./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/20_lamport.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/20_lamport.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f638772629d909678dff5e67c644c4c6c2152c0f ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 02:47:06,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 02:47:06,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 02:47:06,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 02:47:06,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 02:47:06,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 02:47:06,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 02:47:06,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 02:47:06,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 02:47:06,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 02:47:06,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 02:47:06,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 02:47:06,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 02:47:06,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 02:47:06,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 02:47:06,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 02:47:06,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 02:47:06,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 02:47:06,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 02:47:06,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 02:47:06,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 02:47:06,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 02:47:06,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 02:47:06,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 02:47:06,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 02:47:06,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 02:47:06,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 02:47:06,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 02:47:06,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 02:47:06,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 02:47:06,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 02:47:06,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 02:47:06,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 02:47:06,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 02:47:06,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 02:47:06,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 02:47:06,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 02:47:06,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 02:47:06,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 02:47:06,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 02:47:06,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 02:47:06,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 02:47:06,134 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 02:47:06,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 02:47:06,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 02:47:06,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 02:47:06,136 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 02:47:06,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 02:47:06,137 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 02:47:06,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 02:47:06,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 02:47:06,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 02:47:06,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 02:47:06,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 02:47:06,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 02:47:06,138 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 02:47:06,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 02:47:06,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 02:47:06,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 02:47:06,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 02:47:06,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 02:47:06,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 02:47:06,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 02:47:06,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 02:47:06,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 02:47:06,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 02:47:06,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 02:47:06,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 02:47:06,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 02:47:06,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 02:47:06,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 02:47:06,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f638772629d909678dff5e67c644c4c6c2152c0f [2020-10-20 02:47:06,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 02:47:06,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 02:47:06,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 02:47:06,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 02:47:06,455 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 02:47:06,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/20_lamport.i [2020-10-20 02:47:06,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c5eaca4/1c6a4d1e96b54d6583978614a8548537/FLAG6ea5cafc7 [2020-10-20 02:47:07,159 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 02:47:07,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/20_lamport.i [2020-10-20 02:47:07,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c5eaca4/1c6a4d1e96b54d6583978614a8548537/FLAG6ea5cafc7 [2020-10-20 02:47:07,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24c5eaca4/1c6a4d1e96b54d6583978614a8548537 [2020-10-20 02:47:07,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 02:47:07,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 02:47:07,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 02:47:07,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 02:47:07,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 02:47:07,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:47:07" (1/1) ... [2020-10-20 02:47:07,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f7af92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:07, skipping insertion in model container [2020-10-20 02:47:07,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 02:47:07" (1/1) ... [2020-10-20 02:47:07,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 02:47:07,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 02:47:07,691 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-20 02:47:07,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 02:47:07,913 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 02:47:07,942 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-20 02:47:07,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 02:47:08,090 INFO L208 MainTranslator]: Completed translation [2020-10-20 02:47:08,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08 WrapperNode [2020-10-20 02:47:08,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 02:47:08,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 02:47:08,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 02:47:08,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 02:47:08,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (1/1) ... [2020-10-20 02:47:08,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (1/1) ... [2020-10-20 02:47:08,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 02:47:08,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 02:47:08,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 02:47:08,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 02:47:08,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (1/1) ... [2020-10-20 02:47:08,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (1/1) ... [2020-10-20 02:47:08,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (1/1) ... [2020-10-20 02:47:08,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (1/1) ... [2020-10-20 02:47:08,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (1/1) ... [2020-10-20 02:47:08,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (1/1) ... [2020-10-20 02:47:08,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (1/1) ... [2020-10-20 02:47:08,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 02:47:08,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 02:47:08,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 02:47:08,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 02:47:08,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (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 [2020-10-20 02:47:08,263 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-20 02:47:08,264 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-20 02:47:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 02:47:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-20 02:47:08,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 02:47:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 02:47:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 02:47:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-20 02:47:08,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 02:47:08,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 02:47:08,267 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-20 02:47:08,704 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 02:47:08,705 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-20 02:47:08,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:47:08 BoogieIcfgContainer [2020-10-20 02:47:08,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 02:47:08,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 02:47:08,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 02:47:08,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 02:47:08,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 02:47:07" (1/3) ... [2020-10-20 02:47:08,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9fabc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 02:47:08, skipping insertion in model container [2020-10-20 02:47:08,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 02:47:08" (2/3) ... [2020-10-20 02:47:08,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9fabc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 02:47:08, skipping insertion in model container [2020-10-20 02:47:08,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:47:08" (3/3) ... [2020-10-20 02:47:08,717 INFO L111 eAbstractionObserver]: Analyzing ICFG 20_lamport.i [2020-10-20 02:47:08,731 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-20 02:47:08,731 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 02:47:08,739 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 02:47:08,740 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-20 02:47:08,771 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,771 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,772 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,772 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,773 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,773 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,773 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,773 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,774 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,774 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,774 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,774 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,775 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,775 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,775 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,775 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,776 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,776 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,776 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,777 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,777 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,777 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,778 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,778 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,778 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,778 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,783 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,783 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,784 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,784 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~y1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,784 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,785 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~b21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,785 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,785 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~x1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,785 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-20 02:47:08,796 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-20 02:47:08,813 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-20 02:47:08,836 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 02:47:08,836 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 02:47:08,836 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 02:47:08,837 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 02:47:08,845 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 02:47:08,846 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 02:47:08,846 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 02:47:08,847 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 02:47:08,873 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-20 02:47:08,877 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 118 transitions, 241 flow [2020-10-20 02:47:08,880 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 118 transitions, 241 flow [2020-10-20 02:47:08,882 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 96 places, 118 transitions, 241 flow [2020-10-20 02:47:08,942 INFO L129 PetriNetUnfolder]: 26/117 cut-off events. [2020-10-20 02:47:08,943 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-20 02:47:08,952 INFO L80 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 117 events. 26/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 256 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 100. Up to 5 conditions per place. [2020-10-20 02:47:08,959 INFO L117 LiptonReduction]: Number of co-enabled transitions 4950 [2020-10-20 02:47:10,499 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-20 02:47:10,783 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-20 02:47:10,896 INFO L132 LiptonReduction]: Checked pairs total: 13295 [2020-10-20 02:47:10,897 INFO L134 LiptonReduction]: Total number of compositions: 91 [2020-10-20 02:47:10,904 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 59 transitions, 123 flow [2020-10-20 02:47:10,932 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 402 states. [2020-10-20 02:47:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states. [2020-10-20 02:47:10,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-20 02:47:10,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:47:10,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-20 02:47:10,943 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:47:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:47:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash 15673652, now seen corresponding path program 1 times [2020-10-20 02:47:10,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:47:10,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904751510] [2020-10-20 02:47:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:47:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:47:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:47:11,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904751510] [2020-10-20 02:47:11,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:47:11,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 02:47:11,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104782425] [2020-10-20 02:47:11,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 02:47:11,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:47:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 02:47:11,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 02:47:11,151 INFO L87 Difference]: Start difference. First operand 402 states. Second operand 2 states. [2020-10-20 02:47:11,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:47:11,186 INFO L93 Difference]: Finished difference Result 402 states and 1002 transitions. [2020-10-20 02:47:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 02:47:11,188 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-10-20 02:47:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:47:11,208 INFO L225 Difference]: With dead ends: 402 [2020-10-20 02:47:11,209 INFO L226 Difference]: Without dead ends: 393 [2020-10-20 02:47:11,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 02:47:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-20 02:47:11,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2020-10-20 02:47:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-20 02:47:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 984 transitions. [2020-10-20 02:47:11,319 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 984 transitions. Word has length 4 [2020-10-20 02:47:11,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:47:11,320 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 984 transitions. [2020-10-20 02:47:11,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 02:47:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 984 transitions. [2020-10-20 02:47:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 02:47:11,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:47:11,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:47:11,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 02:47:11,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:47:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:47:11,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1634562799, now seen corresponding path program 1 times [2020-10-20 02:47:11,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:47:11,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924646041] [2020-10-20 02:47:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:47:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:47:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:47:11,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924646041] [2020-10-20 02:47:11,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:47:11,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 02:47:11,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563757224] [2020-10-20 02:47:11,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 02:47:11,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:47:11,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 02:47:11,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,420 INFO L87 Difference]: Start difference. First operand 393 states and 984 transitions. Second operand 3 states. [2020-10-20 02:47:11,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:47:11,458 INFO L93 Difference]: Finished difference Result 389 states and 960 transitions. [2020-10-20 02:47:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 02:47:11,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 02:47:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:47:11,463 INFO L225 Difference]: With dead ends: 389 [2020-10-20 02:47:11,463 INFO L226 Difference]: Without dead ends: 341 [2020-10-20 02:47:11,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-20 02:47:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 335. [2020-10-20 02:47:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-10-20 02:47:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 843 transitions. [2020-10-20 02:47:11,493 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 843 transitions. Word has length 9 [2020-10-20 02:47:11,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:47:11,493 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 843 transitions. [2020-10-20 02:47:11,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 02:47:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 843 transitions. [2020-10-20 02:47:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 02:47:11,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:47:11,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:47:11,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 02:47:11,496 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:47:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:47:11,498 INFO L82 PathProgramCache]: Analyzing trace with hash 87609182, now seen corresponding path program 1 times [2020-10-20 02:47:11,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:47:11,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031601506] [2020-10-20 02:47:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:47:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:47:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:47:11,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031601506] [2020-10-20 02:47:11,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:47:11,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 02:47:11,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560383494] [2020-10-20 02:47:11,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 02:47:11,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:47:11,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 02:47:11,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,545 INFO L87 Difference]: Start difference. First operand 335 states and 843 transitions. Second operand 3 states. [2020-10-20 02:47:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:47:11,603 INFO L93 Difference]: Finished difference Result 321 states and 804 transitions. [2020-10-20 02:47:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 02:47:11,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 02:47:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:47:11,606 INFO L225 Difference]: With dead ends: 321 [2020-10-20 02:47:11,607 INFO L226 Difference]: Without dead ends: 273 [2020-10-20 02:47:11,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-20 02:47:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2020-10-20 02:47:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-20 02:47:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 694 transitions. [2020-10-20 02:47:11,622 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 694 transitions. Word has length 9 [2020-10-20 02:47:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:47:11,622 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 694 transitions. [2020-10-20 02:47:11,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 02:47:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 694 transitions. [2020-10-20 02:47:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:47:11,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:47:11,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:47:11,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 02:47:11,626 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:47:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:47:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1962295688, now seen corresponding path program 1 times [2020-10-20 02:47:11,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:47:11,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819764416] [2020-10-20 02:47:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:47:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:47:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:47:11,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819764416] [2020-10-20 02:47:11,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:47:11,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 02:47:11,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277739970] [2020-10-20 02:47:11,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 02:47:11,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:47:11,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 02:47:11,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,683 INFO L87 Difference]: Start difference. First operand 273 states and 694 transitions. Second operand 3 states. [2020-10-20 02:47:11,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:47:11,745 INFO L93 Difference]: Finished difference Result 496 states and 1226 transitions. [2020-10-20 02:47:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 02:47:11,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-20 02:47:11,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:47:11,748 INFO L225 Difference]: With dead ends: 496 [2020-10-20 02:47:11,749 INFO L226 Difference]: Without dead ends: 335 [2020-10-20 02:47:11,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-20 02:47:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 322. [2020-10-20 02:47:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-20 02:47:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 794 transitions. [2020-10-20 02:47:11,761 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 794 transitions. Word has length 15 [2020-10-20 02:47:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:47:11,762 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 794 transitions. [2020-10-20 02:47:11,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 02:47:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 794 transitions. [2020-10-20 02:47:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:47:11,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:47:11,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:47:11,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 02:47:11,765 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:47:11,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:47:11,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1219231776, now seen corresponding path program 2 times [2020-10-20 02:47:11,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:47:11,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352573115] [2020-10-20 02:47:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:47:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:47:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:47:11,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352573115] [2020-10-20 02:47:11,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:47:11,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 02:47:11,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935776726] [2020-10-20 02:47:11,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 02:47:11,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:47:11,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 02:47:11,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,800 INFO L87 Difference]: Start difference. First operand 322 states and 794 transitions. Second operand 3 states. [2020-10-20 02:47:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:47:11,819 INFO L93 Difference]: Finished difference Result 464 states and 1079 transitions. [2020-10-20 02:47:11,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 02:47:11,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-20 02:47:11,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:47:11,823 INFO L225 Difference]: With dead ends: 464 [2020-10-20 02:47:11,823 INFO L226 Difference]: Without dead ends: 455 [2020-10-20 02:47:11,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-20 02:47:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 357. [2020-10-20 02:47:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-20 02:47:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 877 transitions. [2020-10-20 02:47:11,838 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 877 transitions. Word has length 15 [2020-10-20 02:47:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:47:11,838 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 877 transitions. [2020-10-20 02:47:11,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 02:47:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 877 transitions. [2020-10-20 02:47:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:47:11,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:47:11,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:47:11,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 02:47:11,840 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:47:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:47:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1003883118, now seen corresponding path program 3 times [2020-10-20 02:47:11,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:47:11,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660312691] [2020-10-20 02:47:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:47:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:47:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:47:11,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660312691] [2020-10-20 02:47:11,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:47:11,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 02:47:11,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724335645] [2020-10-20 02:47:11,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 02:47:11,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:47:11,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 02:47:11,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,891 INFO L87 Difference]: Start difference. First operand 357 states and 877 transitions. Second operand 3 states. [2020-10-20 02:47:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:47:11,926 INFO L93 Difference]: Finished difference Result 377 states and 825 transitions. [2020-10-20 02:47:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 02:47:11,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-20 02:47:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:47:11,930 INFO L225 Difference]: With dead ends: 377 [2020-10-20 02:47:11,930 INFO L226 Difference]: Without dead ends: 369 [2020-10-20 02:47:11,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-20 02:47:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 299. [2020-10-20 02:47:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-20 02:47:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 677 transitions. [2020-10-20 02:47:11,941 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 677 transitions. Word has length 15 [2020-10-20 02:47:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:47:11,943 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 677 transitions. [2020-10-20 02:47:11,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 02:47:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 677 transitions. [2020-10-20 02:47:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 02:47:11,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:47:11,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:47:11,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 02:47:11,945 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:47:11,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:47:11,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1841211242, now seen corresponding path program 4 times [2020-10-20 02:47:11,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:47:11,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038175225] [2020-10-20 02:47:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:47:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:47:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:47:11,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038175225] [2020-10-20 02:47:11,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:47:11,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 02:47:11,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120071723] [2020-10-20 02:47:11,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 02:47:11,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:47:11,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 02:47:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:11,977 INFO L87 Difference]: Start difference. First operand 299 states and 677 transitions. Second operand 3 states. [2020-10-20 02:47:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:47:12,011 INFO L93 Difference]: Finished difference Result 250 states and 518 transitions. [2020-10-20 02:47:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 02:47:12,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-20 02:47:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:47:12,013 INFO L225 Difference]: With dead ends: 250 [2020-10-20 02:47:12,013 INFO L226 Difference]: Without dead ends: 164 [2020-10-20 02:47:12,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 02:47:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-20 02:47:12,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 124. [2020-10-20 02:47:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-20 02:47:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 244 transitions. [2020-10-20 02:47:12,019 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 244 transitions. Word has length 15 [2020-10-20 02:47:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:47:12,019 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 244 transitions. [2020-10-20 02:47:12,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 02:47:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 244 transitions. [2020-10-20 02:47:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 02:47:12,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:47:12,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:47:12,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 02:47:12,021 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:47:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:47:12,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1626905937, now seen corresponding path program 1 times [2020-10-20 02:47:12,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:47:12,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120013210] [2020-10-20 02:47:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:47:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:47:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:47:12,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120013210] [2020-10-20 02:47:12,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:47:12,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:47:12,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735190364] [2020-10-20 02:47:12,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 02:47:12,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:47:12,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 02:47:12,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 02:47:12,075 INFO L87 Difference]: Start difference. First operand 124 states and 244 transitions. Second operand 4 states. [2020-10-20 02:47:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:47:12,101 INFO L93 Difference]: Finished difference Result 119 states and 234 transitions. [2020-10-20 02:47:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 02:47:12,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-20 02:47:12,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:47:12,106 INFO L225 Difference]: With dead ends: 119 [2020-10-20 02:47:12,107 INFO L226 Difference]: Without dead ends: 97 [2020-10-20 02:47:12,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 02:47:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-20 02:47:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-20 02:47:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-20 02:47:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 191 transitions. [2020-10-20 02:47:12,115 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 191 transitions. Word has length 19 [2020-10-20 02:47:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:47:12,115 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 191 transitions. [2020-10-20 02:47:12,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 02:47:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 191 transitions. [2020-10-20 02:47:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 02:47:12,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 02:47:12,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 02:47:12,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 02:47:12,120 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 02:47:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 02:47:12,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1299323923, now seen corresponding path program 1 times [2020-10-20 02:47:12,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 02:47:12,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099820253] [2020-10-20 02:47:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 02:47:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 02:47:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 02:47:12,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099820253] [2020-10-20 02:47:12,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 02:47:12,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 02:47:12,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135543409] [2020-10-20 02:47:12,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 02:47:12,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 02:47:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 02:47:12,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 02:47:12,156 INFO L87 Difference]: Start difference. First operand 97 states and 191 transitions. Second operand 4 states. [2020-10-20 02:47:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 02:47:12,181 INFO L93 Difference]: Finished difference Result 76 states and 161 transitions. [2020-10-20 02:47:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 02:47:12,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-20 02:47:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 02:47:12,182 INFO L225 Difference]: With dead ends: 76 [2020-10-20 02:47:12,182 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 02:47:12,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 02:47:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 02:47:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 02:47:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 02:47:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 02:47:12,184 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-20 02:47:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 02:47:12,184 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 02:47:12,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 02:47:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 02:47:12,184 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 02:47:12,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 02:47:12,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 02:47:12 BasicIcfg [2020-10-20 02:47:12,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 02:47:12,190 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 02:47:12,190 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 02:47:12,190 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 02:47:12,191 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 02:47:08" (3/4) ... [2020-10-20 02:47:12,195 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 02:47:12,209 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2020-10-20 02:47:12,216 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-20 02:47:12,216 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 02:47:12,217 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 02:47:12,217 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 02:47:12,262 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 02:47:12,263 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 02:47:12,265 INFO L168 Benchmark]: Toolchain (without parser) took 4866.49 ms. Allocated memory was 43.0 MB in the beginning and 71.3 MB in the end (delta: 28.3 MB). Free memory was 20.2 MB in the beginning and 44.9 MB in the end (delta: -24.7 MB). Peak memory consumption was 3.6 MB. Max. memory is 14.3 GB. [2020-10-20 02:47:12,266 INFO L168 Benchmark]: CDTParser took 1.02 ms. Allocated memory is still 32.0 MB. Free memory was 9.2 MB in the beginning and 9.1 MB in the end (delta: 45.6 kB). Peak memory consumption was 45.6 kB. Max. memory is 14.3 GB. [2020-10-20 02:47:12,267 INFO L168 Benchmark]: CACSL2BoogieTranslator took 685.68 ms. Allocated memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Free memory was 19.3 MB in the beginning and 14.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. [2020-10-20 02:47:12,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.90 ms. Allocated memory is still 45.1 MB. Free memory was 14.1 MB in the beginning and 11.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. [2020-10-20 02:47:12,269 INFO L168 Benchmark]: Boogie Preprocessor took 39.87 ms. Allocated memory was 45.1 MB in the beginning and 45.6 MB in the end (delta: 524.3 kB). Free memory was 11.7 MB in the beginning and 29.1 MB in the end (delta: -17.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 02:47:12,269 INFO L168 Benchmark]: RCFGBuilder took 512.50 ms. Allocated memory was 45.6 MB in the beginning and 47.2 MB in the end (delta: 1.6 MB). Free memory was 29.1 MB in the beginning and 19.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 14.3 GB. [2020-10-20 02:47:12,270 INFO L168 Benchmark]: TraceAbstraction took 3480.28 ms. Allocated memory was 47.2 MB in the beginning and 71.3 MB in the end (delta: 24.1 MB). Free memory was 19.0 MB in the beginning and 48.2 MB in the end (delta: -29.2 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 02:47:12,271 INFO L168 Benchmark]: Witness Printer took 73.55 ms. Allocated memory is still 71.3 MB. Free memory was 48.2 MB in the beginning and 44.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 14.3 GB. [2020-10-20 02:47:12,275 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.02 ms. Allocated memory is still 32.0 MB. Free memory was 9.2 MB in the beginning and 9.1 MB in the end (delta: 45.6 kB). Peak memory consumption was 45.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 685.68 ms. Allocated memory was 43.0 MB in the beginning and 45.1 MB in the end (delta: 2.1 MB). Free memory was 19.3 MB in the beginning and 14.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 62.90 ms. Allocated memory is still 45.1 MB. Free memory was 14.1 MB in the beginning and 11.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 39.87 ms. Allocated memory was 45.1 MB in the beginning and 45.6 MB in the end (delta: 524.3 kB). Free memory was 11.7 MB in the beginning and 29.1 MB in the end (delta: -17.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 512.50 ms. Allocated memory was 45.6 MB in the beginning and 47.2 MB in the end (delta: 1.6 MB). Free memory was 29.1 MB in the beginning and 19.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3480.28 ms. Allocated memory was 47.2 MB in the beginning and 71.3 MB in the end (delta: 24.1 MB). Free memory was 19.0 MB in the beginning and 48.2 MB in the end (delta: -29.2 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 73.55 ms. Allocated memory is still 71.3 MB. Free memory was 48.2 MB in the beginning and 44.9 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 3265 VarBasedMoverChecksPositive, 129 VarBasedMoverChecksNegative, 61 SemBasedMoverChecksPositive, 68 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 603 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.0s, 96 PlacesBefore, 45 PlacesAfterwards, 118 TransitionsBefore, 59 TransitionsAfterwards, 4950 CoEnabledTransitionPairs, 5 FixpointIterations, 15 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 8 ChoiceCompositions, 91 TotalNumberOfCompositions, 13295 MoverChecksTotal - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 93 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 526 SDtfs, 234 SDslu, 335 SDs, 0 SdLazy, 96 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=402occurred 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 227 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 2741 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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 correct! Received shutdown request...