./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-wmm/safe004_tso.oepc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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-wmm/safe004_tso.oepc.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 5f9b1396844f489e15fac07513801b6ebd902fa1 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 14:37:01,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 14:37:01,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 14:37:01,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 14:37:01,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 14:37:01,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 14:37:01,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 14:37:01,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 14:37:01,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 14:37:01,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 14:37:01,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 14:37:01,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 14:37:01,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 14:37:01,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 14:37:01,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 14:37:01,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 14:37:01,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 14:37:01,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 14:37:01,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 14:37:01,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 14:37:01,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 14:37:01,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 14:37:01,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 14:37:01,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 14:37:01,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 14:37:01,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 14:37:01,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 14:37:01,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 14:37:01,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 14:37:01,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 14:37:01,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 14:37:01,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 14:37:01,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 14:37:01,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 14:37:01,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 14:37:01,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 14:37:01,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 14:37:01,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 14:37:01,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 14:37:01,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 14:37:01,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 14:37:01,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 14:37:01,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 14:37:01,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 14:37:01,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 14:37:01,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 14:37:01,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 14:37:01,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 14:37:01,981 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 14:37:01,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 14:37:01,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 14:37:01,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 14:37:01,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 14:37:01,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 14:37:01,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 14:37:01,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 14:37:01,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 14:37:01,983 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 14:37:01,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 14:37:01,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 14:37:01,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 14:37:01,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 14:37:01,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 14:37:01,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 14:37:01,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 14:37:01,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 14:37:01,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 14:37:01,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 14:37:01,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 14:37:01,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 14:37:01,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 14:37:01,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 14:37:01,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f9b1396844f489e15fac07513801b6ebd902fa1 [2021-08-26 14:37:02,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 14:37:02,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 14:37:02,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 14:37:02,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 14:37:02,238 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 14:37:02,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe004_tso.oepc.i [2021-08-26 14:37:02,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8363e08c/2e3b0b7bb88444bfbcafca0e6afa6cdc/FLAGdfcafafdd [2021-08-26 14:37:02,681 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 14:37:02,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe004_tso.oepc.i [2021-08-26 14:37:02,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8363e08c/2e3b0b7bb88444bfbcafca0e6afa6cdc/FLAGdfcafafdd [2021-08-26 14:37:02,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8363e08c/2e3b0b7bb88444bfbcafca0e6afa6cdc [2021-08-26 14:37:02,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 14:37:02,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 14:37:02,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 14:37:02,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 14:37:02,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 14:37:02,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:37:02" (1/1) ... [2021-08-26 14:37:02,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68cde4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:02, skipping insertion in model container [2021-08-26 14:37:02,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:37:02" (1/1) ... [2021-08-26 14:37:02,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 14:37:02,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 14:37:02,908 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe004_tso.oepc.i[950,963] [2021-08-26 14:37:03,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 14:37:03,031 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 14:37:03,040 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe004_tso.oepc.i[950,963] [2021-08-26 14:37:03,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 14:37:03,103 INFO L208 MainTranslator]: Completed translation [2021-08-26 14:37:03,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03 WrapperNode [2021-08-26 14:37:03,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 14:37:03,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 14:37:03,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 14:37:03,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 14:37:03,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 14:37:03,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 14:37:03,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 14:37:03,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 14:37:03,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 14:37:03,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 14:37:03,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 14:37:03,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 14:37:03,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (1/1) ... [2021-08-26 14:37:03,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 14:37:03,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 14:37:03,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 14:37:03,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 14:37:03,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 14:37:03,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-26 14:37:03,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 14:37:03,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 14:37:03,254 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-08-26 14:37:03,254 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-08-26 14:37:03,254 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-08-26 14:37:03,254 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-08-26 14:37:03,255 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-08-26 14:37:03,255 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-08-26 14:37:03,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 14:37:03,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-26 14:37:03,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 14:37:03,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 14:37:03,256 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-26 14:37:03,578 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 14:37:03,578 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 14:37:03,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:37:03 BoogieIcfgContainer [2021-08-26 14:37:03,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 14:37:03,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 14:37:03,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 14:37:03,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 14:37:03,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:37:02" (1/3) ... [2021-08-26 14:37:03,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6968530c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:37:03, skipping insertion in model container [2021-08-26 14:37:03,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:37:03" (2/3) ... [2021-08-26 14:37:03,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6968530c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:37:03, skipping insertion in model container [2021-08-26 14:37:03,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:37:03" (3/3) ... [2021-08-26 14:37:03,586 INFO L111 eAbstractionObserver]: Analyzing ICFG safe004_tso.oepc.i [2021-08-26 14:37:03,590 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-26 14:37:03,590 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 14:37:03,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 14:37:03,590 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-26 14:37:03,616 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,617 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,617 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,619 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,619 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,619 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,640 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,641 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,641 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,641 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,641 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,641 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,642 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,642 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,642 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,643 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,644 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,644 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,644 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,644 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,645 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,645 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,645 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,646 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,649 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,649 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,649 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,649 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,649 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,650 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,650 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,650 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,651 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,651 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,651 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,651 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,654 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,654 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,654 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,655 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,659 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,659 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,659 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,659 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,661 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,662 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,662 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,662 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-26 14:37:03,664 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-26 14:37:03,697 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 14:37:03,702 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 14:37:03,702 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-26 14:37:03,713 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-08-26 14:37:03,720 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 83 transitions, 181 flow [2021-08-26 14:37:03,722 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 83 transitions, 181 flow [2021-08-26 14:37:03,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 91 places, 83 transitions, 181 flow [2021-08-26 14:37:03,768 INFO L129 PetriNetUnfolder]: 2/80 cut-off events. [2021-08-26 14:37:03,768 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-26 14:37:03,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 80 events. 2/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2021-08-26 14:37:03,775 INFO L116 LiptonReduction]: Number of co-enabled transitions 1440 [2021-08-26 14:37:05,956 INFO L131 LiptonReduction]: Checked pairs total: 2586 [2021-08-26 14:37:05,956 INFO L133 LiptonReduction]: Total number of compositions: 72 [2021-08-26 14:37:05,961 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 61 flow [2021-08-26 14:37:05,977 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 298 states, 297 states have (on average 3.1245791245791246) internal successors, (928), 297 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 298 states, 297 states have (on average 3.1245791245791246) internal successors, (928), 297 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 14:37:05,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:37:05,984 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:37:05,984 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-26 14:37:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:37:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -907350008, now seen corresponding path program 1 times [2021-08-26 14:37:05,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:37:05,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325527184] [2021-08-26 14:37:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:37:05,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:37:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:37:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:37:06,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:37:06,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325527184] [2021-08-26 14:37:06,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325527184] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:37:06,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:37:06,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 14:37:06,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071041431] [2021-08-26 14:37:06,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 14:37:06,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:37:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 14:37:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 14:37:06,121 INFO L87 Difference]: Start difference. First operand has 298 states, 297 states have (on average 3.1245791245791246) internal successors, (928), 297 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:37:06,136 INFO L93 Difference]: Finished difference Result 298 states and 864 transitions. [2021-08-26 14:37:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 14:37:06,137 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-08-26 14:37:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:37:06,146 INFO L225 Difference]: With dead ends: 298 [2021-08-26 14:37:06,146 INFO L226 Difference]: Without dead ends: 298 [2021-08-26 14:37:06,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 14:37:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-26 14:37:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-08-26 14:37:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.909090909090909) internal successors, (864), 297 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 864 transitions. [2021-08-26 14:37:06,183 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 864 transitions. Word has length 8 [2021-08-26 14:37:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:37:06,184 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 864 transitions. [2021-08-26 14:37:06,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 864 transitions. [2021-08-26 14:37:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 14:37:06,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:37:06,185 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:37:06,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 14:37:06,185 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-26 14:37:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:37:06,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1936916700, now seen corresponding path program 1 times [2021-08-26 14:37:06,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:37:06,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470636727] [2021-08-26 14:37:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:37:06,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:37:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:37:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:37:06,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:37:06,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470636727] [2021-08-26 14:37:06,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470636727] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:37:06,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:37:06,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 14:37:06,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918885210] [2021-08-26 14:37:06,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 14:37:06,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:37:06,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 14:37:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 14:37:06,343 INFO L87 Difference]: Start difference. First operand 298 states and 864 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:37:06,379 INFO L93 Difference]: Finished difference Result 487 states and 1377 transitions. [2021-08-26 14:37:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 14:37:06,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-26 14:37:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:37:06,382 INFO L225 Difference]: With dead ends: 487 [2021-08-26 14:37:06,382 INFO L226 Difference]: Without dead ends: 312 [2021-08-26 14:37:06,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 14:37:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-26 14:37:06,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 262. [2021-08-26 14:37:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.574712643678161) internal successors, (672), 261 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 672 transitions. [2021-08-26 14:37:06,393 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 672 transitions. Word has length 9 [2021-08-26 14:37:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:37:06,393 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 672 transitions. [2021-08-26 14:37:06,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 672 transitions. [2021-08-26 14:37:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 14:37:06,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:37:06,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:37:06,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 14:37:06,395 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-26 14:37:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:37:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash -860080890, now seen corresponding path program 1 times [2021-08-26 14:37:06,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:37:06,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927703739] [2021-08-26 14:37:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:37:06,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:37:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:37:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:37:06,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:37:06,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927703739] [2021-08-26 14:37:06,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927703739] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:37:06,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:37:06,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 14:37:06,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927960136] [2021-08-26 14:37:06,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 14:37:06,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:37:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 14:37:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 14:37:06,450 INFO L87 Difference]: Start difference. First operand 262 states and 672 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:37:06,499 INFO L93 Difference]: Finished difference Result 343 states and 850 transitions. [2021-08-26 14:37:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 14:37:06,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 14:37:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:37:06,501 INFO L225 Difference]: With dead ends: 343 [2021-08-26 14:37:06,501 INFO L226 Difference]: Without dead ends: 248 [2021-08-26 14:37:06,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-26 14:37:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-26 14:37:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 212. [2021-08-26 14:37:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.5071090047393363) internal successors, (529), 211 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 529 transitions. [2021-08-26 14:37:06,508 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 529 transitions. Word has length 10 [2021-08-26 14:37:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:37:06,508 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 529 transitions. [2021-08-26 14:37:06,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,509 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 529 transitions. [2021-08-26 14:37:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 14:37:06,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:37:06,510 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:37:06,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 14:37:06,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-26 14:37:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:37:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1655230867, now seen corresponding path program 1 times [2021-08-26 14:37:06,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:37:06,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421204046] [2021-08-26 14:37:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:37:06,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:37:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:37:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:37:06,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:37:06,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421204046] [2021-08-26 14:37:06,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421204046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:37:06,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:37:06,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 14:37:06,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227053816] [2021-08-26 14:37:06,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 14:37:06,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:37:06,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 14:37:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 14:37:06,563 INFO L87 Difference]: Start difference. First operand 212 states and 529 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:37:06,603 INFO L93 Difference]: Finished difference Result 307 states and 727 transitions. [2021-08-26 14:37:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 14:37:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 14:37:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:37:06,604 INFO L225 Difference]: With dead ends: 307 [2021-08-26 14:37:06,604 INFO L226 Difference]: Without dead ends: 180 [2021-08-26 14:37:06,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-26 14:37:06,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-26 14:37:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2021-08-26 14:37:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2582781456953644) internal successors, (341), 151 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 341 transitions. [2021-08-26 14:37:06,609 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 341 transitions. Word has length 11 [2021-08-26 14:37:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:37:06,609 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 341 transitions. [2021-08-26 14:37:06,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 341 transitions. [2021-08-26 14:37:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 14:37:06,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:37:06,610 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:37:06,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 14:37:06,610 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-26 14:37:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:37:06,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1666001007, now seen corresponding path program 1 times [2021-08-26 14:37:06,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:37:06,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096934759] [2021-08-26 14:37:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:37:06,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:37:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:37:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:37:06,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:37:06,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096934759] [2021-08-26 14:37:06,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096934759] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:37:06,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:37:06,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 14:37:06,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468037396] [2021-08-26 14:37:06,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 14:37:06,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:37:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 14:37:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 14:37:06,660 INFO L87 Difference]: Start difference. First operand 152 states and 341 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:37:06,690 INFO L93 Difference]: Finished difference Result 177 states and 384 transitions. [2021-08-26 14:37:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 14:37:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 14:37:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:37:06,691 INFO L225 Difference]: With dead ends: 177 [2021-08-26 14:37:06,691 INFO L226 Difference]: Without dead ends: 140 [2021-08-26 14:37:06,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-26 14:37:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-26 14:37:06,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 124. [2021-08-26 14:37:06,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.16260162601626) internal successors, (266), 123 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 266 transitions. [2021-08-26 14:37:06,696 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 266 transitions. Word has length 12 [2021-08-26 14:37:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:37:06,696 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 266 transitions. [2021-08-26 14:37:06,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 266 transitions. [2021-08-26 14:37:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 14:37:06,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:37:06,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:37:06,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-26 14:37:06,698 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-26 14:37:06,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:37:06,698 INFO L82 PathProgramCache]: Analyzing trace with hash -107561769, now seen corresponding path program 1 times [2021-08-26 14:37:06,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:37:06,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734839843] [2021-08-26 14:37:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:37:06,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:37:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:37:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:37:06,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:37:06,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734839843] [2021-08-26 14:37:06,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734839843] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:37:06,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:37:06,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 14:37:06,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710637357] [2021-08-26 14:37:06,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 14:37:06,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:37:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 14:37:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 14:37:06,769 INFO L87 Difference]: Start difference. First operand 124 states and 266 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:37:06,830 INFO L93 Difference]: Finished difference Result 130 states and 267 transitions. [2021-08-26 14:37:06,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 14:37:06,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-26 14:37:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:37:06,831 INFO L225 Difference]: With dead ends: 130 [2021-08-26 14:37:06,831 INFO L226 Difference]: Without dead ends: 64 [2021-08-26 14:37:06,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-26 14:37:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-26 14:37:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-26 14:37:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 63 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 128 transitions. [2021-08-26 14:37:06,833 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 128 transitions. Word has length 13 [2021-08-26 14:37:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:37:06,834 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 128 transitions. [2021-08-26 14:37:06,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 128 transitions. [2021-08-26 14:37:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 14:37:06,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:37:06,834 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:37:06,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-26 14:37:06,835 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-26 14:37:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:37:06,835 INFO L82 PathProgramCache]: Analyzing trace with hash 810098199, now seen corresponding path program 1 times [2021-08-26 14:37:06,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:37:06,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030899115] [2021-08-26 14:37:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:37:06,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:37:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:37:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:37:06,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:37:06,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030899115] [2021-08-26 14:37:06,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030899115] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:37:06,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:37:06,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 14:37:06,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536686467] [2021-08-26 14:37:06,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 14:37:06,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:37:06,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 14:37:06,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:37:06,868 INFO L87 Difference]: Start difference. First operand 64 states and 128 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:37:06,873 INFO L93 Difference]: Finished difference Result 52 states and 91 transitions. [2021-08-26 14:37:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 14:37:06,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 14:37:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:37:06,874 INFO L225 Difference]: With dead ends: 52 [2021-08-26 14:37:06,874 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 14:37:06,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 14:37:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 14:37:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-26 14:37:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 51 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 91 transitions. [2021-08-26 14:37:06,876 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 91 transitions. Word has length 14 [2021-08-26 14:37:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:37:06,876 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 91 transitions. [2021-08-26 14:37:06,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 91 transitions. [2021-08-26 14:37:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 14:37:06,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:37:06,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:37:06,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-26 14:37:06,877 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-26 14:37:06,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:37:06,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2102468891, now seen corresponding path program 1 times [2021-08-26 14:37:06,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:37:06,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301780838] [2021-08-26 14:37:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:37:06,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:37:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:37:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:37:06,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:37:06,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301780838] [2021-08-26 14:37:06,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301780838] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:37:06,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:37:06,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 14:37:06,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914979221] [2021-08-26 14:37:06,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 14:37:06,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:37:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 14:37:06,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 14:37:06,908 INFO L87 Difference]: Start difference. First operand 52 states and 91 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:37:06,916 INFO L93 Difference]: Finished difference Result 34 states and 49 transitions. [2021-08-26 14:37:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 14:37:06,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 14:37:06,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:37:06,917 INFO L225 Difference]: With dead ends: 34 [2021-08-26 14:37:06,918 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 14:37:06,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 14:37:06,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 14:37:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-26 14:37:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2021-08-26 14:37:06,920 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 15 [2021-08-26 14:37:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:37:06,920 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2021-08-26 14:37:06,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2021-08-26 14:37:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 14:37:06,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 14:37:06,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 14:37:06,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-26 14:37:06,921 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-26 14:37:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 14:37:06,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1333270741, now seen corresponding path program 1 times [2021-08-26 14:37:06,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 14:37:06,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064937834] [2021-08-26 14:37:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 14:37:06,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 14:37:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 14:37:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 14:37:06,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 14:37:06,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064937834] [2021-08-26 14:37:06,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064937834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 14:37:06,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 14:37:06,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 14:37:06,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157879948] [2021-08-26 14:37:06,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 14:37:06,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 14:37:06,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 14:37:06,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 14:37:06,958 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 14:37:06,965 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2021-08-26 14:37:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 14:37:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 14:37:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 14:37:06,966 INFO L225 Difference]: With dead ends: 26 [2021-08-26 14:37:06,966 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 14:37:06,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 14:37:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 14:37:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 14:37:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 14:37:06,967 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-08-26 14:37:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 14:37:06,967 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 14:37:06,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 14:37:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 14:37:06,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 14:37:06,969 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 14:37:06,970 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-26 14:37:06,970 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-26 14:37:06,970 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-26 14:37:06,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-26 14:37:06,972 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-26 14:37:06,972 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 14:37:06,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:37:06 BasicIcfg [2021-08-26 14:37:06,974 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 14:37:06,974 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 14:37:06,974 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 14:37:06,974 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 14:37:06,975 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:37:03" (3/4) ... [2021-08-26 14:37:06,976 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 14:37:06,980 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2021-08-26 14:37:06,980 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2021-08-26 14:37:06,980 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2021-08-26 14:37:06,983 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-08-26 14:37:06,983 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 14:37:06,983 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 14:37:06,984 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 14:37:07,003 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 14:37:07,003 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 14:37:07,004 INFO L168 Benchmark]: Toolchain (without parser) took 4296.35 ms. Allocated memory was 54.5 MB in the beginning and 165.7 MB in the end (delta: 111.1 MB). Free memory was 30.5 MB in the beginning and 89.6 MB in the end (delta: -59.1 MB). Peak memory consumption was 52.7 MB. Max. memory is 16.1 GB. [2021-08-26 14:37:07,004 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.1 MB in the end (delta: 34.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 14:37:07,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.90 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 30.3 MB in the beginning and 43.0 MB in the end (delta: -12.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-08-26 14:37:07,005 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.41 ms. Allocated memory is still 69.2 MB. Free memory was 42.7 MB in the beginning and 40.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:37:07,005 INFO L168 Benchmark]: Boogie Preprocessor took 41.89 ms. Allocated memory is still 69.2 MB. Free memory was 40.8 MB in the beginning and 39.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 14:37:07,005 INFO L168 Benchmark]: RCFGBuilder took 385.07 ms. Allocated memory is still 69.2 MB. Free memory was 39.4 MB in the beginning and 35.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 14:37:07,005 INFO L168 Benchmark]: TraceAbstraction took 3391.42 ms. Allocated memory was 69.2 MB in the beginning and 165.7 MB in the end (delta: 96.5 MB). Free memory was 35.0 MB in the beginning and 91.7 MB in the end (delta: -56.7 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. [2021-08-26 14:37:07,006 INFO L168 Benchmark]: Witness Printer took 28.92 ms. Allocated memory is still 165.7 MB. Free memory was 91.7 MB in the beginning and 89.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 14:37:07,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.1 MB in the end (delta: 34.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 396.90 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 30.3 MB in the beginning and 43.0 MB in the end (delta: -12.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.41 ms. Allocated memory is still 69.2 MB. Free memory was 42.7 MB in the beginning and 40.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.89 ms. Allocated memory is still 69.2 MB. Free memory was 40.8 MB in the beginning and 39.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 385.07 ms. Allocated memory is still 69.2 MB. Free memory was 39.4 MB in the beginning and 35.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3391.42 ms. Allocated memory was 69.2 MB in the beginning and 165.7 MB in the end (delta: 96.5 MB). Free memory was 35.0 MB in the beginning and 91.7 MB in the end (delta: -56.7 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. * Witness Printer took 28.92 ms. Allocated memory is still 165.7 MB. Free memory was 91.7 MB in the beginning and 89.6 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 Lipton Reduction Statistics: ReductionTime: 2233.9ms, 91 PlacesBefore, 32 PlacesAfterwards, 83 TransitionsBefore, 23 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 5 FixpointIterations, 19 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 1 ChoiceCompositions, 72 TotalNumberOfCompositions, 2586 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1456, positive: 1379, positive conditional: 0, positive unconditional: 1379, negative: 77, negative conditional: 0, negative unconditional: 77, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 977, positive: 946, positive conditional: 0, positive unconditional: 946, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 977, positive: 940, positive conditional: 0, positive unconditional: 940, negative: 37, negative conditional: 0, negative unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 37, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 31, negative conditional: 0, negative unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 61, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1456, positive: 433, positive conditional: 0, positive unconditional: 433, negative: 46, negative conditional: 0, negative unconditional: 46, unknown: 977, unknown conditional: 0, unknown unconditional: 977] , Statistics on independence cache: Total cache size (in pairs): 83, Positive cache size: 73, Positive conditional cache size: 0, Positive unconditional cache size: 73, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 106 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 3275.9ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 11.3ms, AutomataDifference: 295.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2275.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 198 SDtfs, 246 SDslu, 250 SDs, 0 SdLazy, 110 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 174.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=0, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 57.5ms AutomataMinimizationTime, 9 MinimizatonAttempts, 130 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 14.6ms SsaConstructionTime, 103.1ms SatisfiabilityAnalysisTime, 373.8ms InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 477 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-26 14:37:07,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...