/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-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 15:03:58,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 15:03:58,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 15:03:58,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 15:03:58,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 15:03:58,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 15:03:58,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 15:03:58,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 15:03:58,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 15:03:58,917 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 15:03:58,918 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 15:03:58,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 15:03:58,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 15:03:58,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 15:03:58,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 15:03:58,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 15:03:58,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 15:03:58,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 15:03:58,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 15:03:58,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 15:03:58,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 15:03:58,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 15:03:58,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 15:03:58,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 15:03:58,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-17 15:03:58,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 15:03:58,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 15:03:58,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 15:03:58,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-17 15:03:58,979 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 15:03:58,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 15:03:58,983 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 15:03:58,983 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 15:03:58,983 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 15:03:58,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 15:03:58,983 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 15:03:58,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 15:03:58,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 15:03:58,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 15:03:58,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 15:03:58,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 15:03:58,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 15:03:58,986 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 15:03:58,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 15:03:58,986 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 15:03:58,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 15:03:58,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 15:03:58,987 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 15:03:58,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 15:03:58,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 15:03:58,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 15:03:58,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 15:03:58,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 15:03:58,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 15:03:58,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 15:03:58,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 15:03:58,989 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-17 15:03:58,989 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 15:03:58,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 15:03:58,990 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-17 15:03:59,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 15:03:59,487 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 15:03:59,492 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 15:03:59,494 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 15:03:59,495 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 15:03:59,497 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2020-09-17 15:03:59,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/067852517/858906af55454f69bc6b6140d593d1b1/FLAG8b744735e [2020-09-17 15:04:00,149 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 15:04:00,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2020-09-17 15:04:00,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/067852517/858906af55454f69bc6b6140d593d1b1/FLAG8b744735e [2020-09-17 15:04:00,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/067852517/858906af55454f69bc6b6140d593d1b1 [2020-09-17 15:04:00,430 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 15:04:00,437 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 15:04:00,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 15:04:00,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 15:04:00,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 15:04:00,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 03:04:00" (1/1) ... [2020-09-17 15:04:00,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c3b0b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:00, skipping insertion in model container [2020-09-17 15:04:00,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 03:04:00" (1/1) ... [2020-09-17 15:04:00,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 15:04:00,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 15:04:01,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 15:04:01,026 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 15:04:01,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 15:04:01,185 INFO L208 MainTranslator]: Completed translation [2020-09-17 15:04:01,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01 WrapperNode [2020-09-17 15:04:01,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 15:04:01,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 15:04:01,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 15:04:01,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 15:04:01,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... [2020-09-17 15:04:01,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... [2020-09-17 15:04:01,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 15:04:01,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 15:04:01,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 15:04:01,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 15:04:01,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... [2020-09-17 15:04:01,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... [2020-09-17 15:04:01,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... [2020-09-17 15:04:01,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... [2020-09-17 15:04:01,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... [2020-09-17 15:04:01,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... [2020-09-17 15:04:01,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... [2020-09-17 15:04:01,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 15:04:01,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 15:04:01,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 15:04:01,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 15:04:01,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 15:04:01,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-17 15:04:01,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 15:04:01,365 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2020-09-17 15:04:01,365 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2020-09-17 15:04:01,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 15:04:01,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 15:04:01,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 15:04:01,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 15:04:01,366 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2020-09-17 15:04:01,366 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2020-09-17 15:04:01,369 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 15:04:01,912 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 15:04:01,912 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-17 15:04:01,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 03:04:01 BoogieIcfgContainer [2020-09-17 15:04:01,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 15:04:01,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 15:04:01,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 15:04:01,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 15:04:01,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 03:04:00" (1/3) ... [2020-09-17 15:04:01,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514c4fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 03:04:01, skipping insertion in model container [2020-09-17 15:04:01,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 03:04:01" (2/3) ... [2020-09-17 15:04:01,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514c4fd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 03:04:01, skipping insertion in model container [2020-09-17 15:04:01,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 03:04:01" (3/3) ... [2020-09-17 15:04:01,935 INFO L109 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2020-09-17 15:04:01,947 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 15:04:01,948 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 15:04:01,958 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 15:04:01,960 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 15:04:01,995 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,995 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,995 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,996 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,996 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,996 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,997 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,997 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,997 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,998 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,998 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,998 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,999 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:01,999 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,000 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,000 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,000 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,001 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,001 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,001 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,001 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,002 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,002 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,003 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,003 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,003 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,004 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,004 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,004 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,004 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,004 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,005 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,005 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,005 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,006 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,006 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,006 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,006 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,007 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,007 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,007 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,007 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,012 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,013 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,013 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,013 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,013 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,014 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,023 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,023 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,023 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,024 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,024 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,024 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,024 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,035 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,036 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,036 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,036 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,037 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,037 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,040 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,041 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,043 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,043 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,043 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,044 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,044 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 15:04:02,107 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-09-17 15:04:02,143 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 15:04:02,143 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 15:04:02,143 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 15:04:02,143 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-17 15:04:02,143 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 15:04:02,144 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 15:04:02,144 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 15:04:02,144 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 15:04:02,181 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 102 transitions, 272 flow [2020-09-17 15:04:02,184 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 102 transitions, 272 flow [2020-09-17 15:04:02,320 INFO L129 PetriNetUnfolder]: 19/136 cut-off events. [2020-09-17 15:04:02,320 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-09-17 15:04:02,333 INFO L80 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 136 events. 19/136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 329 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2020-09-17 15:04:02,341 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 102 transitions, 272 flow [2020-09-17 15:04:02,410 INFO L129 PetriNetUnfolder]: 19/136 cut-off events. [2020-09-17 15:04:02,410 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-09-17 15:04:02,414 INFO L80 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 136 events. 19/136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 329 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2020-09-17 15:04:02,421 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2626 [2020-09-17 15:04:02,423 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 15:04:03,592 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-09-17 15:04:03,945 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-09-17 15:04:04,065 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-09-17 15:04:04,091 INFO L206 etLargeBlockEncoding]: Checked pairs total: 8607 [2020-09-17 15:04:04,091 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-17 15:04:04,096 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 59 transitions, 186 flow [2020-09-17 15:04:04,592 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 5928 states. [2020-09-17 15:04:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states. [2020-09-17 15:04:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 15:04:04,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:04,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:04,608 INFO L427 AbstractCegarLoop]: === Iteration 1 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-17 15:04:04,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1320505735, now seen corresponding path program 1 times [2020-09-17 15:04:04,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:04,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598791748] [2020-09-17 15:04:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:04,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598791748] [2020-09-17 15:04:04,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 15:04:04,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 15:04:04,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1946127317] [2020-09-17 15:04:04,910 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:04,914 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:04,932 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-17 15:04:04,933 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:04,935 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 15:04:04,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 15:04:04,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:04,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 15:04:04,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 15:04:04,960 INFO L87 Difference]: Start difference. First operand 5928 states. Second operand 4 states. [2020-09-17 15:04:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:05,217 INFO L93 Difference]: Finished difference Result 11925 states and 39965 transitions. [2020-09-17 15:04:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 15:04:05,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-09-17 15:04:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:05,314 INFO L225 Difference]: With dead ends: 11925 [2020-09-17 15:04:05,315 INFO L226 Difference]: Without dead ends: 8145 [2020-09-17 15:04:05,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 15:04:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2020-09-17 15:04:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 5365. [2020-09-17 15:04:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5365 states. [2020-09-17 15:04:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5365 states to 5365 states and 18240 transitions. [2020-09-17 15:04:05,747 INFO L78 Accepts]: Start accepts. Automaton has 5365 states and 18240 transitions. Word has length 8 [2020-09-17 15:04:05,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:05,748 INFO L479 AbstractCegarLoop]: Abstraction has 5365 states and 18240 transitions. [2020-09-17 15:04:05,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 15:04:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5365 states and 18240 transitions. [2020-09-17 15:04:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 15:04:05,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:05,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:05,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 15:04:05,751 INFO L427 AbstractCegarLoop]: === Iteration 2 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-17 15:04:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash 549618854, now seen corresponding path program 1 times [2020-09-17 15:04:05,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:05,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46663070] [2020-09-17 15:04:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:05,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46663070] [2020-09-17 15:04:05,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 15:04:05,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 15:04:05,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1176998157] [2020-09-17 15:04:05,841 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:05,842 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:05,845 INFO L274 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2020-09-17 15:04:05,845 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:05,864 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 15:04:05,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 15:04:05,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 15:04:05,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 15:04:05,867 INFO L87 Difference]: Start difference. First operand 5365 states and 18240 transitions. Second operand 3 states. [2020-09-17 15:04:05,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:05,943 INFO L93 Difference]: Finished difference Result 4584 states and 13790 transitions. [2020-09-17 15:04:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 15:04:05,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-17 15:04:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:05,979 INFO L225 Difference]: With dead ends: 4584 [2020-09-17 15:04:05,980 INFO L226 Difference]: Without dead ends: 4532 [2020-09-17 15:04:05,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 15:04:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2020-09-17 15:04:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 4532. [2020-09-17 15:04:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4532 states. [2020-09-17 15:04:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4532 states to 4532 states and 13652 transitions. [2020-09-17 15:04:06,143 INFO L78 Accepts]: Start accepts. Automaton has 4532 states and 13652 transitions. Word has length 10 [2020-09-17 15:04:06,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:06,143 INFO L479 AbstractCegarLoop]: Abstraction has 4532 states and 13652 transitions. [2020-09-17 15:04:06,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 15:04:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4532 states and 13652 transitions. [2020-09-17 15:04:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 15:04:06,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:06,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:06,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 15:04:06,146 INFO L427 AbstractCegarLoop]: === Iteration 3 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-17 15:04:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1990636334, now seen corresponding path program 2 times [2020-09-17 15:04:06,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:06,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121262372] [2020-09-17 15:04:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:06,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121262372] [2020-09-17 15:04:06,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 15:04:06,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 15:04:06,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [828855839] [2020-09-17 15:04:06,217 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:06,218 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:06,220 INFO L274 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2020-09-17 15:04:06,220 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:06,222 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 15:04:06,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 15:04:06,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:06,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 15:04:06,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 15:04:06,224 INFO L87 Difference]: Start difference. First operand 4532 states and 13652 transitions. Second operand 4 states. [2020-09-17 15:04:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:06,407 INFO L93 Difference]: Finished difference Result 3000 states and 7221 transitions. [2020-09-17 15:04:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-17 15:04:06,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-09-17 15:04:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:06,444 INFO L225 Difference]: With dead ends: 3000 [2020-09-17 15:04:06,444 INFO L226 Difference]: Without dead ends: 2844 [2020-09-17 15:04:06,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 15:04:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2020-09-17 15:04:06,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2436. [2020-09-17 15:04:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2436 states. [2020-09-17 15:04:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 6018 transitions. [2020-09-17 15:04:06,548 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 6018 transitions. Word has length 10 [2020-09-17 15:04:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:06,548 INFO L479 AbstractCegarLoop]: Abstraction has 2436 states and 6018 transitions. [2020-09-17 15:04:06,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 15:04:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 6018 transitions. [2020-09-17 15:04:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 15:04:06,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:06,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:06,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 15:04:06,557 INFO L427 AbstractCegarLoop]: === Iteration 4 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-17 15:04:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:06,557 INFO L82 PathProgramCache]: Analyzing trace with hash -670514015, now seen corresponding path program 1 times [2020-09-17 15:04:06,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:06,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207024230] [2020-09-17 15:04:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:06,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207024230] [2020-09-17 15:04:06,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 15:04:06,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 15:04:06,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [801616532] [2020-09-17 15:04:06,672 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:06,673 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:06,680 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 12 transitions. [2020-09-17 15:04:06,680 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:06,680 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-17 15:04:06,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 15:04:06,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:06,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 15:04:06,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 15:04:06,682 INFO L87 Difference]: Start difference. First operand 2436 states and 6018 transitions. Second operand 4 states. [2020-09-17 15:04:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:06,757 INFO L93 Difference]: Finished difference Result 2639 states and 6454 transitions. [2020-09-17 15:04:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 15:04:06,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-17 15:04:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:06,763 INFO L225 Difference]: With dead ends: 2639 [2020-09-17 15:04:06,763 INFO L226 Difference]: Without dead ends: 1900 [2020-09-17 15:04:06,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 15:04:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-09-17 15:04:06,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1546. [2020-09-17 15:04:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-09-17 15:04:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3824 transitions. [2020-09-17 15:04:06,806 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3824 transitions. Word has length 12 [2020-09-17 15:04:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:06,808 INFO L479 AbstractCegarLoop]: Abstraction has 1546 states and 3824 transitions. [2020-09-17 15:04:06,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 15:04:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3824 transitions. [2020-09-17 15:04:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 15:04:06,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:06,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:06,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-17 15:04:06,811 INFO L427 AbstractCegarLoop]: === Iteration 5 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-17 15:04:06,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:06,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1513944994, now seen corresponding path program 1 times [2020-09-17 15:04:06,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:06,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731055405] [2020-09-17 15:04:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:06,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731055405] [2020-09-17 15:04:06,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 15:04:06,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-17 15:04:06,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [348347110] [2020-09-17 15:04:06,923 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:06,926 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:06,937 INFO L274 McrAutomatonBuilder]: Finished intersection with 47 states and 71 transitions. [2020-09-17 15:04:06,937 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:07,079 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61891#(<= 0 ~r~0)] [2020-09-17 15:04:07,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 15:04:07,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:07,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 15:04:07,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-17 15:04:07,080 INFO L87 Difference]: Start difference. First operand 1546 states and 3824 transitions. Second operand 7 states. [2020-09-17 15:04:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:07,203 INFO L93 Difference]: Finished difference Result 1795 states and 4395 transitions. [2020-09-17 15:04:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 15:04:07,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-17 15:04:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:07,208 INFO L225 Difference]: With dead ends: 1795 [2020-09-17 15:04:07,209 INFO L226 Difference]: Without dead ends: 1642 [2020-09-17 15:04:07,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-17 15:04:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-09-17 15:04:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1510. [2020-09-17 15:04:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1510 states. [2020-09-17 15:04:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 3689 transitions. [2020-09-17 15:04:07,252 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 3689 transitions. Word has length 20 [2020-09-17 15:04:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:07,253 INFO L479 AbstractCegarLoop]: Abstraction has 1510 states and 3689 transitions. [2020-09-17 15:04:07,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 15:04:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 3689 transitions. [2020-09-17 15:04:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 15:04:07,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:07,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:07,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-17 15:04:07,255 INFO L427 AbstractCegarLoop]: === Iteration 6 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-17 15:04:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:07,256 INFO L82 PathProgramCache]: Analyzing trace with hash 451095645, now seen corresponding path program 1 times [2020-09-17 15:04:07,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:07,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827242820] [2020-09-17 15:04:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 15:04:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 15:04:07,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827242820] [2020-09-17 15:04:07,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 15:04:07,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-17 15:04:07,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1104113232] [2020-09-17 15:04:07,332 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-17 15:04:07,335 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-17 15:04:07,344 INFO L274 McrAutomatonBuilder]: Finished intersection with 53 states and 78 transitions. [2020-09-17 15:04:07,344 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-17 15:04:07,389 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66717#(<= 0 ~r~0)] [2020-09-17 15:04:07,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 15:04:07,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 15:04:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 15:04:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-17 15:04:07,391 INFO L87 Difference]: Start difference. First operand 1510 states and 3689 transitions. Second operand 7 states. [2020-09-17 15:04:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 15:04:07,568 INFO L93 Difference]: Finished difference Result 1759 states and 4260 transitions. [2020-09-17 15:04:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 15:04:07,569 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-17 15:04:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 15:04:07,573 INFO L225 Difference]: With dead ends: 1759 [2020-09-17 15:04:07,573 INFO L226 Difference]: Without dead ends: 1498 [2020-09-17 15:04:07,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-17 15:04:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-09-17 15:04:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1366. [2020-09-17 15:04:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1366 states. [2020-09-17 15:04:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 3257 transitions. [2020-09-17 15:04:07,612 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 3257 transitions. Word has length 20 [2020-09-17 15:04:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 15:04:07,612 INFO L479 AbstractCegarLoop]: Abstraction has 1366 states and 3257 transitions. [2020-09-17 15:04:07,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 15:04:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 3257 transitions. [2020-09-17 15:04:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 15:04:07,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 15:04:07,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 15:04:07,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-17 15:04:07,615 INFO L427 AbstractCegarLoop]: === Iteration 7 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-17 15:04:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 15:04:07,615 INFO L82 PathProgramCache]: Analyzing trace with hash -875832079, now seen corresponding path program 2 times [2020-09-17 15:04:07,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 15:04:07,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109127121] [2020-09-17 15:04:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 15:04:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-17 15:04:07,634 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-17 15:04:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-17 15:04:07,649 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-17 15:04:07,681 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-17 15:04:07,682 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-17 15:04:07,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-17 15:04:07,683 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-17 15:04:07,692 WARN L123 codingBacktranslator]: Skipped backtranslation of ATE [287] [287] L697-->L697-3: Formula: (= ~y~0_In1628983906 ~x~0_In1628983906) InVars {~y~0=~y~0_In1628983906, ~x~0=~x~0_In1628983906} OutVars{~y~0=~y~0_In1628983906, ~x~0=~x~0_In1628983906} AuxVars[] AssignedVars[] because there is no mapped edge [2020-09-17 15:04:07,698 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-09-17 15:04:07,699 WARN L224 RCFGBacktranslator]: unable to determine which branch was taken at C: __VERIFIER_atomic_take_read_lock() [694] [2020-09-17 15:04:07,700 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-09-17 15:04:07,701 WARN L224 RCFGBacktranslator]: unable to determine which branch was taken at C: __VERIFIER_atomic_take_read_lock() [694] [2020-09-17 15:04:07,701 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-09-17 15:04:07,701 WARN L224 RCFGBacktranslator]: unable to determine which branch was taken at C: __VERIFIER_atomic_take_write_lock() [687] [2020-09-17 15:04:07,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 03:04:07 BasicIcfg [2020-09-17 15:04:07,739 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-17 15:04:07,743 INFO L168 Benchmark]: Toolchain (without parser) took 7309.74 ms. Allocated memory was 147.3 MB in the beginning and 354.9 MB in the end (delta: 207.6 MB). Free memory was 102.3 MB in the beginning and 222.6 MB in the end (delta: -120.3 MB). Peak memory consumption was 87.3 MB. Max. memory is 7.1 GB. [2020-09-17 15:04:07,744 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-17 15:04:07,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 747.97 ms. Allocated memory was 147.3 MB in the beginning and 205.5 MB in the end (delta: 58.2 MB). Free memory was 101.6 MB in the beginning and 165.4 MB in the end (delta: -63.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-09-17 15:04:07,749 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.61 ms. Allocated memory is still 205.5 MB. Free memory was 165.4 MB in the beginning and 162.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-17 15:04:07,749 INFO L168 Benchmark]: Boogie Preprocessor took 31.91 ms. Allocated memory is still 205.5 MB. Free memory was 162.8 MB in the beginning and 161.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-17 15:04:07,750 INFO L168 Benchmark]: RCFGBuilder took 633.31 ms. Allocated memory is still 205.5 MB. Free memory was 161.5 MB in the beginning and 129.4 MB in the end (delta: 32.1 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. [2020-09-17 15:04:07,754 INFO L168 Benchmark]: TraceAbstraction took 5817.18 ms. Allocated memory was 205.5 MB in the beginning and 354.9 MB in the end (delta: 149.4 MB). Free memory was 128.7 MB in the beginning and 222.6 MB in the end (delta: -93.9 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2020-09-17 15:04:07,762 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 747.97 ms. Allocated memory was 147.3 MB in the beginning and 205.5 MB in the end (delta: 58.2 MB). Free memory was 101.6 MB in the beginning and 165.4 MB in the end (delta: -63.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 66.61 ms. Allocated memory is still 205.5 MB. Free memory was 165.4 MB in the beginning and 162.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.91 ms. Allocated memory is still 205.5 MB. Free memory was 162.8 MB in the beginning and 161.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 633.31 ms. Allocated memory is still 205.5 MB. Free memory was 161.5 MB in the beginning and 129.4 MB in the end (delta: 32.1 MB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5817.18 ms. Allocated memory was 205.5 MB in the beginning and 354.9 MB in the end (delta: 149.4 MB). Free memory was 128.7 MB in the beginning and 222.6 MB in the end (delta: -93.9 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.9s, 101 ProgramPointsBefore, 59 ProgramPointsAfterwards, 102 TransitionsBefore, 59 TransitionsAfterwards, 2626 CoEnabledTransitionPairs, 6 FixpointIterations, 23 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 1 ChoiceCompositions, 1072 VarBasedMoverChecksPositive, 41 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 8607 CheckedPairsTotal, 47 TotalNumberOfCompositions - CounterExampleResult [Line: 697]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L677] 0 int w=0, r=0, x, y; [L703] 0 pthread_t t1, t2, t3, t4; [L704] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, w=0, x=0, y=0] [L705] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, w=0, x=0, y=0] [L693] 2 int l; [L694] CALL 2 __VERIFIER_atomic_take_read_lock() [L683] CALL 2 assume_abort_if_not(w==0) [L3] COND TRUE 2 !cond [L683] RET 2 assume_abort_if_not(w==0) [L684] 2 r = r+1 [L694] RET 2 __VERIFIER_atomic_take_read_lock() [L695] 2 l = x VAL [r=1, w=0, x=0, y=0] [L706] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=1, w=0, x=0, y=0] [L707] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, w=0, x=0, y=0] [L696] 2 y = l VAL [r=1, w=0, x=0, y=0] [L698] 2 l = r-1 VAL [r=1, w=0, x=0, y=0] [L693] 4 int l; [L694] CALL 4 __VERIFIER_atomic_take_read_lock() [L683] CALL 4 assume_abort_if_not(w==0) [L3] COND TRUE 4 !cond [L683] RET 4 assume_abort_if_not(w==0) [L684] 4 r = r+1 [L694] RET 4 __VERIFIER_atomic_take_read_lock() [L695] 4 l = x VAL [r=2, w=0, x=0, y=0] [L696] 4 y = l VAL [r=2, w=0, x=0, y=0] [L699] 2 r = l [L700] 2 return 0; [L687] CALL 3 __VERIFIER_atomic_take_write_lock() [L679] CALL 3 assume_abort_if_not(w==0 && r==0) [L3] COND TRUE 3 !cond [L679] RET 3 assume_abort_if_not(w==0 && r==0) [L680] 3 w = 1 [L687] RET 3 __VERIFIER_atomic_take_write_lock() [L688] 3 x = 3 VAL [r=0, w=1, x=3, y=0] [L697] COND TRUE 4 !(y == x) [L697] 4 __VERIFIER_error() VAL [r=0, w=1, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.5s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 515 SDtfs, 479 SDslu, 800 SDs, 0 SdLazy, 230 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5928occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 6 MinimizatonAttempts, 3806 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 2598 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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 proved your program to be incorrect! Received shutdown request...