./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-cond-2.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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:50:43,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:50:43,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:50:43,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:50:43,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:50:43,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:50:43,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:50:43,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:50:43,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:50:43,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:50:43,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:50:43,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:50:43,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:50:43,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:50:43,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:50:43,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:50:43,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:50:43,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:50:43,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:50:43,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:50:43,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:50:43,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:50:43,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:50:43,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:50:43,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:50:43,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:50:43,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:50:43,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:50:43,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:50:43,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:50:43,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:50:43,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:50:43,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:50:43,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:50:43,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:50:43,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:50:43,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:50:43,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:50:43,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:50:43,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:50:43,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:50:43,947 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:50:43,964 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:50:43,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:50:43,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:50:43,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:50:43,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:50:43,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:50:43,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:50:43,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:50:43,971 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:50:43,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:50:43,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:50:43,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:50:43,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:50:43,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:50:43,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:50:43,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:50:43,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:50:43,972 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:50:43,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:50:43,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:50:43,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:50:43,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:50:43,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:50:43,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:50:43,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:50:43,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:50:43,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:50:43,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:50:43,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:50:43,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:50:43,974 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:50:43,975 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:50:43,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:50:43,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:50:43,975 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2021-12-22 13:50:44,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:50:44,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:50:44,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:50:44,183 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:50:44,183 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:50:44,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-12-22 13:50:44,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4e2cc3db/8ec7c0f71eca4c45a1458158e4c54f10/FLAGff5bc3eab [2021-12-22 13:50:44,635 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:50:44,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2021-12-22 13:50:44,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4e2cc3db/8ec7c0f71eca4c45a1458158e4c54f10/FLAGff5bc3eab [2021-12-22 13:50:45,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4e2cc3db/8ec7c0f71eca4c45a1458158e4c54f10 [2021-12-22 13:50:45,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:50:45,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:50:45,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:50:45,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:50:45,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:50:45,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b142324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45, skipping insertion in model container [2021-12-22 13:50:45,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:50:45,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:50:45,222 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/unroll-cond-2.wvr.c[2474,2487] [2021-12-22 13:50:45,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:50:45,240 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:50:45,272 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/unroll-cond-2.wvr.c[2474,2487] [2021-12-22 13:50:45,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:50:45,286 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:50:45,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45 WrapperNode [2021-12-22 13:50:45,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:50:45,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:50:45,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:50:45,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:50:45,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,327 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2021-12-22 13:50:45,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:50:45,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:50:45,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:50:45,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:50:45,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:50:45,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:50:45,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:50:45,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:50:45,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (1/1) ... [2021-12-22 13:50:45,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:50:45,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:45,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:50:45,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:50:45,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:50:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:50:45,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:50:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:50:45,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:50:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:50:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:50:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:50:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 13:50:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:50:45,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:50:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:50:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:50:45,433 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:50:45,564 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:50:45,567 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:50:45,797 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:50:45,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:50:45,807 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 13:50:45,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:50:45 BoogieIcfgContainer [2021-12-22 13:50:45,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:50:45,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:50:45,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:50:45,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:50:45,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:50:45" (1/3) ... [2021-12-22 13:50:45,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d8479f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:50:45, skipping insertion in model container [2021-12-22 13:50:45,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:50:45" (2/3) ... [2021-12-22 13:50:45,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d8479f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:50:45, skipping insertion in model container [2021-12-22 13:50:45,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:50:45" (3/3) ... [2021-12-22 13:50:45,817 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2021-12-22 13:50:45,820 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:50:45,821 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:50:45,821 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:50:45,821 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:50:45,876 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,882 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,883 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,884 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,885 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,886 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,887 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,888 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,889 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,890 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,890 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,890 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,890 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,891 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,891 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,891 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,892 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,892 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,892 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,893 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,894 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,894 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,894 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,895 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,896 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,897 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,898 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,899 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,899 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,899 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,900 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,901 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,902 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,903 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,904 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,905 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,906 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,907 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,908 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,909 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,910 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,910 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,910 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,910 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,910 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,911 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,911 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,912 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,913 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,917 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~i~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,918 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,919 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,920 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,920 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,920 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,921 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:50:45,924 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:50:45,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:50:45,958 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:50:45,959 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-22 13:50:45,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 374 flow [2021-12-22 13:50:46,009 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2021-12-22 13:50:46,009 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:50:46,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2021-12-22 13:50:46,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 374 flow [2021-12-22 13:50:46,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2021-12-22 13:50:46,038 INFO L129 PetriNetUnfolder]: 14/165 cut-off events. [2021-12-22 13:50:46,038 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:50:46,038 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:46,039 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:50:46,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:46,043 INFO L85 PathProgramCache]: Analyzing trace with hash -999352640, now seen corresponding path program 1 times [2021-12-22 13:50:46,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:46,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442206876] [2021-12-22 13:50:46,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:46,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:46,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:46,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442206876] [2021-12-22 13:50:46,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442206876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:46,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:46,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:50:46,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851717657] [2021-12-22 13:50:46,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:46,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:50:46,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:46,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:50:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:50:46,222 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 179 [2021-12-22 13:50:46,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 168 transitions, 348 flow. Second operand has 2 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:46,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 179 [2021-12-22 13:50:46,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:46,258 INFO L129 PetriNetUnfolder]: 4/157 cut-off events. [2021-12-22 13:50:46,266 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-22 13:50:46,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 157 events. 4/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 0 based on Foata normal form. 14/159 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2021-12-22 13:50:46,269 INFO L132 encePairwiseOnDemand]: 168/179 looper letters, 4 selfloop transitions, 0 changer transitions 4/157 dead transitions. [2021-12-22 13:50:46,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 334 flow [2021-12-22 13:50:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:50:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:50:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 341 transitions. [2021-12-22 13:50:46,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.952513966480447 [2021-12-22 13:50:46,279 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 341 transitions. [2021-12-22 13:50:46,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 341 transitions. [2021-12-22 13:50:46,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:46,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 341 transitions. [2021-12-22 13:50:46,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,289 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,290 INFO L186 Difference]: Start difference. First operand has 160 places, 168 transitions, 348 flow. Second operand 2 states and 341 transitions. [2021-12-22 13:50:46,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 334 flow [2021-12-22 13:50:46,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:50:46,296 INFO L242 Difference]: Finished difference. Result has 157 places, 153 transitions, 310 flow [2021-12-22 13:50:46,298 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2021-12-22 13:50:46,300 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, -3 predicate places. [2021-12-22 13:50:46,301 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 310 flow [2021-12-22 13:50:46,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,301 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:46,301 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:50:46,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:50:46,302 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2047656499, now seen corresponding path program 1 times [2021-12-22 13:50:46,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:46,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998902189] [2021-12-22 13:50:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:46,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:46,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:46,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998902189] [2021-12-22 13:50:46,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998902189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:46,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:46,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:50:46,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640160926] [2021-12-22 13:50:46,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:46,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:50:46,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:50:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:50:46,473 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-12-22 13:50:46,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 310 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:46,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-12-22 13:50:46,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:46,704 INFO L129 PetriNetUnfolder]: 149/816 cut-off events. [2021-12-22 13:50:46,705 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2021-12-22 13:50:46,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 816 events. 149/816 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5009 event pairs, 65 based on Foata normal form. 0/719 useless extension candidates. Maximal degree in co-relation 1109. Up to 152 conditions per place. [2021-12-22 13:50:46,709 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 48 selfloop transitions, 7 changer transitions 0/186 dead transitions. [2021-12-22 13:50:46,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 186 transitions, 491 flow [2021-12-22 13:50:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:50:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:50:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2021-12-22 13:50:46,713 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8631284916201117 [2021-12-22 13:50:46,713 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2021-12-22 13:50:46,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2021-12-22 13:50:46,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:46,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2021-12-22 13:50:46,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,718 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,719 INFO L186 Difference]: Start difference. First operand has 157 places, 153 transitions, 310 flow. Second operand 6 states and 927 transitions. [2021-12-22 13:50:46,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 186 transitions, 491 flow [2021-12-22 13:50:46,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 186 transitions, 491 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:50:46,722 INFO L242 Difference]: Finished difference. Result has 161 places, 157 transitions, 352 flow [2021-12-22 13:50:46,722 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=161, PETRI_TRANSITIONS=157} [2021-12-22 13:50:46,723 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 1 predicate places. [2021-12-22 13:50:46,723 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 157 transitions, 352 flow [2021-12-22 13:50:46,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,724 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:46,724 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:50:46,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:50:46,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:46,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1248426905, now seen corresponding path program 2 times [2021-12-22 13:50:46,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:46,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487180051] [2021-12-22 13:50:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:46,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:46,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:46,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487180051] [2021-12-22 13:50:46,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487180051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:46,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:46,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:50:46,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727832063] [2021-12-22 13:50:46,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:46,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:50:46,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:46,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:50:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:50:46,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 179 [2021-12-22 13:50:46,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 157 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:46,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 179 [2021-12-22 13:50:46,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:46,955 INFO L129 PetriNetUnfolder]: 132/851 cut-off events. [2021-12-22 13:50:46,956 INFO L130 PetriNetUnfolder]: For 141/168 co-relation queries the response was YES. [2021-12-22 13:50:46,958 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1260 conditions, 851 events. 132/851 cut-off events. For 141/168 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5375 event pairs, 61 based on Foata normal form. 34/829 useless extension candidates. Maximal degree in co-relation 1253. Up to 165 conditions per place. [2021-12-22 13:50:46,960 INFO L132 encePairwiseOnDemand]: 173/179 looper letters, 33 selfloop transitions, 8 changer transitions 0/176 dead transitions. [2021-12-22 13:50:46,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 176 transitions, 496 flow [2021-12-22 13:50:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:50:46,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-22 13:50:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2021-12-22 13:50:46,962 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8784916201117319 [2021-12-22 13:50:46,962 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2021-12-22 13:50:46,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2021-12-22 13:50:46,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:46,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2021-12-22 13:50:46,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,966 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,966 INFO L186 Difference]: Start difference. First operand has 161 places, 157 transitions, 352 flow. Second operand 4 states and 629 transitions. [2021-12-22 13:50:46,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 176 transitions, 496 flow [2021-12-22 13:50:46,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 176 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:50:46,970 INFO L242 Difference]: Finished difference. Result has 164 places, 162 transitions, 398 flow [2021-12-22 13:50:46,970 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=398, PETRI_PLACES=164, PETRI_TRANSITIONS=162} [2021-12-22 13:50:46,971 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 4 predicate places. [2021-12-22 13:50:46,971 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 162 transitions, 398 flow [2021-12-22 13:50:46,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:46,971 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:46,972 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] [2021-12-22 13:50:46,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:50:46,972 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:46,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash 561552515, now seen corresponding path program 1 times [2021-12-22 13:50:46,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:46,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450272936] [2021-12-22 13:50:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:46,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:47,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:47,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450272936] [2021-12-22 13:50:47,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450272936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:47,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:47,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:50:47,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198065462] [2021-12-22 13:50:47,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:47,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:50:47,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:47,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:50:47,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:50:47,136 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-12-22 13:50:47,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 162 transitions, 398 flow. Second operand has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:47,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-12-22 13:50:47,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:47,373 INFO L129 PetriNetUnfolder]: 268/1433 cut-off events. [2021-12-22 13:50:47,373 INFO L130 PetriNetUnfolder]: For 426/440 co-relation queries the response was YES. [2021-12-22 13:50:47,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 1433 events. 268/1433 cut-off events. For 426/440 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 10141 event pairs, 95 based on Foata normal form. 10/1343 useless extension candidates. Maximal degree in co-relation 2416. Up to 263 conditions per place. [2021-12-22 13:50:47,381 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 69 selfloop transitions, 16 changer transitions 1/217 dead transitions. [2021-12-22 13:50:47,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 217 transitions, 802 flow [2021-12-22 13:50:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:50:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:50:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 943 transitions. [2021-12-22 13:50:47,383 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8780260707635009 [2021-12-22 13:50:47,383 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 943 transitions. [2021-12-22 13:50:47,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 943 transitions. [2021-12-22 13:50:47,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:47,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 943 transitions. [2021-12-22 13:50:47,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.16666666666666) internal successors, (943), 6 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,388 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,388 INFO L186 Difference]: Start difference. First operand has 164 places, 162 transitions, 398 flow. Second operand 6 states and 943 transitions. [2021-12-22 13:50:47,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 217 transitions, 802 flow [2021-12-22 13:50:47,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 217 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:50:47,394 INFO L242 Difference]: Finished difference. Result has 173 places, 174 transitions, 553 flow [2021-12-22 13:50:47,394 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=553, PETRI_PLACES=173, PETRI_TRANSITIONS=174} [2021-12-22 13:50:47,395 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 13 predicate places. [2021-12-22 13:50:47,395 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 174 transitions, 553 flow [2021-12-22 13:50:47,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,396 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:47,396 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] [2021-12-22 13:50:47,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:50:47,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:47,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:47,397 INFO L85 PathProgramCache]: Analyzing trace with hash 989028107, now seen corresponding path program 2 times [2021-12-22 13:50:47,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:47,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291265843] [2021-12-22 13:50:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:47,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:47,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291265843] [2021-12-22 13:50:47,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291265843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:47,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:47,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:50:47,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242168661] [2021-12-22 13:50:47,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:47,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:50:47,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:47,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:50:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:50:47,602 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-12-22 13:50:47,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 174 transitions, 553 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:47,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-12-22 13:50:47,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:47,836 INFO L129 PetriNetUnfolder]: 274/1476 cut-off events. [2021-12-22 13:50:47,836 INFO L130 PetriNetUnfolder]: For 1043/1047 co-relation queries the response was YES. [2021-12-22 13:50:47,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1476 events. 274/1476 cut-off events. For 1043/1047 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 10581 event pairs, 103 based on Foata normal form. 6/1383 useless extension candidates. Maximal degree in co-relation 2811. Up to 292 conditions per place. [2021-12-22 13:50:47,846 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 63 selfloop transitions, 22 changer transitions 1/217 dead transitions. [2021-12-22 13:50:47,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 217 transitions, 945 flow [2021-12-22 13:50:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:50:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:50:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2021-12-22 13:50:47,848 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8587390263367917 [2021-12-22 13:50:47,848 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2021-12-22 13:50:47,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2021-12-22 13:50:47,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:47,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2021-12-22 13:50:47,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,854 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,854 INFO L186 Difference]: Start difference. First operand has 173 places, 174 transitions, 553 flow. Second operand 7 states and 1076 transitions. [2021-12-22 13:50:47,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 217 transitions, 945 flow [2021-12-22 13:50:47,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 217 transitions, 945 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:50:47,861 INFO L242 Difference]: Finished difference. Result has 183 places, 179 transitions, 661 flow [2021-12-22 13:50:47,862 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=661, PETRI_PLACES=183, PETRI_TRANSITIONS=179} [2021-12-22 13:50:47,862 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 23 predicate places. [2021-12-22 13:50:47,863 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 179 transitions, 661 flow [2021-12-22 13:50:47,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:47,863 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:47,863 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] [2021-12-22 13:50:47,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:50:47,864 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:47,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1515646687, now seen corresponding path program 3 times [2021-12-22 13:50:47,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:47,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745416176] [2021-12-22 13:50:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:47,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:48,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:48,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745416176] [2021-12-22 13:50:48,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745416176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:48,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:48,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:50:48,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780223934] [2021-12-22 13:50:48,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:48,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:50:48,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:48,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:50:48,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:50:48,003 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2021-12-22 13:50:48,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 179 transitions, 661 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:48,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2021-12-22 13:50:48,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:48,219 INFO L129 PetriNetUnfolder]: 274/1435 cut-off events. [2021-12-22 13:50:48,219 INFO L130 PetriNetUnfolder]: For 1929/1929 co-relation queries the response was YES. [2021-12-22 13:50:48,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3017 conditions, 1435 events. 274/1435 cut-off events. For 1929/1929 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10195 event pairs, 105 based on Foata normal form. 3/1339 useless extension candidates. Maximal degree in co-relation 2998. Up to 206 conditions per place. [2021-12-22 13:50:48,229 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 70 selfloop transitions, 29 changer transitions 1/231 dead transitions. [2021-12-22 13:50:48,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 231 transitions, 1152 flow [2021-12-22 13:50:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:50:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:50:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1235 transitions. [2021-12-22 13:50:48,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8624301675977654 [2021-12-22 13:50:48,256 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1235 transitions. [2021-12-22 13:50:48,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1235 transitions. [2021-12-22 13:50:48,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:48,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1235 transitions. [2021-12-22 13:50:48,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,261 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,261 INFO L186 Difference]: Start difference. First operand has 183 places, 179 transitions, 661 flow. Second operand 8 states and 1235 transitions. [2021-12-22 13:50:48,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 231 transitions, 1152 flow [2021-12-22 13:50:48,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 231 transitions, 1102 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-12-22 13:50:48,273 INFO L242 Difference]: Finished difference. Result has 190 places, 187 transitions, 787 flow [2021-12-22 13:50:48,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=787, PETRI_PLACES=190, PETRI_TRANSITIONS=187} [2021-12-22 13:50:48,277 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 30 predicate places. [2021-12-22 13:50:48,277 INFO L470 AbstractCegarLoop]: Abstraction has has 190 places, 187 transitions, 787 flow [2021-12-22 13:50:48,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,278 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:48,278 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] [2021-12-22 13:50:48,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:50:48,278 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:48,280 INFO L85 PathProgramCache]: Analyzing trace with hash 11227386, now seen corresponding path program 1 times [2021-12-22 13:50:48,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:48,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226426876] [2021-12-22 13:50:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:48,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:48,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226426876] [2021-12-22 13:50:48,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226426876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:50:48,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:50:48,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:50:48,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712551608] [2021-12-22 13:50:48,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:48,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:50:48,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:48,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:50:48,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:50:48,414 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 179 [2021-12-22 13:50:48,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 187 transitions, 787 flow. Second operand has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:48,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 179 [2021-12-22 13:50:48,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:48,553 INFO L129 PetriNetUnfolder]: 106/1068 cut-off events. [2021-12-22 13:50:48,554 INFO L130 PetriNetUnfolder]: For 971/1011 co-relation queries the response was YES. [2021-12-22 13:50:48,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 1068 events. 106/1068 cut-off events. For 971/1011 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7362 event pairs, 36 based on Foata normal form. 10/999 useless extension candidates. Maximal degree in co-relation 1817. Up to 144 conditions per place. [2021-12-22 13:50:48,559 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 33 selfloop transitions, 7 changer transitions 0/191 dead transitions. [2021-12-22 13:50:48,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 191 transitions, 875 flow [2021-12-22 13:50:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:50:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:50:48,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1057 transitions. [2021-12-22 13:50:48,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7381284916201117 [2021-12-22 13:50:48,562 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1057 transitions. [2021-12-22 13:50:48,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1057 transitions. [2021-12-22 13:50:48,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:48,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1057 transitions. [2021-12-22 13:50:48,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,568 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,568 INFO L186 Difference]: Start difference. First operand has 190 places, 187 transitions, 787 flow. Second operand 8 states and 1057 transitions. [2021-12-22 13:50:48,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 191 transitions, 875 flow [2021-12-22 13:50:48,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 191 transitions, 846 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-12-22 13:50:48,574 INFO L242 Difference]: Finished difference. Result has 196 places, 188 transitions, 780 flow [2021-12-22 13:50:48,575 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=780, PETRI_PLACES=196, PETRI_TRANSITIONS=188} [2021-12-22 13:50:48,575 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 36 predicate places. [2021-12-22 13:50:48,576 INFO L470 AbstractCegarLoop]: Abstraction has has 196 places, 188 transitions, 780 flow [2021-12-22 13:50:48,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:48,576 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:48,576 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] [2021-12-22 13:50:48,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:50:48,577 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash 715964285, now seen corresponding path program 1 times [2021-12-22 13:50:48,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:48,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058719934] [2021-12-22 13:50:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:48,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:48,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:48,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058719934] [2021-12-22 13:50:48,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058719934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:48,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328476119] [2021-12-22 13:50:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:48,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:48,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:48,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:48,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:50:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:48,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-22 13:50:48,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:49,737 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 13:50:49,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-12-22 13:50:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:49,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:50,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:50:50,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2021-12-22 13:50:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:50:51,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328476119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:50:51,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:50:51,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 19] total 38 [2021-12-22 13:50:51,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35686390] [2021-12-22 13:50:51,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:50:51,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 13:50:51,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 13:50:51,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 13:50:51,384 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 179 [2021-12-22 13:50:51,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 188 transitions, 780 flow. Second operand has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:51,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:51,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 179 [2021-12-22 13:50:51,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:50:57,475 INFO L129 PetriNetUnfolder]: 6079/13224 cut-off events. [2021-12-22 13:50:57,475 INFO L130 PetriNetUnfolder]: For 19143/19143 co-relation queries the response was YES. [2021-12-22 13:50:57,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31644 conditions, 13224 events. 6079/13224 cut-off events. For 19143/19143 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 120569 event pairs, 801 based on Foata normal form. 9/12603 useless extension candidates. Maximal degree in co-relation 31621. Up to 2849 conditions per place. [2021-12-22 13:50:57,564 INFO L132 encePairwiseOnDemand]: 133/179 looper letters, 512 selfloop transitions, 105 changer transitions 283/964 dead transitions. [2021-12-22 13:50:57,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 964 transitions, 5535 flow [2021-12-22 13:50:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-22 13:50:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-12-22 13:50:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 7546 transitions. [2021-12-22 13:50:57,584 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46325741297808337 [2021-12-22 13:50:57,584 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 7546 transitions. [2021-12-22 13:50:57,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 7546 transitions. [2021-12-22 13:50:57,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:50:57,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 7546 transitions. [2021-12-22 13:50:57,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 82.92307692307692) internal successors, (7546), 91 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:57,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:57,624 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:57,624 INFO L186 Difference]: Start difference. First operand has 196 places, 188 transitions, 780 flow. Second operand 91 states and 7546 transitions. [2021-12-22 13:50:57,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 964 transitions, 5535 flow [2021-12-22 13:50:57,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 964 transitions, 5523 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-22 13:50:57,664 INFO L242 Difference]: Finished difference. Result has 340 places, 271 transitions, 1628 flow [2021-12-22 13:50:57,664 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=1628, PETRI_PLACES=340, PETRI_TRANSITIONS=271} [2021-12-22 13:50:57,665 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 180 predicate places. [2021-12-22 13:50:57,665 INFO L470 AbstractCegarLoop]: Abstraction has has 340 places, 271 transitions, 1628 flow [2021-12-22 13:50:57,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:57,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:50:57,666 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] [2021-12-22 13:50:57,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:50:57,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:57,871 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:50:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:50:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1840390791, now seen corresponding path program 1 times [2021-12-22 13:50:57,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:50:57,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382779722] [2021-12-22 13:50:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:57,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:50:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:58,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:50:58,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382779722] [2021-12-22 13:50:58,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382779722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703563398] [2021-12-22 13:50:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:50:58,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:50:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:50:58,091 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:50:58,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:50:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:50:58,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 13:50:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:50:58,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 13:50:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:50:58,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:50:58,796 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-22 13:50:58,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-22 13:50:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:50:58,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703563398] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:50:58,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:50:58,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-12-22 13:50:58,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081931310] [2021-12-22 13:50:58,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:50:58,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:50:58,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:50:58,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:50:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:50:58,911 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-12-22 13:50:58,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 271 transitions, 1628 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:50:58,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:50:58,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-12-22 13:50:58,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:00,122 INFO L129 PetriNetUnfolder]: 1832/5824 cut-off events. [2021-12-22 13:51:00,122 INFO L130 PetriNetUnfolder]: For 16481/16703 co-relation queries the response was YES. [2021-12-22 13:51:00,163 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16849 conditions, 5824 events. 1832/5824 cut-off events. For 16481/16703 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 53801 event pairs, 339 based on Foata normal form. 32/5651 useless extension candidates. Maximal degree in co-relation 16766. Up to 1102 conditions per place. [2021-12-22 13:51:00,180 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 117 selfloop transitions, 68 changer transitions 7/382 dead transitions. [2021-12-22 13:51:00,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 382 transitions, 2426 flow [2021-12-22 13:51:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:51:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-22 13:51:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2514 transitions. [2021-12-22 13:51:00,182 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7022346368715083 [2021-12-22 13:51:00,182 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2514 transitions. [2021-12-22 13:51:00,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2514 transitions. [2021-12-22 13:51:00,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:00,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2514 transitions. [2021-12-22 13:51:00,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 125.7) internal successors, (2514), 20 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:00,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:00,189 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:00,189 INFO L186 Difference]: Start difference. First operand has 340 places, 271 transitions, 1628 flow. Second operand 20 states and 2514 transitions. [2021-12-22 13:51:00,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 382 transitions, 2426 flow [2021-12-22 13:51:00,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 382 transitions, 2202 flow, removed 89 selfloop flow, removed 35 redundant places. [2021-12-22 13:51:00,299 INFO L242 Difference]: Finished difference. Result has 286 places, 317 transitions, 1848 flow [2021-12-22 13:51:00,300 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1848, PETRI_PLACES=286, PETRI_TRANSITIONS=317} [2021-12-22 13:51:00,301 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 126 predicate places. [2021-12-22 13:51:00,301 INFO L470 AbstractCegarLoop]: Abstraction has has 286 places, 317 transitions, 1848 flow [2021-12-22 13:51:00,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:00,302 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:00,302 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] [2021-12-22 13:51:00,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:00,519 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,SelfDestructingSolverStorable8 [2021-12-22 13:51:00,519 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:00,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1978318625, now seen corresponding path program 2 times [2021-12-22 13:51:00,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:00,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048782164] [2021-12-22 13:51:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:00,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:00,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:00,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048782164] [2021-12-22 13:51:00,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048782164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:00,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577196281] [2021-12-22 13:51:00,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:51:00,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:00,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:00,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:00,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:51:00,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:51:00,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:00,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 13:51:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:01,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 13:51:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:01,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:01,222 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-22 13:51:01,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-22 13:51:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:51:01,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577196281] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:01,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:51:01,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-12-22 13:51:01,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262030501] [2021-12-22 13:51:01,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:01,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:51:01,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:01,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:51:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:51:01,390 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-12-22 13:51:01,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 317 transitions, 1848 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:01,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:01,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-12-22 13:51:01,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:02,424 INFO L129 PetriNetUnfolder]: 1915/6204 cut-off events. [2021-12-22 13:51:02,424 INFO L130 PetriNetUnfolder]: For 10755/10930 co-relation queries the response was YES. [2021-12-22 13:51:02,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17884 conditions, 6204 events. 1915/6204 cut-off events. For 10755/10930 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 58644 event pairs, 407 based on Foata normal form. 53/6026 useless extension candidates. Maximal degree in co-relation 17819. Up to 1383 conditions per place. [2021-12-22 13:51:02,477 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 138 selfloop transitions, 63 changer transitions 4/395 dead transitions. [2021-12-22 13:51:02,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 395 transitions, 2591 flow [2021-12-22 13:51:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:51:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-22 13:51:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1899 transitions. [2021-12-22 13:51:02,480 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7072625698324022 [2021-12-22 13:51:02,480 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1899 transitions. [2021-12-22 13:51:02,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1899 transitions. [2021-12-22 13:51:02,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:02,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1899 transitions. [2021-12-22 13:51:02,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.6) internal successors, (1899), 15 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:02,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:02,543 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:02,543 INFO L186 Difference]: Start difference. First operand has 286 places, 317 transitions, 1848 flow. Second operand 15 states and 1899 transitions. [2021-12-22 13:51:02,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 395 transitions, 2591 flow [2021-12-22 13:51:02,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 395 transitions, 2561 flow, removed 15 selfloop flow, removed 2 redundant places. [2021-12-22 13:51:02,586 INFO L242 Difference]: Finished difference. Result has 305 places, 340 transitions, 2171 flow [2021-12-22 13:51:02,587 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2171, PETRI_PLACES=305, PETRI_TRANSITIONS=340} [2021-12-22 13:51:02,588 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 145 predicate places. [2021-12-22 13:51:02,588 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 340 transitions, 2171 flow [2021-12-22 13:51:02,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:02,589 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:02,589 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] [2021-12-22 13:51:02,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 13:51:02,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:02,806 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:02,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:02,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1358415567, now seen corresponding path program 3 times [2021-12-22 13:51:02,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:02,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621593993] [2021-12-22 13:51:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:02,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:02,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:02,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621593993] [2021-12-22 13:51:02,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621593993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:02,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134390758] [2021-12-22 13:51:02,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:51:02,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:02,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:02,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:51:03,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:51:03,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 13:51:03,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:03,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 13:51:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:03,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:03,560 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-22 13:51:03,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-22 13:51:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:51:03,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134390758] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:03,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:51:03,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2021-12-22 13:51:03,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724877714] [2021-12-22 13:51:03,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:03,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:51:03,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:51:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:51:03,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-12-22 13:51:03,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 340 transitions, 2171 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:03,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:03,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-12-22 13:51:03,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:04,887 INFO L129 PetriNetUnfolder]: 2086/6884 cut-off events. [2021-12-22 13:51:04,887 INFO L130 PetriNetUnfolder]: For 14550/14754 co-relation queries the response was YES. [2021-12-22 13:51:04,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21253 conditions, 6884 events. 2086/6884 cut-off events. For 14550/14754 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 67564 event pairs, 335 based on Foata normal form. 45/6685 useless extension candidates. Maximal degree in co-relation 21180. Up to 1297 conditions per place. [2021-12-22 13:51:04,959 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 156 selfloop transitions, 79 changer transitions 9/434 dead transitions. [2021-12-22 13:51:04,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 434 transitions, 3115 flow [2021-12-22 13:51:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:51:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-22 13:51:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1926 transitions. [2021-12-22 13:51:04,962 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.71731843575419 [2021-12-22 13:51:04,962 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1926 transitions. [2021-12-22 13:51:04,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1926 transitions. [2021-12-22 13:51:04,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:04,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1926 transitions. [2021-12-22 13:51:04,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:04,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:04,968 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:04,968 INFO L186 Difference]: Start difference. First operand has 305 places, 340 transitions, 2171 flow. Second operand 15 states and 1926 transitions. [2021-12-22 13:51:04,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 434 transitions, 3115 flow [2021-12-22 13:51:05,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 434 transitions, 3071 flow, removed 22 selfloop flow, removed 2 redundant places. [2021-12-22 13:51:05,039 INFO L242 Difference]: Finished difference. Result has 323 places, 359 transitions, 2537 flow [2021-12-22 13:51:05,040 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2537, PETRI_PLACES=323, PETRI_TRANSITIONS=359} [2021-12-22 13:51:05,040 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 163 predicate places. [2021-12-22 13:51:05,040 INFO L470 AbstractCegarLoop]: Abstraction has has 323 places, 359 transitions, 2537 flow [2021-12-22 13:51:05,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:05,041 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:05,041 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] [2021-12-22 13:51:05,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 13:51:05,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:05,259 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:05,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:05,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1788832759, now seen corresponding path program 4 times [2021-12-22 13:51:05,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:05,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696320541] [2021-12-22 13:51:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:05,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:05,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:05,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696320541] [2021-12-22 13:51:05,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696320541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:05,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111265630] [2021-12-22 13:51:05,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:51:05,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:05,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:05,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:05,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:51:05,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:51:05,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:05,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-22 13:51:05,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:05,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 13:51:06,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:51:06,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:51:06,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 13:51:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:06,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:06,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:51:06,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2021-12-22 13:51:06,800 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-22 13:51:06,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2021-12-22 13:51:06,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 13:51:06,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2021-12-22 13:51:06,813 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-22 13:51:06,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2021-12-22 13:51:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:06,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111265630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:06,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:06,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 31 [2021-12-22 13:51:06,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089720795] [2021-12-22 13:51:06,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:06,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-22 13:51:06,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:06,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-22 13:51:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=674, Unknown=46, NotChecked=0, Total=930 [2021-12-22 13:51:06,966 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2021-12-22 13:51:06,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 359 transitions, 2537 flow. Second operand has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:06,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:06,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2021-12-22 13:51:06,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:08,724 INFO L129 PetriNetUnfolder]: 2143/7136 cut-off events. [2021-12-22 13:51:08,725 INFO L130 PetriNetUnfolder]: For 20644/20860 co-relation queries the response was YES. [2021-12-22 13:51:08,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23603 conditions, 7136 events. 2143/7136 cut-off events. For 20644/20860 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 70749 event pairs, 368 based on Foata normal form. 53/6922 useless extension candidates. Maximal degree in co-relation 23523. Up to 1611 conditions per place. [2021-12-22 13:51:08,801 INFO L132 encePairwiseOnDemand]: 155/179 looper letters, 173 selfloop transitions, 97 changer transitions 4/442 dead transitions. [2021-12-22 13:51:08,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 442 transitions, 3584 flow [2021-12-22 13:51:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 13:51:08,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-22 13:51:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2971 transitions. [2021-12-22 13:51:08,804 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5723367366596032 [2021-12-22 13:51:08,805 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2971 transitions. [2021-12-22 13:51:08,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2971 transitions. [2021-12-22 13:51:08,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:08,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2971 transitions. [2021-12-22 13:51:08,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.44827586206897) internal successors, (2971), 29 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:08,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:08,814 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:08,814 INFO L186 Difference]: Start difference. First operand has 323 places, 359 transitions, 2537 flow. Second operand 29 states and 2971 transitions. [2021-12-22 13:51:08,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 442 transitions, 3584 flow [2021-12-22 13:51:08,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 442 transitions, 3420 flow, removed 43 selfloop flow, removed 6 redundant places. [2021-12-22 13:51:08,904 INFO L242 Difference]: Finished difference. Result has 353 places, 380 transitions, 2910 flow [2021-12-22 13:51:08,904 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2910, PETRI_PLACES=353, PETRI_TRANSITIONS=380} [2021-12-22 13:51:08,905 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 193 predicate places. [2021-12-22 13:51:08,905 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 380 transitions, 2910 flow [2021-12-22 13:51:08,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:08,906 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:08,906 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] [2021-12-22 13:51:08,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:09,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 13:51:09,124 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash -813689031, now seen corresponding path program 5 times [2021-12-22 13:51:09,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:09,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489044853] [2021-12-22 13:51:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:09,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:09,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489044853] [2021-12-22 13:51:09,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489044853] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746600217] [2021-12-22 13:51:09,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:51:09,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:09,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:09,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:09,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:51:09,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:51:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-22 13:51:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:09,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 13:51:09,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:51:10,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:51:10,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 13:51:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:10,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:10,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:51:10,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2021-12-22 13:51:10,597 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-22 13:51:10,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 173 [2021-12-22 13:51:10,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 13:51:10,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 59 [2021-12-22 13:51:10,606 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-22 13:51:10,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 94 [2021-12-22 13:51:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:10,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746600217] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:10,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:10,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 32 [2021-12-22 13:51:10,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284799002] [2021-12-22 13:51:10,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:10,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 13:51:10,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:10,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 13:51:10,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=720, Unknown=57, NotChecked=0, Total=992 [2021-12-22 13:51:10,741 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2021-12-22 13:51:10,742 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 380 transitions, 2910 flow. Second operand has 32 states, 32 states have (on average 101.0625) internal successors, (3234), 32 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:10,743 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:10,743 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2021-12-22 13:51:10,743 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:12,408 INFO L129 PetriNetUnfolder]: 2191/7494 cut-off events. [2021-12-22 13:51:12,409 INFO L130 PetriNetUnfolder]: For 25502/25842 co-relation queries the response was YES. [2021-12-22 13:51:12,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25725 conditions, 7494 events. 2191/7494 cut-off events. For 25502/25842 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 75930 event pairs, 444 based on Foata normal form. 90/7296 useless extension candidates. Maximal degree in co-relation 25636. Up to 1946 conditions per place. [2021-12-22 13:51:12,494 INFO L132 encePairwiseOnDemand]: 156/179 looper letters, 190 selfloop transitions, 76 changer transitions 4/438 dead transitions. [2021-12-22 13:51:12,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 438 transitions, 3767 flow [2021-12-22 13:51:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 13:51:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-22 13:51:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2365 transitions. [2021-12-22 13:51:12,497 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5744474131649259 [2021-12-22 13:51:12,497 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2365 transitions. [2021-12-22 13:51:12,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2365 transitions. [2021-12-22 13:51:12,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:12,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2365 transitions. [2021-12-22 13:51:12,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 102.82608695652173) internal successors, (2365), 23 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:12,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:12,504 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:12,504 INFO L186 Difference]: Start difference. First operand has 353 places, 380 transitions, 2910 flow. Second operand 23 states and 2365 transitions. [2021-12-22 13:51:12,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 438 transitions, 3767 flow [2021-12-22 13:51:12,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 438 transitions, 3641 flow, removed 52 selfloop flow, removed 12 redundant places. [2021-12-22 13:51:12,663 INFO L242 Difference]: Finished difference. Result has 366 places, 389 transitions, 3068 flow [2021-12-22 13:51:12,664 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3068, PETRI_PLACES=366, PETRI_TRANSITIONS=389} [2021-12-22 13:51:12,665 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 206 predicate places. [2021-12-22 13:51:12,665 INFO L470 AbstractCegarLoop]: Abstraction has has 366 places, 389 transitions, 3068 flow [2021-12-22 13:51:12,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 101.0625) internal successors, (3234), 32 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:12,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:12,666 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] [2021-12-22 13:51:12,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:12,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:12,880 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:12,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1628726643, now seen corresponding path program 6 times [2021-12-22 13:51:12,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:12,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669181079] [2021-12-22 13:51:12,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:12,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:13,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:13,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669181079] [2021-12-22 13:51:13,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669181079] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:13,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626679771] [2021-12-22 13:51:13,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:51:13,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:13,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:13,064 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:13,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:51:13,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-22 13:51:13,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:13,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 13:51:13,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:13,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 13:51:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:13,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:13,741 INFO L353 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-22 13:51:13,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2021-12-22 13:51:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:51:13,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626679771] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:13,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:51:13,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2021-12-22 13:51:13,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561918427] [2021-12-22 13:51:13,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:13,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:51:13,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:51:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:51:13,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2021-12-22 13:51:13,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 389 transitions, 3068 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:13,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:13,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2021-12-22 13:51:13,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:15,349 INFO L129 PetriNetUnfolder]: 2215/7563 cut-off events. [2021-12-22 13:51:15,349 INFO L130 PetriNetUnfolder]: For 29137/29470 co-relation queries the response was YES. [2021-12-22 13:51:15,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26670 conditions, 7563 events. 2215/7563 cut-off events. For 29137/29470 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 76905 event pairs, 459 based on Foata normal form. 90/7355 useless extension candidates. Maximal degree in co-relation 26577. Up to 1935 conditions per place. [2021-12-22 13:51:15,424 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 176 selfloop transitions, 73 changer transitions 4/443 dead transitions. [2021-12-22 13:51:15,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 443 transitions, 3848 flow [2021-12-22 13:51:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 13:51:15,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-22 13:51:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2250 transitions. [2021-12-22 13:51:15,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6983240223463687 [2021-12-22 13:51:15,427 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2250 transitions. [2021-12-22 13:51:15,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2250 transitions. [2021-12-22 13:51:15,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:15,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2250 transitions. [2021-12-22 13:51:15,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.0) internal successors, (2250), 18 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:15,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:15,432 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:15,432 INFO L186 Difference]: Start difference. First operand has 366 places, 389 transitions, 3068 flow. Second operand 18 states and 2250 transitions. [2021-12-22 13:51:15,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 443 transitions, 3848 flow [2021-12-22 13:51:15,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 443 transitions, 3719 flow, removed 19 selfloop flow, removed 15 redundant places. [2021-12-22 13:51:15,561 INFO L242 Difference]: Finished difference. Result has 369 places, 393 transitions, 3154 flow [2021-12-22 13:51:15,561 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3154, PETRI_PLACES=369, PETRI_TRANSITIONS=393} [2021-12-22 13:51:15,562 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 209 predicate places. [2021-12-22 13:51:15,562 INFO L470 AbstractCegarLoop]: Abstraction has has 369 places, 393 transitions, 3154 flow [2021-12-22 13:51:15,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:15,562 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:15,562 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] [2021-12-22 13:51:15,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:15,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:15,779 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:15,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1542285585, now seen corresponding path program 7 times [2021-12-22 13:51:15,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:15,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404959757] [2021-12-22 13:51:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:15,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:15,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:15,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404959757] [2021-12-22 13:51:15,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404959757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:15,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722499931] [2021-12-22 13:51:15,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-22 13:51:15,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:15,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:15,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:15,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:51:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:16,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-22 13:51:16,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:16,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 13:51:16,246 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 13:51:16,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 13:51:16,500 INFO L387 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 [2021-12-22 13:51:16,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 13:51:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:16,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:16,702 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_272 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_272) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)) is different from false [2021-12-22 13:51:16,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:51:16,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2021-12-22 13:51:16,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-22 13:51:17,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-22 13:51:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:17,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722499931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:17,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:17,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 26 [2021-12-22 13:51:17,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067555445] [2021-12-22 13:51:17,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:17,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 13:51:17,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:17,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 13:51:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=519, Unknown=1, NotChecked=46, Total=650 [2021-12-22 13:51:17,319 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2021-12-22 13:51:17,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 393 transitions, 3154 flow. Second operand has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:17,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:17,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2021-12-22 13:51:17,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:19,567 INFO L129 PetriNetUnfolder]: 2445/8425 cut-off events. [2021-12-22 13:51:19,567 INFO L130 PetriNetUnfolder]: For 33858/34098 co-relation queries the response was YES. [2021-12-22 13:51:19,640 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29776 conditions, 8425 events. 2445/8425 cut-off events. For 33858/34098 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 88381 event pairs, 420 based on Foata normal form. 60/8171 useless extension candidates. Maximal degree in co-relation 29682. Up to 1538 conditions per place. [2021-12-22 13:51:19,665 INFO L132 encePairwiseOnDemand]: 158/179 looper letters, 204 selfloop transitions, 137 changer transitions 13/530 dead transitions. [2021-12-22 13:51:19,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 530 transitions, 4858 flow [2021-12-22 13:51:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:51:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-22 13:51:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3329 transitions. [2021-12-22 13:51:19,675 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5999279149396287 [2021-12-22 13:51:19,675 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3329 transitions. [2021-12-22 13:51:19,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3329 transitions. [2021-12-22 13:51:19,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:19,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3329 transitions. [2021-12-22 13:51:19,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 107.38709677419355) internal successors, (3329), 31 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:19,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 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) [2021-12-22 13:51:19,683 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 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) [2021-12-22 13:51:19,683 INFO L186 Difference]: Start difference. First operand has 369 places, 393 transitions, 3154 flow. Second operand 31 states and 3329 transitions. [2021-12-22 13:51:19,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 530 transitions, 4858 flow [2021-12-22 13:51:19,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 530 transitions, 4629 flow, removed 35 selfloop flow, removed 14 redundant places. [2021-12-22 13:51:19,813 INFO L242 Difference]: Finished difference. Result has 395 places, 434 transitions, 3901 flow [2021-12-22 13:51:19,814 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3901, PETRI_PLACES=395, PETRI_TRANSITIONS=434} [2021-12-22 13:51:19,814 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 235 predicate places. [2021-12-22 13:51:19,814 INFO L470 AbstractCegarLoop]: Abstraction has has 395 places, 434 transitions, 3901 flow [2021-12-22 13:51:19,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:19,815 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:19,815 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] [2021-12-22 13:51:19,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 13:51:20,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:51:20,032 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:20,033 INFO L85 PathProgramCache]: Analyzing trace with hash 623556553, now seen corresponding path program 8 times [2021-12-22 13:51:20,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:20,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274651245] [2021-12-22 13:51:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:20,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:20,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:20,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274651245] [2021-12-22 13:51:20,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274651245] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:20,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145129371] [2021-12-22 13:51:20,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:51:20,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:20,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:20,272 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:20,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:51:20,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:51:20,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:20,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-22 13:51:20,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:20,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:51:20,969 INFO L387 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 14 treesize of output 16 [2021-12-22 13:51:21,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 13:51:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:21,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:21,149 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_297 (Array Int Int))) (= c_~x1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_297) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2021-12-22 13:51:21,162 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_297 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_297) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2021-12-22 13:51:21,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:51:21,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2021-12-22 13:51:21,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-22 13:51:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:21,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145129371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:21,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:21,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 34 [2021-12-22 13:51:21,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022895717] [2021-12-22 13:51:21,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:21,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 13:51:21,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:21,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 13:51:21,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=870, Unknown=2, NotChecked=122, Total=1122 [2021-12-22 13:51:21,538 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2021-12-22 13:51:21,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 434 transitions, 3901 flow. Second operand has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:21,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:21,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2021-12-22 13:51:21,540 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:23,988 INFO L129 PetriNetUnfolder]: 2875/9952 cut-off events. [2021-12-22 13:51:23,988 INFO L130 PetriNetUnfolder]: For 60957/61318 co-relation queries the response was YES. [2021-12-22 13:51:24,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38004 conditions, 9952 events. 2875/9952 cut-off events. For 60957/61318 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 108647 event pairs, 496 based on Foata normal form. 71/9622 useless extension candidates. Maximal degree in co-relation 37900. Up to 2035 conditions per place. [2021-12-22 13:51:24,101 INFO L132 encePairwiseOnDemand]: 152/179 looper letters, 220 selfloop transitions, 167 changer transitions 6/568 dead transitions. [2021-12-22 13:51:24,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 568 transitions, 6159 flow [2021-12-22 13:51:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 13:51:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-22 13:51:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2466 transitions. [2021-12-22 13:51:24,105 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.598979839689094 [2021-12-22 13:51:24,105 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2466 transitions. [2021-12-22 13:51:24,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2466 transitions. [2021-12-22 13:51:24,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:24,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2466 transitions. [2021-12-22 13:51:24,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.21739130434783) internal successors, (2466), 23 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:24,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:24,111 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:24,111 INFO L186 Difference]: Start difference. First operand has 395 places, 434 transitions, 3901 flow. Second operand 23 states and 2466 transitions. [2021-12-22 13:51:24,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 568 transitions, 6159 flow [2021-12-22 13:51:24,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 568 transitions, 5374 flow, removed 340 selfloop flow, removed 15 redundant places. [2021-12-22 13:51:24,389 INFO L242 Difference]: Finished difference. Result has 408 places, 504 transitions, 4784 flow [2021-12-22 13:51:24,390 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3479, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4784, PETRI_PLACES=408, PETRI_TRANSITIONS=504} [2021-12-22 13:51:24,390 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 248 predicate places. [2021-12-22 13:51:24,390 INFO L470 AbstractCegarLoop]: Abstraction has has 408 places, 504 transitions, 4784 flow [2021-12-22 13:51:24,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:24,391 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:24,391 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] [2021-12-22 13:51:24,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:24,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 13:51:24,608 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1803001111, now seen corresponding path program 9 times [2021-12-22 13:51:24,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708200462] [2021-12-22 13:51:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:24,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:24,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:24,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708200462] [2021-12-22 13:51:24,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708200462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634414477] [2021-12-22 13:51:24,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:51:24,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:24,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:24,829 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:24,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:51:24,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:51:24,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-22 13:51:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:25,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 13:51:25,481 INFO L387 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 14 treesize of output 16 [2021-12-22 13:51:25,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 13:51:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:25,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:25,669 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_322 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_322) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2021-12-22 13:51:25,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 13:51:25,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2021-12-22 13:51:25,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-22 13:51:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:26,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634414477] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:26,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:26,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 32 [2021-12-22 13:51:26,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053465169] [2021-12-22 13:51:26,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:26,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 13:51:26,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 13:51:26,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=810, Unknown=1, NotChecked=58, Total=992 [2021-12-22 13:51:26,090 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2021-12-22 13:51:26,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 504 transitions, 4784 flow. Second operand has 32 states, 32 states have (on average 103.625) internal successors, (3316), 32 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:26,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:26,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2021-12-22 13:51:26,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:28,738 INFO L129 PetriNetUnfolder]: 2926/10345 cut-off events. [2021-12-22 13:51:28,738 INFO L130 PetriNetUnfolder]: For 76961/77630 co-relation queries the response was YES. [2021-12-22 13:51:28,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44506 conditions, 10345 events. 2926/10345 cut-off events. For 76961/77630 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 114774 event pairs, 675 based on Foata normal form. 85/9980 useless extension candidates. Maximal degree in co-relation 44395. Up to 2990 conditions per place. [2021-12-22 13:51:28,883 INFO L132 encePairwiseOnDemand]: 154/179 looper letters, 298 selfloop transitions, 124 changer transitions 4/601 dead transitions. [2021-12-22 13:51:28,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 601 transitions, 6648 flow [2021-12-22 13:51:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 13:51:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-22 13:51:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2451 transitions. [2021-12-22 13:51:28,886 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5953364100072869 [2021-12-22 13:51:28,886 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2451 transitions. [2021-12-22 13:51:28,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2451 transitions. [2021-12-22 13:51:28,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:28,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2451 transitions. [2021-12-22 13:51:28,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 106.56521739130434) internal successors, (2451), 23 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:28,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:28,891 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:28,892 INFO L186 Difference]: Start difference. First operand has 408 places, 504 transitions, 4784 flow. Second operand 23 states and 2451 transitions. [2021-12-22 13:51:28,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 601 transitions, 6648 flow [2021-12-22 13:51:29,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 601 transitions, 6393 flow, removed 84 selfloop flow, removed 12 redundant places. [2021-12-22 13:51:29,190 INFO L242 Difference]: Finished difference. Result has 425 places, 543 transitions, 5470 flow [2021-12-22 13:51:29,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5470, PETRI_PLACES=425, PETRI_TRANSITIONS=543} [2021-12-22 13:51:29,191 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 265 predicate places. [2021-12-22 13:51:29,191 INFO L470 AbstractCegarLoop]: Abstraction has has 425 places, 543 transitions, 5470 flow [2021-12-22 13:51:29,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 103.625) internal successors, (3316), 32 states have internal predecessors, (3316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:29,192 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:29,192 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:29,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:29,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 13:51:29,393 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:29,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:29,393 INFO L85 PathProgramCache]: Analyzing trace with hash 598545018, now seen corresponding path program 2 times [2021-12-22 13:51:29,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:29,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666073376] [2021-12-22 13:51:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:29,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:51:29,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666073376] [2021-12-22 13:51:29,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666073376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:29,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055579061] [2021-12-22 13:51:29,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:51:29,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:29,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:29,532 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:29,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:51:29,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:51:29,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 13:51:29,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:51:29,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:51:30,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055579061] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:30,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:30,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 18 [2021-12-22 13:51:30,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228512021] [2021-12-22 13:51:30,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:30,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:51:30,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:51:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:51:30,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-22 13:51:30,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 543 transitions, 5470 flow. Second operand has 18 states, 18 states have (on average 144.83333333333334) internal successors, (2607), 18 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:30,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:30,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-22 13:51:30,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:32,849 INFO L129 PetriNetUnfolder]: 2298/8925 cut-off events. [2021-12-22 13:51:32,849 INFO L130 PetriNetUnfolder]: For 46817/47176 co-relation queries the response was YES. [2021-12-22 13:51:32,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34710 conditions, 8925 events. 2298/8925 cut-off events. For 46817/47176 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 97791 event pairs, 748 based on Foata normal form. 101/8396 useless extension candidates. Maximal degree in co-relation 34591. Up to 1000 conditions per place. [2021-12-22 13:51:32,966 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 129 selfloop transitions, 62 changer transitions 1/652 dead transitions. [2021-12-22 13:51:32,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 652 transitions, 6659 flow [2021-12-22 13:51:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:51:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-12-22 13:51:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3258 transitions. [2021-12-22 13:51:32,969 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273235144743525 [2021-12-22 13:51:32,969 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3258 transitions. [2021-12-22 13:51:32,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3258 transitions. [2021-12-22 13:51:32,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:32,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3258 transitions. [2021-12-22 13:51:32,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 148.0909090909091) internal successors, (3258), 22 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:32,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:32,974 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:32,975 INFO L186 Difference]: Start difference. First operand has 425 places, 543 transitions, 5470 flow. Second operand 22 states and 3258 transitions. [2021-12-22 13:51:32,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 652 transitions, 6659 flow [2021-12-22 13:51:33,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 652 transitions, 6461 flow, removed 77 selfloop flow, removed 12 redundant places. [2021-12-22 13:51:33,205 INFO L242 Difference]: Finished difference. Result has 440 places, 576 transitions, 5809 flow [2021-12-22 13:51:33,206 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5809, PETRI_PLACES=440, PETRI_TRANSITIONS=576} [2021-12-22 13:51:33,206 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 280 predicate places. [2021-12-22 13:51:33,206 INFO L470 AbstractCegarLoop]: Abstraction has has 440 places, 576 transitions, 5809 flow [2021-12-22 13:51:33,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 144.83333333333334) internal successors, (2607), 18 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:33,207 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:33,207 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:33,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-22 13:51:33,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 13:51:33,419 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1795487122, now seen corresponding path program 3 times [2021-12-22 13:51:33,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:33,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83930423] [2021-12-22 13:51:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:33,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:51:33,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:33,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83930423] [2021-12-22 13:51:33,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83930423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:33,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516442305] [2021-12-22 13:51:33,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:51:33,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:33,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:33,555 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:33,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:51:33,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 13:51:33,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:33,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 13:51:33,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:51:34,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:51:34,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516442305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:34,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:34,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-22 13:51:34,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066803155] [2021-12-22 13:51:34,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:34,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 13:51:34,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 13:51:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:51:34,559 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-22 13:51:34,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 576 transitions, 5809 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:34,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:34,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-22 13:51:34,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:41,967 INFO L129 PetriNetUnfolder]: 4294/17295 cut-off events. [2021-12-22 13:51:41,968 INFO L130 PetriNetUnfolder]: For 103260/103886 co-relation queries the response was YES. [2021-12-22 13:51:42,145 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70431 conditions, 17295 events. 4294/17295 cut-off events. For 103260/103886 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 214447 event pairs, 1176 based on Foata normal form. 154/16239 useless extension candidates. Maximal degree in co-relation 70306. Up to 1781 conditions per place. [2021-12-22 13:51:42,198 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 228 selfloop transitions, 273 changer transitions 0/961 dead transitions. [2021-12-22 13:51:42,199 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 961 transitions, 9919 flow [2021-12-22 13:51:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-22 13:51:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-12-22 13:51:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 10366 transitions. [2021-12-22 13:51:42,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8272944932162809 [2021-12-22 13:51:42,205 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 10366 transitions. [2021-12-22 13:51:42,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 10366 transitions. [2021-12-22 13:51:42,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:42,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 10366 transitions. [2021-12-22 13:51:42,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 148.0857142857143) internal successors, (10366), 70 states have internal predecessors, (10366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:42,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 179.0) internal successors, (12709), 71 states have internal predecessors, (12709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:42,227 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 179.0) internal successors, (12709), 71 states have internal predecessors, (12709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:42,227 INFO L186 Difference]: Start difference. First operand has 440 places, 576 transitions, 5809 flow. Second operand 70 states and 10366 transitions. [2021-12-22 13:51:42,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 961 transitions, 9919 flow [2021-12-22 13:51:42,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 961 transitions, 9617 flow, removed 124 selfloop flow, removed 2 redundant places. [2021-12-22 13:51:42,873 INFO L242 Difference]: Finished difference. Result has 533 places, 806 transitions, 8672 flow [2021-12-22 13:51:42,874 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=8672, PETRI_PLACES=533, PETRI_TRANSITIONS=806} [2021-12-22 13:51:42,875 INFO L334 CegarLoopForPetriNet]: 160 programPoint places, 373 predicate places. [2021-12-22 13:51:42,875 INFO L470 AbstractCegarLoop]: Abstraction has has 533 places, 806 transitions, 8672 flow [2021-12-22 13:51:42,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:42,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:42,875 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:42,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:43,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:43,082 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-22 13:51:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:43,082 INFO L85 PathProgramCache]: Analyzing trace with hash -474649438, now seen corresponding path program 4 times [2021-12-22 13:51:43,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:43,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327555048] [2021-12-22 13:51:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:43,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:51:43,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:43,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327555048] [2021-12-22 13:51:43,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327555048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:43,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9548280] [2021-12-22 13:51:43,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 13:51:43,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:43,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:43,221 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:43,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:51:43,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 13:51:43,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:51:43,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 13:51:43,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:51:43,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:51:44,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9548280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:44,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:44,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-22 13:51:44,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516894026] [2021-12-22 13:51:44,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:44,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 13:51:44,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:44,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 13:51:44,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-12-22 13:51:44,314 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2021-12-22 13:51:44,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 806 transitions, 8672 flow. Second operand has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:44,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:44,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2021-12-22 13:51:44,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand