./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-prod-cons.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 f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:08:42,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:08:42,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:08:43,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:08:43,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:08:43,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:08:43,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:08:43,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:08:43,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:08:43,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:08:43,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:08:43,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:08:43,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:08:43,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:08:43,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:08:43,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:08:43,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:08:43,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:08:43,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:08:43,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:08:43,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:08:43,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:08:43,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:08:43,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:08:43,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:08:43,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:08:43,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:08:43,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:08:43,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:08:43,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:08:43,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:08:43,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:08:43,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:08:43,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:08:43,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:08:43,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:08:43,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:08:43,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:08:43,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:08:43,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:08:43,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:08:43,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:08:43,068 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:08:43,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:08:43,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:08:43,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:08:43,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:08:43,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:08:43,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:08:43,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:08:43,071 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:08:43,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:08:43,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:08:43,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:08:43,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:08:43,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:08:43,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:08:43,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:08:43,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:08:43,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:08:43,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:08:43,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:08:43,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:08:43,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:08:43,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:08:43,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:08:43,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:08:43,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:08:43,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:08:43,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:08:43,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:08:43,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:08:43,076 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:08:43,076 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:08:43,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:08:43,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:08:43,077 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9b434f3343269d91303305376bff127738dc22172486554888e346753333fd7 [2021-12-17 23:08:43,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:08:43,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:08:43,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:08:43,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:08:43,275 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:08:43,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2021-12-17 23:08:43,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a44bb1413/9c5a4eeee8614239a2dad0052f735bea/FLAG0b8474393 [2021-12-17 23:08:43,675 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:08:43,676 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2021-12-17 23:08:43,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a44bb1413/9c5a4eeee8614239a2dad0052f735bea/FLAG0b8474393 [2021-12-17 23:08:43,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a44bb1413/9c5a4eeee8614239a2dad0052f735bea [2021-12-17 23:08:43,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:08:43,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:08:43,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:08:43,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:08:43,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:08:43,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e6338f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43, skipping insertion in model container [2021-12-17 23:08:43,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:08:43,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:08:43,841 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-prod-cons.wvr.c[3056,3069] [2021-12-17 23:08:43,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:08:43,850 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:08:43,863 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-prod-cons.wvr.c[3056,3069] [2021-12-17 23:08:43,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:08:43,875 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:08:43,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43 WrapperNode [2021-12-17 23:08:43,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:08:43,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:08:43,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:08:43,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:08:43,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,910 INFO L137 Inliner]: procedures = 25, calls = 50, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 166 [2021-12-17 23:08:43,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:08:43,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:08:43,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:08:43,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:08:43,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:08:43,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:08:43,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:08:43,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:08:43,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (1/1) ... [2021-12-17 23:08:43,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:08:43,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:08:43,958 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) [2021-12-17 23:08:43,959 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 [2021-12-17 23:08:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:08:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:08:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:08:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:08:43,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:08:43,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:08:43,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:08:43,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:08:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-17 23:08:43,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-17 23:08:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:08:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 23:08:43,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 23:08:43,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:08:43,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:08:43,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:08:43,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:08:44,000 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 23:08:44,069 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:08:44,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:08:44,280 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:08:44,329 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:08:44,330 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 23:08:44,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:08:44 BoogieIcfgContainer [2021-12-17 23:08:44,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:08:44,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:08:44,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:08:44,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:08:44,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:08:43" (1/3) ... [2021-12-17 23:08:44,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a9d3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:08:44, skipping insertion in model container [2021-12-17 23:08:44,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:08:43" (2/3) ... [2021-12-17 23:08:44,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a9d3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:08:44, skipping insertion in model container [2021-12-17 23:08:44,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:08:44" (3/3) ... [2021-12-17 23:08:44,339 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2021-12-17 23:08:44,342 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:08:44,343 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:08:44,343 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:08:44,343 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:08:44,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,368 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,369 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,370 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,371 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,371 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,371 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,372 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,384 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,385 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,385 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,385 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,385 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,386 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,387 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,388 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,388 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,388 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,388 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,388 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,388 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,389 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,390 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,390 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,390 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,390 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,392 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,393 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,394 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,397 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,397 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,397 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~w~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,397 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,397 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,398 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,398 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,398 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,399 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,401 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~temp~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,401 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,401 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,402 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,402 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,403 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,403 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:08:44,405 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-17 23:08:44,460 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:08:44,465 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 [2021-12-17 23:08:44,465 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-17 23:08:44,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 155 places, 156 transitions, 336 flow [2021-12-17 23:08:44,518 INFO L129 PetriNetUnfolder]: 11/153 cut-off events. [2021-12-17 23:08:44,518 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:08:44,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 11/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 122. Up to 3 conditions per place. [2021-12-17 23:08:44,522 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 156 transitions, 336 flow [2021-12-17 23:08:44,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 142 transitions, 302 flow [2021-12-17 23:08:44,552 INFO L129 PetriNetUnfolder]: 11/141 cut-off events. [2021-12-17 23:08:44,552 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:08:44,553 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:44,553 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, 1, 1, 1] [2021-12-17 23:08:44,554 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1502345378, now seen corresponding path program 1 times [2021-12-17 23:08:44,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:44,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116092160] [2021-12-17 23:08:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:44,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:44,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:44,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116092160] [2021-12-17 23:08:44,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116092160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:44,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:44,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 23:08:44,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100480019] [2021-12-17 23:08:44,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:44,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 23:08:44,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 23:08:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 23:08:44,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 156 [2021-12-17 23:08:44,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 142 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 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) [2021-12-17 23:08:44,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:44,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 156 [2021-12-17 23:08:44,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:44,820 INFO L129 PetriNetUnfolder]: 24/206 cut-off events. [2021-12-17 23:08:44,820 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-12-17 23:08:44,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 206 events. 24/206 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 370 event pairs, 7 based on Foata normal form. 22/206 useless extension candidates. Maximal degree in co-relation 154. Up to 32 conditions per place. [2021-12-17 23:08:44,823 INFO L132 encePairwiseOnDemand]: 149/156 looper letters, 8 selfloop transitions, 0 changer transitions 4/135 dead transitions. [2021-12-17 23:08:44,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 135 transitions, 304 flow [2021-12-17 23:08:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 23:08:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 23:08:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 295 transitions. [2021-12-17 23:08:44,834 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9455128205128205 [2021-12-17 23:08:44,834 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 295 transitions. [2021-12-17 23:08:44,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 295 transitions. [2021-12-17 23:08:44,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:44,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 295 transitions. [2021-12-17 23:08:44,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 147.5) internal successors, (295), 2 states have internal predecessors, (295), 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) [2021-12-17 23:08:44,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2021-12-17 23:08:44,843 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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) [2021-12-17 23:08:44,845 INFO L186 Difference]: Start difference. First operand has 141 places, 142 transitions, 302 flow. Second operand 2 states and 295 transitions. [2021-12-17 23:08:44,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 135 transitions, 304 flow [2021-12-17 23:08:44,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 135 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-17 23:08:44,850 INFO L242 Difference]: Finished difference. Result has 136 places, 131 transitions, 268 flow [2021-12-17 23:08:44,851 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=268, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2021-12-17 23:08:44,854 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, -5 predicate places. [2021-12-17 23:08:44,854 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 268 flow [2021-12-17 23:08:44,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 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) [2021-12-17 23:08:44,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:44,855 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, 1, 1, 1] [2021-12-17 23:08:44,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:08:44,855 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1179471207, now seen corresponding path program 1 times [2021-12-17 23:08:44,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:44,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53683428] [2021-12-17 23:08:44,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:44,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:45,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:45,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53683428] [2021-12-17 23:08:45,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53683428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:45,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:45,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:08:45,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703935331] [2021-12-17 23:08:45,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:45,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:08:45,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:08:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:08:45,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 156 [2021-12-17 23:08:45,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2021-12-17 23:08:45,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:45,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 156 [2021-12-17 23:08:45,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:45,164 INFO L129 PetriNetUnfolder]: 108/360 cut-off events. [2021-12-17 23:08:45,166 INFO L130 PetriNetUnfolder]: For 26/27 co-relation queries the response was YES. [2021-12-17 23:08:45,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 360 events. 108/360 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1321 event pairs, 16 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 547. Up to 61 conditions per place. [2021-12-17 23:08:45,170 INFO L132 encePairwiseOnDemand]: 151/156 looper letters, 30 selfloop transitions, 5 changer transitions 0/149 dead transitions. [2021-12-17 23:08:45,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 149 transitions, 378 flow [2021-12-17 23:08:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:08:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 23:08:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 692 transitions. [2021-12-17 23:08:45,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8871794871794871 [2021-12-17 23:08:45,180 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 692 transitions. [2021-12-17 23:08:45,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 692 transitions. [2021-12-17 23:08:45,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:45,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 692 transitions. [2021-12-17 23:08:45,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 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) [2021-12-17 23:08:45,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 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) [2021-12-17 23:08:45,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 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) [2021-12-17 23:08:45,189 INFO L186 Difference]: Start difference. First operand has 136 places, 131 transitions, 268 flow. Second operand 5 states and 692 transitions. [2021-12-17 23:08:45,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 149 transitions, 378 flow [2021-12-17 23:08:45,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 149 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:08:45,195 INFO L242 Difference]: Finished difference. Result has 139 places, 134 transitions, 299 flow [2021-12-17 23:08:45,196 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=139, PETRI_TRANSITIONS=134} [2021-12-17 23:08:45,196 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, -2 predicate places. [2021-12-17 23:08:45,197 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 134 transitions, 299 flow [2021-12-17 23:08:45,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.0) internal successors, (536), 4 states have internal predecessors, (536), 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) [2021-12-17 23:08:45,197 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:45,197 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, 1, 1, 1] [2021-12-17 23:08:45,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:08:45,198 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:45,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1830553999, now seen corresponding path program 2 times [2021-12-17 23:08:45,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:45,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674919154] [2021-12-17 23:08:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:45,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:45,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:45,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674919154] [2021-12-17 23:08:45,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674919154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:45,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:45,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 23:08:45,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586521922] [2021-12-17 23:08:45,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:45,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 23:08:45,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:45,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 23:08:45,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 23:08:45,490 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 156 [2021-12-17 23:08:45,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 299 flow. Second operand has 9 states, 9 states have (on average 110.44444444444444) internal successors, (994), 9 states have internal predecessors, (994), 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) [2021-12-17 23:08:45,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:45,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 156 [2021-12-17 23:08:45,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:45,731 INFO L129 PetriNetUnfolder]: 223/618 cut-off events. [2021-12-17 23:08:45,731 INFO L130 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2021-12-17 23:08:45,735 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 618 events. 223/618 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3311 event pairs, 20 based on Foata normal form. 10/607 useless extension candidates. Maximal degree in co-relation 1228. Up to 144 conditions per place. [2021-12-17 23:08:45,738 INFO L132 encePairwiseOnDemand]: 145/156 looper letters, 52 selfloop transitions, 11 changer transitions 0/157 dead transitions. [2021-12-17 23:08:45,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 157 transitions, 485 flow [2021-12-17 23:08:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 23:08:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-12-17 23:08:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1132 transitions. [2021-12-17 23:08:45,742 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7256410256410256 [2021-12-17 23:08:45,742 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1132 transitions. [2021-12-17 23:08:45,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1132 transitions. [2021-12-17 23:08:45,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:45,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1132 transitions. [2021-12-17 23:08:45,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 113.2) internal successors, (1132), 10 states have internal predecessors, (1132), 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) [2021-12-17 23:08:45,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 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) [2021-12-17 23:08:45,748 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 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) [2021-12-17 23:08:45,748 INFO L186 Difference]: Start difference. First operand has 139 places, 134 transitions, 299 flow. Second operand 10 states and 1132 transitions. [2021-12-17 23:08:45,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 157 transitions, 485 flow [2021-12-17 23:08:45,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 157 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 23:08:45,755 INFO L242 Difference]: Finished difference. Result has 149 places, 136 transitions, 339 flow [2021-12-17 23:08:45,755 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=339, PETRI_PLACES=149, PETRI_TRANSITIONS=136} [2021-12-17 23:08:45,756 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 8 predicate places. [2021-12-17 23:08:45,757 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 136 transitions, 339 flow [2021-12-17 23:08:45,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 110.44444444444444) internal successors, (994), 9 states have internal predecessors, (994), 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) [2021-12-17 23:08:45,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:45,758 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:08:45,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 23:08:45,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash -334250164, now seen corresponding path program 1 times [2021-12-17 23:08:45,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718411280] [2021-12-17 23:08:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:45,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:45,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:45,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718411280] [2021-12-17 23:08:45,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718411280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:45,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:45,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 23:08:45,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785593855] [2021-12-17 23:08:45,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:45,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 23:08:45,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 23:08:45,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:08:45,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 156 [2021-12-17 23:08:45,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 136 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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) [2021-12-17 23:08:45,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:45,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 156 [2021-12-17 23:08:45,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:45,883 INFO L129 PetriNetUnfolder]: 33/243 cut-off events. [2021-12-17 23:08:45,884 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2021-12-17 23:08:45,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 243 events. 33/243 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 571 event pairs, 5 based on Foata normal form. 4/229 useless extension candidates. Maximal degree in co-relation 368. Up to 41 conditions per place. [2021-12-17 23:08:45,885 INFO L132 encePairwiseOnDemand]: 153/156 looper letters, 13 selfloop transitions, 2 changer transitions 1/140 dead transitions. [2021-12-17 23:08:45,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 140 transitions, 382 flow [2021-12-17 23:08:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 23:08:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 23:08:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2021-12-17 23:08:45,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9081196581196581 [2021-12-17 23:08:45,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2021-12-17 23:08:45,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2021-12-17 23:08:45,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:45,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2021-12-17 23:08:45,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2021-12-17 23:08:45,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 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) [2021-12-17 23:08:45,890 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 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) [2021-12-17 23:08:45,890 INFO L186 Difference]: Start difference. First operand has 149 places, 136 transitions, 339 flow. Second operand 3 states and 425 transitions. [2021-12-17 23:08:45,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 140 transitions, 382 flow [2021-12-17 23:08:45,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 140 transitions, 365 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-12-17 23:08:45,893 INFO L242 Difference]: Finished difference. Result has 145 places, 137 transitions, 334 flow [2021-12-17 23:08:45,893 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2021-12-17 23:08:45,894 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 4 predicate places. [2021-12-17 23:08:45,894 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 334 flow [2021-12-17 23:08:45,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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) [2021-12-17 23:08:45,895 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:45,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:08:45,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:08:45,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1349938213, now seen corresponding path program 1 times [2021-12-17 23:08:45,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:45,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936150689] [2021-12-17 23:08:45,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:45,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:46,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:46,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936150689] [2021-12-17 23:08:46,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936150689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:46,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:46,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:08:46,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212197842] [2021-12-17 23:08:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:46,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:08:46,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:08:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:08:46,003 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 156 [2021-12-17 23:08:46,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 334 flow. Second operand has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-12-17 23:08:46,004 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:46,004 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 156 [2021-12-17 23:08:46,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:46,082 INFO L129 PetriNetUnfolder]: 34/302 cut-off events. [2021-12-17 23:08:46,083 INFO L130 PetriNetUnfolder]: For 71/79 co-relation queries the response was YES. [2021-12-17 23:08:46,084 INFO L84 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 302 events. 34/302 cut-off events. For 71/79 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 801 event pairs, 9 based on Foata normal form. 3/282 useless extension candidates. Maximal degree in co-relation 476. Up to 51 conditions per place. [2021-12-17 23:08:46,086 INFO L132 encePairwiseOnDemand]: 148/156 looper letters, 21 selfloop transitions, 6 changer transitions 5/146 dead transitions. [2021-12-17 23:08:46,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 146 transitions, 420 flow [2021-12-17 23:08:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:08:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:08:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 914 transitions. [2021-12-17 23:08:46,088 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.836996336996337 [2021-12-17 23:08:46,088 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 914 transitions. [2021-12-17 23:08:46,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 914 transitions. [2021-12-17 23:08:46,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:46,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 914 transitions. [2021-12-17 23:08:46,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.57142857142858) internal successors, (914), 7 states have internal predecessors, (914), 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) [2021-12-17 23:08:46,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 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) [2021-12-17 23:08:46,094 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 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) [2021-12-17 23:08:46,094 INFO L186 Difference]: Start difference. First operand has 145 places, 137 transitions, 334 flow. Second operand 7 states and 914 transitions. [2021-12-17 23:08:46,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 146 transitions, 420 flow [2021-12-17 23:08:46,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 146 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 23:08:46,098 INFO L242 Difference]: Finished difference. Result has 152 places, 138 transitions, 354 flow [2021-12-17 23:08:46,098 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=354, PETRI_PLACES=152, PETRI_TRANSITIONS=138} [2021-12-17 23:08:46,100 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 11 predicate places. [2021-12-17 23:08:46,100 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 138 transitions, 354 flow [2021-12-17 23:08:46,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 129.0) internal successors, (774), 6 states have internal predecessors, (774), 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) [2021-12-17 23:08:46,101 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:46,101 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:08:46,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:08:46,101 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:46,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:46,102 INFO L85 PathProgramCache]: Analyzing trace with hash 530472597, now seen corresponding path program 1 times [2021-12-17 23:08:46,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:46,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380018549] [2021-12-17 23:08:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:46,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:46,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:46,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380018549] [2021-12-17 23:08:46,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380018549] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:08:46,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411862177] [2021-12-17 23:08:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:46,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:08:46,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:08:46,731 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) [2021-12-17 23:08:46,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:08:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 23:08:46,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:08:47,700 INFO L388 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 [2021-12-17 23:08:48,259 INFO L388 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 [2021-12-17 23:08:48,362 INFO L388 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 [2021-12-17 23:08:48,600 INFO L388 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 [2021-12-17 23:08:48,895 INFO L388 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 [2021-12-17 23:08:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:49,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:08:50,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:08:50,565 INFO L388 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 68 treesize of output 56 [2021-12-17 23:08:50,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:08:50,579 INFO L388 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 2636 treesize of output 2524 [2021-12-17 23:08:50,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:08:50,599 INFO L388 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 1866 treesize of output 1786 [2021-12-17 23:08:50,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:08:50,629 INFO L388 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 2412 treesize of output 2236 [2021-12-17 23:08:50,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:08:50,647 INFO L388 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 2220 treesize of output 1852 [2021-12-17 23:08:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:59,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411862177] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:08:59,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:08:59,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 27] total 73 [2021-12-17 23:08:59,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664518410] [2021-12-17 23:08:59,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:08:59,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-17 23:08:59,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:59,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-17 23:08:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=4445, Unknown=81, NotChecked=0, Total=5256 [2021-12-17 23:08:59,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 156 [2021-12-17 23:08:59,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 138 transitions, 354 flow. Second operand has 73 states, 73 states have (on average 76.42465753424658) internal successors, (5579), 73 states have internal predecessors, (5579), 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) [2021-12-17 23:08:59,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:59,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 156 [2021-12-17 23:08:59,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:11,511 INFO L129 PetriNetUnfolder]: 11844/22911 cut-off events. [2021-12-17 23:09:11,512 INFO L130 PetriNetUnfolder]: For 14396/14396 co-relation queries the response was YES. [2021-12-17 23:09:11,560 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53105 conditions, 22911 events. 11844/22911 cut-off events. For 14396/14396 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 214585 event pairs, 657 based on Foata normal form. 84/21454 useless extension candidates. Maximal degree in co-relation 53093. Up to 2471 conditions per place. [2021-12-17 23:09:11,626 INFO L132 encePairwiseOnDemand]: 112/156 looper letters, 698 selfloop transitions, 231 changer transitions 505/1497 dead transitions. [2021-12-17 23:09:11,627 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 1497 transitions, 7189 flow [2021-12-17 23:09:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-12-17 23:09:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-12-17 23:09:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 12583 transitions. [2021-12-17 23:09:11,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5341738835116319 [2021-12-17 23:09:11,645 INFO L72 ComplementDD]: Start complementDD. Operand 151 states and 12583 transitions. [2021-12-17 23:09:11,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 12583 transitions. [2021-12-17 23:09:11,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:11,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 151 states and 12583 transitions. [2021-12-17 23:09:11,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 152 states, 151 states have (on average 83.33112582781457) internal successors, (12583), 151 states have internal predecessors, (12583), 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) [2021-12-17 23:09:11,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 152 states, 152 states have (on average 156.0) internal successors, (23712), 152 states have internal predecessors, (23712), 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) [2021-12-17 23:09:11,720 INFO L81 ComplementDD]: Finished complementDD. Result has 152 states, 152 states have (on average 156.0) internal successors, (23712), 152 states have internal predecessors, (23712), 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) [2021-12-17 23:09:11,720 INFO L186 Difference]: Start difference. First operand has 152 places, 138 transitions, 354 flow. Second operand 151 states and 12583 transitions. [2021-12-17 23:09:11,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 1497 transitions, 7189 flow [2021-12-17 23:09:11,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1497 transitions, 7113 flow, removed 33 selfloop flow, removed 5 redundant places. [2021-12-17 23:09:11,773 INFO L242 Difference]: Finished difference. Result has 389 places, 372 transitions, 2490 flow [2021-12-17 23:09:11,773 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=151, PETRI_FLOW=2490, PETRI_PLACES=389, PETRI_TRANSITIONS=372} [2021-12-17 23:09:11,776 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 248 predicate places. [2021-12-17 23:09:11,776 INFO L470 AbstractCegarLoop]: Abstraction has has 389 places, 372 transitions, 2490 flow [2021-12-17 23:09:11,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 76.42465753424658) internal successors, (5579), 73 states have internal predecessors, (5579), 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) [2021-12-17 23:09:11,778 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:11,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:11,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:09:11,987 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 [2021-12-17 23:09:11,987 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1891385333, now seen corresponding path program 2 times [2021-12-17 23:09:11,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:11,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226653522] [2021-12-17 23:09:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:11,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:12,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:12,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226653522] [2021-12-17 23:09:12,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226653522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:09:12,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277761738] [2021-12-17 23:09:12,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:09:12,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:12,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:12,573 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) [2021-12-17 23:09:12,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:09:12,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:09:12,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:09:12,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 23:09:12,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:09:12,695 INFO L388 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 [2021-12-17 23:09:12,724 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-17 23:09:12,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 14 [2021-12-17 23:09:12,759 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-12-17 23:09:12,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2021-12-17 23:09:13,297 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-12-17 23:09:13,297 INFO L388 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 21 treesize of output 25 [2021-12-17 23:09:13,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2021-12-17 23:09:14,004 INFO L388 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 [2021-12-17 23:09:14,119 INFO L388 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 [2021-12-17 23:09:14,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:09:14,709 INFO L388 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 19 treesize of output 7 [2021-12-17 23:09:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:14,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:09:16,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:09:16,562 INFO L388 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 65 treesize of output 53 [2021-12-17 23:09:16,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:09:16,571 INFO L388 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 824 treesize of output 792 [2021-12-17 23:09:16,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:09:16,588 INFO L388 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 458 treesize of output 438 [2021-12-17 23:09:16,597 INFO L388 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 614 treesize of output 518 [2021-12-17 23:09:16,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:09:16,613 INFO L388 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 644 treesize of output 588 [2021-12-17 23:09:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:21,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277761738] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:09:21,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:09:21,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 31] total 78 [2021-12-17 23:09:21,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966099998] [2021-12-17 23:09:21,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:09:21,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-17 23:09:21,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:21,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-17 23:09:21,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=5483, Unknown=24, NotChecked=0, Total=6006 [2021-12-17 23:09:21,091 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 156 [2021-12-17 23:09:21,094 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 372 transitions, 2490 flow. Second operand has 78 states, 78 states have (on average 71.37179487179488) internal successors, (5567), 78 states have internal predecessors, (5567), 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) [2021-12-17 23:09:21,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:21,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 156 [2021-12-17 23:09:21,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:42,472 INFO L129 PetriNetUnfolder]: 26643/48493 cut-off events. [2021-12-17 23:09:42,472 INFO L130 PetriNetUnfolder]: For 1600268/1602955 co-relation queries the response was YES. [2021-12-17 23:09:43,679 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356271 conditions, 48493 events. 26643/48493 cut-off events. For 1600268/1602955 co-relation queries the response was YES. Maximal size of possible extension queue 2116. Compared 475228 event pairs, 4178 based on Foata normal form. 128/46281 useless extension candidates. Maximal degree in co-relation 356168. Up to 11778 conditions per place. [2021-12-17 23:09:43,838 INFO L132 encePairwiseOnDemand]: 114/156 looper letters, 758 selfloop transitions, 237 changer transitions 469/1522 dead transitions. [2021-12-17 23:09:43,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1522 transitions, 18877 flow [2021-12-17 23:09:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-17 23:09:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-12-17 23:09:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 7582 transitions. [2021-12-17 23:09:43,861 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5010573618821041 [2021-12-17 23:09:43,861 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 7582 transitions. [2021-12-17 23:09:43,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 7582 transitions. [2021-12-17 23:09:43,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:43,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 7582 transitions. [2021-12-17 23:09:43,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 78.16494845360825) internal successors, (7582), 97 states have internal predecessors, (7582), 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) [2021-12-17 23:09:43,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 156.0) internal successors, (15288), 98 states have internal predecessors, (15288), 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) [2021-12-17 23:09:43,903 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 156.0) internal successors, (15288), 98 states have internal predecessors, (15288), 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) [2021-12-17 23:09:43,904 INFO L186 Difference]: Start difference. First operand has 389 places, 372 transitions, 2490 flow. Second operand 97 states and 7582 transitions. [2021-12-17 23:09:43,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1522 transitions, 18877 flow [2021-12-17 23:09:50,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1522 transitions, 16191 flow, removed 1324 selfloop flow, removed 50 redundant places. [2021-12-17 23:09:50,722 INFO L242 Difference]: Finished difference. Result has 440 places, 464 transitions, 4709 flow [2021-12-17 23:09:50,722 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=4709, PETRI_PLACES=440, PETRI_TRANSITIONS=464} [2021-12-17 23:09:50,723 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 299 predicate places. [2021-12-17 23:09:50,723 INFO L470 AbstractCegarLoop]: Abstraction has has 440 places, 464 transitions, 4709 flow [2021-12-17 23:09:50,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 71.37179487179488) internal successors, (5567), 78 states have internal predecessors, (5567), 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) [2021-12-17 23:09:50,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:50,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:50,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 23:09:50,925 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 [2021-12-17 23:09:50,925 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:50,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2122955277, now seen corresponding path program 3 times [2021-12-17 23:09:50,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:50,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452806242] [2021-12-17 23:09:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:50,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:51,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:51,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452806242] [2021-12-17 23:09:51,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452806242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:09:51,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907135903] [2021-12-17 23:09:51,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:09:51,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:51,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:51,699 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) [2021-12-17 23:09:51,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:09:51,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:09:51,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:09:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 23:09:51,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:09:52,443 INFO L388 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 [2021-12-17 23:09:52,894 INFO L388 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 [2021-12-17 23:09:53,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:09:53,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:09:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:09:53,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:09:53,447 INFO L388 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 [2021-12-17 23:09:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:53,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:09:53,723 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_184 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_184) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) c_~W~0)) is different from false [2021-12-17 23:09:53,743 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_184 (Array Int Int)) (v_ArrVal_183 (Array Int Int))) (<= (+ c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_183) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_184) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) c_~W~0)) is different from false [2021-12-17 23:09:54,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:09:54,835 INFO L388 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 62 treesize of output 50 [2021-12-17 23:09:54,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:09:54,854 INFO L388 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 362 treesize of output 354 [2021-12-17 23:09:54,860 INFO L388 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 314 treesize of output 266 [2021-12-17 23:09:54,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:09:54,870 INFO L388 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 290 treesize of output 288 [2021-12-17 23:09:54,875 INFO L388 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 254 treesize of output 230 [2021-12-17 23:09:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:56,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907135903] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:09:56,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:09:56,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 31] total 80 [2021-12-17 23:09:56,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327719781] [2021-12-17 23:09:56,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:09:56,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-17 23:09:56,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:56,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-17 23:09:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=5506, Unknown=23, NotChecked=306, Total=6320 [2021-12-17 23:09:56,436 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 156 [2021-12-17 23:09:56,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 464 transitions, 4709 flow. Second operand has 80 states, 80 states have (on average 74.275) internal successors, (5942), 80 states have internal predecessors, (5942), 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) [2021-12-17 23:09:56,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:56,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 156 [2021-12-17 23:09:56,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:10:01,155 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (<= c_~d~0 0))) (and (or (and (= (* 4 c_~back~0) (* 4 c_~front~0)) .cse0 (<= |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t2~0#1.base|) (<= |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t3~0#1.base|)) (<= 1 c_~back~0) (< c_~back~0 0)) .cse0 (forall ((v_ArrVal_184 (Array Int Int)) (v_ArrVal_183 (Array Int Int))) (<= (+ c_~d~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_183) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_184) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) c_~W~0)))) is different from false [2021-12-17 23:10:21,211 INFO L129 PetriNetUnfolder]: 34601/62995 cut-off events. [2021-12-17 23:10:21,212 INFO L130 PetriNetUnfolder]: For 1673789/1677054 co-relation queries the response was YES. [2021-12-17 23:10:22,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 462353 conditions, 62995 events. 34601/62995 cut-off events. For 1673789/1677054 co-relation queries the response was YES. Maximal size of possible extension queue 2606. Compared 625333 event pairs, 4320 based on Foata normal form. 191/62811 useless extension candidates. Maximal degree in co-relation 462231. Up to 21536 conditions per place. [2021-12-17 23:10:23,298 INFO L132 encePairwiseOnDemand]: 108/156 looper letters, 907 selfloop transitions, 1053 changer transitions 122/2143 dead transitions. [2021-12-17 23:10:23,298 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 2143 transitions, 31973 flow [2021-12-17 23:10:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-17 23:10:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-12-17 23:10:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 8751 transitions. [2021-12-17 23:10:23,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5146436132674664 [2021-12-17 23:10:23,307 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 8751 transitions. [2021-12-17 23:10:23,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 8751 transitions. [2021-12-17 23:10:23,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:10:23,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 8751 transitions. [2021-12-17 23:10:23,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 80.28440366972477) internal successors, (8751), 109 states have internal predecessors, (8751), 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) [2021-12-17 23:10:23,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 156.0) internal successors, (17160), 110 states have internal predecessors, (17160), 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) [2021-12-17 23:10:23,335 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 156.0) internal successors, (17160), 110 states have internal predecessors, (17160), 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) [2021-12-17 23:10:23,335 INFO L186 Difference]: Start difference. First operand has 440 places, 464 transitions, 4709 flow. Second operand 109 states and 8751 transitions. [2021-12-17 23:10:23,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 2143 transitions, 31973 flow [2021-12-17 23:10:41,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 2143 transitions, 26417 flow, removed 2375 selfloop flow, removed 68 redundant places. [2021-12-17 23:10:41,970 INFO L242 Difference]: Finished difference. Result has 498 places, 1492 transitions, 20187 flow [2021-12-17 23:10:41,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=3809, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=20187, PETRI_PLACES=498, PETRI_TRANSITIONS=1492} [2021-12-17 23:10:41,971 INFO L334 CegarLoopForPetriNet]: 141 programPoint places, 357 predicate places. [2021-12-17 23:10:41,971 INFO L470 AbstractCegarLoop]: Abstraction has has 498 places, 1492 transitions, 20187 flow [2021-12-17 23:10:41,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 74.275) internal successors, (5942), 80 states have internal predecessors, (5942), 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) [2021-12-17 23:10:41,973 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:10:41,973 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:10:42,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:10:42,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:10:42,192 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:10:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:10:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1696238531, now seen corresponding path program 4 times [2021-12-17 23:10:42,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:10:42,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061864367] [2021-12-17 23:10:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:10:42,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:10:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:10:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:10:42,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:10:42,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061864367] [2021-12-17 23:10:42,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061864367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:10:42,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092115347] [2021-12-17 23:10:42,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:10:42,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:10:42,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:10:42,755 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) [2021-12-17 23:10:42,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:10:42,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:10:42,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:10:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-17 23:10:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:10:43,386 INFO L388 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 [2021-12-17 23:10:43,807 INFO L388 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 [2021-12-17 23:10:44,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:10:44,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:10:44,190 INFO L388 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 [2021-12-17 23:10:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:10:44,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:10:44,511 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_220 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_220) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) c_~d~0) c_~W~0)) is different from false [2021-12-17 23:10:45,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:10:45,469 INFO L388 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 59 treesize of output 47 [2021-12-17 23:10:45,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:10:45,481 INFO L388 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 108 treesize of output 108 [2021-12-17 23:10:45,486 INFO L388 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 68 treesize of output 56 [2021-12-17 23:10:45,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:10:45,496 INFO L388 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 55 treesize of output 59 [2021-12-17 23:10:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:10:46,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092115347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:10:46,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:10:46,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29, 29] total 75 [2021-12-17 23:10:46,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017601641] [2021-12-17 23:10:46,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:10:46,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-17 23:10:46,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:10:46,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-17 23:10:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=4943, Unknown=20, NotChecked=144, Total=5550 [2021-12-17 23:10:46,426 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 156 [2021-12-17 23:10:46,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1492 transitions, 20187 flow. Second operand has 75 states, 75 states have (on average 76.37333333333333) internal successors, (5728), 75 states have internal predecessors, (5728), 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) [2021-12-17 23:10:46,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:10:46,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 156 [2021-12-17 23:10:46,429 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand