08,587 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:08,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:08,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:35:08,588 INFO L87 Difference]: Start difference. First operand 153 states and 339 transitions. Second operand 9 states. [2020-04-18 07:35:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:08,749 INFO L93 Difference]: Finished difference Result 189 states and 414 transitions. [2020-04-18 07:35:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 414 transitions. [2020-04-18 07:35:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:08,750 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:35:08,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:08,750 INFO L82 PathProgramCache]: Analyzing trace with hash 611292185, now seen corresponding path program 21 times [2020-04-18 07:35:08,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:08,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236666069] [2020-04-18 07:35:08,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:35:08,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236666069] [2020-04-18 07:35:08,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356843506] [2020-04-18 07:35:08,811 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:08,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:35:08,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:08,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:35:08,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:35:08,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:08,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:08,890 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:08,891 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:08,893 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 39 transitions. [2020-04-18 07:35:08,893 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:08,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:08,938 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:08,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:08,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:35:08,939 INFO L87 Difference]: Start difference. First operand 189 states and 414 transitions. Second operand 9 states. [2020-04-18 07:35:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:09,122 INFO L93 Difference]: Finished difference Result 213 states and 460 transitions. [2020-04-18 07:35:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 460 transitions. [2020-04-18 07:35:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:09,123 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:35:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:09,124 INFO L82 PathProgramCache]: Analyzing trace with hash 963815535, now seen corresponding path program 22 times [2020-04-18 07:35:09,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:09,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300136151] [2020-04-18 07:35:09,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:09,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300136151] [2020-04-18 07:35:09,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348726566] [2020-04-18 07:35:09,212 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:09,270 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:09,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:09,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:09,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:09,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:09,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:09,282 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:09,302 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:09,305 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-04-18 07:35:09,305 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:09,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:09,341 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:09,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:09,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:35:09,342 INFO L87 Difference]: Start difference. First operand 213 states and 460 transitions. Second operand 11 states. [2020-04-18 07:35:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:09,582 INFO L93 Difference]: Finished difference Result 223 states and 475 transitions. [2020-04-18 07:35:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 475 transitions. [2020-04-18 07:35:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:09,583 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:35:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:09,583 INFO L82 PathProgramCache]: Analyzing trace with hash 895431245, now seen corresponding path program 23 times [2020-04-18 07:35:09,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:09,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903818791] [2020-04-18 07:35:09,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:09,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903818791] [2020-04-18 07:35:09,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118731322] [2020-04-18 07:35:09,661 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:09,722 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:35:09,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:09,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:09,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:09,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:09,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:09,758 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:09,759 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:09,761 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 29 transitions. [2020-04-18 07:35:09,761 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:09,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:09,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:09,764 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:09,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:09,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:35:09,764 INFO L87 Difference]: Start difference. First operand 223 states and 475 transitions. Second operand 11 states. [2020-04-18 07:35:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:10,041 INFO L93 Difference]: Finished difference Result 239 states and 503 transitions. [2020-04-18 07:35:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 503 transitions. [2020-04-18 07:35:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:10,042 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:35:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1409325995, now seen corresponding path program 24 times [2020-04-18 07:35:10,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:10,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340637370] [2020-04-18 07:35:10,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:10,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340637370] [2020-04-18 07:35:10,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422042719] [2020-04-18 07:35:10,158 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:10,212 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:35:10,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:10,213 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:10,214 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:35:10,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:10,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:10,231 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:10,232 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:10,234 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-04-18 07:35:10,234 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:10,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,296 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:10,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:35:10,297 INFO L87 Difference]: Start difference. First operand 239 states and 503 transitions. Second operand 11 states. [2020-04-18 07:35:10,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:10,640 INFO L93 Difference]: Finished difference Result 246 states and 511 transitions. [2020-04-18 07:35:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 511 transitions. [2020-04-18 07:35:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:10,641 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:35:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:10,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 25 times [2020-04-18 07:35:10,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:10,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367156551] [2020-04-18 07:35:10,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:10,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367156551] [2020-04-18 07:35:10,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800979621] [2020-04-18 07:35:10,744 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:10,806 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:10,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:10,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:10,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 07:35:10,818 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:10,819 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:10,822 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:35:10,822 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:10,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:10,959 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:35:10,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:35:10,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 07:35:10,960 INFO L87 Difference]: Start difference. First operand 246 states and 511 transitions. Second operand 12 states. [2020-04-18 07:35:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:11,244 INFO L93 Difference]: Finished difference Result 345 states and 667 transitions. [2020-04-18 07:35:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 667 transitions. [2020-04-18 07:35:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:11,246 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:35:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 26 times [2020-04-18 07:35:11,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:11,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480225292] [2020-04-18 07:35:11,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:11,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480225292] [2020-04-18 07:35:11,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638085911] [2020-04-18 07:35:11,360 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:11,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:11,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:11,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:11,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:11,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:11,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 07:35:11,419 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:11,420 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:11,422 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-04-18 07:35:11,422 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:11,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:11,482 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:11,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:35:11,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1565, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 07:35:11,484 INFO L87 Difference]: Start difference. First operand 345 states and 667 transitions. Second operand 12 states. [2020-04-18 07:35:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:11,851 INFO L93 Difference]: Finished difference Result 431 states and 825 transitions. [2020-04-18 07:35:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 825 transitions. [2020-04-18 07:35:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:11,852 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:35:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 27 times [2020-04-18 07:35:11,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:11,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466630265] [2020-04-18 07:35:11,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:11,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466630265] [2020-04-18 07:35:11,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067564444] [2020-04-18 07:35:11,930 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:11,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 07:35:11,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:11,977 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:11,978 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:11,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:11,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 07:35:11,992 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:11,993 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:11,995 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-04-18 07:35:11,995 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:11,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:11,996 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:11,997 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:11,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:35:11,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 07:35:11,998 INFO L87 Difference]: Start difference. First operand 431 states and 825 transitions. Second operand 12 states. [2020-04-18 07:35:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:12,359 INFO L93 Difference]: Finished difference Result 441 states and 836 transitions. [2020-04-18 07:35:12,360 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 836 transitions. [2020-04-18 07:35:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-18 07:35:12,361 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:35:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 28 times [2020-04-18 07:35:12,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:12,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395003373] [2020-04-18 07:35:12,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:12,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395003373] [2020-04-18 07:35:12,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449989189] [2020-04-18 07:35:12,456 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:12,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:12,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:12,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:12,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:12,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:12,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-18 07:35:12,559 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:12,561 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:12,564 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-04-18 07:35:12,565 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:12,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:12,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:12,568 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:35:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 07:35:12,569 INFO L87 Difference]: Start difference. First operand 441 states and 836 transitions. Second operand 12 states. [2020-04-18 07:35:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:12,947 INFO L93 Difference]: Finished difference Result 441 states and 836 transitions. [2020-04-18 07:35:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 836 transitions. [2020-04-18 07:35:12,949 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:12,949 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1291222956] [2020-04-18 07:35:12,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:12,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-04-18 07:35:12,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1291222956] [2020-04-18 07:35:12,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-18 07:35:12,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:12,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-18 07:35:12,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 07:35:12,951 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 26 states. [2020-04-18 07:35:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:13,194 INFO L93 Difference]: Finished difference Result 94 states and 231 transitions. [2020-04-18 07:35:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-18 07:35:13,195 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 15 [2020-04-18 07:35:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:13,196 INFO L225 Difference]: With dead ends: 94 [2020-04-18 07:35:13,196 INFO L226 Difference]: Without dead ends: 70 [2020-04-18 07:35:13,197 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 310 SyntacticMatches, 62 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2314 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=640, Invalid=1910, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 07:35:13,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-18 07:35:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-04-18 07:35:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-18 07:35:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-18 07:35:13,202 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 15 [2020-04-18 07:35:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:13,202 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-18 07:35:13,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-18 07:35:13,203 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-18 07:35:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:13,203 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:13,203 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:15,011 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,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:15,011 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:15,012 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 29 times [2020-04-18 07:35:15,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:15,013 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [113608805] [2020-04-18 07:35:15,014 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:15,015 INFO L259 McrAutomatonBuilder]: Finished intersection with 122 states and 276 transitions. [2020-04-18 07:35:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states. [2020-04-18 07:35:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:15,017 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1101535864, now seen corresponding path program 30 times [2020-04-18 07:35:15,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:15,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332469565] [2020-04-18 07:35:15,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:35:15,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332469565] [2020-04-18 07:35:15,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:35:15,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:35:15,060 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:15,061 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:15,063 INFO L259 McrAutomatonBuilder]: Finished intersection with 37 states and 56 transitions. [2020-04-18 07:35:15,064 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:15,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:15,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:15,093 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:15,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:35:15,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:35:15,094 INFO L87 Difference]: Start difference. First operand 122 states. Second operand 7 states. [2020-04-18 07:35:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:15,200 INFO L93 Difference]: Finished difference Result 190 states and 431 transitions. [2020-04-18 07:35:15,200 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 431 transitions. [2020-04-18 07:35:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:15,201 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:35:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1559815134, now seen corresponding path program 31 times [2020-04-18 07:35:15,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:15,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081546799] [2020-04-18 07:35:15,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:15,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081546799] [2020-04-18 07:35:15,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682217742] [2020-04-18 07:35:15,264 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:15,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:35:15,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:15,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:15,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:15,326 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:15,327 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:15,337 INFO L259 McrAutomatonBuilder]: Finished intersection with 31 states and 44 transitions. [2020-04-18 07:35:15,337 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:15,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:15,367 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:15,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:15,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:35:15,368 INFO L87 Difference]: Start difference. First operand 190 states and 431 transitions. Second operand 9 states. [2020-04-18 07:35:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:15,557 INFO L93 Difference]: Finished difference Result 239 states and 538 transitions. [2020-04-18 07:35:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 538 transitions. [2020-04-18 07:35:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:15,558 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:35:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1486020228, now seen corresponding path program 32 times [2020-04-18 07:35:15,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:15,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240541487] [2020-04-18 07:35:15,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:15,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240541487] [2020-04-18 07:35:15,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803015169] [2020-04-18 07:35:15,629 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:15,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:15,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:15,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:35:15,694 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:15,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:15,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:15,713 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:15,714 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:15,718 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 46 transitions. [2020-04-18 07:35:15,718 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:15,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:15,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:15,758 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:15,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:15,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:35:15,759 INFO L87 Difference]: Start difference. First operand 239 states and 538 transitions. Second operand 9 states. [2020-04-18 07:35:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:15,971 INFO L93 Difference]: Finished difference Result 275 states and 613 transitions. [2020-04-18 07:35:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 613 transitions. [2020-04-18 07:35:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:15,975 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:35:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1838543578, now seen corresponding path program 33 times [2020-04-18 07:35:15,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:15,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720795615] [2020-04-18 07:35:15,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:16,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720795615] [2020-04-18 07:35:16,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926771936] [2020-04-18 07:35:16,081 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:16,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:35:16,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:16,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:16,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:16,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:16,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:16,151 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:16,152 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:16,155 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 38 transitions. [2020-04-18 07:35:16,155 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:16,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:16,196 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:16,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:16,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:35:16,197 INFO L87 Difference]: Start difference. First operand 275 states and 613 transitions. Second operand 11 states. [2020-04-18 07:35:16,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:16,423 INFO L93 Difference]: Finished difference Result 291 states and 641 transitions. [2020-04-18 07:35:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 641 transitions. [2020-04-18 07:35:16,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:16,425 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:35:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1770159288, now seen corresponding path program 34 times [2020-04-18 07:35:16,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:16,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724832635] [2020-04-18 07:35:16,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:16,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724832635] [2020-04-18 07:35:16,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656147500] [2020-04-18 07:35:16,499 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:16,540 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:16,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:16,541 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:16,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:16,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:16,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:16,554 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:16,555 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:16,558 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2020-04-18 07:35:16,558 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:16,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:16,583 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:16,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:16,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:35:16,583 INFO L87 Difference]: Start difference. First operand 291 states and 641 transitions. Second operand 11 states. [2020-04-18 07:35:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:16,858 INFO L93 Difference]: Finished difference Result 316 states and 690 transitions. [2020-04-18 07:35:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 690 transitions. [2020-04-18 07:35:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:16,859 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:35:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:16,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2010913258, now seen corresponding path program 35 times [2020-04-18 07:35:16,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:16,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537158088] [2020-04-18 07:35:16,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:16,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537158088] [2020-04-18 07:35:16,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038717892] [2020-04-18 07:35:16,930 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:16,981 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:35:16,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:16,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:16,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:17,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:17,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:17,013 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:17,014 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:17,017 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 38 transitions. [2020-04-18 07:35:17,017 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:17,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:17,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:17,062 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:17,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:35:17,064 INFO L87 Difference]: Start difference. First operand 316 states and 690 transitions. Second operand 11 states. [2020-04-18 07:35:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:17,381 INFO L93 Difference]: Finished difference Result 330 states and 713 transitions. [2020-04-18 07:35:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 713 transitions. [2020-04-18 07:35:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:17,382 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:35:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 36 times [2020-04-18 07:35:17,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:17,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368244897] [2020-04-18 07:35:17,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:17,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368244897] [2020-04-18 07:35:17,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94786837] [2020-04-18 07:35:17,506 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:17,551 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 07:35:17,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:17,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:35:17,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:17,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:17,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:35:17,575 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:17,576 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:17,579 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2020-04-18 07:35:17,579 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:17,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:17,636 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:17,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:35:17,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 07:35:17,637 INFO L87 Difference]: Start difference. First operand 330 states and 713 transitions. Second operand 13 states. [2020-04-18 07:35:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:17,910 INFO L93 Difference]: Finished difference Result 335 states and 718 transitions. [2020-04-18 07:35:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 718 transitions. [2020-04-18 07:35:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:17,911 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:35:17,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:17,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 37 times [2020-04-18 07:35:17,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:17,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503036165] [2020-04-18 07:35:17,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:18,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503036165] [2020-04-18 07:35:18,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719639347] [2020-04-18 07:35:18,015 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:18,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:35:18,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:18,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:18,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:35:18,084 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:18,085 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:18,087 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-04-18 07:35:18,088 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:18,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:18,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:18,090 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:18,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:35:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:35:18,091 INFO L87 Difference]: Start difference. First operand 335 states and 718 transitions. Second operand 13 states. [2020-04-18 07:35:18,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:18,409 INFO L93 Difference]: Finished difference Result 340 states and 723 transitions. [2020-04-18 07:35:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 723 transitions. [2020-04-18 07:35:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:18,410 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:35:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 38 times [2020-04-18 07:35:18,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:18,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993358035] [2020-04-18 07:35:18,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:18,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993358035] [2020-04-18 07:35:18,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989888438] [2020-04-18 07:35:18,514 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:18,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:18,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:18,585 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:35:18,586 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:18,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:18,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:35:18,616 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:18,618 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:18,622 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-04-18 07:35:18,622 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:18,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:18,644 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:18,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:35:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:35:18,645 INFO L87 Difference]: Start difference. First operand 340 states and 723 transitions. Second operand 13 states. [2020-04-18 07:35:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:19,050 INFO L93 Difference]: Finished difference Result 349 states and 736 transitions. [2020-04-18 07:35:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 736 transitions. [2020-04-18 07:35:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-18 07:35:19,051 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:35:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 39 times [2020-04-18 07:35:19,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:19,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073823645] [2020-04-18 07:35:19,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:19,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073823645] [2020-04-18 07:35:19,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219255641] [2020-04-18 07:35:19,144 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:19,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 07:35:19,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:19,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:35:19,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:19,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:19,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:35:19,214 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:19,215 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:19,217 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-04-18 07:35:19,218 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:19,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:19,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:19,272 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:19,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:35:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 07:35:19,273 INFO L87 Difference]: Start difference. First operand 349 states and 736 transitions. Second operand 13 states. [2020-04-18 07:35:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:19,706 INFO L93 Difference]: Finished difference Result 351 states and 738 transitions. [2020-04-18 07:35:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 738 transitions. [2020-04-18 07:35:19,707 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:35:19,708 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [113608805] [2020-04-18 07:35:19,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:35:19,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-04-18 07:35:19,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [113608805] [2020-04-18 07:35:19,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-18 07:35:19,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:35:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-18 07:35:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1281, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:35:19,710 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 22 states. [2020-04-18 07:35:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:19,928 INFO L93 Difference]: Finished difference Result 86 states and 211 transitions. [2020-04-18 07:35:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 07:35:19,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 16 [2020-04-18 07:35:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:35:19,929 INFO L225 Difference]: With dead ends: 86 [2020-04-18 07:35:19,930 INFO L226 Difference]: Without dead ends: 74 [2020-04-18 07:35:19,930 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 328 SyntacticMatches, 68 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=441, Invalid=1281, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:35:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-18 07:35:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2020-04-18 07:35:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 07:35:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-18 07:35:19,937 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 16 [2020-04-18 07:35:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:35:19,938 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-18 07:35:19,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-18 07:35:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-18 07:35:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:19,942 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:35:19,942 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:35:21,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:21,748 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:35:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 40 times [2020-04-18 07:35:21,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:35:21,750 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [326219688] [2020-04-18 07:35:21,751 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:21,753 INFO L259 McrAutomatonBuilder]: Finished intersection with 163 states and 378 transitions. [2020-04-18 07:35:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states. [2020-04-18 07:35:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:21,755 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:35:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1412066749, now seen corresponding path program 41 times [2020-04-18 07:35:21,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:21,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681829644] [2020-04-18 07:35:21,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-04-18 07:35:21,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681829644] [2020-04-18 07:35:21,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:35:21,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:35:21,802 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:21,803 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:21,807 INFO L259 McrAutomatonBuilder]: Finished intersection with 43 states and 66 transitions. [2020-04-18 07:35:21,807 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:21,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:21,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:21,842 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:35:21,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:35:21,843 INFO L87 Difference]: Start difference. First operand 163 states. Second operand 7 states. [2020-04-18 07:35:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:21,954 INFO L93 Difference]: Finished difference Result 273 states and 641 transitions. [2020-04-18 07:35:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 641 transitions. [2020-04-18 07:35:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:21,955 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:35:21,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:21,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1985398233, now seen corresponding path program 42 times [2020-04-18 07:35:21,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:21,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300477154] [2020-04-18 07:35:21,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:35:22,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300477154] [2020-04-18 07:35:22,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994274084] [2020-04-18 07:35:22,010 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:22,064 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:35:22,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:22,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:35:22,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:35:22,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:22,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:22,076 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:22,077 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:22,080 INFO L259 McrAutomatonBuilder]: Finished intersection with 36 states and 52 transitions. [2020-04-18 07:35:22,080 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:22,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:22,106 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:22,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:22,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:35:22,106 INFO L87 Difference]: Start difference. First operand 273 states and 641 transitions. Second operand 9 states. [2020-04-18 07:35:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:22,272 INFO L93 Difference]: Finished difference Result 354 states and 828 transitions. [2020-04-18 07:35:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 828 transitions. [2020-04-18 07:35:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:22,273 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:35:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:22,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1917013943, now seen corresponding path program 43 times [2020-04-18 07:35:22,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:22,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515139261] [2020-04-18 07:35:22,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:35:22,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515139261] [2020-04-18 07:35:22,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010216460] [2020-04-18 07:35:22,337 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:22,389 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:35:22,390 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-04-18 07:35:22,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:22,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-18 07:35:22,404 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:22,405 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:22,409 INFO L259 McrAutomatonBuilder]: Finished intersection with 38 states and 56 transitions. [2020-04-18 07:35:22,409 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:22,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:22,447 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:22,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:35:22,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:35:22,448 INFO L87 Difference]: Start difference. First operand 354 states and 828 transitions. Second operand 9 states. [2020-04-18 07:35:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:22,646 INFO L93 Difference]: Finished difference Result 422 states and 983 transitions. [2020-04-18 07:35:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 983 transitions. [2020-04-18 07:35:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:22,647 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:35:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash -39664095, now seen corresponding path program 44 times [2020-04-18 07:35:22,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:22,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171238661] [2020-04-18 07:35:22,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:22,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171238661] [2020-04-18 07:35:22,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750354253] [2020-04-18 07:35:22,753 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:22,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:22,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:22,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:22,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:22,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:22,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:22,810 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:22,811 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:22,814 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 46 transitions. [2020-04-18 07:35:22,814 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:22,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:22,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:22,861 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:22,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:22,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:35:22,861 INFO L87 Difference]: Start difference. First operand 422 states and 983 transitions. Second operand 11 states. [2020-04-18 07:35:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:23,085 INFO L93 Difference]: Finished difference Result 455 states and 1050 transitions. [2020-04-18 07:35:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1050 transitions. [2020-04-18 07:35:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:23,087 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:35:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:23,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2135390211, now seen corresponding path program 45 times [2020-04-18 07:35:23,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:23,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950722663] [2020-04-18 07:35:23,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:23,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950722663] [2020-04-18 07:35:23,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099670030] [2020-04-18 07:35:23,164 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:23,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:35:23,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:23,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 07:35:23,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:23,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:23,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:23,248 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:23,249 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:23,252 INFO L259 McrAutomatonBuilder]: Finished intersection with 32 states and 44 transitions. [2020-04-18 07:35:23,253 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:23,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:23,254 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:23,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:23,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:35:23,255 INFO L87 Difference]: Start difference. First operand 455 states and 1050 transitions. Second operand 11 states. [2020-04-18 07:35:23,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:23,506 INFO L93 Difference]: Finished difference Result 504 states and 1157 transitions. [2020-04-18 07:35:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1157 transitions. [2020-04-18 07:35:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:23,507 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:35:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash 886258277, now seen corresponding path program 46 times [2020-04-18 07:35:23,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:23,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797332344] [2020-04-18 07:35:23,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:23,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797332344] [2020-04-18 07:35:23,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714469276] [2020-04-18 07:35:23,589 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:23,638 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:23,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:23,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:35:23,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-04-18 07:35:23,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:23,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-18 07:35:23,648 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:23,649 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:23,653 INFO L259 McrAutomatonBuilder]: Finished intersection with 34 states and 48 transitions. [2020-04-18 07:35:23,653 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:23,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:23,692 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:23,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:35:23,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-04-18 07:35:23,693 INFO L87 Difference]: Start difference. First operand 504 states and 1157 transitions. Second operand 11 states. [2020-04-18 07:35:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:24,027 INFO L93 Difference]: Finished difference Result 540 states and 1232 transitions. [2020-04-18 07:35:24,027 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1232 transitions. [2020-04-18 07:35:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:24,028 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:35:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:24,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1608806907, now seen corresponding path program 47 times [2020-04-18 07:35:24,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:24,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111421174] [2020-04-18 07:35:24,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:24,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111421174] [2020-04-18 07:35:24,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561422476] [2020-04-18 07:35:24,127 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:24,175 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 07:35:24,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:24,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:35:24,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:24,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:24,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:35:24,193 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:24,195 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:24,201 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2020-04-18 07:35:24,201 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:24,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:24,255 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:35:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:35:24,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 07:35:24,256 INFO L87 Difference]: Start difference. First operand 540 states and 1232 transitions. Second operand 13 states. [2020-04-18 07:35:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:24,652 INFO L93 Difference]: Finished difference Result 556 states and 1260 transitions. [2020-04-18 07:35:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1260 transitions. [2020-04-18 07:35:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:24,653 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:35:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash 316013657, now seen corresponding path program 48 times [2020-04-18 07:35:24,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:24,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671696920] [2020-04-18 07:35:24,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:24,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671696920] [2020-04-18 07:35:24,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228595763] [2020-04-18 07:35:24,758 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:24,808 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 07:35:24,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:24,809 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:35:24,810 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:24,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:24,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:35:24,826 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:24,827 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:24,832 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2020-04-18 07:35:24,832 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:24,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:24,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:24,835 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:24,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:35:24,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:35:24,836 INFO L87 Difference]: Start difference. First operand 556 states and 1260 transitions. Second operand 13 states. [2020-04-18 07:35:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:25,183 INFO L93 Difference]: Finished difference Result 572 states and 1288 transitions. [2020-04-18 07:35:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1288 transitions. [2020-04-18 07:35:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:25,185 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:35:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash 247629367, now seen corresponding path program 49 times [2020-04-18 07:35:25,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:25,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781338661] [2020-04-18 07:35:25,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:25,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781338661] [2020-04-18 07:35:25,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334034779] [2020-04-18 07:35:25,289 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:25,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:35:25,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:25,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:25,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:35:25,345 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:25,347 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:25,350 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2020-04-18 07:35:25,350 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:25,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,353 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:25,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:35:25,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:35:25,353 INFO L87 Difference]: Start difference. First operand 572 states and 1288 transitions. Second operand 13 states. [2020-04-18 07:35:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:25,749 INFO L93 Difference]: Finished difference Result 597 states and 1337 transitions. [2020-04-18 07:35:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1337 transitions. [2020-04-18 07:35:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:25,750 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:35:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash 761524117, now seen corresponding path program 50 times [2020-04-18 07:35:25,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:25,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337753298] [2020-04-18 07:35:25,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:25,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337753298] [2020-04-18 07:35:25,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038413896] [2020-04-18 07:35:25,829 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:25,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:25,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:25,877 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:35:25,878 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:35:25,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:25,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-18 07:35:25,887 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:25,888 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:25,891 INFO L259 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2020-04-18 07:35:25,891 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:25,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:25,963 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:35:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:35:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 07:35:25,964 INFO L87 Difference]: Start difference. First operand 597 states and 1337 transitions. Second operand 13 states. [2020-04-18 07:35:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:26,445 INFO L93 Difference]: Finished difference Result 611 states and 1360 transitions. [2020-04-18 07:35:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1360 transitions. [2020-04-18 07:35:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-18 07:35:26,447 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:35:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:26,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 51 times [2020-04-18 07:35:26,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:26,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751988373] [2020-04-18 07:35:26,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-18 07:35:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-18 07:35:26,522 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-18 07:35:26,523 INFO L174 FreeRefinementEngine]: Strategy MCR found a feasible trace [2020-04-18 07:35:26,523 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-18 07:35:28,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:28,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 07:35:28 BasicIcfg [2020-04-18 07:35:28,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 07:35:28,399 INFO L168 Benchmark]: Toolchain (without parser) took 31200.90 ms. Allocated memory was 137.9 MB in the beginning and 430.4 MB in the end (delta: 292.6 MB). Free memory was 101.1 MB in the beginning and 127.2 MB in the end (delta: -26.1 MB). Peak memory consumption was 266.4 MB. Max. memory is 7.1 GB. [2020-04-18 07:35:28,400 INFO L168 Benchmark]: CDTParser took 1.45 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-04-18 07:35:28,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 698.34 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 99.0 MB in the beginning and 158.4 MB in the end (delta: -59.4 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-04-18 07:35:28,400 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.21 ms. Allocated memory is still 200.8 MB. Free memory was 157.7 MB in the beginning and 155.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 07:35:28,400 INFO L168 Benchmark]: Boogie Preprocessor took 27.67 ms. Allocated memory is still 200.8 MB. Free memory was 155.7 MB in the beginning and 154.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 07:35:28,401 INFO L168 Benchmark]: RCFGBuilder took 397.69 ms. Allocated memory is still 200.8 MB. Free memory was 154.4 MB in the beginning and 134.1 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-04-18 07:35:28,401 INFO L168 Benchmark]: TraceAbstraction took 29985.21 ms. Allocated memory was 200.8 MB in the beginning and 430.4 MB in the end (delta: 229.6 MB). Free memory was 134.1 MB in the beginning and 127.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 236.5 MB. Max. memory is 7.1 GB. [2020-04-18 07:35:28,403 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.45 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 698.34 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 99.0 MB in the beginning and 158.4 MB in the end (delta: -59.4 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 71.21 ms. Allocated memory is still 200.8 MB. Free memory was 157.7 MB in the beginning and 155.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.67 ms. Allocated memory is still 200.8 MB. Free memory was 155.7 MB in the beginning and 154.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 397.69 ms. Allocated memory is still 200.8 MB. Free memory was 154.4 MB in the beginning and 134.1 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29985.21 ms. Allocated memory was 200.8 MB in the beginning and 430.4 MB in the end (delta: 229.6 MB). Free memory was 134.1 MB in the beginning and 127.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 236.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.8s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 108 SDtfs, 454 SDslu, 427 SDs, 0 SdLazy, 466 SolverSat, 214 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1306 GetRequests, 944 SyntacticMatches, 177 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5253 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 102 StatesRemovedByMinimization, 7 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 proved your program to be incorrect! Received shutdown request...