./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/weaver/popl20-send-receive-alt.wvr.c -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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:49:04,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:49:04,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:49:04,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:49:04,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:49:04,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:49:04,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:49:04,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:49:04,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:49:04,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:49:04,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:49:04,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:49:04,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:49:04,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:49:04,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:49:04,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:49:04,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:49:04,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:49:04,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:49:04,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:49:04,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:49:04,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:49:04,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:49:04,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:49:04,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:49:04,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:49:04,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:49:04,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:49:04,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:49:04,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:49:04,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:49:04,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:49:04,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:49:04,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:49:04,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:49:04,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:49:04,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:49:04,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:49:04,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:49:04,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:49:04,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:49:04,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:49:04,996 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:49:04,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:49:04,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:49:04,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:49:04,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:49:04,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:49:04,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:49:04,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:49:04,998 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:49:04,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:49:04,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:49:05,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:49:05,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:49:05,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:49:05,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:49:05,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:49:05,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:49:05,001 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:49:05,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:49:05,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:49:05,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:49:05,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:49:05,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:49:05,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:49:05,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:49:05,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:49:05,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:49:05,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:49:05,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:49:05,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:49:05,004 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:49:05,004 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:49:05,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:49:05,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:49:05,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2021-12-22 13:49:05,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:49:05,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:49:05,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:49:05,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:49:05,234 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:49:05,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-12-22 13:49:05,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d3f92f4c/07b90da17eeb4fbf9a35976b5f41cdbc/FLAG2c73f0bcf [2021-12-22 13:49:05,705 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:49:05,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2021-12-22 13:49:05,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d3f92f4c/07b90da17eeb4fbf9a35976b5f41cdbc/FLAG2c73f0bcf [2021-12-22 13:49:06,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d3f92f4c/07b90da17eeb4fbf9a35976b5f41cdbc [2021-12-22 13:49:06,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:49:06,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:49:06,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:49:06,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:49:06,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:49:06,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362f8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06, skipping insertion in model container [2021-12-22 13:49:06,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:49:06,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:49:06,317 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2021-12-22 13:49:06,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:49:06,343 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:49:06,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2021-12-22 13:49:06,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:49:06,399 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:49:06,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06 WrapperNode [2021-12-22 13:49:06,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:49:06,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:49:06,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:49:06,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:49:06,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,451 INFO L137 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2021-12-22 13:49:06,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:49:06,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:49:06,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:49:06,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:49:06,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:49:06,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:49:06,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:49:06,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:49:06,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (1/1) ... [2021-12-22 13:49:06,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:49:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:06,545 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) [2021-12-22 13:49:06,566 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 [2021-12-22 13:49:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:49:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:49:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:49:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:49:06,580 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:49:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:49:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:49:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:49:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:49:06,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:49:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:49:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:49:06,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:49:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:49:06,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:49:06,584 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:49:06,698 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:49:06,704 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:49:06,971 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:49:07,027 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:49:07,027 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 13:49:07,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:49:07 BoogieIcfgContainer [2021-12-22 13:49:07,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:49:07,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:49:07,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:49:07,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:49:07,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:49:06" (1/3) ... [2021-12-22 13:49:07,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9482c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:49:07, skipping insertion in model container [2021-12-22 13:49:07,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:49:06" (2/3) ... [2021-12-22 13:49:07,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9482c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:49:07, skipping insertion in model container [2021-12-22 13:49:07,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:49:07" (3/3) ... [2021-12-22 13:49:07,049 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2021-12-22 13:49:07,053 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:49:07,053 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:49:07,053 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:49:07,053 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:49:07,083 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,084 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,085 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,085 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,085 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,086 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,086 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,086 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,087 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,087 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,087 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,087 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,087 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,088 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,089 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,089 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,090 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,090 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,095 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,096 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,098 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,098 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,098 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,099 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,099 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,099 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,099 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,099 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,100 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,100 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,100 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,101 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,101 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,101 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,101 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,102 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,102 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,102 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,102 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,102 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,103 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,103 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,103 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,104 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,104 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,105 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,106 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,106 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,106 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,106 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,107 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,107 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,107 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,107 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,108 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,108 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,108 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,108 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,108 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,109 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,109 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,109 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,112 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,112 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,112 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,112 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,112 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,113 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,113 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~b~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,113 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,119 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,120 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,121 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,123 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,124 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,124 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,124 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,125 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,125 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:49:07,127 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:49:07,181 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:49:07,190 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-22 13:49:07,190 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:49:07,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2021-12-22 13:49:07,268 INFO L129 PetriNetUnfolder]: 11/131 cut-off events. [2021-12-22 13:49:07,271 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:49:07,274 INFO L84 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2021-12-22 13:49:07,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2021-12-22 13:49:07,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2021-12-22 13:49:07,302 INFO L129 PetriNetUnfolder]: 11/121 cut-off events. [2021-12-22 13:49:07,302 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:49:07,302 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:07,306 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:07,307 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:07,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1382683983, now seen corresponding path program 1 times [2021-12-22 13:49:07,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:07,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286400877] [2021-12-22 13:49:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:07,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:07,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:07,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286400877] [2021-12-22 13:49:07,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286400877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:07,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:07,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:49:07,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307064663] [2021-12-22 13:49:07,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:07,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:49:07,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:49:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:49:07,607 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 133 [2021-12-22 13:49:07,611 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 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) [2021-12-22 13:49:07,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:07,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 133 [2021-12-22 13:49:07,612 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:07,658 INFO L129 PetriNetUnfolder]: 8/122 cut-off events. [2021-12-22 13:49:07,659 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-12-22 13:49:07,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 122 events. 8/122 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 1 based on Foata normal form. 10/122 useless extension candidates. Maximal degree in co-relation 83. Up to 13 conditions per place. [2021-12-22 13:49:07,662 INFO L132 encePairwiseOnDemand]: 126/133 looper letters, 7 selfloop transitions, 0 changer transitions 3/115 dead transitions. [2021-12-22 13:49:07,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 256 flow [2021-12-22 13:49:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:49:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:49:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2021-12-22 13:49:07,680 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9398496240601504 [2021-12-22 13:49:07,681 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2021-12-22 13:49:07,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2021-12-22 13:49:07,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:07,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2021-12-22 13:49:07,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 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) [2021-12-22 13:49:07,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2021-12-22 13:49:07,697 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2021-12-22 13:49:07,699 INFO L186 Difference]: Start difference. First operand has 118 places, 122 transitions, 256 flow. Second operand 2 states and 250 transitions. [2021-12-22 13:49:07,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 256 flow [2021-12-22 13:49:07,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 115 transitions, 248 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:49:07,708 INFO L242 Difference]: Finished difference. Result has 115 places, 112 transitions, 228 flow [2021-12-22 13:49:07,710 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=228, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2021-12-22 13:49:07,714 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, -3 predicate places. [2021-12-22 13:49:07,715 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 228 flow [2021-12-22 13:49:07,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.5) internal successors, (243), 2 states have internal predecessors, (243), 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) [2021-12-22 13:49:07,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:07,716 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:07,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:49:07,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:07,719 INFO L85 PathProgramCache]: Analyzing trace with hash 882365775, now seen corresponding path program 1 times [2021-12-22 13:49:07,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:07,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936579069] [2021-12-22 13:49:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:07,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:07,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:07,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936579069] [2021-12-22 13:49:07,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936579069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:07,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:07,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:49:07,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436225592] [2021-12-22 13:49:07,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:07,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:49:07,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:07,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:49:07,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:49:07,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 133 [2021-12-22 13:49:07,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 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) [2021-12-22 13:49:07,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:07,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 133 [2021-12-22 13:49:07,951 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:08,055 INFO L129 PetriNetUnfolder]: 13/157 cut-off events. [2021-12-22 13:49:08,056 INFO L130 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2021-12-22 13:49:08,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 157 events. 13/157 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 261 event pairs, 1 based on Foata normal form. 2/149 useless extension candidates. Maximal degree in co-relation 199. Up to 19 conditions per place. [2021-12-22 13:49:08,059 INFO L132 encePairwiseOnDemand]: 128/133 looper letters, 23 selfloop transitions, 2 changer transitions 4/121 dead transitions. [2021-12-22 13:49:08,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 121 transitions, 307 flow [2021-12-22 13:49:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:49:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:49:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 540 transitions. [2021-12-22 13:49:08,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2021-12-22 13:49:08,065 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 540 transitions. [2021-12-22 13:49:08,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 540 transitions. [2021-12-22 13:49:08,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:08,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 540 transitions. [2021-12-22 13:49:08,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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) [2021-12-22 13:49:08,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 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) [2021-12-22 13:49:08,072 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 133.0) internal successors, (798), 6 states have internal predecessors, (798), 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) [2021-12-22 13:49:08,072 INFO L186 Difference]: Start difference. First operand has 115 places, 112 transitions, 228 flow. Second operand 5 states and 540 transitions. [2021-12-22 13:49:08,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 121 transitions, 307 flow [2021-12-22 13:49:08,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 121 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:49:08,077 INFO L242 Difference]: Finished difference. Result has 119 places, 113 transitions, 244 flow [2021-12-22 13:49:08,078 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2021-12-22 13:49:08,078 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2021-12-22 13:49:08,079 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 244 flow [2021-12-22 13:49:08,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 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) [2021-12-22 13:49:08,079 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:08,080 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:08,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:49:08,080 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1024793816, now seen corresponding path program 1 times [2021-12-22 13:49:08,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:08,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414608964] [2021-12-22 13:49:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:08,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:08,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:08,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414608964] [2021-12-22 13:49:08,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414608964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:08,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:08,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:49:08,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974850162] [2021-12-22 13:49:08,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:08,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:49:08,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:49:08,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:49:08,277 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 133 [2021-12-22 13:49:08,278 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2021-12-22 13:49:08,278 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:08,278 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 133 [2021-12-22 13:49:08,279 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:08,337 INFO L129 PetriNetUnfolder]: 18/188 cut-off events. [2021-12-22 13:49:08,337 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-12-22 13:49:08,338 INFO L84 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 188 events. 18/188 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 350 event pairs, 3 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 240. Up to 30 conditions per place. [2021-12-22 13:49:08,338 INFO L132 encePairwiseOnDemand]: 127/133 looper letters, 14 selfloop transitions, 5 changer transitions 2/118 dead transitions. [2021-12-22 13:49:08,338 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 118 transitions, 298 flow [2021-12-22 13:49:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:49:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:49:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2021-12-22 13:49:08,341 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8796992481203008 [2021-12-22 13:49:08,341 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2021-12-22 13:49:08,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2021-12-22 13:49:08,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:08,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2021-12-22 13:49:08,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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) [2021-12-22 13:49:08,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-12-22 13:49:08,344 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-12-22 13:49:08,344 INFO L186 Difference]: Start difference. First operand has 119 places, 113 transitions, 244 flow. Second operand 3 states and 351 transitions. [2021-12-22 13:49:08,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 118 transitions, 298 flow [2021-12-22 13:49:08,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 292 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-22 13:49:08,352 INFO L242 Difference]: Finished difference. Result has 117 places, 115 transitions, 263 flow [2021-12-22 13:49:08,352 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2021-12-22 13:49:08,354 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2021-12-22 13:49:08,354 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 263 flow [2021-12-22 13:49:08,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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) [2021-12-22 13:49:08,355 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:08,355 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:08,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:49:08,356 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash 315089418, now seen corresponding path program 1 times [2021-12-22 13:49:08,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:08,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365169579] [2021-12-22 13:49:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:08,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:08,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:08,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365169579] [2021-12-22 13:49:08,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365169579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:08,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:08,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:49:08,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722550137] [2021-12-22 13:49:08,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:08,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:49:08,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:49:08,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:49:08,482 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2021-12-22 13:49:08,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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) [2021-12-22 13:49:08,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:08,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2021-12-22 13:49:08,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:08,542 INFO L129 PetriNetUnfolder]: 29/229 cut-off events. [2021-12-22 13:49:08,542 INFO L130 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2021-12-22 13:49:08,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 229 events. 29/229 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 673 event pairs, 7 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 322. Up to 46 conditions per place. [2021-12-22 13:49:08,545 INFO L132 encePairwiseOnDemand]: 130/133 looper letters, 16 selfloop transitions, 2 changer transitions 1/120 dead transitions. [2021-12-22 13:49:08,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 120 transitions, 316 flow [2021-12-22 13:49:08,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:49:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:49:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2021-12-22 13:49:08,547 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2021-12-22 13:49:08,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2021-12-22 13:49:08,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2021-12-22 13:49:08,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:08,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2021-12-22 13:49:08,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 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) [2021-12-22 13:49:08,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-12-22 13:49:08,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 133.0) internal successors, (532), 4 states have internal predecessors, (532), 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) [2021-12-22 13:49:08,551 INFO L186 Difference]: Start difference. First operand has 117 places, 115 transitions, 263 flow. Second operand 3 states and 360 transitions. [2021-12-22 13:49:08,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 120 transitions, 316 flow [2021-12-22 13:49:08,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 120 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:49:08,557 INFO L242 Difference]: Finished difference. Result has 119 places, 115 transitions, 266 flow [2021-12-22 13:49:08,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2021-12-22 13:49:08,558 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2021-12-22 13:49:08,559 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 266 flow [2021-12-22 13:49:08,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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) [2021-12-22 13:49:08,559 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:08,559 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:08,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:49:08,560 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:08,561 INFO L85 PathProgramCache]: Analyzing trace with hash -93519548, now seen corresponding path program 1 times [2021-12-22 13:49:08,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:08,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952990866] [2021-12-22 13:49:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:08,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:08,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:08,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952990866] [2021-12-22 13:49:08,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952990866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:08,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:08,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:49:08,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804026810] [2021-12-22 13:49:08,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:08,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:49:08,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:08,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:49:08,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:49:08,700 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 133 [2021-12-22 13:49:08,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 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) [2021-12-22 13:49:08,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:08,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 133 [2021-12-22 13:49:08,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:08,824 INFO L129 PetriNetUnfolder]: 24/281 cut-off events. [2021-12-22 13:49:08,826 INFO L130 PetriNetUnfolder]: For 50/54 co-relation queries the response was YES. [2021-12-22 13:49:08,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 281 events. 24/281 cut-off events. For 50/54 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 878 event pairs, 12 based on Foata normal form. 3/266 useless extension candidates. Maximal degree in co-relation 398. Up to 45 conditions per place. [2021-12-22 13:49:08,829 INFO L132 encePairwiseOnDemand]: 125/133 looper letters, 22 selfloop transitions, 6 changer transitions 9/128 dead transitions. [2021-12-22 13:49:08,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 128 transitions, 376 flow [2021-12-22 13:49:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:49:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:49:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 756 transitions. [2021-12-22 13:49:08,832 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8120300751879699 [2021-12-22 13:49:08,832 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 756 transitions. [2021-12-22 13:49:08,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 756 transitions. [2021-12-22 13:49:08,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:08,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 756 transitions. [2021-12-22 13:49:08,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 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) [2021-12-22 13:49:08,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 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) [2021-12-22 13:49:08,840 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 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) [2021-12-22 13:49:08,840 INFO L186 Difference]: Start difference. First operand has 119 places, 115 transitions, 266 flow. Second operand 7 states and 756 transitions. [2021-12-22 13:49:08,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 128 transitions, 376 flow [2021-12-22 13:49:08,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 128 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:49:08,843 INFO L242 Difference]: Finished difference. Result has 126 places, 116 transitions, 286 flow [2021-12-22 13:49:08,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=126, PETRI_TRANSITIONS=116} [2021-12-22 13:49:08,845 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 8 predicate places. [2021-12-22 13:49:08,846 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 116 transitions, 286 flow [2021-12-22 13:49:08,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 105.83333333333333) internal successors, (635), 6 states have internal predecessors, (635), 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) [2021-12-22 13:49:08,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:08,847 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:08,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:49:08,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1414783415, now seen corresponding path program 1 times [2021-12-22 13:49:08,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:08,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901130395] [2021-12-22 13:49:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:08,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:49:09,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:09,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901130395] [2021-12-22 13:49:09,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901130395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:09,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559946929] [2021-12-22 13:49:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:09,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:09,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:09,063 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:09,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:49:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:09,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-22 13:49:09,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:09,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:49:09,876 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 13:49:09,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 13:49:10,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 13:49:10,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:49:10,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:49:10,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-22 13:49:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:10,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:12,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:49:12,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 72 [2021-12-22 13:49:12,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:49:12,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 494 treesize of output 462 [2021-12-22 13:49:12,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:49:12,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 446 treesize of output 390 [2021-12-22 13:49:12,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:49:12,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 374 treesize of output 354 [2021-12-22 13:49:13,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 13:49:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:13,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559946929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:13,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:13,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 25] total 51 [2021-12-22 13:49:13,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184074149] [2021-12-22 13:49:13,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:13,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-22 13:49:13,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-22 13:49:13,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=1882, Unknown=56, NotChecked=0, Total=2550 [2021-12-22 13:49:13,864 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 133 [2021-12-22 13:49:13,867 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 116 transitions, 286 flow. Second operand has 51 states, 51 states have (on average 61.80392156862745) internal successors, (3152), 51 states have internal predecessors, (3152), 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) [2021-12-22 13:49:13,867 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:13,867 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 133 [2021-12-22 13:49:13,867 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:15,712 INFO L129 PetriNetUnfolder]: 167/936 cut-off events. [2021-12-22 13:49:15,712 INFO L130 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2021-12-22 13:49:15,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1525 conditions, 936 events. 167/936 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5964 event pairs, 14 based on Foata normal form. 4/866 useless extension candidates. Maximal degree in co-relation 1516. Up to 86 conditions per place. [2021-12-22 13:49:15,717 INFO L132 encePairwiseOnDemand]: 101/133 looper letters, 88 selfloop transitions, 39 changer transitions 34/215 dead transitions. [2021-12-22 13:49:15,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 215 transitions, 886 flow [2021-12-22 13:49:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-22 13:49:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-22 13:49:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2702 transitions. [2021-12-22 13:49:15,725 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4724602203182375 [2021-12-22 13:49:15,725 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2702 transitions. [2021-12-22 13:49:15,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2702 transitions. [2021-12-22 13:49:15,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:15,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2702 transitions. [2021-12-22 13:49:15,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 62.83720930232558) internal successors, (2702), 43 states have internal predecessors, (2702), 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) [2021-12-22 13:49:15,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 133.0) internal successors, (5852), 44 states have internal predecessors, (5852), 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) [2021-12-22 13:49:15,743 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 133.0) internal successors, (5852), 44 states have internal predecessors, (5852), 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) [2021-12-22 13:49:15,743 INFO L186 Difference]: Start difference. First operand has 126 places, 116 transitions, 286 flow. Second operand 43 states and 2702 transitions. [2021-12-22 13:49:15,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 215 transitions, 886 flow [2021-12-22 13:49:15,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 215 transitions, 872 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-12-22 13:49:15,748 INFO L242 Difference]: Finished difference. Result has 183 places, 136 transitions, 505 flow [2021-12-22 13:49:15,749 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=505, PETRI_PLACES=183, PETRI_TRANSITIONS=136} [2021-12-22 13:49:15,749 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 65 predicate places. [2021-12-22 13:49:15,750 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 136 transitions, 505 flow [2021-12-22 13:49:15,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 61.80392156862745) internal successors, (3152), 51 states have internal predecessors, (3152), 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) [2021-12-22 13:49:15,751 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:15,751 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:15,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 13:49:15,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 13:49:15,965 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash 400817075, now seen corresponding path program 2 times [2021-12-22 13:49:15,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:15,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976227872] [2021-12-22 13:49:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:15,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:49:16,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:16,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976227872] [2021-12-22 13:49:16,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976227872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:16,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603135177] [2021-12-22 13:49:16,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:49:16,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:16,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:16,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:16,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:49:16,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:49:16,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:49:16,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:49:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:49:16,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:49:16,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603135177] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:16,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:16,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 9 [2021-12-22 13:49:16,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568443939] [2021-12-22 13:49:16,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:16,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:49:16,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:16,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:49:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:49:16,831 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 133 [2021-12-22 13:49:16,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 136 transitions, 505 flow. Second operand has 9 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 states have internal predecessors, (1040), 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) [2021-12-22 13:49:16,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:16,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 133 [2021-12-22 13:49:16,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:17,022 INFO L129 PetriNetUnfolder]: 153/1198 cut-off events. [2021-12-22 13:49:17,022 INFO L130 PetriNetUnfolder]: For 1072/1080 co-relation queries the response was YES. [2021-12-22 13:49:17,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2176 conditions, 1198 events. 153/1198 cut-off events. For 1072/1080 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 8170 event pairs, 20 based on Foata normal form. 10/1108 useless extension candidates. Maximal degree in co-relation 2147. Up to 122 conditions per place. [2021-12-22 13:49:17,030 INFO L132 encePairwiseOnDemand]: 127/133 looper letters, 29 selfloop transitions, 30 changer transitions 0/170 dead transitions. [2021-12-22 13:49:17,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 841 flow [2021-12-22 13:49:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:49:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:49:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2021-12-22 13:49:17,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8872180451127819 [2021-12-22 13:49:17,033 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2021-12-22 13:49:17,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2021-12-22 13:49:17,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:17,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2021-12-22 13:49:17,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 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) [2021-12-22 13:49:17,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 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) [2021-12-22 13:49:17,037 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 133.0) internal successors, (931), 7 states have internal predecessors, (931), 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) [2021-12-22 13:49:17,037 INFO L186 Difference]: Start difference. First operand has 183 places, 136 transitions, 505 flow. Second operand 6 states and 708 transitions. [2021-12-22 13:49:17,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 841 flow [2021-12-22 13:49:17,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 170 transitions, 735 flow, removed 31 selfloop flow, removed 26 redundant places. [2021-12-22 13:49:17,044 INFO L242 Difference]: Finished difference. Result has 156 places, 161 transitions, 724 flow [2021-12-22 13:49:17,045 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=156, PETRI_TRANSITIONS=161} [2021-12-22 13:49:17,045 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 38 predicate places. [2021-12-22 13:49:17,045 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 161 transitions, 724 flow [2021-12-22 13:49:17,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 states have internal predecessors, (1040), 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) [2021-12-22 13:49:17,046 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:17,046 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:17,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 13:49:17,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-22 13:49:17,268 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1811797277, now seen corresponding path program 3 times [2021-12-22 13:49:17,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:17,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034189878] [2021-12-22 13:49:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:17,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 13:49:17,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:17,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034189878] [2021-12-22 13:49:17,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034189878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:49:17,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:49:17,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:49:17,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725507635] [2021-12-22 13:49:17,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:49:17,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:49:17,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:17,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:49:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:49:17,371 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 133 [2021-12-22 13:49:17,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 161 transitions, 724 flow. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 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) [2021-12-22 13:49:17,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:17,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 133 [2021-12-22 13:49:17,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:17,625 INFO L129 PetriNetUnfolder]: 213/1816 cut-off events. [2021-12-22 13:49:17,626 INFO L130 PetriNetUnfolder]: For 1476/1476 co-relation queries the response was YES. [2021-12-22 13:49:17,630 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3202 conditions, 1816 events. 213/1816 cut-off events. For 1476/1476 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 15080 event pairs, 43 based on Foata normal form. 69/1719 useless extension candidates. Maximal degree in co-relation 3178. Up to 244 conditions per place. [2021-12-22 13:49:17,634 INFO L132 encePairwiseOnDemand]: 129/133 looper letters, 67 selfloop transitions, 4 changer transitions 1/183 dead transitions. [2021-12-22 13:49:17,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 183 transitions, 1049 flow [2021-12-22 13:49:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:49:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-22 13:49:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2021-12-22 13:49:17,637 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8909774436090225 [2021-12-22 13:49:17,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2021-12-22 13:49:17,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2021-12-22 13:49:17,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:17,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2021-12-22 13:49:17,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 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) [2021-12-22 13:49:17,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 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) [2021-12-22 13:49:17,640 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 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) [2021-12-22 13:49:17,640 INFO L186 Difference]: Start difference. First operand has 156 places, 161 transitions, 724 flow. Second operand 4 states and 474 transitions. [2021-12-22 13:49:17,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 183 transitions, 1049 flow [2021-12-22 13:49:17,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 1003 flow, removed 22 selfloop flow, removed 1 redundant places. [2021-12-22 13:49:17,646 INFO L242 Difference]: Finished difference. Result has 160 places, 159 transitions, 685 flow [2021-12-22 13:49:17,647 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=685, PETRI_PLACES=160, PETRI_TRANSITIONS=159} [2021-12-22 13:49:17,647 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 42 predicate places. [2021-12-22 13:49:17,648 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 159 transitions, 685 flow [2021-12-22 13:49:17,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 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) [2021-12-22 13:49:17,648 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:17,648 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:17,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:49:17,649 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash -193834779, now seen corresponding path program 1 times [2021-12-22 13:49:17,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:17,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80748784] [2021-12-22 13:49:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:17,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:18,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:18,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80748784] [2021-12-22 13:49:18,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80748784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:18,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814624109] [2021-12-22 13:49:18,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:18,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:18,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:18,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:49:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-22 13:49:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:20,443 INFO L353 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2021-12-22 13:49:20,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 22 [2021-12-22 13:49:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:20,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:21,064 INFO L353 Elim1Store]: treesize reduction 59, result has 41.0 percent of original size [2021-12-22 13:49:21,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 66 [2021-12-22 13:49:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:24,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814624109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:24,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:24,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 23] total 61 [2021-12-22 13:49:24,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228171716] [2021-12-22 13:49:24,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:24,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-22 13:49:24,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-22 13:49:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=3186, Unknown=0, NotChecked=0, Total=3660 [2021-12-22 13:49:24,072 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 133 [2021-12-22 13:49:24,075 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 159 transitions, 685 flow. Second operand has 61 states, 61 states have (on average 67.75409836065573) internal successors, (4133), 61 states have internal predecessors, (4133), 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) [2021-12-22 13:49:24,075 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:24,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 133 [2021-12-22 13:49:24,075 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:30,035 INFO L129 PetriNetUnfolder]: 1759/7006 cut-off events. [2021-12-22 13:49:30,035 INFO L130 PetriNetUnfolder]: For 7009/7015 co-relation queries the response was YES. [2021-12-22 13:49:30,062 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14570 conditions, 7006 events. 1759/7006 cut-off events. For 7009/7015 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 71937 event pairs, 399 based on Foata normal form. 10/6342 useless extension candidates. Maximal degree in co-relation 14543. Up to 1909 conditions per place. [2021-12-22 13:49:30,078 INFO L132 encePairwiseOnDemand]: 95/133 looper letters, 148 selfloop transitions, 128 changer transitions 160/493 dead transitions. [2021-12-22 13:49:30,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 493 transitions, 3064 flow [2021-12-22 13:49:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-22 13:49:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-22 13:49:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5559 transitions. [2021-12-22 13:49:30,090 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5224624060150376 [2021-12-22 13:49:30,091 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5559 transitions. [2021-12-22 13:49:30,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5559 transitions. [2021-12-22 13:49:30,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:30,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5559 transitions. [2021-12-22 13:49:30,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 69.4875) internal successors, (5559), 80 states have internal predecessors, (5559), 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) [2021-12-22 13:49:30,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 133.0) internal successors, (10773), 81 states have internal predecessors, (10773), 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) [2021-12-22 13:49:30,125 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 133.0) internal successors, (10773), 81 states have internal predecessors, (10773), 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) [2021-12-22 13:49:30,125 INFO L186 Difference]: Start difference. First operand has 160 places, 159 transitions, 685 flow. Second operand 80 states and 5559 transitions. [2021-12-22 13:49:30,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 493 transitions, 3064 flow [2021-12-22 13:49:30,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 493 transitions, 3037 flow, removed 13 selfloop flow, removed 1 redundant places. [2021-12-22 13:49:30,153 INFO L242 Difference]: Finished difference. Result has 278 places, 256 transitions, 1908 flow [2021-12-22 13:49:30,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=1908, PETRI_PLACES=278, PETRI_TRANSITIONS=256} [2021-12-22 13:49:30,155 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 160 predicate places. [2021-12-22 13:49:30,155 INFO L470 AbstractCegarLoop]: Abstraction has has 278 places, 256 transitions, 1908 flow [2021-12-22 13:49:30,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 67.75409836065573) internal successors, (4133), 61 states have internal predecessors, (4133), 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) [2021-12-22 13:49:30,157 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:30,157 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:30,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:49:30,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:30,370 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:30,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1730009969, now seen corresponding path program 2 times [2021-12-22 13:49:30,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:30,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052543263] [2021-12-22 13:49:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:30,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:49:30,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:30,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052543263] [2021-12-22 13:49:30,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052543263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:30,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140970099] [2021-12-22 13:49:30,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:49:30,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:30,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:30,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:30,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:49:30,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:49:30,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:49:30,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-22 13:49:30,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:30,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:49:31,167 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 13:49:31,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 13:49:31,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 13:49:31,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:49:31,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:49:32,219 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-22 13:49:32,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 14 [2021-12-22 13:49:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:32,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:33,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:49:33,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 125 [2021-12-22 13:49:33,963 INFO L353 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2021-12-22 13:49:33,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 384 treesize of output 371 [2021-12-22 13:49:33,994 INFO L353 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2021-12-22 13:49:33,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 293 [2021-12-22 13:49:34,021 INFO L353 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2021-12-22 13:49:34,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 255 treesize of output 254 [2021-12-22 13:49:37,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 13:49:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:37,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140970099] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:49:37,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:49:37,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 30, 28] total 58 [2021-12-22 13:49:37,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25138] [2021-12-22 13:49:37,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:49:37,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-22 13:49:37,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:49:37,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-22 13:49:37,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=2492, Unknown=70, NotChecked=0, Total=3306 [2021-12-22 13:49:37,265 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 133 [2021-12-22 13:49:37,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 256 transitions, 1908 flow. Second operand has 58 states, 58 states have (on average 61.793103448275865) internal successors, (3584), 58 states have internal predecessors, (3584), 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) [2021-12-22 13:49:37,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:49:37,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 133 [2021-12-22 13:49:37,268 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:49:42,907 INFO L129 PetriNetUnfolder]: 1717/9759 cut-off events. [2021-12-22 13:49:42,908 INFO L130 PetriNetUnfolder]: For 94789/95089 co-relation queries the response was YES. [2021-12-22 13:49:42,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40073 conditions, 9759 events. 1717/9759 cut-off events. For 94789/95089 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 112745 event pairs, 207 based on Foata normal form. 166/9370 useless extension candidates. Maximal degree in co-relation 40006. Up to 1762 conditions per place. [2021-12-22 13:49:43,086 INFO L132 encePairwiseOnDemand]: 101/133 looper letters, 214 selfloop transitions, 189 changer transitions 88/552 dead transitions. [2021-12-22 13:49:43,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 552 transitions, 6590 flow [2021-12-22 13:49:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-22 13:49:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-12-22 13:49:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4854 transitions. [2021-12-22 13:49:43,093 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47397715066887997 [2021-12-22 13:49:43,093 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4854 transitions. [2021-12-22 13:49:43,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4854 transitions. [2021-12-22 13:49:43,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:49:43,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4854 transitions. [2021-12-22 13:49:43,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 63.03896103896104) internal successors, (4854), 77 states have internal predecessors, (4854), 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) [2021-12-22 13:49:43,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 133.0) internal successors, (10374), 78 states have internal predecessors, (10374), 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) [2021-12-22 13:49:43,118 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 133.0) internal successors, (10374), 78 states have internal predecessors, (10374), 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) [2021-12-22 13:49:43,118 INFO L186 Difference]: Start difference. First operand has 278 places, 256 transitions, 1908 flow. Second operand 77 states and 4854 transitions. [2021-12-22 13:49:43,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 552 transitions, 6590 flow [2021-12-22 13:49:43,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 552 transitions, 5510 flow, removed 514 selfloop flow, removed 38 redundant places. [2021-12-22 13:49:43,279 INFO L242 Difference]: Finished difference. Result has 333 places, 357 transitions, 3406 flow [2021-12-22 13:49:43,280 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=3406, PETRI_PLACES=333, PETRI_TRANSITIONS=357} [2021-12-22 13:49:43,280 INFO L334 CegarLoopForPetriNet]: 118 programPoint places, 215 predicate places. [2021-12-22 13:49:43,281 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 357 transitions, 3406 flow [2021-12-22 13:49:43,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 61.793103448275865) internal successors, (3584), 58 states have internal predecessors, (3584), 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) [2021-12-22 13:49:43,282 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:49:43,282 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:49:43,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:49:43,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:43,495 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:49:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:49:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash 221263351, now seen corresponding path program 3 times [2021-12-22 13:49:43,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:49:43,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414739738] [2021-12-22 13:49:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:49:43,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:49:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:49:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:44,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:49:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414739738] [2021-12-22 13:49:44,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414739738] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:49:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564239576] [2021-12-22 13:49:44,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:49:44,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:49:44,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:49:44,912 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:49:44,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:49:45,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-22 13:49:45,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:49:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-22 13:49:45,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:49:45,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 13:49:45,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-22 13:49:46,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:49:46,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:49:47,068 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-12-22 13:49:47,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 17 [2021-12-22 13:49:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:49:47,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:49:52,578 INFO L353 Elim1Store]: treesize reduction 28, result has 54.8 percent of original size [2021-12-22 13:49:52,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 226 treesize of output 145 [2021-12-22 13:49:52,661 INFO L353 Elim1Store]: treesize reduction 62, result has 62.4 percent of original size [2021-12-22 13:49:52,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 821 treesize of output 815 [2021-12-22 13:49:52,705 INFO L353 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2021-12-22 13:49:52,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 700 treesize of output 676 [2021-12-22 13:49:52,748 INFO L353 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2021-12-22 13:49:52,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 624 treesize of output 524