./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-atomic/szymanski.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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_1.5.800.v20200727-1323.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-atomic/szymanski.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 259b9e1ed5af43118fd0f3c27466aba2ca6f90ac ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 00:08:03,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 00:08:03,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 00:08:03,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 00:08:03,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 00:08:03,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 00:08:03,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 00:08:03,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 00:08:03,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 00:08:03,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 00:08:03,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 00:08:03,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 00:08:03,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 00:08:03,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 00:08:03,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 00:08:03,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 00:08:03,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 00:08:03,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 00:08:03,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 00:08:03,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 00:08:03,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 00:08:03,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 00:08:03,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 00:08:04,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 00:08:04,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 00:08:04,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 00:08:04,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 00:08:04,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 00:08:04,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 00:08:04,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 00:08:04,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 00:08:04,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 00:08:04,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 00:08:04,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 00:08:04,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 00:08:04,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 00:08:04,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 00:08:04,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 00:08:04,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 00:08:04,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 00:08:04,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 00:08:04,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 00:08:04,055 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 00:08:04,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 00:08:04,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 00:08:04,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 00:08:04,058 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 00:08:04,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 00:08:04,059 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 00:08:04,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 00:08:04,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 00:08:04,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 00:08:04,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 00:08:04,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 00:08:04,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 00:08:04,061 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 00:08:04,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 00:08:04,062 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 00:08:04,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 00:08:04,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 00:08:04,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 00:08:04,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 00:08:04,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 00:08:04,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 00:08:04,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 00:08:04,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 00:08:04,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 00:08:04,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 00:08:04,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 00:08:04,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 00:08:04,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 00:08:04,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 259b9e1ed5af43118fd0f3c27466aba2ca6f90ac [2020-10-26 00:08:04,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 00:08:04,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 00:08:04,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 00:08:04,522 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 00:08:04,523 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 00:08:04,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/szymanski.i [2020-10-26 00:08:04,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867345bb6/eae899e06397413497e4df23f3d0197e/FLAG4b0acb4e2 [2020-10-26 00:08:05,405 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 00:08:05,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/szymanski.i [2020-10-26 00:08:05,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867345bb6/eae899e06397413497e4df23f3d0197e/FLAG4b0acb4e2 [2020-10-26 00:08:05,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867345bb6/eae899e06397413497e4df23f3d0197e [2020-10-26 00:08:05,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 00:08:05,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 00:08:05,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 00:08:05,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 00:08:05,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 00:08:05,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:08:05" (1/1) ... [2020-10-26 00:08:05,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c83b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:05, skipping insertion in model container [2020-10-26 00:08:05,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:08:05" (1/1) ... [2020-10-26 00:08:05,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 00:08:05,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 00:08:05,773 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-26 00:08:06,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:08:06,025 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 00:08:06,055 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-26 00:08:06,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:08:06,228 INFO L208 MainTranslator]: Completed translation [2020-10-26 00:08:06,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06 WrapperNode [2020-10-26 00:08:06,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 00:08:06,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 00:08:06,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 00:08:06,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 00:08:06,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (1/1) ... [2020-10-26 00:08:06,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (1/1) ... [2020-10-26 00:08:06,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 00:08:06,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 00:08:06,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 00:08:06,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 00:08:06,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (1/1) ... [2020-10-26 00:08:06,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (1/1) ... [2020-10-26 00:08:06,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (1/1) ... [2020-10-26 00:08:06,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (1/1) ... [2020-10-26 00:08:06,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (1/1) ... [2020-10-26 00:08:06,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (1/1) ... [2020-10-26 00:08:06,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (1/1) ... [2020-10-26 00:08:06,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 00:08:06,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 00:08:06,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 00:08:06,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 00:08:06,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (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 [2020-10-26 00:08:06,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 00:08:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-10-26 00:08:06,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-10-26 00:08:06,400 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-26 00:08:06,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-26 00:08:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 00:08:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-26 00:08:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 00:08:06,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 00:08:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 00:08:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-26 00:08:06,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 00:08:06,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 00:08:06,404 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-26 00:08:07,011 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 00:08:07,011 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-10-26 00:08:07,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:08:07 BoogieIcfgContainer [2020-10-26 00:08:07,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 00:08:07,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 00:08:07,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 00:08:07,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 00:08:07,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 12:08:05" (1/3) ... [2020-10-26 00:08:07,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6da6b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:08:07, skipping insertion in model container [2020-10-26 00:08:07,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:08:06" (2/3) ... [2020-10-26 00:08:07,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6da6b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:08:07, skipping insertion in model container [2020-10-26 00:08:07,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:08:07" (3/3) ... [2020-10-26 00:08:07,029 INFO L111 eAbstractionObserver]: Analyzing ICFG szymanski.i [2020-10-26 00:08:07,044 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-26 00:08:07,044 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 00:08:07,051 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-26 00:08:07,052 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-26 00:08:07,103 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,103 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,103 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,103 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,104 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,104 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,104 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,104 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,105 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,105 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,105 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,105 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,106 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,106 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,106 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,106 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,107 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,107 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,107 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,109 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,111 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,111 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,112 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,113 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,113 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,115 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,115 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~_.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,115 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,116 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,116 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,116 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,116 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,117 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,118 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,118 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,119 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,119 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,124 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,125 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,125 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,126 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,126 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,128 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,128 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,128 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,129 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,129 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,129 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,129 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,130 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,137 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,137 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,137 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,137 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,137 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,138 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,138 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,152 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,152 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,152 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,153 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,153 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,153 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~f12~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,153 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~_.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:08:07,166 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-10-26 00:08:07,182 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-10-26 00:08:07,220 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 00:08:07,221 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 00:08:07,221 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 00:08:07,221 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 00:08:07,221 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 00:08:07,221 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 00:08:07,221 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 00:08:07,221 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 00:08:07,239 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-26 00:08:07,241 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 109 transitions, 240 flow [2020-10-26 00:08:07,245 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 109 transitions, 240 flow [2020-10-26 00:08:07,247 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 92 places, 109 transitions, 240 flow [2020-10-26 00:08:07,327 INFO L129 PetriNetUnfolder]: 23/109 cut-off events. [2020-10-26 00:08:07,327 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-26 00:08:07,334 INFO L80 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 109 events. 23/109 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 145 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 83. Up to 3 conditions per place. [2020-10-26 00:08:07,339 INFO L116 LiptonReduction]: Number of co-enabled transitions 3528 [2020-10-26 00:08:08,976 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-26 00:08:09,101 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 00:08:09,247 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 00:08:09,366 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 00:08:09,388 INFO L131 LiptonReduction]: Checked pairs total: 9743 [2020-10-26 00:08:09,388 INFO L133 LiptonReduction]: Total number of compositions: 82 [2020-10-26 00:08:09,395 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 54 transitions, 130 flow [2020-10-26 00:08:09,435 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 540 states. [2020-10-26 00:08:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states. [2020-10-26 00:08:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 00:08:09,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:09,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:09,448 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:09,454 INFO L82 PathProgramCache]: Analyzing trace with hash -370162947, now seen corresponding path program 1 times [2020-10-26 00:08:09,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:09,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204919675] [2020-10-26 00:08:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:09,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204919675] [2020-10-26 00:08:09,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:09,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:08:09,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201281570] [2020-10-26 00:08:09,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:08:09,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:08:09,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:08:09,723 INFO L87 Difference]: Start difference. First operand 540 states. Second operand 3 states. [2020-10-26 00:08:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:09,860 INFO L93 Difference]: Finished difference Result 588 states and 1620 transitions. [2020-10-26 00:08:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:08:09,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-26 00:08:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:09,883 INFO L225 Difference]: With dead ends: 588 [2020-10-26 00:08:09,884 INFO L226 Difference]: Without dead ends: 420 [2020-10-26 00:08:09,885 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 [2020-10-26 00:08:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-10-26 00:08:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 402. [2020-10-26 00:08:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-26 00:08:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1144 transitions. [2020-10-26 00:08:09,974 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1144 transitions. Word has length 10 [2020-10-26 00:08:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:09,976 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 1144 transitions. [2020-10-26 00:08:09,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:08:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1144 transitions. [2020-10-26 00:08:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-26 00:08:09,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:09,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:09,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 00:08:09,980 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 578120779, now seen corresponding path program 1 times [2020-10-26 00:08:09,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:09,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346763542] [2020-10-26 00:08:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:10,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346763542] [2020-10-26 00:08:10,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:10,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:08:10,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353669595] [2020-10-26 00:08:10,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:08:10,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:10,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:08:10,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:08:10,120 INFO L87 Difference]: Start difference. First operand 402 states and 1144 transitions. Second operand 3 states. [2020-10-26 00:08:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:10,163 INFO L93 Difference]: Finished difference Result 389 states and 1093 transitions. [2020-10-26 00:08:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:08:10,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-26 00:08:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:10,174 INFO L225 Difference]: With dead ends: 389 [2020-10-26 00:08:10,174 INFO L226 Difference]: Without dead ends: 284 [2020-10-26 00:08:10,175 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 [2020-10-26 00:08:10,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-26 00:08:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2020-10-26 00:08:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-26 00:08:10,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 801 transitions. [2020-10-26 00:08:10,215 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 801 transitions. Word has length 12 [2020-10-26 00:08:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:10,215 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 801 transitions. [2020-10-26 00:08:10,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:08:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 801 transitions. [2020-10-26 00:08:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:08:10,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:10,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:10,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 00:08:10,219 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:10,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1290529882, now seen corresponding path program 1 times [2020-10-26 00:08:10,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:10,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679817029] [2020-10-26 00:08:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:10,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679817029] [2020-10-26 00:08:10,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:10,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 00:08:10,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337126401] [2020-10-26 00:08:10,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:08:10,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:10,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:08:10,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:08:10,287 INFO L87 Difference]: Start difference. First operand 284 states and 801 transitions. Second operand 3 states. [2020-10-26 00:08:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:10,315 INFO L93 Difference]: Finished difference Result 284 states and 797 transitions. [2020-10-26 00:08:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:08:10,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-26 00:08:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:10,319 INFO L225 Difference]: With dead ends: 284 [2020-10-26 00:08:10,319 INFO L226 Difference]: Without dead ends: 284 [2020-10-26 00:08:10,319 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 [2020-10-26 00:08:10,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-26 00:08:10,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2020-10-26 00:08:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-26 00:08:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 797 transitions. [2020-10-26 00:08:10,331 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 797 transitions. Word has length 19 [2020-10-26 00:08:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:10,332 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 797 transitions. [2020-10-26 00:08:10,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:08:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 797 transitions. [2020-10-26 00:08:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:08:10,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:10,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:10,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 00:08:10,335 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:10,336 INFO L82 PathProgramCache]: Analyzing trace with hash 133935700, now seen corresponding path program 2 times [2020-10-26 00:08:10,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:10,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268391560] [2020-10-26 00:08:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:10,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268391560] [2020-10-26 00:08:10,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:10,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:08:10,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987284021] [2020-10-26 00:08:10,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:08:10,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:10,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:08:10,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:08:10,411 INFO L87 Difference]: Start difference. First operand 284 states and 797 transitions. Second operand 4 states. [2020-10-26 00:08:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:10,510 INFO L93 Difference]: Finished difference Result 378 states and 1066 transitions. [2020-10-26 00:08:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:08:10,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-26 00:08:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:10,513 INFO L225 Difference]: With dead ends: 378 [2020-10-26 00:08:10,513 INFO L226 Difference]: Without dead ends: 252 [2020-10-26 00:08:10,514 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 [2020-10-26 00:08:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-26 00:08:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 228. [2020-10-26 00:08:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-26 00:08:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 581 transitions. [2020-10-26 00:08:10,524 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 581 transitions. Word has length 19 [2020-10-26 00:08:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:10,524 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 581 transitions. [2020-10-26 00:08:10,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:08:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 581 transitions. [2020-10-26 00:08:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:08:10,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:10,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:10,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 00:08:10,527 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1578565438, now seen corresponding path program 1 times [2020-10-26 00:08:10,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:10,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699050353] [2020-10-26 00:08:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:10,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699050353] [2020-10-26 00:08:10,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:10,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:08:10,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165653768] [2020-10-26 00:08:10,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:08:10,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:08:10,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:08:10,575 INFO L87 Difference]: Start difference. First operand 228 states and 581 transitions. Second operand 4 states. [2020-10-26 00:08:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:10,656 INFO L93 Difference]: Finished difference Result 344 states and 853 transitions. [2020-10-26 00:08:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:08:10,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-26 00:08:10,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:10,659 INFO L225 Difference]: With dead ends: 344 [2020-10-26 00:08:10,659 INFO L226 Difference]: Without dead ends: 332 [2020-10-26 00:08:10,660 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 [2020-10-26 00:08:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-26 00:08:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2020-10-26 00:08:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-26 00:08:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 667 transitions. [2020-10-26 00:08:10,669 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 667 transitions. Word has length 19 [2020-10-26 00:08:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:10,670 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 667 transitions. [2020-10-26 00:08:10,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:08:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 667 transitions. [2020-10-26 00:08:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 00:08:10,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:08:10,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:08:10,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 00:08:10,672 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:08:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:08:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash 791082734, now seen corresponding path program 2 times [2020-10-26 00:08:10,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:08:10,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580445891] [2020-10-26 00:08:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:08:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:08:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 00:08:10,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580445891] [2020-10-26 00:08:10,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:08:10,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 00:08:10,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105581863] [2020-10-26 00:08:10,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 00:08:10,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:08:10,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 00:08:10,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 00:08:10,727 INFO L87 Difference]: Start difference. First operand 260 states and 667 transitions. Second operand 4 states. [2020-10-26 00:08:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:08:10,785 INFO L93 Difference]: Finished difference Result 238 states and 610 transitions. [2020-10-26 00:08:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 00:08:10,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-26 00:08:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:08:10,786 INFO L225 Difference]: With dead ends: 238 [2020-10-26 00:08:10,786 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 00:08:10,786 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 [2020-10-26 00:08:10,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 00:08:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 00:08:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 00:08:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 00:08:10,787 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-26 00:08:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:08:10,787 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 00:08:10,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 00:08:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 00:08:10,788 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 00:08:10,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 00:08:10,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 12:08:10 BasicIcfg [2020-10-26 00:08:10,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 00:08:10,792 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 00:08:10,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 00:08:10,793 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 00:08:10,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:08:07" (3/4) ... [2020-10-26 00:08:10,797 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-26 00:08:10,804 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr2 [2020-10-26 00:08:10,804 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2020-10-26 00:08:10,808 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-10-26 00:08:10,809 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-26 00:08:10,809 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:08:10,809 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:08:10,847 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 00:08:10,848 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 00:08:10,849 INFO L168 Benchmark]: Toolchain (without parser) took 5395.68 ms. Allocated memory was 41.9 MB in the beginning and 98.6 MB in the end (delta: 56.6 MB). Free memory was 18.2 MB in the beginning and 59.9 MB in the end (delta: -41.7 MB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:10,850 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory is still 29.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:08:10,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 767.90 ms. Allocated memory was 41.9 MB in the beginning and 54.5 MB in the end (delta: 12.6 MB). Free memory was 17.6 MB in the beginning and 33.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:10,851 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.37 ms. Allocated memory is still 54.5 MB. Free memory was 33.8 MB in the beginning and 31.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:10,852 INFO L168 Benchmark]: Boogie Preprocessor took 35.60 ms. Allocated memory is still 54.5 MB. Free memory was 31.7 MB in the beginning and 30.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:08:10,853 INFO L168 Benchmark]: RCFGBuilder took 695.47 ms. Allocated memory is still 54.5 MB. Free memory was 30.2 MB in the beginning and 34.3 MB in the end (delta: -4.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:10,853 INFO L168 Benchmark]: TraceAbstraction took 3770.83 ms. Allocated memory was 54.5 MB in the beginning and 98.6 MB in the end (delta: 44.0 MB). Free memory was 33.8 MB in the beginning and 62.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:10,854 INFO L168 Benchmark]: Witness Printer took 55.49 ms. Allocated memory is still 98.6 MB. Free memory was 62.0 MB in the beginning and 59.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:08:10,858 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory is still 29.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 767.90 ms. Allocated memory was 41.9 MB in the beginning and 54.5 MB in the end (delta: 12.6 MB). Free memory was 17.6 MB in the beginning and 33.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.37 ms. Allocated memory is still 54.5 MB. Free memory was 33.8 MB in the beginning and 31.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.60 ms. Allocated memory is still 54.5 MB. Free memory was 31.7 MB in the beginning and 30.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 695.47 ms. Allocated memory is still 54.5 MB. Free memory was 30.2 MB in the beginning and 34.3 MB in the end (delta: -4.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3770.83 ms. Allocated memory was 54.5 MB in the beginning and 98.6 MB in the end (delta: 44.0 MB). Free memory was 33.8 MB in the beginning and 62.0 MB in the end (delta: -28.1 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * Witness Printer took 55.49 ms. Allocated memory is still 98.6 MB. Free memory was 62.0 MB in the beginning and 59.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 2277 VarBasedMoverChecksPositive, 59 VarBasedMoverChecksNegative, 9 SemBasedMoverChecksPositive, 50 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 338 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.1s, 92 PlacesBefore, 47 PlacesAfterwards, 109 TransitionsBefore, 54 TransitionsAfterwards, 3528 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 10 ChoiceCompositions, 82 TotalNumberOfCompositions, 9743 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 3 procedures, 86 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 361 SDtfs, 222 SDslu, 254 SDs, 0 SdLazy, 159 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=540occurred 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, 6 MinimizatonAttempts, 114 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 2258 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 correct! Received shutdown request...