/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-12 00:23:02,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-12 00:23:02,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-12 00:23:02,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-12 00:23:02,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-12 00:23:02,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-12 00:23:02,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-12 00:23:02,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-12 00:23:02,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-12 00:23:02,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-12 00:23:02,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-12 00:23:02,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-12 00:23:02,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-12 00:23:02,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-12 00:23:02,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-12 00:23:02,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-12 00:23:02,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-12 00:23:02,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-12 00:23:02,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-12 00:23:02,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-12 00:23:02,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-12 00:23:02,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-12 00:23:02,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-12 00:23:02,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-12 00:23:02,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-12 00:23:02,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-12 00:23:02,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-12 00:23:02,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-12 00:23:02,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-12 00:23:02,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-12 00:23:02,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-12 00:23:02,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-12 00:23:02,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-12 00:23:02,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-12 00:23:02,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-12 00:23:02,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-12 00:23:02,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-12 00:23:02,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-12 00:23:02,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-12 00:23:02,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-12 00:23:02,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-12 00:23:02,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-12 00:23:02,974 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-12 00:23:02,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-12 00:23:02,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-12 00:23:02,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-12 00:23:02,977 INFO L138 SettingsManager]: * Use SBE=true [2020-09-12 00:23:02,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-12 00:23:02,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-12 00:23:02,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-12 00:23:02,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-12 00:23:02,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-12 00:23:02,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-12 00:23:02,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-12 00:23:02,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-12 00:23:02,980 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-12 00:23:02,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-12 00:23:02,981 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-12 00:23:02,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-12 00:23:02,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-12 00:23:02,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-12 00:23:02,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-12 00:23:02,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-12 00:23:02,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-12 00:23:02,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-12 00:23:02,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-12 00:23:02,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-12 00:23:02,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-12 00:23:02,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-12 00:23:02,983 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-12 00:23:02,983 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-12 00:23:02,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-12 00:23:02,984 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-12 00:23:03,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-12 00:23:03,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-12 00:23:03,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-12 00:23:03,466 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-12 00:23:03,467 INFO L275 PluginConnector]: CDTParser initialized [2020-09-12 00:23:03,468 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-12 00:23:03,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6079350c6/f411d3e9565a40fdb62a30d77faf17b2/FLAG50b61ed1d [2020-09-12 00:23:04,244 INFO L306 CDTParser]: Found 1 translation units. [2020-09-12 00:23:04,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-12 00:23:04,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6079350c6/f411d3e9565a40fdb62a30d77faf17b2/FLAG50b61ed1d [2020-09-12 00:23:04,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6079350c6/f411d3e9565a40fdb62a30d77faf17b2 [2020-09-12 00:23:04,478 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-12 00:23:04,483 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-12 00:23:04,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-12 00:23:04,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-12 00:23:04,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-12 00:23:04,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 12:23:04" (1/1) ... [2020-09-12 00:23:04,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52697317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:04, skipping insertion in model container [2020-09-12 00:23:04,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 12:23:04" (1/1) ... [2020-09-12 00:23:04,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-12 00:23:04,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-12 00:23:05,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-12 00:23:05,301 INFO L203 MainTranslator]: Completed pre-run [2020-09-12 00:23:05,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-12 00:23:05,586 INFO L208 MainTranslator]: Completed translation [2020-09-12 00:23:05,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05 WrapperNode [2020-09-12 00:23:05,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-12 00:23:05,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-12 00:23:05,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-12 00:23:05,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-12 00:23:05,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... [2020-09-12 00:23:05,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... [2020-09-12 00:23:05,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-12 00:23:05,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-12 00:23:05,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-12 00:23:05,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-12 00:23:05,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... [2020-09-12 00:23:05,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... [2020-09-12 00:23:05,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... [2020-09-12 00:23:05,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... [2020-09-12 00:23:05,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... [2020-09-12 00:23:05,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... [2020-09-12 00:23:05,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... [2020-09-12 00:23:05,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-12 00:23:05,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-12 00:23:05,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-12 00:23:05,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-12 00:23:05,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-12 00:23:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-12 00:23:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-12 00:23:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-12 00:23:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-09-12 00:23:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-09-12 00:23:05,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-09-12 00:23:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-12 00:23:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-12 00:23:05,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-12 00:23:05,799 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-12 00:23:06,273 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-12 00:23:06,273 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-12 00:23:06,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 12:23:06 BoogieIcfgContainer [2020-09-12 00:23:06,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-12 00:23:06,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-12 00:23:06,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-12 00:23:06,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-12 00:23:06,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 12:23:04" (1/3) ... [2020-09-12 00:23:06,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24763c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 12:23:06, skipping insertion in model container [2020-09-12 00:23:06,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 12:23:05" (2/3) ... [2020-09-12 00:23:06,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24763c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 12:23:06, skipping insertion in model container [2020-09-12 00:23:06,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 12:23:06" (3/3) ... [2020-09-12 00:23:06,289 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-09-12 00:23:06,301 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-12 00:23:06,301 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-12 00:23:06,311 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-12 00:23:06,312 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-12 00:23:06,336 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,336 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,337 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,337 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,337 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,337 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,337 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,338 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,338 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,338 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,338 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,338 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,339 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,339 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,339 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,339 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,340 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,340 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,340 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,340 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,340 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,341 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,341 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,345 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,346 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,346 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,346 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,346 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,347 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,347 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,347 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,347 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-12 00:23:06,379 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-12 00:23:06,407 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-12 00:23:06,407 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-12 00:23:06,407 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-12 00:23:06,407 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-12 00:23:06,408 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-12 00:23:06,408 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-12 00:23:06,408 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-12 00:23:06,408 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-12 00:23:06,426 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-09-12 00:23:06,429 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-12 00:23:06,488 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-12 00:23:06,488 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-12 00:23:06,496 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-12 00:23:06,501 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-12 00:23:06,525 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-12 00:23:06,525 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-12 00:23:06,526 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-12 00:23:06,527 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-09-12 00:23:06,529 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-12 00:23:08,350 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-12 00:23:08,541 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-12 00:23:09,214 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-09-12 00:23:09,489 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-12 00:23:09,502 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-09-12 00:23:09,502 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-12 00:23:09,508 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-09-12 00:23:09,520 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-09-12 00:23:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-12 00:23:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-12 00:23:09,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:09,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:09,534 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-09-12 00:23:09,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:09,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548917854] [2020-09-12 00:23:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-12 00:23:09,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548917854] [2020-09-12 00:23:09,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-12 00:23:09,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-12 00:23:09,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2139914053] [2020-09-12 00:23:09,801 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:09,807 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:09,825 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-09-12 00:23:09,825 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:09,880 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [154#(< ULTIMATE.start_main_~i~1 20)] [2020-09-12 00:23:09,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-12 00:23:09,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-12 00:23:09,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-12 00:23:09,905 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-09-12 00:23:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:09,966 INFO L93 Difference]: Finished difference Result 58 states and 112 transitions. [2020-09-12 00:23:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-12 00:23:09,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-09-12 00:23:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:09,987 INFO L225 Difference]: With dead ends: 58 [2020-09-12 00:23:09,987 INFO L226 Difference]: Without dead ends: 58 [2020-09-12 00:23:09,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-12 00:23:10,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-12 00:23:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-09-12 00:23:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-12 00:23:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 112 transitions. [2020-09-12 00:23:10,040 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 112 transitions. Word has length 8 [2020-09-12 00:23:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:10,040 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 112 transitions. [2020-09-12 00:23:10,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-12 00:23:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 112 transitions. [2020-09-12 00:23:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-12 00:23:10,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:10,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:10,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-12 00:23:10,043 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1202349723, now seen corresponding path program 1 times [2020-09-12 00:23:10,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:10,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891016513] [2020-09-12 00:23:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-12 00:23:10,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891016513] [2020-09-12 00:23:10,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-12 00:23:10,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-12 00:23:10,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [999989923] [2020-09-12 00:23:10,164 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:10,166 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:10,174 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 46 transitions. [2020-09-12 00:23:10,174 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:10,273 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [332#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-12 00:23:10,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-12 00:23:10,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:10,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-12 00:23:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-12 00:23:10,276 INFO L87 Difference]: Start difference. First operand 58 states and 112 transitions. Second operand 4 states. [2020-09-12 00:23:10,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:10,298 INFO L93 Difference]: Finished difference Result 103 states and 202 transitions. [2020-09-12 00:23:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-12 00:23:10,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-12 00:23:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:10,301 INFO L225 Difference]: With dead ends: 103 [2020-09-12 00:23:10,301 INFO L226 Difference]: Without dead ends: 103 [2020-09-12 00:23:10,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-12 00:23:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-12 00:23:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-09-12 00:23:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-12 00:23:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 202 transitions. [2020-09-12 00:23:10,316 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 202 transitions. Word has length 14 [2020-09-12 00:23:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:10,316 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 202 transitions. [2020-09-12 00:23:10,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-12 00:23:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 202 transitions. [2020-09-12 00:23:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-12 00:23:10,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:10,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:10,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-12 00:23:10,318 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:10,319 INFO L82 PathProgramCache]: Analyzing trace with hash -570543039, now seen corresponding path program 1 times [2020-09-12 00:23:10,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:10,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601182238] [2020-09-12 00:23:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-12 00:23:10,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601182238] [2020-09-12 00:23:10,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-12 00:23:10,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-12 00:23:10,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [308417803] [2020-09-12 00:23:10,461 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:10,465 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:10,472 INFO L274 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2020-09-12 00:23:10,472 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:10,499 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-12 00:23:10,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-12 00:23:10,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:10,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-12 00:23:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-12 00:23:10,500 INFO L87 Difference]: Start difference. First operand 103 states and 202 transitions. Second operand 3 states. [2020-09-12 00:23:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:10,517 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-09-12 00:23:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-12 00:23:10,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-12 00:23:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:10,519 INFO L225 Difference]: With dead ends: 79 [2020-09-12 00:23:10,519 INFO L226 Difference]: Without dead ends: 79 [2020-09-12 00:23:10,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-12 00:23:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-12 00:23:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-09-12 00:23:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-12 00:23:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-09-12 00:23:10,528 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 22 [2020-09-12 00:23:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:10,528 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-09-12 00:23:10,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-12 00:23:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-09-12 00:23:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-12 00:23:10,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:10,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:10,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-12 00:23:10,531 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:10,531 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 2 times [2020-09-12 00:23:10,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:10,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276243169] [2020-09-12 00:23:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-12 00:23:10,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276243169] [2020-09-12 00:23:10,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107829122] [2020-09-12 00:23:10,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:10,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-12 00:23:10,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:10,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-12 00:23:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-12 00:23:10,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:10,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-12 00:23:10,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1238021312] [2020-09-12 00:23:10,762 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:10,766 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:10,772 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2020-09-12 00:23:10,773 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:10,817 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [951#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-12 00:23:10,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-12 00:23:10,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:10,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-12 00:23:10,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-12 00:23:10,818 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 7 states. [2020-09-12 00:23:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:10,852 INFO L93 Difference]: Finished difference Result 127 states and 194 transitions. [2020-09-12 00:23:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-12 00:23:10,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-12 00:23:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:10,854 INFO L225 Difference]: With dead ends: 127 [2020-09-12 00:23:10,854 INFO L226 Difference]: Without dead ends: 127 [2020-09-12 00:23:10,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-12 00:23:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-12 00:23:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-09-12 00:23:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-12 00:23:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 194 transitions. [2020-09-12 00:23:10,866 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 194 transitions. Word has length 22 [2020-09-12 00:23:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:10,866 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 194 transitions. [2020-09-12 00:23:10,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-12 00:23:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 194 transitions. [2020-09-12 00:23:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-12 00:23:10,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:10,868 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:11,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:11,073 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:11,074 INFO L82 PathProgramCache]: Analyzing trace with hash 517535263, now seen corresponding path program 3 times [2020-09-12 00:23:11,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:11,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739086494] [2020-09-12 00:23:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-12 00:23:11,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739086494] [2020-09-12 00:23:11,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307936529] [2020-09-12 00:23:11,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:11,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-12 00:23:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:11,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-12 00:23:11,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-12 00:23:11,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:11,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-12 00:23:11,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1247171172] [2020-09-12 00:23:11,293 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:11,299 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:11,312 INFO L274 McrAutomatonBuilder]: Finished intersection with 39 states and 46 transitions. [2020-09-12 00:23:11,313 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:11,391 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1426#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 1427#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:11,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-12 00:23:11,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:11,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-12 00:23:11,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-12 00:23:11,393 INFO L87 Difference]: Start difference. First operand 127 states and 194 transitions. Second operand 8 states. [2020-09-12 00:23:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:11,437 INFO L93 Difference]: Finished difference Result 174 states and 256 transitions. [2020-09-12 00:23:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-12 00:23:11,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-09-12 00:23:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:11,440 INFO L225 Difference]: With dead ends: 174 [2020-09-12 00:23:11,440 INFO L226 Difference]: Without dead ends: 174 [2020-09-12 00:23:11,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-12 00:23:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-12 00:23:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2020-09-12 00:23:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-12 00:23:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-09-12 00:23:11,453 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 30 [2020-09-12 00:23:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:11,453 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-09-12 00:23:11,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-12 00:23:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-09-12 00:23:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-12 00:23:11,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:11,456 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:11,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:11,670 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:11,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 4 times [2020-09-12 00:23:11,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:11,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613412298] [2020-09-12 00:23:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-12 00:23:11,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613412298] [2020-09-12 00:23:11,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772565720] [2020-09-12 00:23:11,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:11,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-12 00:23:11,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:11,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-12 00:23:11,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-12 00:23:11,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:11,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-12 00:23:11,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1798066844] [2020-09-12 00:23:11,952 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:11,960 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:11,972 INFO L274 McrAutomatonBuilder]: Finished intersection with 45 states and 55 transitions. [2020-09-12 00:23:11,973 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:12,074 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2026#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-12 00:23:12,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-12 00:23:12,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:12,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-12 00:23:12,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-12 00:23:12,076 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 9 states. [2020-09-12 00:23:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:12,123 INFO L93 Difference]: Finished difference Result 220 states and 322 transitions. [2020-09-12 00:23:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-12 00:23:12,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-09-12 00:23:12,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:12,125 INFO L225 Difference]: With dead ends: 220 [2020-09-12 00:23:12,126 INFO L226 Difference]: Without dead ends: 220 [2020-09-12 00:23:12,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-09-12 00:23:12,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-12 00:23:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-09-12 00:23:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-09-12 00:23:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 322 transitions. [2020-09-12 00:23:12,149 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 322 transitions. Word has length 33 [2020-09-12 00:23:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:12,150 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 322 transitions. [2020-09-12 00:23:12,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-12 00:23:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 322 transitions. [2020-09-12 00:23:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-12 00:23:12,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:12,153 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:12,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:12,367 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1068728479, now seen corresponding path program 5 times [2020-09-12 00:23:12,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:12,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323793374] [2020-09-12 00:23:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-12 00:23:12,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323793374] [2020-09-12 00:23:12,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567186949] [2020-09-12 00:23:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:12,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-12 00:23:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-12 00:23:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-12 00:23:12,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:12,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-12 00:23:12,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2141596400] [2020-09-12 00:23:12,674 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:12,684 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:12,708 INFO L274 McrAutomatonBuilder]: Finished intersection with 53 states and 63 transitions. [2020-09-12 00:23:12,708 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:12,787 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2817#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-12 00:23:12,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-12 00:23:12,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:12,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-12 00:23:12,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-12 00:23:12,791 INFO L87 Difference]: Start difference. First operand 220 states and 322 transitions. Second operand 11 states. [2020-09-12 00:23:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:12,856 INFO L93 Difference]: Finished difference Result 280 states and 406 transitions. [2020-09-12 00:23:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-12 00:23:12,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-12 00:23:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:12,859 INFO L225 Difference]: With dead ends: 280 [2020-09-12 00:23:12,859 INFO L226 Difference]: Without dead ends: 280 [2020-09-12 00:23:12,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-12 00:23:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-12 00:23:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-09-12 00:23:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-09-12 00:23:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 406 transitions. [2020-09-12 00:23:12,879 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 406 transitions. Word has length 41 [2020-09-12 00:23:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:12,881 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 406 transitions. [2020-09-12 00:23:12,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-12 00:23:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 406 transitions. [2020-09-12 00:23:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-12 00:23:12,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:12,885 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:13,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:13,087 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:13,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2088433981, now seen corresponding path program 6 times [2020-09-12 00:23:13,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:13,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766852210] [2020-09-12 00:23:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-12 00:23:13,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766852210] [2020-09-12 00:23:13,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735677825] [2020-09-12 00:23:13,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:13,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-12 00:23:13,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-12 00:23:13,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-12 00:23:13,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:13,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-12 00:23:13,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [164855840] [2020-09-12 00:23:13,380 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:13,392 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:13,418 INFO L274 McrAutomatonBuilder]: Finished intersection with 61 states and 71 transitions. [2020-09-12 00:23:13,419 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:13,528 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3809#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 3810#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:13,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-12 00:23:13,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:13,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-12 00:23:13,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-12 00:23:13,530 INFO L87 Difference]: Start difference. First operand 280 states and 406 transitions. Second operand 9 states. [2020-09-12 00:23:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:13,591 INFO L93 Difference]: Finished difference Result 359 states and 504 transitions. [2020-09-12 00:23:13,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-12 00:23:13,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-12 00:23:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:13,594 INFO L225 Difference]: With dead ends: 359 [2020-09-12 00:23:13,595 INFO L226 Difference]: Without dead ends: 359 [2020-09-12 00:23:13,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-12 00:23:13,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-09-12 00:23:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 337. [2020-09-12 00:23:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-12 00:23:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2020-09-12 00:23:13,607 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 49 [2020-09-12 00:23:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:13,608 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2020-09-12 00:23:13,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-12 00:23:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2020-09-12 00:23:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-12 00:23:13,610 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:13,610 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:13,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:13,826 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:13,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1332663897, now seen corresponding path program 7 times [2020-09-12 00:23:13,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:13,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769679819] [2020-09-12 00:23:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-12 00:23:14,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769679819] [2020-09-12 00:23:14,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207942490] [2020-09-12 00:23:14,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:14,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-12 00:23:14,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-12 00:23:14,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:14,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-12 00:23:14,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1300077358] [2020-09-12 00:23:14,115 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:14,130 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:14,227 INFO L274 McrAutomatonBuilder]: Finished intersection with 67 states and 80 transitions. [2020-09-12 00:23:14,227 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:14,295 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5009#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-12 00:23:14,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-12 00:23:14,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-12 00:23:14,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-12 00:23:14,296 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand 13 states. [2020-09-12 00:23:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:14,355 INFO L93 Difference]: Finished difference Result 409 states and 576 transitions. [2020-09-12 00:23:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-12 00:23:14,356 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-12 00:23:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:14,358 INFO L225 Difference]: With dead ends: 409 [2020-09-12 00:23:14,358 INFO L226 Difference]: Without dead ends: 409 [2020-09-12 00:23:14,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-12 00:23:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-09-12 00:23:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 409. [2020-09-12 00:23:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-09-12 00:23:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 576 transitions. [2020-09-12 00:23:14,368 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 576 transitions. Word has length 52 [2020-09-12 00:23:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:14,369 INFO L479 AbstractCegarLoop]: Abstraction has 409 states and 576 transitions. [2020-09-12 00:23:14,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-12 00:23:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 576 transitions. [2020-09-12 00:23:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-12 00:23:14,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:14,371 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:14,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:14,584 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1082708405, now seen corresponding path program 8 times [2020-09-12 00:23:14,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:14,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835591832] [2020-09-12 00:23:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-12 00:23:14,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835591832] [2020-09-12 00:23:14,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793823665] [2020-09-12 00:23:14,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:14,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-12 00:23:14,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:14,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-12 00:23:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-12 00:23:14,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:14,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-12 00:23:14,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [92016786] [2020-09-12 00:23:14,915 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:14,933 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:14,973 INFO L274 McrAutomatonBuilder]: Finished intersection with 75 states and 88 transitions. [2020-09-12 00:23:14,974 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:15,045 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6428#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-12 00:23:15,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-12 00:23:15,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:15,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-12 00:23:15,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-12 00:23:15,047 INFO L87 Difference]: Start difference. First operand 409 states and 576 transitions. Second operand 15 states. [2020-09-12 00:23:15,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:15,160 INFO L93 Difference]: Finished difference Result 481 states and 674 transitions. [2020-09-12 00:23:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-12 00:23:15,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-09-12 00:23:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:15,165 INFO L225 Difference]: With dead ends: 481 [2020-09-12 00:23:15,165 INFO L226 Difference]: Without dead ends: 481 [2020-09-12 00:23:15,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-12 00:23:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-09-12 00:23:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2020-09-12 00:23:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-09-12 00:23:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 674 transitions. [2020-09-12 00:23:15,176 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 674 transitions. Word has length 60 [2020-09-12 00:23:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:15,176 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 674 transitions. [2020-09-12 00:23:15,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-12 00:23:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 674 transitions. [2020-09-12 00:23:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-12 00:23:15,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:15,179 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:15,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-12 00:23:15,394 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:15,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1779413265, now seen corresponding path program 9 times [2020-09-12 00:23:15,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:15,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543742743] [2020-09-12 00:23:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 10 proven. 276 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-12 00:23:15,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543742743] [2020-09-12 00:23:15,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775487686] [2020-09-12 00:23:15,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:15,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-12 00:23:15,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:15,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-12 00:23:15,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-09-12 00:23:15,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:15,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2020-09-12 00:23:15,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [458584653] [2020-09-12 00:23:15,802 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:15,822 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:15,871 INFO L274 McrAutomatonBuilder]: Finished intersection with 83 states and 96 transitions. [2020-09-12 00:23:15,872 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:16,035 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [8093#(< thread_function_mutexThread1of1ForFork0_~i~0 20), 8094#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:16,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-12 00:23:16,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-12 00:23:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-09-12 00:23:16,037 INFO L87 Difference]: Start difference. First operand 481 states and 674 transitions. Second operand 22 states. [2020-09-12 00:23:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:18,972 INFO L93 Difference]: Finished difference Result 680 states and 924 transitions. [2020-09-12 00:23:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-09-12 00:23:18,973 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-09-12 00:23:18,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:18,977 INFO L225 Difference]: With dead ends: 680 [2020-09-12 00:23:18,977 INFO L226 Difference]: Without dead ends: 680 [2020-09-12 00:23:18,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3608 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2880, Invalid=8250, Unknown=0, NotChecked=0, Total=11130 [2020-09-12 00:23:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2020-09-12 00:23:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 646. [2020-09-12 00:23:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-09-12 00:23:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 886 transitions. [2020-09-12 00:23:18,995 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 886 transitions. Word has length 68 [2020-09-12 00:23:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:18,996 INFO L479 AbstractCegarLoop]: Abstraction has 646 states and 886 transitions. [2020-09-12 00:23:18,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-12 00:23:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 886 transitions. [2020-09-12 00:23:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-12 00:23:18,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:19,000 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:19,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-12 00:23:19,216 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash 72445841, now seen corresponding path program 10 times [2020-09-12 00:23:19,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:19,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481242433] [2020-09-12 00:23:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 13 proven. 378 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-12 00:23:19,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481242433] [2020-09-12 00:23:19,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441469786] [2020-09-12 00:23:19,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:19,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-12 00:23:19,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:19,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-12 00:23:19,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 13 proven. 378 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-12 00:23:19,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:19,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-12 00:23:19,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [737909754] [2020-09-12 00:23:19,793 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:19,826 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:19,975 INFO L274 McrAutomatonBuilder]: Finished intersection with 97 states and 113 transitions. [2020-09-12 00:23:19,975 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:20,064 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10557#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-12 00:23:20,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-12 00:23:20,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:20,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-12 00:23:20,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-12 00:23:20,066 INFO L87 Difference]: Start difference. First operand 646 states and 886 transitions. Second operand 19 states. [2020-09-12 00:23:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:20,174 INFO L93 Difference]: Finished difference Result 730 states and 998 transitions. [2020-09-12 00:23:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-12 00:23:20,176 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-09-12 00:23:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:20,179 INFO L225 Difference]: With dead ends: 730 [2020-09-12 00:23:20,179 INFO L226 Difference]: Without dead ends: 730 [2020-09-12 00:23:20,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-12 00:23:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-09-12 00:23:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 730. [2020-09-12 00:23:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 730 states. [2020-09-12 00:23:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 998 transitions. [2020-09-12 00:23:20,196 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 998 transitions. Word has length 79 [2020-09-12 00:23:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:20,197 INFO L479 AbstractCegarLoop]: Abstraction has 730 states and 998 transitions. [2020-09-12 00:23:20,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-12 00:23:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 998 transitions. [2020-09-12 00:23:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-12 00:23:20,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:20,202 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:20,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:20,410 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:20,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1605477485, now seen corresponding path program 11 times [2020-09-12 00:23:20,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:20,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690963981] [2020-09-12 00:23:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 13 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-12 00:23:20,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690963981] [2020-09-12 00:23:20,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555870280] [2020-09-12 00:23:20,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:20,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-12 00:23:20,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:20,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-12 00:23:20,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 13 proven. 496 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-12 00:23:20,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:20,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-12 00:23:20,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [227188660] [2020-09-12 00:23:20,942 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:20,976 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:21,461 INFO L274 McrAutomatonBuilder]: Finished intersection with 105 states and 121 transitions. [2020-09-12 00:23:21,462 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:21,572 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13026#(< thread_function_mutexThread1of1ForFork0_~i~0 20)] [2020-09-12 00:23:21,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-12 00:23:21,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:21,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-12 00:23:21,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-12 00:23:21,573 INFO L87 Difference]: Start difference. First operand 730 states and 998 transitions. Second operand 21 states. [2020-09-12 00:23:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:21,663 INFO L93 Difference]: Finished difference Result 814 states and 1110 transitions. [2020-09-12 00:23:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-12 00:23:21,664 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-09-12 00:23:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:21,668 INFO L225 Difference]: With dead ends: 814 [2020-09-12 00:23:21,668 INFO L226 Difference]: Without dead ends: 814 [2020-09-12 00:23:21,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-12 00:23:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-09-12 00:23:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2020-09-12 00:23:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-09-12 00:23:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1110 transitions. [2020-09-12 00:23:21,685 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1110 transitions. Word has length 87 [2020-09-12 00:23:21,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:21,685 INFO L479 AbstractCegarLoop]: Abstraction has 814 states and 1110 transitions. [2020-09-12 00:23:21,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-12 00:23:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1110 transitions. [2020-09-12 00:23:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-12 00:23:21,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:21,688 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:21,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:21,892 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:21,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1402127031, now seen corresponding path program 12 times [2020-09-12 00:23:21,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:21,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428238573] [2020-09-12 00:23:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 13 proven. 630 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-12 00:23:22,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428238573] [2020-09-12 00:23:22,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134343243] [2020-09-12 00:23:22,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:22,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-12 00:23:22,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:22,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-12 00:23:22,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-09-12 00:23:22,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:22,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2020-09-12 00:23:22,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1168709437] [2020-09-12 00:23:22,650 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:22,697 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:22,928 INFO L274 McrAutomatonBuilder]: Finished intersection with 113 states and 129 transitions. [2020-09-12 00:23:22,928 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:23,123 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [15778#(< thread_function_mutexThread1of1ForFork0_~i~0 20), 15779#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:23,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-12 00:23:23,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:23,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-12 00:23:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-09-12 00:23:23,125 INFO L87 Difference]: Start difference. First operand 814 states and 1110 transitions. Second operand 29 states. [2020-09-12 00:23:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:30,063 INFO L93 Difference]: Finished difference Result 1073 states and 1428 transitions. [2020-09-12 00:23:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-09-12 00:23:30,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-09-12 00:23:30,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:30,070 INFO L225 Difference]: With dead ends: 1073 [2020-09-12 00:23:30,070 INFO L226 Difference]: Without dead ends: 1073 [2020-09-12 00:23:30,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 238 SyntacticMatches, 4 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9948 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=7161, Invalid=21231, Unknown=0, NotChecked=0, Total=28392 [2020-09-12 00:23:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2020-09-12 00:23:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1027. [2020-09-12 00:23:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-09-12 00:23:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1378 transitions. [2020-09-12 00:23:30,097 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1378 transitions. Word has length 95 [2020-09-12 00:23:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:30,098 INFO L479 AbstractCegarLoop]: Abstraction has 1027 states and 1378 transitions. [2020-09-12 00:23:30,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-12 00:23:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1378 transitions. [2020-09-12 00:23:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-12 00:23:30,101 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:30,101 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:30,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-12 00:23:30,317 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:30,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1502437311, now seen corresponding path program 13 times [2020-09-12 00:23:30,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:30,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45660410] [2020-09-12 00:23:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:30,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45660410] [2020-09-12 00:23:30,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131383176] [2020-09-12 00:23:30,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-12 00:23:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:30,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:30,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-12 00:23:30,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [954478405] [2020-09-12 00:23:30,858 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:30,909 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:31,120 INFO L274 McrAutomatonBuilder]: Finished intersection with 127 states and 146 transitions. [2020-09-12 00:23:31,120 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:31,329 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [19632#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 19633#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:31,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-12 00:23:31,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:31,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-12 00:23:31,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-09-12 00:23:31,330 INFO L87 Difference]: Start difference. First operand 1027 states and 1378 transitions. Second operand 12 states. [2020-09-12 00:23:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:31,394 INFO L93 Difference]: Finished difference Result 1202 states and 1584 transitions. [2020-09-12 00:23:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-12 00:23:31,395 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 106 [2020-09-12 00:23:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:31,399 INFO L225 Difference]: With dead ends: 1202 [2020-09-12 00:23:31,400 INFO L226 Difference]: Without dead ends: 1202 [2020-09-12 00:23:31,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2020-09-12 00:23:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2020-09-12 00:23:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1156. [2020-09-12 00:23:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2020-09-12 00:23:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1534 transitions. [2020-09-12 00:23:31,421 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1534 transitions. Word has length 106 [2020-09-12 00:23:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:31,421 INFO L479 AbstractCegarLoop]: Abstraction has 1156 states and 1534 transitions. [2020-09-12 00:23:31,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-12 00:23:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1534 transitions. [2020-09-12 00:23:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-12 00:23:31,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:31,425 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:31,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-12 00:23:31,641 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:31,642 INFO L82 PathProgramCache]: Analyzing trace with hash 282598373, now seen corresponding path program 14 times [2020-09-12 00:23:31,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:31,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857119300] [2020-09-12 00:23:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:31,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857119300] [2020-09-12 00:23:31,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711418241] [2020-09-12 00:23:31,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:32,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-12 00:23:32,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:32,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-12 00:23:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:32,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:32,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-12 00:23:32,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1586157117] [2020-09-12 00:23:32,179 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:32,264 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:32,535 INFO L274 McrAutomatonBuilder]: Finished intersection with 133 states and 155 transitions. [2020-09-12 00:23:32,535 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:32,830 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [23483#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 23484#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:32,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-12 00:23:32,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:32,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-12 00:23:32,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-12 00:23:32,832 INFO L87 Difference]: Start difference. First operand 1156 states and 1534 transitions. Second operand 13 states. [2020-09-12 00:23:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:32,935 INFO L93 Difference]: Finished difference Result 1331 states and 1740 transitions. [2020-09-12 00:23:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-12 00:23:32,936 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 109 [2020-09-12 00:23:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:32,944 INFO L225 Difference]: With dead ends: 1331 [2020-09-12 00:23:32,944 INFO L226 Difference]: Without dead ends: 1331 [2020-09-12 00:23:32,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 141 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-12 00:23:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2020-09-12 00:23:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1285. [2020-09-12 00:23:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-09-12 00:23:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-09-12 00:23:32,982 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 109 [2020-09-12 00:23:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:32,982 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-09-12 00:23:32,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-12 00:23:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-09-12 00:23:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-12 00:23:32,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:32,988 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:33,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-12 00:23:33,202 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 15 times [2020-09-12 00:23:33,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:33,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280083420] [2020-09-12 00:23:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:33,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280083420] [2020-09-12 00:23:33,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938456562] [2020-09-12 00:23:33,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:33,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-12 00:23:33,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:33,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-12 00:23:33,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:33,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:33,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-12 00:23:33,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2104493813] [2020-09-12 00:23:33,862 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:33,904 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:34,129 INFO L274 McrAutomatonBuilder]: Finished intersection with 139 states and 164 transitions. [2020-09-12 00:23:34,130 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:34,488 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [27731#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 27732#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:34,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-12 00:23:34,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:34,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-12 00:23:34,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-09-12 00:23:34,489 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 14 states. [2020-09-12 00:23:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:34,579 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-09-12 00:23:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-12 00:23:34,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 112 [2020-09-12 00:23:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:34,587 INFO L225 Difference]: With dead ends: 1460 [2020-09-12 00:23:34,587 INFO L226 Difference]: Without dead ends: 1460 [2020-09-12 00:23:34,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 14 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2020-09-12 00:23:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-09-12 00:23:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-09-12 00:23:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-09-12 00:23:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-09-12 00:23:34,621 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-09-12 00:23:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:34,622 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-09-12 00:23:34,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-12 00:23:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-09-12 00:23:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-12 00:23:34,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:34,629 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:34,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:34,843 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 16 times [2020-09-12 00:23:34,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:34,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394818335] [2020-09-12 00:23:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:35,421 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-09-12 00:23:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:35,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394818335] [2020-09-12 00:23:35,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134508547] [2020-09-12 00:23:35,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:36,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-12 00:23:36,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:36,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-12 00:23:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:36,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:36,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-12 00:23:36,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [225168436] [2020-09-12 00:23:36,528 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:36,568 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:36,771 INFO L274 McrAutomatonBuilder]: Finished intersection with 145 states and 173 transitions. [2020-09-12 00:23:36,771 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:37,138 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [32376#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 32377#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:37,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-12 00:23:37,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-12 00:23:37,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2020-09-12 00:23:37,140 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 15 states. [2020-09-12 00:23:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:37,228 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-09-12 00:23:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-12 00:23:37,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2020-09-12 00:23:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:37,236 INFO L225 Difference]: With dead ends: 1589 [2020-09-12 00:23:37,236 INFO L226 Difference]: Without dead ends: 1589 [2020-09-12 00:23:37,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 16 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2020-09-12 00:23:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-09-12 00:23:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-09-12 00:23:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-12 00:23:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-09-12 00:23:37,279 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-09-12 00:23:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:37,279 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-09-12 00:23:37,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-12 00:23:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-09-12 00:23:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-12 00:23:37,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:37,287 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:37,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-12 00:23:37,500 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 17 times [2020-09-12 00:23:37,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:37,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218537356] [2020-09-12 00:23:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:37,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218537356] [2020-09-12 00:23:37,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909971905] [2020-09-12 00:23:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:38,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-12 00:23:38,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:38,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-12 00:23:38,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:38,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:38,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-12 00:23:38,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [945314897] [2020-09-12 00:23:38,267 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:38,311 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:38,629 INFO L274 McrAutomatonBuilder]: Finished intersection with 151 states and 182 transitions. [2020-09-12 00:23:38,629 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:38,990 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [37418#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 37419#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:38,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-12 00:23:38,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:38,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-12 00:23:38,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-09-12 00:23:38,991 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 16 states. [2020-09-12 00:23:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:39,096 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-09-12 00:23:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-12 00:23:39,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 118 [2020-09-12 00:23:39,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:39,104 INFO L225 Difference]: With dead ends: 1718 [2020-09-12 00:23:39,104 INFO L226 Difference]: Without dead ends: 1718 [2020-09-12 00:23:39,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 18 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-09-12 00:23:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-09-12 00:23:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-09-12 00:23:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-12 00:23:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-09-12 00:23:39,132 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-09-12 00:23:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:39,132 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-09-12 00:23:39,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-12 00:23:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-09-12 00:23:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-12 00:23:39,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:39,137 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:39,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:39,350 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:39,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 18 times [2020-09-12 00:23:39,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:39,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72629710] [2020-09-12 00:23:39,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:39,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72629710] [2020-09-12 00:23:39,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939922276] [2020-09-12 00:23:39,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:40,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-09-12 00:23:40,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-12 00:23:40,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:40,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:40,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-12 00:23:40,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1019954264] [2020-09-12 00:23:40,221 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:40,266 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:40,588 INFO L274 McrAutomatonBuilder]: Finished intersection with 157 states and 191 transitions. [2020-09-12 00:23:40,588 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:41,074 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [42857#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 42858#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:41,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-12 00:23:41,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:41,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-12 00:23:41,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2020-09-12 00:23:41,075 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 17 states. [2020-09-12 00:23:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:41,191 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-09-12 00:23:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-12 00:23:41,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 121 [2020-09-12 00:23:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:41,201 INFO L225 Difference]: With dead ends: 1847 [2020-09-12 00:23:41,201 INFO L226 Difference]: Without dead ends: 1847 [2020-09-12 00:23:41,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 169 SyntacticMatches, 20 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2020-09-12 00:23:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-09-12 00:23:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-09-12 00:23:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-09-12 00:23:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-09-12 00:23:41,229 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-09-12 00:23:41,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:41,230 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-09-12 00:23:41,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-12 00:23:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-09-12 00:23:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-12 00:23:41,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:41,235 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:41,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:41,448 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 19 times [2020-09-12 00:23:41,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:41,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360015247] [2020-09-12 00:23:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:41,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360015247] [2020-09-12 00:23:41,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674114522] [2020-09-12 00:23:41,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:41,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-12 00:23:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:41,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:41,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-12 00:23:41,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1900582823] [2020-09-12 00:23:41,980 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:42,030 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:42,400 INFO L274 McrAutomatonBuilder]: Finished intersection with 163 states and 200 transitions. [2020-09-12 00:23:42,401 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:42,972 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [48693#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 48694#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:42,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-12 00:23:42,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:42,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-12 00:23:42,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2020-09-12 00:23:42,973 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 18 states. [2020-09-12 00:23:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:43,070 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-09-12 00:23:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-12 00:23:43,071 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 124 [2020-09-12 00:23:43,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:43,079 INFO L225 Difference]: With dead ends: 1976 [2020-09-12 00:23:43,079 INFO L226 Difference]: Without dead ends: 1976 [2020-09-12 00:23:43,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 22 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2020-09-12 00:23:43,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-09-12 00:23:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-09-12 00:23:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-09-12 00:23:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-09-12 00:23:43,113 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-09-12 00:23:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:43,113 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-09-12 00:23:43,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-12 00:23:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-09-12 00:23:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-12 00:23:43,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:43,119 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:43,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-12 00:23:43,332 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 20 times [2020-09-12 00:23:43,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:43,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275788447] [2020-09-12 00:23:43,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:43,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275788447] [2020-09-12 00:23:43,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263861688] [2020-09-12 00:23:43,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:43,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-12 00:23:43,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:43,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-12 00:23:43,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:43,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:43,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-12 00:23:43,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1764383731] [2020-09-12 00:23:43,937 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:44,009 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:44,272 INFO L274 McrAutomatonBuilder]: Finished intersection with 169 states and 209 transitions. [2020-09-12 00:23:44,272 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:44,897 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [54926#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 54927#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:44,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-12 00:23:44,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-12 00:23:44,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2020-09-12 00:23:44,899 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 19 states. [2020-09-12 00:23:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:45,050 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-09-12 00:23:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-12 00:23:45,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 127 [2020-09-12 00:23:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:45,059 INFO L225 Difference]: With dead ends: 2105 [2020-09-12 00:23:45,059 INFO L226 Difference]: Without dead ends: 2105 [2020-09-12 00:23:45,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 183 SyntacticMatches, 24 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2020-09-12 00:23:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-09-12 00:23:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-09-12 00:23:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-09-12 00:23:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-09-12 00:23:45,095 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-09-12 00:23:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:45,096 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-09-12 00:23:45,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-12 00:23:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-09-12 00:23:45,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-12 00:23:45,102 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:45,103 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:45,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:45,317 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 21 times [2020-09-12 00:23:45,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:45,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093307770] [2020-09-12 00:23:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:45,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093307770] [2020-09-12 00:23:45,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298205837] [2020-09-12 00:23:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:46,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-12 00:23:46,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-12 00:23:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:46,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:46,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-12 00:23:46,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1824237987] [2020-09-12 00:23:46,384 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:46,527 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:46,846 INFO L274 McrAutomatonBuilder]: Finished intersection with 175 states and 218 transitions. [2020-09-12 00:23:46,847 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:47,507 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [61556#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 61557#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:47,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-12 00:23:47,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:47,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-12 00:23:47,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=219, Unknown=0, NotChecked=0, Total=380 [2020-09-12 00:23:47,508 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 20 states. [2020-09-12 00:23:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:47,639 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-09-12 00:23:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-12 00:23:47,640 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 130 [2020-09-12 00:23:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:47,648 INFO L225 Difference]: With dead ends: 2234 [2020-09-12 00:23:47,648 INFO L226 Difference]: Without dead ends: 2234 [2020-09-12 00:23:47,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 190 SyntacticMatches, 26 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=219, Unknown=0, NotChecked=0, Total=380 [2020-09-12 00:23:47,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-12 00:23:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-09-12 00:23:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-12 00:23:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-09-12 00:23:47,675 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-09-12 00:23:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:47,675 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-09-12 00:23:47,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-12 00:23:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-09-12 00:23:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-12 00:23:47,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:47,680 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:47,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-12 00:23:47,894 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:47,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:47,895 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 22 times [2020-09-12 00:23:47,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:47,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823194595] [2020-09-12 00:23:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:48,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823194595] [2020-09-12 00:23:48,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562897939] [2020-09-12 00:23:48,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:49,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-12 00:23:49,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:49,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-12 00:23:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:49,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:49,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-12 00:23:49,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [173064406] [2020-09-12 00:23:49,658 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:49,727 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:50,173 INFO L274 McrAutomatonBuilder]: Finished intersection with 181 states and 227 transitions. [2020-09-12 00:23:50,174 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:50,885 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [68583#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 68584#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:50,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-12 00:23:50,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-12 00:23:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=241, Unknown=0, NotChecked=0, Total=420 [2020-09-12 00:23:50,886 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 21 states. [2020-09-12 00:23:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:51,007 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-09-12 00:23:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-12 00:23:51,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 133 [2020-09-12 00:23:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:51,016 INFO L225 Difference]: With dead ends: 2363 [2020-09-12 00:23:51,016 INFO L226 Difference]: Without dead ends: 2363 [2020-09-12 00:23:51,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 197 SyntacticMatches, 28 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=241, Unknown=0, NotChecked=0, Total=420 [2020-09-12 00:23:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-09-12 00:23:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-09-12 00:23:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-09-12 00:23:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-09-12 00:23:51,044 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-09-12 00:23:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:51,045 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-09-12 00:23:51,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-12 00:23:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-09-12 00:23:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-12 00:23:51,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:51,050 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:51,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-12 00:23:51,265 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 23 times [2020-09-12 00:23:51,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:51,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288581328] [2020-09-12 00:23:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:51,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288581328] [2020-09-12 00:23:51,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959802849] [2020-09-12 00:23:51,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:52,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-12 00:23:52,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:52,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-12 00:23:52,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:52,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:52,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-12 00:23:52,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2030778140] [2020-09-12 00:23:52,078 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:52,115 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:52,589 INFO L274 McrAutomatonBuilder]: Finished intersection with 187 states and 236 transitions. [2020-09-12 00:23:52,589 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:53,376 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [76007#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 76008#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:23:53,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-12 00:23:53,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-12 00:23:53,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2020-09-12 00:23:53,377 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 22 states. [2020-09-12 00:23:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:53,508 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-09-12 00:23:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-12 00:23:53,508 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-09-12 00:23:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:53,516 INFO L225 Difference]: With dead ends: 2492 [2020-09-12 00:23:53,516 INFO L226 Difference]: Without dead ends: 2492 [2020-09-12 00:23:53,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 204 SyntacticMatches, 30 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2020-09-12 00:23:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-12 00:23:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-09-12 00:23:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-09-12 00:23:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-09-12 00:23:53,545 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-09-12 00:23:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:53,546 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-09-12 00:23:53,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-12 00:23:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-09-12 00:23:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-12 00:23:53,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:53,551 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:53,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:53,764 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:53,765 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 24 times [2020-09-12 00:23:53,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:53,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200829193] [2020-09-12 00:23:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:54,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200829193] [2020-09-12 00:23:54,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10044052] [2020-09-12 00:23:54,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:54,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-12 00:23:54,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:23:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-12 00:23:54,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:54,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:54,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-12 00:23:54,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [160353879] [2020-09-12 00:23:54,867 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:54,925 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:55,786 INFO L274 McrAutomatonBuilder]: Finished intersection with 193 states and 245 transitions. [2020-09-12 00:23:55,786 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:56,641 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [83829#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0)), 83828#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-09-12 00:23:56,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-12 00:23:56,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:56,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-12 00:23:56,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2020-09-12 00:23:56,643 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 23 states. [2020-09-12 00:23:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:56,782 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-09-12 00:23:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-12 00:23:56,782 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-09-12 00:23:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:56,793 INFO L225 Difference]: With dead ends: 2621 [2020-09-12 00:23:56,793 INFO L226 Difference]: Without dead ends: 2621 [2020-09-12 00:23:56,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 211 SyntacticMatches, 32 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2020-09-12 00:23:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-09-12 00:23:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-09-12 00:23:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-09-12 00:23:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-09-12 00:23:56,825 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-09-12 00:23:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:56,825 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-09-12 00:23:56,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-12 00:23:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-09-12 00:23:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-12 00:23:56,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:56,830 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:57,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-12 00:23:57,043 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:57,044 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 25 times [2020-09-12 00:23:57,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:57,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515923199] [2020-09-12 00:23:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:57,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515923199] [2020-09-12 00:23:57,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190907483] [2020-09-12 00:23:57,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:23:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:23:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-12 00:23:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:23:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:23:57,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:23:57,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-12 00:23:57,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2012086221] [2020-09-12 00:23:57,756 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:23:57,796 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:23:58,334 INFO L274 McrAutomatonBuilder]: Finished intersection with 199 states and 254 transitions. [2020-09-12 00:23:58,334 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:23:59,212 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [92047#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0)), 92046#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1))] [2020-09-12 00:23:59,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-12 00:23:59,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:23:59,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-12 00:23:59,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=313, Unknown=0, NotChecked=0, Total=552 [2020-09-12 00:23:59,213 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 24 states. [2020-09-12 00:23:59,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:23:59,322 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-09-12 00:23:59,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-12 00:23:59,323 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 142 [2020-09-12 00:23:59,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:23:59,330 INFO L225 Difference]: With dead ends: 2750 [2020-09-12 00:23:59,331 INFO L226 Difference]: Without dead ends: 2750 [2020-09-12 00:23:59,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 218 SyntacticMatches, 34 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=313, Unknown=0, NotChecked=0, Total=552 [2020-09-12 00:23:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-09-12 00:23:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-09-12 00:23:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-09-12 00:23:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-09-12 00:23:59,364 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-09-12 00:23:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:23:59,364 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-09-12 00:23:59,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-12 00:23:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-09-12 00:23:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-12 00:23:59,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:23:59,369 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:23:59,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:23:59,583 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:23:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:23:59,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 26 times [2020-09-12 00:23:59,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:23:59,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069724857] [2020-09-12 00:23:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:23:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:24:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:24:00,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069724857] [2020-09-12 00:24:00,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471551645] [2020-09-12 00:24:00,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:24:00,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-12 00:24:00,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:24:00,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-12 00:24:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:24:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-12 00:24:00,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:24:00,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-12 00:24:00,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [811145250] [2020-09-12 00:24:00,313 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:24:00,355 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:24:00,961 INFO L274 McrAutomatonBuilder]: Finished intersection with 205 states and 263 transitions. [2020-09-12 00:24:00,961 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:24:01,918 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [100661#(or (= ULTIMATE.start_main_~i~1 0) (<= 20 ULTIMATE.start_main_~i~1)), 100662#(or (<= 20 ULTIMATE.start_main_~i~1) (<= ULTIMATE.start_main_~i~1 0))] [2020-09-12 00:24:01,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-12 00:24:01,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:24:01,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-12 00:24:01,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=339, Unknown=0, NotChecked=0, Total=600 [2020-09-12 00:24:01,919 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 25 states. [2020-09-12 00:24:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:24:02,031 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-09-12 00:24:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-12 00:24:02,032 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 145 [2020-09-12 00:24:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:24:02,036 INFO L225 Difference]: With dead ends: 2833 [2020-09-12 00:24:02,037 INFO L226 Difference]: Without dead ends: 2833 [2020-09-12 00:24:02,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 225 SyntacticMatches, 36 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=339, Unknown=0, NotChecked=0, Total=600 [2020-09-12 00:24:02,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-09-12 00:24:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-09-12 00:24:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-12 00:24:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-09-12 00:24:02,069 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-09-12 00:24:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:24:02,069 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-09-12 00:24:02,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-12 00:24:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-09-12 00:24:02,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-12 00:24:02,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:24:02,073 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:24:02,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-12 00:24:02,274 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:24:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:24:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 27 times [2020-09-12 00:24:02,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:24:02,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630019576] [2020-09-12 00:24:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:24:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:24:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-12 00:24:05,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630019576] [2020-09-12 00:24:05,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895493247] [2020-09-12 00:24:05,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:24:06,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-12 00:24:06,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:24:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-12 00:24:06,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:24:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-12 00:24:06,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:24:06,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-12 00:24:06,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [216813049] [2020-09-12 00:24:06,746 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:24:06,815 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:24:08,584 INFO L274 McrAutomatonBuilder]: Finished intersection with 211 states and 272 transitions. [2020-09-12 00:24:08,584 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:24:09,093 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-12 00:24:09,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-12 00:24:09,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:24:09,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-12 00:24:09,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-12 00:24:09,096 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-09-12 00:25:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-12 00:25:46,716 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-09-12 00:25:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-09-12 00:25:46,718 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-12 00:25:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-12 00:25:46,784 INFO L225 Difference]: With dead ends: 32926 [2020-09-12 00:25:46,784 INFO L226 Difference]: Without dead ends: 32924 [2020-09-12 00:25:46,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 265 SyntacticMatches, 6 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-09-12 00:25:46,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-09-12 00:25:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-09-12 00:25:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-09-12 00:25:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-09-12 00:25:47,140 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-09-12 00:25:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-12 00:25:47,140 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-09-12 00:25:47,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-12 00:25:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-09-12 00:25:47,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-12 00:25:47,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-12 00:25:47,145 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-12 00:25:47,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-12 00:25:47,361 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-12 00:25:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-12 00:25:47,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 28 times [2020-09-12 00:25:47,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-12 00:25:47,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314599223] [2020-09-12 00:25:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-12 00:25:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-12 00:25:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-12 00:25:51,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314599223] [2020-09-12 00:25:51,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015194287] [2020-09-12 00:25:51,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-12 00:25:53,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-12 00:25:53,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-12 00:25:53,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-12 00:25:53,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-12 00:25:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-12 00:25:53,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-12 00:25:53,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-12 00:25:53,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1058431148] [2020-09-12 00:25:53,421 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-12 00:25:53,467 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-12 00:25:53,918 INFO L274 McrAutomatonBuilder]: Finished intersection with 208 states and 266 transitions. [2020-09-12 00:25:53,919 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-12 00:25:54,507 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-12 00:25:54,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-12 00:25:54,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-12 00:25:54,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-12 00:25:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-12 00:25:54,509 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. Received shutdown request... [2020-09-12 00:26:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2020-09-12 00:26:46,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-12 00:26:46,987 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-12 00:26:46,993 WARN L228 ceAbstractionStarter]: Timeout [2020-09-12 00:26:46,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 12:26:46 BasicIcfg [2020-09-12 00:26:46,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-12 00:26:46,996 INFO L168 Benchmark]: Toolchain (without parser) took 222516.66 ms. Allocated memory was 140.5 MB in the beginning and 2.7 GB in the end (delta: 2.6 GB). Free memory was 101.6 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 885.5 MB. Max. memory is 7.1 GB. [2020-09-12 00:26:46,996 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-12 00:26:46,997 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1102.84 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 101.0 MB in the beginning and 107.0 MB in the end (delta: -6.1 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB. [2020-09-12 00:26:46,997 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.35 ms. Allocated memory is still 204.5 MB. Free memory was 107.0 MB in the beginning and 104.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-12 00:26:46,997 INFO L168 Benchmark]: Boogie Preprocessor took 41.04 ms. Allocated memory is still 204.5 MB. Free memory was 104.3 MB in the beginning and 102.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-12 00:26:46,998 INFO L168 Benchmark]: RCFGBuilder took 568.49 ms. Allocated memory was 204.5 MB in the beginning and 236.5 MB in the end (delta: 32.0 MB). Free memory was 102.3 MB in the beginning and 192.7 MB in the end (delta: -90.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-09-12 00:26:46,998 INFO L168 Benchmark]: TraceAbstraction took 220714.00 ms. Allocated memory was 236.5 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 191.2 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 879.2 MB. Max. memory is 7.1 GB. [2020-09-12 00:26:47,000 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1102.84 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 101.0 MB in the beginning and 107.0 MB in the end (delta: -6.1 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 81.35 ms. Allocated memory is still 204.5 MB. Free memory was 107.0 MB in the beginning and 104.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.04 ms. Allocated memory is still 204.5 MB. Free memory was 104.3 MB in the beginning and 102.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 568.49 ms. Allocated memory was 204.5 MB in the beginning and 236.5 MB in the end (delta: 32.0 MB). Free memory was 102.3 MB in the beginning and 192.7 MB in the end (delta: -90.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220714.00 ms. Allocated memory was 236.5 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 191.2 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 879.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.0s, 78 ProgramPointsBefore, 19 ProgramPointsAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 317 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 738 CheckedPairsTotal, 70 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (2967states) and FLOYD_HOARE automaton (currently 326 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (10181 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 220.5s, OverallIterations: 30, TraceHistogramMax: 20, AutomataDifference: 162.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 3894 SDtfs, 8308 SDslu, 201025 SDs, 0 SdLazy, 117248 SolverSat, 1682 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6068 GetRequests, 4126 SyntacticMatches, 351 SemanticMatches, 1591 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223634 ImplicationChecksByTransitivity, 77.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2967occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 29 MinimizatonAttempts, 30671 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 9.2s SatisfiabilityAnalysisTime, 15.7s InterpolantComputationTime, 5382 NumberOfCodeBlocks, 5140 NumberOfCodeBlocksAsserted, 249 NumberOfCheckSat, 5325 ConstructedInterpolants, 0 QuantifiedInterpolants, 2083607 SizeOfPredicates, 105 NumberOfNonLiveVariables, 9767 ConjunctsInSsa, 625 ConjunctsInUnsatCore, 57 InterpolantComputations, 3 PerfectInterpolantSequences, 23401/39516 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown