./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/16_peterson.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-ext/16_peterson.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 bd7903856558b9ff5641d5a64d8691ff1ff0b115 .................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 00:09:30,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 00:09:30,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 00:09:30,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 00:09:30,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 00:09:30,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 00:09:30,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 00:09:30,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 00:09:30,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 00:09:30,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 00:09:30,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 00:09:30,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 00:09:30,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 00:09:30,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 00:09:30,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 00:09:30,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 00:09:30,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 00:09:30,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 00:09:30,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 00:09:30,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 00:09:30,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 00:09:30,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 00:09:30,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 00:09:30,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 00:09:30,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 00:09:30,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 00:09:30,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 00:09:30,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 00:09:30,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 00:09:30,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 00:09:30,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 00:09:30,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 00:09:30,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 00:09:30,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 00:09:30,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 00:09:30,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 00:09:30,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 00:09:30,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 00:09:30,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 00:09:30,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 00:09:30,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 00:09:30,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 00:09:30,723 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 00:09:30,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 00:09:30,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 00:09:30,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 00:09:30,726 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 00:09:30,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 00:09:30,726 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 00:09:30,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 00:09:30,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 00:09:30,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 00:09:30,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 00:09:30,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 00:09:30,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 00:09:30,728 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 00:09:30,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 00:09:30,729 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 00:09:30,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 00:09:30,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 00:09:30,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 00:09:30,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 00:09:30,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 00:09:30,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 00:09:30,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 00:09:30,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 00:09:30,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 00:09:30,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 00:09:30,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 00:09:30,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 00:09:30,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 00:09:30,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd7903856558b9ff5641d5a64d8691ff1ff0b115 [2020-10-26 00:09:31,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 00:09:31,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 00:09:31,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 00:09:31,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 00:09:31,211 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 00:09:31,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/16_peterson.i [2020-10-26 00:09:31,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f74a6519d/86ed6b7d16bf436881dbefa72930b48f/FLAGba109c02e [2020-10-26 00:09:31,941 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 00:09:31,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/16_peterson.i [2020-10-26 00:09:31,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f74a6519d/86ed6b7d16bf436881dbefa72930b48f/FLAGba109c02e [2020-10-26 00:09:32,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f74a6519d/86ed6b7d16bf436881dbefa72930b48f [2020-10-26 00:09:32,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 00:09:32,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 00:09:32,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 00:09:32,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 00:09:32,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 00:09:32,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:32,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2e0194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32, skipping insertion in model container [2020-10-26 00:09:32,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:32,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 00:09:32,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 00:09:32,529 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-26 00:09:32,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:09:32,779 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 00:09:32,816 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-10-26 00:09:32,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 00:09:32,930 INFO L208 MainTranslator]: Completed translation [2020-10-26 00:09:32,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32 WrapperNode [2020-10-26 00:09:32,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 00:09:32,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 00:09:32,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 00:09:32,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 00:09:32,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:32,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:32,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 00:09:32,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 00:09:32,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 00:09:32,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 00:09:32,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:32,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:33,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:33,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:33,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:33,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:33,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (1/1) ... [2020-10-26 00:09:33,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 00:09:33,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 00:09:33,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 00:09:33,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 00:09:33,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (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 00:09:33,092 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-26 00:09:33,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-26 00:09:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 00:09:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-26 00:09:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 00:09:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 00:09:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 00:09:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-26 00:09:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 00:09:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 00:09:33,096 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 00:09:33,416 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 00:09:33,417 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-26 00:09:33,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:09:33 BoogieIcfgContainer [2020-10-26 00:09:33,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 00:09:33,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 00:09:33,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 00:09:33,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 00:09:33,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 12:09:32" (1/3) ... [2020-10-26 00:09:33,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63aebbf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:09:33, skipping insertion in model container [2020-10-26 00:09:33,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 12:09:32" (2/3) ... [2020-10-26 00:09:33,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63aebbf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 12:09:33, skipping insertion in model container [2020-10-26 00:09:33,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:09:33" (3/3) ... [2020-10-26 00:09:33,433 INFO L111 eAbstractionObserver]: Analyzing ICFG 16_peterson.i [2020-10-26 00:09:33,447 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-26 00:09:33,448 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 00:09:33,454 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-26 00:09:33,455 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-26 00:09:33,485 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,485 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,485 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,486 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,486 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,487 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,487 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,488 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,488 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,488 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,489 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,489 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,490 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,490 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,491 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,491 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,494 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,494 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,495 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~f21~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,495 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,495 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,496 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,496 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~t1~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,496 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-26 00:09:33,502 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-26 00:09:33,519 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-26 00:09:33,546 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 00:09:33,546 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 00:09:33,547 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 00:09:33,547 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 00:09:33,547 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 00:09:33,547 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 00:09:33,548 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 00:09:33,548 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 00:09:33,562 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-26 00:09:33,565 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 69 transitions, 143 flow [2020-10-26 00:09:33,569 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 69 transitions, 143 flow [2020-10-26 00:09:33,571 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 69 transitions, 143 flow [2020-10-26 00:09:33,667 INFO L129 PetriNetUnfolder]: 8/68 cut-off events. [2020-10-26 00:09:33,668 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-26 00:09:33,676 INFO L80 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 68 events. 8/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2020-10-26 00:09:33,682 INFO L116 LiptonReduction]: Number of co-enabled transitions 1302 [2020-10-26 00:09:35,019 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-26 00:09:35,393 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-26 00:09:35,523 INFO L131 LiptonReduction]: Checked pairs total: 2472 [2020-10-26 00:09:35,524 INFO L133 LiptonReduction]: Total number of compositions: 65 [2020-10-26 00:09:35,531 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 22 transitions, 49 flow [2020-10-26 00:09:35,547 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 83 states. [2020-10-26 00:09:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-10-26 00:09:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-26 00:09:35,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:35,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:35,558 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:35,565 INFO L82 PathProgramCache]: Analyzing trace with hash -662943443, now seen corresponding path program 1 times [2020-10-26 00:09:35,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:35,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912355644] [2020-10-26 00:09:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:35,776 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 00:09:35,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912355644] [2020-10-26 00:09:35,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:35,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:09:35,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105453322] [2020-10-26 00:09:35,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:09:35,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:35,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:09:35,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:09:35,809 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 3 states. [2020-10-26 00:09:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:35,854 INFO L93 Difference]: Finished difference Result 90 states and 162 transitions. [2020-10-26 00:09:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:09:35,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-26 00:09:35,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:35,869 INFO L225 Difference]: With dead ends: 90 [2020-10-26 00:09:35,869 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 00:09:35,871 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 00:09:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 00:09:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-26 00:09:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 00:09:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 123 transitions. [2020-10-26 00:09:35,918 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 123 transitions. Word has length 8 [2020-10-26 00:09:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:35,919 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 123 transitions. [2020-10-26 00:09:35,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:09:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 123 transitions. [2020-10-26 00:09:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-26 00:09:35,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:35,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:35,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 00:09:35,922 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:35,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1913374552, now seen corresponding path program 1 times [2020-10-26 00:09:35,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:35,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389328879] [2020-10-26 00:09:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:35,997 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 00:09:35,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389328879] [2020-10-26 00:09:35,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:35,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-26 00:09:35,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601305214] [2020-10-26 00:09:35,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 00:09:36,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 00:09:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 00:09:36,001 INFO L87 Difference]: Start difference. First operand 66 states and 123 transitions. Second operand 3 states. [2020-10-26 00:09:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:36,029 INFO L93 Difference]: Finished difference Result 61 states and 109 transitions. [2020-10-26 00:09:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 00:09:36,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-26 00:09:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:36,033 INFO L225 Difference]: With dead ends: 61 [2020-10-26 00:09:36,033 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 00:09:36,034 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 00:09:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 00:09:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-26 00:09:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 00:09:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 86 transitions. [2020-10-26 00:09:36,041 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 86 transitions. Word has length 8 [2020-10-26 00:09:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:36,042 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 86 transitions. [2020-10-26 00:09:36,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 00:09:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 86 transitions. [2020-10-26 00:09:36,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-26 00:09:36,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:36,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:36,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 00:09:36,044 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:36,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2146806176, now seen corresponding path program 1 times [2020-10-26 00:09:36,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:36,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172442448] [2020-10-26 00:09:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:36,129 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 00:09:36,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172442448] [2020-10-26 00:09:36,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:36,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 00:09:36,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090934488] [2020-10-26 00:09:36,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 00:09:36,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:36,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 00:09:36,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 00:09:36,132 INFO L87 Difference]: Start difference. First operand 49 states and 86 transitions. Second operand 6 states. [2020-10-26 00:09:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:36,243 INFO L93 Difference]: Finished difference Result 70 states and 128 transitions. [2020-10-26 00:09:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 00:09:36,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-26 00:09:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:36,245 INFO L225 Difference]: With dead ends: 70 [2020-10-26 00:09:36,245 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 00:09:36,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 00:09:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 00:09:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-26 00:09:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 00:09:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 65 transitions. [2020-10-26 00:09:36,251 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 65 transitions. Word has length 13 [2020-10-26 00:09:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:36,252 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 65 transitions. [2020-10-26 00:09:36,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 00:09:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 65 transitions. [2020-10-26 00:09:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-26 00:09:36,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 00:09:36,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 00:09:36,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 00:09:36,254 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 00:09:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 00:09:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1089995366, now seen corresponding path program 2 times [2020-10-26 00:09:36,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 00:09:36,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634980528] [2020-10-26 00:09:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 00:09:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 00:09:36,368 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 00:09:36,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634980528] [2020-10-26 00:09:36,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 00:09:36,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 00:09:36,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390291493] [2020-10-26 00:09:36,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 00:09:36,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 00:09:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 00:09:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 00:09:36,371 INFO L87 Difference]: Start difference. First operand 43 states and 65 transitions. Second operand 6 states. [2020-10-26 00:09:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 00:09:36,416 INFO L93 Difference]: Finished difference Result 28 states and 46 transitions. [2020-10-26 00:09:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 00:09:36,416 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-26 00:09:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 00:09:36,417 INFO L225 Difference]: With dead ends: 28 [2020-10-26 00:09:36,417 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 00:09:36,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-26 00:09:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 00:09:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 00:09:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 00:09:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 00:09:36,418 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-10-26 00:09:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 00:09:36,418 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 00:09:36,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 00:09:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 00:09:36,419 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 00:09:36,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 00:09:36,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 12:09:36 BasicIcfg [2020-10-26 00:09:36,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 00:09:36,423 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 00:09:36,423 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 00:09:36,424 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 00:09:36,424 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 12:09:33" (3/4) ... [2020-10-26 00:09:36,428 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-26 00:09:36,435 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2020-10-26 00:09:36,439 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-26 00:09:36,440 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-26 00:09:36,440 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:09:36,440 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-26 00:09:36,490 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 00:09:36,491 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 00:09:36,493 INFO L168 Benchmark]: Toolchain (without parser) took 4252.25 ms. Allocated memory was 67.1 MB in the beginning and 104.9 MB in the end (delta: 37.7 MB). Free memory was 42.7 MB in the beginning and 69.8 MB in the end (delta: -27.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:36,493 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 67.1 MB. Free memory is still 48.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 00:09:36,494 INFO L168 Benchmark]: CACSL2BoogieTranslator took 684.22 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 31.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:36,495 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.19 ms. Allocated memory is still 67.1 MB. Free memory was 31.2 MB in the beginning and 49.2 MB in the end (delta: -18.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:36,497 INFO L168 Benchmark]: Boogie Preprocessor took 28.61 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 48.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:36,499 INFO L168 Benchmark]: RCFGBuilder took 404.30 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 48.0 MB in the beginning and 67.5 MB in the end (delta: -19.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:36,501 INFO L168 Benchmark]: TraceAbstraction took 2999.72 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 67.1 MB in the beginning and 73.0 MB in the end (delta: -5.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:36,502 INFO L168 Benchmark]: Witness Printer took 67.63 ms. Allocated memory is still 104.9 MB. Free memory was 71.9 MB in the beginning and 69.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 00:09:36,508 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 67.1 MB. Free memory is still 48.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 684.22 ms. Allocated memory is still 67.1 MB. Free memory was 41.9 MB in the beginning and 31.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.19 ms. Allocated memory is still 67.1 MB. Free memory was 31.2 MB in the beginning and 49.2 MB in the end (delta: -18.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.61 ms. Allocated memory is still 67.1 MB. Free memory was 49.2 MB in the beginning and 48.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 404.30 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 48.0 MB in the beginning and 67.5 MB in the end (delta: -19.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2999.72 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 67.1 MB in the beginning and 73.0 MB in the end (delta: -5.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * Witness Printer took 67.63 ms. Allocated memory is still 104.9 MB. Free memory was 71.9 MB in the beginning and 69.8 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 913 VarBasedMoverChecksPositive, 45 VarBasedMoverChecksNegative, 13 SemBasedMoverChecksPositive, 32 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 81 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 65 PlacesBefore, 23 PlacesAfterwards, 69 TransitionsBefore, 22 TransitionsAfterwards, 1302 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 5 ChoiceCompositions, 65 TotalNumberOfCompositions, 2472 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, 62 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 104 SDtfs, 77 SDslu, 109 SDs, 0 SdLazy, 93 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred 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: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1110 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...