./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-3.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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:09:28,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:09:28,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:09:29,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:09:29,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:09:29,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:09:29,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:09:29,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:09:29,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:09:29,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:09:29,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:09:29,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:09:29,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:09:29,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:09:29,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:09:29,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:09:29,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:09:29,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:09:29,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:09:29,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:09:29,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:09:29,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:09:29,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:09:29,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:09:29,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:09:29,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:09:29,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:09:29,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:09:29,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:09:29,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:09:29,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:09:29,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:09:29,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:09:29,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:09:29,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:09:29,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:09:29,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:09:29,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:09:29,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:09:29,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:09:29,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:09:29,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:09:29,088 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:09:29,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:09:29,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:09:29,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:09:29,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:09:29,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:09:29,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:09:29,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:09:29,090 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:09:29,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:09:29,091 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:09:29,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:09:29,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:09:29,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:09:29,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:09:29,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:09:29,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:09:29,092 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:09:29,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:09:29,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:09:29,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:09:29,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:09:29,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:09:29,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:09:29,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:09:29,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:09:29,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:09:29,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:09:29,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:09:29,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:09:29,095 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:09:29,095 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:09:29,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:09:29,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:09:29,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2021-12-17 23:09:29,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:09:29,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:09:29,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:09:29,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:09:29,328 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:09:29,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2021-12-17 23:09:29,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c34bc489/a9b2074d669b4225bee8b95fea24bb43/FLAG3cb1c2e4d [2021-12-17 23:09:29,704 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:09:29,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2021-12-17 23:09:29,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c34bc489/a9b2074d669b4225bee8b95fea24bb43/FLAG3cb1c2e4d [2021-12-17 23:09:30,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c34bc489/a9b2074d669b4225bee8b95fea24bb43 [2021-12-17 23:09:30,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:09:30,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:09:30,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:09:30,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:09:30,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:09:30,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ac9697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30, skipping insertion in model container [2021-12-17 23:09:30,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:09:30,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:09:30,290 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2021-12-17 23:09:30,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:09:30,303 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:09:30,328 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2021-12-17 23:09:30,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:09:30,343 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:09:30,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30 WrapperNode [2021-12-17 23:09:30,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:09:30,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:09:30,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:09:30,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:09:30,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,374 INFO L137 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 245 [2021-12-17 23:09:30,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:09:30,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:09:30,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:09:30,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:09:30,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:09:30,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:09:30,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:09:30,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:09:30,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (1/1) ... [2021-12-17 23:09:30,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:09:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:30,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 23:09:30,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 23:09:30,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:09:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:09:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:09:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:09:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:09:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:09:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:09:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:09:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-17 23:09:30,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-17 23:09:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:09:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 23:09:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 23:09:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 23:09:30,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:09:30,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:09:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:09:30,503 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 23:09:30,581 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:09:30,582 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:09:30,901 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:09:30,970 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:09:30,972 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-17 23:09:30,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:09:30 BoogieIcfgContainer [2021-12-17 23:09:30,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:09:30,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:09:30,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:09:30,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:09:30,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:09:30" (1/3) ... [2021-12-17 23:09:30,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a63b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:09:30, skipping insertion in model container [2021-12-17 23:09:30,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:09:30" (2/3) ... [2021-12-17 23:09:30,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a63b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:09:30, skipping insertion in model container [2021-12-17 23:09:30,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:09:30" (3/3) ... [2021-12-17 23:09:30,982 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2021-12-17 23:09:30,989 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:09:30,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:09:30,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:09:30,989 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:09:31,033 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,034 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,034 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,035 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,035 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,035 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,035 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,037 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,037 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,037 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,038 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,038 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,038 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,039 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,039 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,039 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,040 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,041 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,042 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,044 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,044 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,044 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,044 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,045 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,046 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,047 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,047 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,048 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,048 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,048 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,048 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,048 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,049 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,050 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,050 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,050 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,051 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,051 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,051 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,051 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,051 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,052 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,052 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,052 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,052 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,052 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,053 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,053 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,053 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,053 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,053 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,053 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,053 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,058 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,058 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,059 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,063 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,063 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,063 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,063 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,063 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,063 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,064 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,065 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,065 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,065 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,065 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,065 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,065 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,067 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,068 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:09:31,072 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-17 23:09:31,125 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:09:31,130 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 23:09:31,130 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-17 23:09:31,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 446 flow [2021-12-17 23:09:31,198 INFO L129 PetriNetUnfolder]: 18/208 cut-off events. [2021-12-17 23:09:31,198 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:09:31,202 INFO L84 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 18/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 111 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 170. Up to 3 conditions per place. [2021-12-17 23:09:31,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 211 transitions, 446 flow [2021-12-17 23:09:31,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 197 transitions, 412 flow [2021-12-17 23:09:31,237 INFO L129 PetriNetUnfolder]: 18/196 cut-off events. [2021-12-17 23:09:31,238 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:09:31,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:31,239 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:31,239 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash -282035707, now seen corresponding path program 1 times [2021-12-17 23:09:31,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:31,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442469794] [2021-12-17 23:09:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:31,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:31,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:31,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442469794] [2021-12-17 23:09:31,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442469794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:09:31,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:09:31,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 23:09:31,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357969359] [2021-12-17 23:09:31,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:09:31,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 23:09:31,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 23:09:31,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 23:09:31,503 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 211 [2021-12-17 23:09:31,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 197 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:31,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:31,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 211 [2021-12-17 23:09:31,510 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:31,630 INFO L129 PetriNetUnfolder]: 71/370 cut-off events. [2021-12-17 23:09:31,631 INFO L130 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2021-12-17 23:09:31,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 370 events. 71/370 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1046 event pairs, 38 based on Foata normal form. 60/393 useless extension candidates. Maximal degree in co-relation 331. Up to 106 conditions per place. [2021-12-17 23:09:31,637 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 11 selfloop transitions, 0 changer transitions 6/184 dead transitions. [2021-12-17 23:09:31,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 184 transitions, 408 flow [2021-12-17 23:09:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 23:09:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 23:09:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 396 transitions. [2021-12-17 23:09:31,655 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9383886255924171 [2021-12-17 23:09:31,655 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 396 transitions. [2021-12-17 23:09:31,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 396 transitions. [2021-12-17 23:09:31,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:31,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 396 transitions. [2021-12-17 23:09:31,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 198.0) internal successors, (396), 2 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:31,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:31,673 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:31,675 INFO L186 Difference]: Start difference. First operand has 189 places, 197 transitions, 412 flow. Second operand 2 states and 396 transitions. [2021-12-17 23:09:31,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 184 transitions, 408 flow [2021-12-17 23:09:31,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 184 transitions, 396 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-17 23:09:31,684 INFO L242 Difference]: Finished difference. Result has 184 places, 178 transitions, 362 flow [2021-12-17 23:09:31,686 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=362, PETRI_PLACES=184, PETRI_TRANSITIONS=178} [2021-12-17 23:09:31,689 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, -5 predicate places. [2021-12-17 23:09:31,689 INFO L470 AbstractCegarLoop]: Abstraction has has 184 places, 178 transitions, 362 flow [2021-12-17 23:09:31,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 192.0) internal successors, (384), 2 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:31,690 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:31,690 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:31,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:09:31,691 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1730877595, now seen corresponding path program 1 times [2021-12-17 23:09:31,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:31,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794941330] [2021-12-17 23:09:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:31,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:31,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794941330] [2021-12-17 23:09:31,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794941330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:09:31,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:09:31,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:09:31,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111171188] [2021-12-17 23:09:31,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:09:31,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:09:31,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:09:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:09:31,950 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2021-12-17 23:09:31,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 178 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:31,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:31,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2021-12-17 23:09:31,952 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:32,131 INFO L129 PetriNetUnfolder]: 73/448 cut-off events. [2021-12-17 23:09:32,131 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-12-17 23:09:32,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 448 events. 73/448 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1281 event pairs, 38 based on Foata normal form. 11/424 useless extension candidates. Maximal degree in co-relation 616. Up to 118 conditions per place. [2021-12-17 23:09:32,134 INFO L132 encePairwiseOnDemand]: 199/211 looper letters, 33 selfloop transitions, 8 changer transitions 17/199 dead transitions. [2021-12-17 23:09:32,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 199 transitions, 523 flow [2021-12-17 23:09:32,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 23:09:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-17 23:09:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1501 transitions. [2021-12-17 23:09:32,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7904160084254871 [2021-12-17 23:09:32,138 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1501 transitions. [2021-12-17 23:09:32,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1501 transitions. [2021-12-17 23:09:32,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:32,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1501 transitions. [2021-12-17 23:09:32,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,146 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 211.0) internal successors, (2110), 10 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,146 INFO L186 Difference]: Start difference. First operand has 184 places, 178 transitions, 362 flow. Second operand 9 states and 1501 transitions. [2021-12-17 23:09:32,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 199 transitions, 523 flow [2021-12-17 23:09:32,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 199 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:09:32,152 INFO L242 Difference]: Finished difference. Result has 188 places, 179 transitions, 394 flow [2021-12-17 23:09:32,153 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=188, PETRI_TRANSITIONS=179} [2021-12-17 23:09:32,153 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2021-12-17 23:09:32,154 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 179 transitions, 394 flow [2021-12-17 23:09:32,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 164.66666666666666) internal successors, (988), 6 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,154 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:32,155 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:32,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:09:32,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:32,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1242264401, now seen corresponding path program 1 times [2021-12-17 23:09:32,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:32,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162050145] [2021-12-17 23:09:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:32,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:09:32,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:32,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162050145] [2021-12-17 23:09:32,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162050145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:09:32,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:09:32,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:09:32,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246205928] [2021-12-17 23:09:32,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:09:32,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:09:32,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:09:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:09:32,326 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 211 [2021-12-17 23:09:32,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 179 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:32,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 211 [2021-12-17 23:09:32,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:32,464 INFO L129 PetriNetUnfolder]: 92/476 cut-off events. [2021-12-17 23:09:32,464 INFO L130 PetriNetUnfolder]: For 83/95 co-relation queries the response was YES. [2021-12-17 23:09:32,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 476 events. 92/476 cut-off events. For 83/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1572 event pairs, 50 based on Foata normal form. 15/449 useless extension candidates. Maximal degree in co-relation 772. Up to 115 conditions per place. [2021-12-17 23:09:32,467 INFO L132 encePairwiseOnDemand]: 202/211 looper letters, 36 selfloop transitions, 6 changer transitions 8/191 dead transitions. [2021-12-17 23:09:32,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 191 transitions, 528 flow [2021-12-17 23:09:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:09:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:09:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1171 transitions. [2021-12-17 23:09:32,471 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7928232904536222 [2021-12-17 23:09:32,471 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1171 transitions. [2021-12-17 23:09:32,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1171 transitions. [2021-12-17 23:09:32,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:32,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1171 transitions. [2021-12-17 23:09:32,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.28571428571428) internal successors, (1171), 7 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,478 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 211.0) internal successors, (1688), 8 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,478 INFO L186 Difference]: Start difference. First operand has 188 places, 179 transitions, 394 flow. Second operand 7 states and 1171 transitions. [2021-12-17 23:09:32,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 191 transitions, 528 flow [2021-12-17 23:09:32,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 514 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-17 23:09:32,485 INFO L242 Difference]: Finished difference. Result has 189 places, 180 transitions, 404 flow [2021-12-17 23:09:32,486 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2021-12-17 23:09:32,487 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 0 predicate places. [2021-12-17 23:09:32,487 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 404 flow [2021-12-17 23:09:32,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 165.33333333333334) internal successors, (992), 6 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:32,488 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:32,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 23:09:32,489 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:32,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2135340436, now seen corresponding path program 1 times [2021-12-17 23:09:32,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:32,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710044869] [2021-12-17 23:09:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:32,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:09:32,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:32,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710044869] [2021-12-17 23:09:32,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710044869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:09:32,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:09:32,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 23:09:32,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735120019] [2021-12-17 23:09:32,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:09:32,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 23:09:32,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 23:09:32,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:09:32,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2021-12-17 23:09:32,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:32,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2021-12-17 23:09:32,646 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:32,706 INFO L129 PetriNetUnfolder]: 82/405 cut-off events. [2021-12-17 23:09:32,706 INFO L130 PetriNetUnfolder]: For 84/88 co-relation queries the response was YES. [2021-12-17 23:09:32,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 405 events. 82/405 cut-off events. For 84/88 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1130 event pairs, 23 based on Foata normal form. 8/388 useless extension candidates. Maximal degree in co-relation 644. Up to 82 conditions per place. [2021-12-17 23:09:32,711 INFO L132 encePairwiseOnDemand]: 208/211 looper letters, 19 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2021-12-17 23:09:32,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 186 transitions, 468 flow [2021-12-17 23:09:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 23:09:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 23:09:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 568 transitions. [2021-12-17 23:09:32,713 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8973143759873617 [2021-12-17 23:09:32,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 568 transitions. [2021-12-17 23:09:32,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 568 transitions. [2021-12-17 23:09:32,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:32,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 568 transitions. [2021-12-17 23:09:32,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,718 INFO L186 Difference]: Start difference. First operand has 189 places, 180 transitions, 404 flow. Second operand 3 states and 568 transitions. [2021-12-17 23:09:32,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 186 transitions, 468 flow [2021-12-17 23:09:32,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 186 transitions, 458 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 23:09:32,722 INFO L242 Difference]: Finished difference. Result has 187 places, 181 transitions, 408 flow [2021-12-17 23:09:32,722 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=408, PETRI_PLACES=187, PETRI_TRANSITIONS=181} [2021-12-17 23:09:32,723 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, -2 predicate places. [2021-12-17 23:09:32,723 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 181 transitions, 408 flow [2021-12-17 23:09:32,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,723 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:32,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:32,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:09:32,724 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:32,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1829459480, now seen corresponding path program 2 times [2021-12-17 23:09:32,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:32,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171378507] [2021-12-17 23:09:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:32,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:09:32,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171378507] [2021-12-17 23:09:32,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171378507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:09:32,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:09:32,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 23:09:32,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109466944] [2021-12-17 23:09:32,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:09:32,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 23:09:32,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 23:09:32,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 23:09:32,810 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2021-12-17 23:09:32,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 181 transitions, 408 flow. Second operand has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:32,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2021-12-17 23:09:32,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:32,855 INFO L129 PetriNetUnfolder]: 58/347 cut-off events. [2021-12-17 23:09:32,855 INFO L130 PetriNetUnfolder]: For 88/96 co-relation queries the response was YES. [2021-12-17 23:09:32,856 INFO L84 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 347 events. 58/347 cut-off events. For 88/96 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 810 event pairs, 9 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 564. Up to 91 conditions per place. [2021-12-17 23:09:32,857 INFO L132 encePairwiseOnDemand]: 207/211 looper letters, 17 selfloop transitions, 3 changer transitions 0/185 dead transitions. [2021-12-17 23:09:32,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 185 transitions, 462 flow [2021-12-17 23:09:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 23:09:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 23:09:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2021-12-17 23:09:32,859 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8941548183254344 [2021-12-17 23:09:32,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2021-12-17 23:09:32,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2021-12-17 23:09:32,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:32,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2021-12-17 23:09:32,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,862 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,862 INFO L186 Difference]: Start difference. First operand has 187 places, 181 transitions, 408 flow. Second operand 3 states and 566 transitions. [2021-12-17 23:09:32,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 185 transitions, 462 flow [2021-12-17 23:09:32,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 185 transitions, 454 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-12-17 23:09:32,866 INFO L242 Difference]: Finished difference. Result has 188 places, 183 transitions, 423 flow [2021-12-17 23:09:32,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=423, PETRI_PLACES=188, PETRI_TRANSITIONS=183} [2021-12-17 23:09:32,867 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, -1 predicate places. [2021-12-17 23:09:32,867 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 183 transitions, 423 flow [2021-12-17 23:09:32,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:32,868 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:32,868 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:32,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:09:32,868 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash -823366548, now seen corresponding path program 3 times [2021-12-17 23:09:32,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:32,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774830794] [2021-12-17 23:09:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:32,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:09:33,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:33,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774830794] [2021-12-17 23:09:33,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774830794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:09:33,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:09:33,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 23:09:33,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006516289] [2021-12-17 23:09:33,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:09:33,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 23:09:33,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:33,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 23:09:33,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:09:33,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 211 [2021-12-17 23:09:33,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 183 transitions, 423 flow. Second operand has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:33,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:33,068 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 211 [2021-12-17 23:09:33,068 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:33,319 INFO L129 PetriNetUnfolder]: 426/1115 cut-off events. [2021-12-17 23:09:33,320 INFO L130 PetriNetUnfolder]: For 591/603 co-relation queries the response was YES. [2021-12-17 23:09:33,323 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2378 conditions, 1115 events. 426/1115 cut-off events. For 591/603 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6122 event pairs, 103 based on Foata normal form. 1/1036 useless extension candidates. Maximal degree in co-relation 2369. Up to 291 conditions per place. [2021-12-17 23:09:33,327 INFO L132 encePairwiseOnDemand]: 196/211 looper letters, 77 selfloop transitions, 13 changer transitions 9/232 dead transitions. [2021-12-17 23:09:33,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 232 transitions, 782 flow [2021-12-17 23:09:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 23:09:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 23:09:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1969 transitions. [2021-12-17 23:09:33,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7178271965001822 [2021-12-17 23:09:33,331 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1969 transitions. [2021-12-17 23:09:33,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1969 transitions. [2021-12-17 23:09:33,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:33,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1969 transitions. [2021-12-17 23:09:33,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 151.46153846153845) internal successors, (1969), 13 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:33,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:33,353 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:33,353 INFO L186 Difference]: Start difference. First operand has 188 places, 183 transitions, 423 flow. Second operand 13 states and 1969 transitions. [2021-12-17 23:09:33,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 232 transitions, 782 flow [2021-12-17 23:09:33,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 232 transitions, 775 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-12-17 23:09:33,358 INFO L242 Difference]: Finished difference. Result has 204 places, 189 transitions, 478 flow [2021-12-17 23:09:33,358 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=478, PETRI_PLACES=204, PETRI_TRANSITIONS=189} [2021-12-17 23:09:33,358 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 15 predicate places. [2021-12-17 23:09:33,359 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 189 transitions, 478 flow [2021-12-17 23:09:33,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.5) internal successors, (1770), 12 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:33,359 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:33,360 INFO L254 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:33,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 23:09:33,360 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1543310046, now seen corresponding path program 1 times [2021-12-17 23:09:33,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:33,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111165841] [2021-12-17 23:09:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:33,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:09:33,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:33,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111165841] [2021-12-17 23:09:33,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111165841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:09:33,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835464120] [2021-12-17 23:09:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:33,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:33,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:33,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:09:33,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:09:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 23:09:33,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:09:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 23:09:34,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:09:34,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835464120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:09:34,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:09:34,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-12-17 23:09:34,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378686536] [2021-12-17 23:09:34,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:09:34,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:09:34,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:34,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:09:34,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-17 23:09:34,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2021-12-17 23:09:34,066 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 189 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:34,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:34,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2021-12-17 23:09:34,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:34,212 INFO L129 PetriNetUnfolder]: 190/840 cut-off events. [2021-12-17 23:09:34,213 INFO L130 PetriNetUnfolder]: For 523/565 co-relation queries the response was YES. [2021-12-17 23:09:34,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 840 events. 190/840 cut-off events. For 523/565 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4620 event pairs, 41 based on Foata normal form. 21/819 useless extension candidates. Maximal degree in co-relation 1688. Up to 132 conditions per place. [2021-12-17 23:09:34,219 INFO L132 encePairwiseOnDemand]: 208/211 looper letters, 31 selfloop transitions, 6 changer transitions 0/207 dead transitions. [2021-12-17 23:09:34,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 207 transitions, 633 flow [2021-12-17 23:09:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 23:09:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 23:09:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2021-12-17 23:09:34,221 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9016587677725119 [2021-12-17 23:09:34,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2021-12-17 23:09:34,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2021-12-17 23:09:34,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:34,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2021-12-17 23:09:34,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:34,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:34,224 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:34,224 INFO L186 Difference]: Start difference. First operand has 204 places, 189 transitions, 478 flow. Second operand 4 states and 761 transitions. [2021-12-17 23:09:34,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 207 transitions, 633 flow [2021-12-17 23:09:34,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 207 transitions, 617 flow, removed 3 selfloop flow, removed 7 redundant places. [2021-12-17 23:09:34,229 INFO L242 Difference]: Finished difference. Result has 199 places, 193 transitions, 515 flow [2021-12-17 23:09:34,229 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=515, PETRI_PLACES=199, PETRI_TRANSITIONS=193} [2021-12-17 23:09:34,230 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 10 predicate places. [2021-12-17 23:09:34,230 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 193 transitions, 515 flow [2021-12-17 23:09:34,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:34,230 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:34,231 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:34,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:09:34,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:34,453 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:34,453 INFO L85 PathProgramCache]: Analyzing trace with hash -481635733, now seen corresponding path program 1 times [2021-12-17 23:09:34,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:34,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025986329] [2021-12-17 23:09:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:34,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:09:34,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:34,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025986329] [2021-12-17 23:09:34,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025986329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:09:34,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226590841] [2021-12-17 23:09:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:34,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:34,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:34,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:09:34,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:09:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 23:09:34,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:09:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:09:34,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:09:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:09:35,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226590841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:09:35,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:09:35,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-17 23:09:35,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509807140] [2021-12-17 23:09:35,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:09:35,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:09:35,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:35,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:09:35,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:09:35,215 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2021-12-17 23:09:35,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 193 transitions, 515 flow. Second operand has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:35,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:35,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2021-12-17 23:09:35,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:35,590 INFO L129 PetriNetUnfolder]: 288/1445 cut-off events. [2021-12-17 23:09:35,590 INFO L130 PetriNetUnfolder]: For 1610/1694 co-relation queries the response was YES. [2021-12-17 23:09:35,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3194 conditions, 1445 events. 288/1445 cut-off events. For 1610/1694 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9741 event pairs, 159 based on Foata normal form. 68/1444 useless extension candidates. Maximal degree in co-relation 3180. Up to 323 conditions per place. [2021-12-17 23:09:35,599 INFO L132 encePairwiseOnDemand]: 195/211 looper letters, 69 selfloop transitions, 23 changer transitions 1/235 dead transitions. [2021-12-17 23:09:35,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 235 transitions, 868 flow [2021-12-17 23:09:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 23:09:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-17 23:09:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2731 transitions. [2021-12-17 23:09:35,604 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7613604683579593 [2021-12-17 23:09:35,604 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2731 transitions. [2021-12-17 23:09:35,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2731 transitions. [2021-12-17 23:09:35,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:35,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2731 transitions. [2021-12-17 23:09:35,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 160.64705882352942) internal successors, (2731), 17 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:35,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:35,616 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 211.0) internal successors, (3798), 18 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:35,616 INFO L186 Difference]: Start difference. First operand has 199 places, 193 transitions, 515 flow. Second operand 17 states and 2731 transitions. [2021-12-17 23:09:35,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 235 transitions, 868 flow [2021-12-17 23:09:35,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 235 transitions, 856 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-12-17 23:09:35,625 INFO L242 Difference]: Finished difference. Result has 221 places, 204 transitions, 622 flow [2021-12-17 23:09:35,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=622, PETRI_PLACES=221, PETRI_TRANSITIONS=204} [2021-12-17 23:09:35,628 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 32 predicate places. [2021-12-17 23:09:35,628 INFO L470 AbstractCegarLoop]: Abstraction has has 221 places, 204 transitions, 622 flow [2021-12-17 23:09:35,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.42105263157896) internal successors, (3029), 19 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:35,629 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:35,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:35,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 23:09:35,843 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,SelfDestructingSolverStorable7 [2021-12-17 23:09:35,844 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:35,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1860417507, now seen corresponding path program 1 times [2021-12-17 23:09:35,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:35,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915487573] [2021-12-17 23:09:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:35,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 23:09:35,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915487573] [2021-12-17 23:09:35,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915487573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:09:35,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778705118] [2021-12-17 23:09:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:35,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:35,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:35,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:09:35,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:09:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 23:09:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:09:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 23:09:36,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:09:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 23:09:36,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778705118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:09:36,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:09:36,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-17 23:09:36,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88027236] [2021-12-17 23:09:36,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:09:36,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:09:36,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:36,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:09:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-17 23:09:36,698 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 211 [2021-12-17 23:09:36,700 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 204 transitions, 622 flow. Second operand has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:36,700 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:36,700 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 211 [2021-12-17 23:09:36,700 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:37,081 INFO L129 PetriNetUnfolder]: 329/1728 cut-off events. [2021-12-17 23:09:37,081 INFO L130 PetriNetUnfolder]: For 1727/1812 co-relation queries the response was YES. [2021-12-17 23:09:37,086 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3810 conditions, 1728 events. 329/1728 cut-off events. For 1727/1812 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12453 event pairs, 183 based on Foata normal form. 37/1680 useless extension candidates. Maximal degree in co-relation 3789. Up to 439 conditions per place. [2021-12-17 23:09:37,090 INFO L132 encePairwiseOnDemand]: 198/211 looper letters, 68 selfloop transitions, 23 changer transitions 2/235 dead transitions. [2021-12-17 23:09:37,090 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 235 transitions, 957 flow [2021-12-17 23:09:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 23:09:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-12-17 23:09:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2096 transitions. [2021-12-17 23:09:37,094 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7641268683922713 [2021-12-17 23:09:37,094 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2096 transitions. [2021-12-17 23:09:37,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2096 transitions. [2021-12-17 23:09:37,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:37,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2096 transitions. [2021-12-17 23:09:37,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 161.23076923076923) internal successors, (2096), 13 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:37,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:37,111 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 211.0) internal successors, (2954), 14 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:37,111 INFO L186 Difference]: Start difference. First operand has 221 places, 204 transitions, 622 flow. Second operand 13 states and 2096 transitions. [2021-12-17 23:09:37,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 235 transitions, 957 flow [2021-12-17 23:09:37,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 235 transitions, 931 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-12-17 23:09:37,116 INFO L242 Difference]: Finished difference. Result has 235 places, 212 transitions, 725 flow [2021-12-17 23:09:37,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=725, PETRI_PLACES=235, PETRI_TRANSITIONS=212} [2021-12-17 23:09:37,117 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 46 predicate places. [2021-12-17 23:09:37,117 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 212 transitions, 725 flow [2021-12-17 23:09:37,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.57894736842104) internal successors, (3032), 19 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:37,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:37,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:37,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 23:09:37,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:37,335 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:37,336 INFO L85 PathProgramCache]: Analyzing trace with hash -106527937, now seen corresponding path program 2 times [2021-12-17 23:09:37,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:37,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975978486] [2021-12-17 23:09:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:37,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:09:37,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:37,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975978486] [2021-12-17 23:09:37,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975978486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:09:37,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809271144] [2021-12-17 23:09:37,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:09:37,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:37,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:37,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:09:37,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:09:37,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:09:37,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:09:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 23:09:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:09:39,114 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-17 23:09:39,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-12-17 23:09:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:09:39,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:09:39,314 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-17 23:09:39,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2021-12-17 23:09:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:09:40,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809271144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:09:40,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:09:40,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 42 [2021-12-17 23:09:40,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775942958] [2021-12-17 23:09:40,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:09:40,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 23:09:40,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 23:09:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1447, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 23:09:40,361 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 211 [2021-12-17 23:09:40,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 212 transitions, 725 flow. Second operand has 42 states, 42 states have (on average 132.5) internal successors, (5565), 42 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:40,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:40,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 211 [2021-12-17 23:09:40,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:46,550 INFO L129 PetriNetUnfolder]: 10182/27400 cut-off events. [2021-12-17 23:09:46,550 INFO L130 PetriNetUnfolder]: For 38477/40694 co-relation queries the response was YES. [2021-12-17 23:09:46,653 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68668 conditions, 27400 events. 10182/27400 cut-off events. For 38477/40694 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 304575 event pairs, 854 based on Foata normal form. 110/26812 useless extension candidates. Maximal degree in co-relation 68641. Up to 5487 conditions per place. [2021-12-17 23:09:46,738 INFO L132 encePairwiseOnDemand]: 179/211 looper letters, 383 selfloop transitions, 122 changer transitions 9/628 dead transitions. [2021-12-17 23:09:46,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 628 transitions, 3887 flow [2021-12-17 23:09:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-17 23:09:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-17 23:09:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 8094 transitions. [2021-12-17 23:09:46,751 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6393364928909953 [2021-12-17 23:09:46,751 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 8094 transitions. [2021-12-17 23:09:46,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 8094 transitions. [2021-12-17 23:09:46,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:46,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 8094 transitions. [2021-12-17 23:09:46,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 134.9) internal successors, (8094), 60 states have internal predecessors, (8094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:46,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 211.0) internal successors, (12871), 61 states have internal predecessors, (12871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:46,779 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 211.0) internal successors, (12871), 61 states have internal predecessors, (12871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:46,779 INFO L186 Difference]: Start difference. First operand has 235 places, 212 transitions, 725 flow. Second operand 60 states and 8094 transitions. [2021-12-17 23:09:46,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 628 transitions, 3887 flow [2021-12-17 23:09:46,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 628 transitions, 3838 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-12-17 23:09:46,801 INFO L242 Difference]: Finished difference. Result has 312 places, 339 transitions, 1753 flow [2021-12-17 23:09:46,802 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=1753, PETRI_PLACES=312, PETRI_TRANSITIONS=339} [2021-12-17 23:09:46,802 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 123 predicate places. [2021-12-17 23:09:46,802 INFO L470 AbstractCegarLoop]: Abstraction has has 312 places, 339 transitions, 1753 flow [2021-12-17 23:09:46,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 132.5) internal successors, (5565), 42 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:46,803 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:46,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:46,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 23:09:47,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:47,022 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:47,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash 378838747, now seen corresponding path program 3 times [2021-12-17 23:09:47,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:47,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275677379] [2021-12-17 23:09:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:47,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:09:47,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:47,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275677379] [2021-12-17 23:09:47,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275677379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:09:47,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752873379] [2021-12-17 23:09:47,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:09:47,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:47,632 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) [2021-12-17 23:09:47,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:09:47,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:09:47,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:09:47,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 23:09:47,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:09:47,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 23:09:47,906 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 23:09:47,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-17 23:09:48,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:09:48,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-17 23:09:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 23:09:48,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:09:48,449 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_320 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_320) c_~q1~0.base) (+ c_~q1~0.offset (* c_~q1_front~0 4)))))) is different from false [2021-12-17 23:09:48,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:09:48,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2021-12-17 23:09:48,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-17 23:09:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 1 not checked. [2021-12-17 23:09:49,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752873379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:09:49,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:09:49,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 34 [2021-12-17 23:09:49,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640307273] [2021-12-17 23:09:49,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:09:49,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 23:09:49,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 23:09:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=970, Unknown=1, NotChecked=62, Total=1122 [2021-12-17 23:09:49,114 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 211 [2021-12-17 23:09:49,117 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 339 transitions, 1753 flow. Second operand has 34 states, 34 states have (on average 122.5) internal successors, (4165), 34 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:49,117 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:49,117 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 211 [2021-12-17 23:09:49,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:09:56,122 INFO L129 PetriNetUnfolder]: 11954/31052 cut-off events. [2021-12-17 23:09:56,123 INFO L130 PetriNetUnfolder]: For 129344/132294 co-relation queries the response was YES. [2021-12-17 23:09:56,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100937 conditions, 31052 events. 11954/31052 cut-off events. For 129344/132294 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 350213 event pairs, 4338 based on Foata normal form. 587/30706 useless extension candidates. Maximal degree in co-relation 100887. Up to 10316 conditions per place. [2021-12-17 23:09:56,475 INFO L132 encePairwiseOnDemand]: 176/211 looper letters, 325 selfloop transitions, 117 changer transitions 0/550 dead transitions. [2021-12-17 23:09:56,476 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 550 transitions, 4068 flow [2021-12-17 23:09:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-17 23:09:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-12-17 23:09:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 6463 transitions. [2021-12-17 23:09:56,481 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5779307878029152 [2021-12-17 23:09:56,481 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 6463 transitions. [2021-12-17 23:09:56,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 6463 transitions. [2021-12-17 23:09:56,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:09:56,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 6463 transitions. [2021-12-17 23:09:56,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 121.94339622641509) internal successors, (6463), 53 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:56,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:56,499 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 211.0) internal successors, (11394), 54 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:56,499 INFO L186 Difference]: Start difference. First operand has 312 places, 339 transitions, 1753 flow. Second operand 53 states and 6463 transitions. [2021-12-17 23:09:56,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 550 transitions, 4068 flow [2021-12-17 23:09:57,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 550 transitions, 3326 flow, removed 348 selfloop flow, removed 16 redundant places. [2021-12-17 23:09:57,204 INFO L242 Difference]: Finished difference. Result has 353 places, 382 transitions, 2005 flow [2021-12-17 23:09:57,205 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=2005, PETRI_PLACES=353, PETRI_TRANSITIONS=382} [2021-12-17 23:09:57,205 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 164 predicate places. [2021-12-17 23:09:57,205 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 382 transitions, 2005 flow [2021-12-17 23:09:57,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 122.5) internal successors, (4165), 34 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:57,227 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:57,228 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:57,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 23:09:57,428 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,SelfDestructingSolverStorable10 [2021-12-17 23:09:57,429 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash -489038853, now seen corresponding path program 4 times [2021-12-17 23:09:57,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:57,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765065217] [2021-12-17 23:09:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:57,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:58,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765065217] [2021-12-17 23:09:58,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765065217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:09:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673271266] [2021-12-17 23:09:58,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 23:09:58,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:58,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:58,578 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) [2021-12-17 23:09:58,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:09:58,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 23:09:58,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:09:58,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 23:09:58,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:10:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:10:00,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-17 23:10:00,234 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-17 23:10:00,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-12-17 23:10:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:10:00,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:10:00,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 23:10:00,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2021-12-17 23:10:00,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-17 23:10:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:10:02,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673271266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:10:02,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:10:02,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 21] total 62 [2021-12-17 23:10:02,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405307755] [2021-12-17 23:10:02,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:10:02,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-17 23:10:02,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:10:02,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-17 23:10:02,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3449, Unknown=2, NotChecked=0, Total=3782 [2021-12-17 23:10:02,314 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 211 [2021-12-17 23:10:02,322 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 382 transitions, 2005 flow. Second operand has 62 states, 62 states have (on average 100.0) internal successors, (6200), 62 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:02,322 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:10:02,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 211 [2021-12-17 23:10:02,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:10:19,576 INFO L129 PetriNetUnfolder]: 16340/45182 cut-off events. [2021-12-17 23:10:19,576 INFO L130 PetriNetUnfolder]: For 223070/226991 co-relation queries the response was YES. [2021-12-17 23:10:20,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145024 conditions, 45182 events. 16340/45182 cut-off events. For 223070/226991 co-relation queries the response was YES. Maximal size of possible extension queue 1399. Compared 562761 event pairs, 2535 based on Foata normal form. 3289/48033 useless extension candidates. Maximal degree in co-relation 144971. Up to 5707 conditions per place. [2021-12-17 23:10:20,364 INFO L132 encePairwiseOnDemand]: 163/211 looper letters, 568 selfloop transitions, 274 changer transitions 29/961 dead transitions. [2021-12-17 23:10:20,364 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 961 transitions, 7400 flow [2021-12-17 23:10:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-17 23:10:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-12-17 23:10:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 10983 transitions. [2021-12-17 23:10:20,377 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4819641916798315 [2021-12-17 23:10:20,378 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 10983 transitions. [2021-12-17 23:10:20,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 10983 transitions. [2021-12-17 23:10:20,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:10:20,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 10983 transitions. [2021-12-17 23:10:20,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 101.69444444444444) internal successors, (10983), 108 states have internal predecessors, (10983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:20,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 211.0) internal successors, (22999), 109 states have internal predecessors, (22999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:20,424 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 211.0) internal successors, (22999), 109 states have internal predecessors, (22999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:20,424 INFO L186 Difference]: Start difference. First operand has 353 places, 382 transitions, 2005 flow. Second operand 108 states and 10983 transitions. [2021-12-17 23:10:20,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 961 transitions, 7400 flow [2021-12-17 23:10:23,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 961 transitions, 6958 flow, removed 169 selfloop flow, removed 45 redundant places. [2021-12-17 23:10:23,065 INFO L242 Difference]: Finished difference. Result has 441 places, 514 transitions, 3768 flow [2021-12-17 23:10:23,065 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=3768, PETRI_PLACES=441, PETRI_TRANSITIONS=514} [2021-12-17 23:10:23,066 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 252 predicate places. [2021-12-17 23:10:23,066 INFO L470 AbstractCegarLoop]: Abstraction has has 441 places, 514 transitions, 3768 flow [2021-12-17 23:10:23,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 100.0) internal successors, (6200), 62 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:23,067 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:10:23,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:10:23,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 23:10:23,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:10:23,285 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:10:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:10:23,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1023830861, now seen corresponding path program 5 times [2021-12-17 23:10:23,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:10:23,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782025089] [2021-12-17 23:10:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:10:23,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:10:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:10:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 23:10:24,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:10:24,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782025089] [2021-12-17 23:10:24,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782025089] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:10:24,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249326126] [2021-12-17 23:10:24,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 23:10:24,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:10:24,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:10:24,058 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) [2021-12-17 23:10:24,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:10:24,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-17 23:10:24,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:10:24,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 23:10:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:10:24,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:10:24,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:10:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 23:10:25,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-17 23:10:25,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-17 23:10:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 23:10:25,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 23:10:25,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249326126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:10:25,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 23:10:25,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [25] total 36 [2021-12-17 23:10:25,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288324718] [2021-12-17 23:10:25,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:10:25,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 23:10:25,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:10:25,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 23:10:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 23:10:25,134 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 211 [2021-12-17 23:10:25,136 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 514 transitions, 3768 flow. Second operand has 14 states, 14 states have (on average 145.57142857142858) internal successors, (2038), 14 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:25,136 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:10:25,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 211 [2021-12-17 23:10:25,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:10:34,173 INFO L129 PetriNetUnfolder]: 15612/42553 cut-off events. [2021-12-17 23:10:34,173 INFO L130 PetriNetUnfolder]: For 394166/399235 co-relation queries the response was YES. [2021-12-17 23:10:35,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172772 conditions, 42553 events. 15612/42553 cut-off events. For 394166/399235 co-relation queries the response was YES. Maximal size of possible extension queue 1323. Compared 522282 event pairs, 4820 based on Foata normal form. 1071/42842 useless extension candidates. Maximal degree in co-relation 172696. Up to 15737 conditions per place. [2021-12-17 23:10:35,378 INFO L132 encePairwiseOnDemand]: 191/211 looper letters, 299 selfloop transitions, 100 changer transitions 8/589 dead transitions. [2021-12-17 23:10:35,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 589 transitions, 5352 flow [2021-12-17 23:10:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 23:10:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-17 23:10:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2639 transitions. [2021-12-17 23:10:35,381 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6948393891521853 [2021-12-17 23:10:35,381 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2639 transitions. [2021-12-17 23:10:35,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2639 transitions. [2021-12-17 23:10:35,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:10:35,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2639 transitions. [2021-12-17 23:10:35,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 146.61111111111111) internal successors, (2639), 18 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:35,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:35,387 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 211.0) internal successors, (4009), 19 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:35,387 INFO L186 Difference]: Start difference. First operand has 441 places, 514 transitions, 3768 flow. Second operand 18 states and 2639 transitions. [2021-12-17 23:10:35,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 589 transitions, 5352 flow [2021-12-17 23:10:39,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 589 transitions, 5103 flow, removed 63 selfloop flow, removed 50 redundant places. [2021-12-17 23:10:39,109 INFO L242 Difference]: Finished difference. Result has 408 places, 518 transitions, 3938 flow [2021-12-17 23:10:39,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3938, PETRI_PLACES=408, PETRI_TRANSITIONS=518} [2021-12-17 23:10:39,110 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 219 predicate places. [2021-12-17 23:10:39,110 INFO L470 AbstractCegarLoop]: Abstraction has has 408 places, 518 transitions, 3938 flow [2021-12-17 23:10:39,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 145.57142857142858) internal successors, (2038), 14 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:39,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:10:39,111 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:10:39,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 23:10:39,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:10:39,329 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:10:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:10:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1947398934, now seen corresponding path program 2 times [2021-12-17 23:10:39,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:10:39,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865721640] [2021-12-17 23:10:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:10:39,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:10:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:10:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 23:10:39,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:10:39,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865721640] [2021-12-17 23:10:39,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865721640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:10:39,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:10:39,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 23:10:39,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720462868] [2021-12-17 23:10:39,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:10:39,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 23:10:39,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:10:39,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 23:10:39,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 23:10:39,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 211 [2021-12-17 23:10:39,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 518 transitions, 3938 flow. Second operand has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:39,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:10:39,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 211 [2021-12-17 23:10:39,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:10:43,373 INFO L129 PetriNetUnfolder]: 6375/21724 cut-off events. [2021-12-17 23:10:43,373 INFO L130 PetriNetUnfolder]: For 224435/227711 co-relation queries the response was YES. [2021-12-17 23:10:43,562 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87576 conditions, 21724 events. 6375/21724 cut-off events. For 224435/227711 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 260882 event pairs, 1425 based on Foata normal form. 577/21641 useless extension candidates. Maximal degree in co-relation 87500. Up to 6803 conditions per place. [2021-12-17 23:10:43,651 INFO L132 encePairwiseOnDemand]: 207/211 looper letters, 181 selfloop transitions, 69 changer transitions 23/564 dead transitions. [2021-12-17 23:10:43,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 564 transitions, 4965 flow [2021-12-17 23:10:43,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 23:10:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 23:10:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 763 transitions. [2021-12-17 23:10:43,653 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9040284360189573 [2021-12-17 23:10:43,653 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 763 transitions. [2021-12-17 23:10:43,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 763 transitions. [2021-12-17 23:10:43,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:10:43,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 763 transitions. [2021-12-17 23:10:43,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.75) internal successors, (763), 4 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:43,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:43,656 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:43,656 INFO L186 Difference]: Start difference. First operand has 408 places, 518 transitions, 3938 flow. Second operand 4 states and 763 transitions. [2021-12-17 23:10:43,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 564 transitions, 4965 flow [2021-12-17 23:10:44,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 564 transitions, 4838 flow, removed 9 selfloop flow, removed 17 redundant places. [2021-12-17 23:10:44,486 INFO L242 Difference]: Finished difference. Result has 390 places, 517 transitions, 4304 flow [2021-12-17 23:10:44,486 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=3730, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4304, PETRI_PLACES=390, PETRI_TRANSITIONS=517} [2021-12-17 23:10:44,487 INFO L334 CegarLoopForPetriNet]: 189 programPoint places, 201 predicate places. [2021-12-17 23:10:44,487 INFO L470 AbstractCegarLoop]: Abstraction has has 390 places, 517 transitions, 4304 flow [2021-12-17 23:10:44,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:44,487 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:10:44,487 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:10:44,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 23:10:44,488 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:10:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:10:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash 16439513, now seen corresponding path program 1 times [2021-12-17 23:10:44,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:10:44,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972689355] [2021-12-17 23:10:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:10:44,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:10:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:10:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:10:46,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:10:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972689355] [2021-12-17 23:10:46,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972689355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:10:46,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942962259] [2021-12-17 23:10:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:10:46,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:10:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:10:46,139 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) [2021-12-17 23:10:46,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 23:10:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:10:46,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 23:10:46,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:10:47,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-12-17 23:10:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 23:10:47,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:10:47,784 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-17 23:10:47,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2021-12-17 23:10:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 23:10:48,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942962259] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:10:48,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:10:48,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 20, 15] total 66 [2021-12-17 23:10:48,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097922684] [2021-12-17 23:10:48,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:10:48,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-17 23:10:48,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:10:48,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-17 23:10:48,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 23:10:48,554 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 211 [2021-12-17 23:10:48,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 517 transitions, 4304 flow. Second operand has 66 states, 66 states have (on average 118.42424242424242) internal successors, (7816), 66 states have internal predecessors, (7816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:10:48,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:10:48,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 211 [2021-12-17 23:10:48,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand