./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-simple-queue.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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:39:42,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:39:42,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:39:42,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:39:42,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:39:42,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:39:42,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:39:42,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:39:42,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:39:42,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:39:42,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:39:42,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:39:42,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:39:42,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:39:42,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:39:42,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:39:42,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:39:42,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:39:42,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:39:42,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:39:42,235 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:39:42,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:39:42,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:39:42,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:39:42,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:39:42,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:39:42,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:39:42,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:39:42,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:39:42,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:39:42,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:39:42,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:39:42,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:39:42,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:39:42,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:39:42,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:39:42,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:39:42,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:39:42,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:39:42,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:39:42,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:39:42,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:39:42,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:39:42,287 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:39:42,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:39:42,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:39:42,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:39:42,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:39:42,289 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:39:42,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:39:42,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:39:42,290 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:39:42,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:39:42,291 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:39:42,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:39:42,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:39:42,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:39:42,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:39:42,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:39:42,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:39:42,292 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:39:42,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:39:42,292 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:39:42,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:39:42,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:39:42,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:39:42,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:39:42,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:39:42,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:39:42,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:39:42,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:39:42,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:39:42,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:39:42,295 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:39:42,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:39:42,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:39:42,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-07-12 10:39:42,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:39:42,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:39:42,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:39:42,580 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:39:42,581 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:39:42,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-07-12 10:39:42,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337857977/0d7022e7127544afb9a133cca15a572f/FLAG5108b7549 [2022-07-12 10:39:43,064 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:39:43,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-07-12 10:39:43,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337857977/0d7022e7127544afb9a133cca15a572f/FLAG5108b7549 [2022-07-12 10:39:43,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337857977/0d7022e7127544afb9a133cca15a572f [2022-07-12 10:39:43,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:39:43,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:39:43,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:39:43,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:39:43,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:39:43,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4775f4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43, skipping insertion in model container [2022-07-12 10:39:43,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:39:43,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:39:43,649 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-simple-queue.wvr.c[2438,2451] [2022-07-12 10:39:43,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:39:43,663 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:39:43,678 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-simple-queue.wvr.c[2438,2451] [2022-07-12 10:39:43,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:39:43,691 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:39:43,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43 WrapperNode [2022-07-12 10:39:43,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:39:43,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:39:43,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:39:43,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:39:43,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,743 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 128 [2022-07-12 10:39:43,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:39:43,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:39:43,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:39:43,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:39:43,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:39:43,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:39:43,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:39:43,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:39:43,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (1/1) ... [2022-07-12 10:39:43,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:39:43,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:43,830 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) [2022-07-12 10:39:43,836 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 [2022-07-12 10:39:43,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:39:43,871 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:39:43,871 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:39:43,871 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:39:43,871 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:39:43,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:39:43,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:39:43,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:39:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:39:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:39:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:39:43,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:39:43,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:39:43,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:39:43,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:39:43,879 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:39:44,006 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:39:44,014 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:39:44,258 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:39:44,369 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:39:44,369 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:39:44,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:39:44 BoogieIcfgContainer [2022-07-12 10:39:44,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:39:44,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:39:44,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:39:44,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:39:44,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:39:43" (1/3) ... [2022-07-12 10:39:44,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7735fc58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:39:44, skipping insertion in model container [2022-07-12 10:39:44,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:39:43" (2/3) ... [2022-07-12 10:39:44,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7735fc58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:39:44, skipping insertion in model container [2022-07-12 10:39:44,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:39:44" (3/3) ... [2022-07-12 10:39:44,382 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-07-12 10:39:44,389 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:39:44,397 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:39:44,397 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:39:44,398 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:39:44,468 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:39:44,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 256 flow [2022-07-12 10:39:44,580 INFO L129 PetriNetUnfolder]: 9/118 cut-off events. [2022-07-12 10:39:44,583 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:39:44,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 9/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-07-12 10:39:44,587 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 256 flow [2022-07-12 10:39:44,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2022-07-12 10:39:44,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:39:44,613 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6cf1e8a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@17640b48 [2022-07-12 10:39:44,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:39:44,633 INFO L129 PetriNetUnfolder]: 9/108 cut-off events. [2022-07-12 10:39:44,633 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:39:44,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:44,634 INFO L200 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] [2022-07-12 10:39:44,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:44,642 INFO L85 PathProgramCache]: Analyzing trace with hash -93732278, now seen corresponding path program 1 times [2022-07-12 10:39:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:44,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832888023] [2022-07-12 10:39:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:44,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:44,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832888023] [2022-07-12 10:39:44,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832888023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:39:44,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:39:44,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:39:44,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59987523] [2022-07-12 10:39:44,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:44,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:39:44,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:44,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:39:44,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:39:44,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 120 [2022-07-12 10:39:44,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 230 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:44,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:44,920 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 120 [2022-07-12 10:39:44,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:44,986 INFO L129 PetriNetUnfolder]: 5/105 cut-off events. [2022-07-12 10:39:44,986 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:39:44,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 105 events. 5/105 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 83. Up to 9 conditions per place. [2022-07-12 10:39:44,989 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 6 selfloop transitions, 0 changer transitions 3/103 dead transitions. [2022-07-12 10:39:44,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 103 transitions, 230 flow [2022-07-12 10:39:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:39:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:39:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-07-12 10:39:45,003 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9416666666666667 [2022-07-12 10:39:45,004 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-07-12 10:39:45,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-07-12 10:39:45,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:45,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-07-12 10:39:45,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,021 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,023 INFO L186 Difference]: Start difference. First operand has 107 places, 109 transitions, 230 flow. Second operand 2 states and 226 transitions. [2022-07-12 10:39:45,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 103 transitions, 230 flow [2022-07-12 10:39:45,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 103 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:39:45,032 INFO L242 Difference]: Finished difference. Result has 104 places, 100 transitions, 204 flow [2022-07-12 10:39:45,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-07-12 10:39:45,042 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -3 predicate places. [2022-07-12 10:39:45,043 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 204 flow [2022-07-12 10:39:45,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,044 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:45,044 INFO L200 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] [2022-07-12 10:39:45,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:39:45,045 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:45,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1102375271, now seen corresponding path program 1 times [2022-07-12 10:39:45,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:45,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318266717] [2022-07-12 10:39:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:45,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:45,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318266717] [2022-07-12 10:39:45,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318266717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:39:45,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:39:45,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:39:45,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370362312] [2022-07-12 10:39:45,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:45,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:39:45,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:39:45,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:39:45,318 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-12 10:39:45,318 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,318 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:45,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-12 10:39:45,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:45,412 INFO L129 PetriNetUnfolder]: 7/120 cut-off events. [2022-07-12 10:39:45,412 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:39:45,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 120 events. 7/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 152. Up to 15 conditions per place. [2022-07-12 10:39:45,415 INFO L132 encePairwiseOnDemand]: 115/120 looper letters, 21 selfloop transitions, 2 changer transitions 4/107 dead transitions. [2022-07-12 10:39:45,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 274 flow [2022-07-12 10:39:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:39:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:39:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2022-07-12 10:39:45,422 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7966666666666666 [2022-07-12 10:39:45,422 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2022-07-12 10:39:45,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2022-07-12 10:39:45,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:45,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2022-07-12 10:39:45,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,429 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,430 INFO L186 Difference]: Start difference. First operand has 104 places, 100 transitions, 204 flow. Second operand 5 states and 478 transitions. [2022-07-12 10:39:45,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 274 flow [2022-07-12 10:39:45,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:39:45,434 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 220 flow [2022-07-12 10:39:45,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-07-12 10:39:45,436 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-07-12 10:39:45,436 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 220 flow [2022-07-12 10:39:45,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,437 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:45,437 INFO L200 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] [2022-07-12 10:39:45,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:39:45,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1844346479, now seen corresponding path program 1 times [2022-07-12 10:39:45,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:45,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790824910] [2022-07-12 10:39:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:45,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:45,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:45,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790824910] [2022-07-12 10:39:45,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790824910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:39:45,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:39:45,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:39:45,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384091572] [2022-07-12 10:39:45,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:45,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:39:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:39:45,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:39:45,540 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-07-12 10:39:45,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:45,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-07-12 10:39:45,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:45,580 INFO L129 PetriNetUnfolder]: 8/142 cut-off events. [2022-07-12 10:39:45,581 INFO L130 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-07-12 10:39:45,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 142 events. 8/142 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 193 event pairs, 1 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 177. Up to 18 conditions per place. [2022-07-12 10:39:45,582 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 11 selfloop transitions, 2 changer transitions 2/105 dead transitions. [2022-07-12 10:39:45,582 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 261 flow [2022-07-12 10:39:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:39:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:39:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2022-07-12 10:39:45,584 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-12 10:39:45,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2022-07-12 10:39:45,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2022-07-12 10:39:45,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:45,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2022-07-12 10:39:45,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,587 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 220 flow. Second operand 3 states and 324 transitions. [2022-07-12 10:39:45,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 261 flow [2022-07-12 10:39:45,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 255 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-12 10:39:45,590 INFO L242 Difference]: Finished difference. Result has 106 places, 102 transitions, 226 flow [2022-07-12 10:39:45,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-07-12 10:39:45,591 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, -1 predicate places. [2022-07-12 10:39:45,592 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 226 flow [2022-07-12 10:39:45,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:45,592 INFO L200 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] [2022-07-12 10:39:45,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:39:45,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash 488492189, now seen corresponding path program 1 times [2022-07-12 10:39:45,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:45,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942956552] [2022-07-12 10:39:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:45,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:39:45,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:45,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942956552] [2022-07-12 10:39:45,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942956552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:39:45,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:39:45,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:39:45,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106822629] [2022-07-12 10:39:45,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:45,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:39:45,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:45,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:39:45,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:39:45,714 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2022-07-12 10:39:45,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:45,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2022-07-12 10:39:45,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:45,852 INFO L129 PetriNetUnfolder]: 8/185 cut-off events. [2022-07-12 10:39:45,852 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-12 10:39:45,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 185 events. 8/185 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 363 event pairs, 2 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 247. Up to 28 conditions per place. [2022-07-12 10:39:45,861 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 20 selfloop transitions, 6 changer transitions 5/111 dead transitions. [2022-07-12 10:39:45,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 310 flow [2022-07-12 10:39:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:39:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:39:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2022-07-12 10:39:45,865 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8107142857142857 [2022-07-12 10:39:45,865 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2022-07-12 10:39:45,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2022-07-12 10:39:45,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:45,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2022-07-12 10:39:45,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,871 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,871 INFO L186 Difference]: Start difference. First operand has 106 places, 102 transitions, 226 flow. Second operand 7 states and 681 transitions. [2022-07-12 10:39:45,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 310 flow [2022-07-12 10:39:45,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:39:45,875 INFO L242 Difference]: Finished difference. Result has 113 places, 103 transitions, 246 flow [2022-07-12 10:39:45,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=246, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2022-07-12 10:39:45,876 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-07-12 10:39:45,876 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 246 flow [2022-07-12 10:39:45,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:45,877 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:45,877 INFO L200 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] [2022-07-12 10:39:45,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:39:45,878 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:45,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:45,878 INFO L85 PathProgramCache]: Analyzing trace with hash -968534906, now seen corresponding path program 1 times [2022-07-12 10:39:45,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:45,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907291401] [2022-07-12 10:39:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:45,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:46,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:46,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907291401] [2022-07-12 10:39:46,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907291401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:46,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288861423] [2022-07-12 10:39:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:46,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:46,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:46,410 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) [2022-07-12 10:39:46,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:39:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:46,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 10:39:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:46,570 INFO L390 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 [2022-07-12 10:39:46,614 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 10:39:46,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-12 10:39:47,006 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:39:47,007 INFO L390 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 15 treesize of output 15 [2022-07-12 10:39:47,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 10:39:47,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:39:47,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:39:47,697 INFO L390 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 [2022-07-12 10:39:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:47,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:48,561 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:39:48,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-07-12 10:39:48,572 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-12 10:39:48,573 INFO L390 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 140 treesize of output 131 [2022-07-12 10:39:48,583 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-12 10:39:48,583 INFO L390 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 124 treesize of output 100 [2022-07-12 10:39:48,595 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-12 10:39:48,597 INFO L390 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 79 treesize of output 67 [2022-07-12 10:39:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:49,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288861423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:49,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:49,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 20] total 50 [2022-07-12 10:39:49,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712018285] [2022-07-12 10:39:49,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:49,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 10:39:49,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:49,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 10:39:49,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1985, Unknown=32, NotChecked=0, Total=2450 [2022-07-12 10:39:49,199 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-07-12 10:39:49,203 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 246 flow. Second operand has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:49,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:49,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-07-12 10:39:49,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:51,623 INFO L129 PetriNetUnfolder]: 89/629 cut-off events. [2022-07-12 10:39:51,623 INFO L130 PetriNetUnfolder]: For 167/167 co-relation queries the response was YES. [2022-07-12 10:39:51,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 629 events. 89/629 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3639 event pairs, 0 based on Foata normal form. 4/589 useless extension candidates. Maximal degree in co-relation 1064. Up to 71 conditions per place. [2022-07-12 10:39:51,631 INFO L132 encePairwiseOnDemand]: 95/120 looper letters, 114 selfloop transitions, 44 changer transitions 25/225 dead transitions. [2022-07-12 10:39:51,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 225 transitions, 964 flow [2022-07-12 10:39:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 10:39:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-12 10:39:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2008 transitions. [2022-07-12 10:39:51,637 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44035087719298244 [2022-07-12 10:39:51,638 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2008 transitions. [2022-07-12 10:39:51,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2008 transitions. [2022-07-12 10:39:51,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:51,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2008 transitions. [2022-07-12 10:39:51,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.8421052631579) internal successors, (2008), 38 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:51,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:51,652 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:51,652 INFO L186 Difference]: Start difference. First operand has 113 places, 103 transitions, 246 flow. Second operand 38 states and 2008 transitions. [2022-07-12 10:39:51,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 225 transitions, 964 flow [2022-07-12 10:39:51,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 225 transitions, 950 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-07-12 10:39:51,658 INFO L242 Difference]: Finished difference. Result has 163 places, 139 transitions, 552 flow [2022-07-12 10:39:51,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=552, PETRI_PLACES=163, PETRI_TRANSITIONS=139} [2022-07-12 10:39:51,659 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-12 10:39:51,659 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 139 transitions, 552 flow [2022-07-12 10:39:51,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 50.66) internal successors, (2533), 50 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:51,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:51,661 INFO L200 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] [2022-07-12 10:39:51,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 10:39:51,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:51,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:51,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:51,876 INFO L85 PathProgramCache]: Analyzing trace with hash 194607390, now seen corresponding path program 2 times [2022-07-12 10:39:51,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:51,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445703392] [2022-07-12 10:39:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:52,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:52,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445703392] [2022-07-12 10:39:52,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445703392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:52,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609271063] [2022-07-12 10:39:52,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:39:52,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:52,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:52,376 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) [2022-07-12 10:39:52,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:39:52,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:39:52,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 10:39:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:52,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 10:39:53,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:39:53,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:39:53,326 INFO L390 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 [2022-07-12 10:39:53,431 INFO L390 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 [2022-07-12 10:39:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:53,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:53,505 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_98 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_98) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-12 10:39:54,127 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:39:54,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2022-07-12 10:39:54,138 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:39:54,139 INFO L390 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 100 treesize of output 100 [2022-07-12 10:39:54,144 INFO L390 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 60 treesize of output 48 [2022-07-12 10:39:54,157 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:39:54,158 INFO L390 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 51 treesize of output 55 [2022-07-12 10:39:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-12 10:39:54,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609271063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:54,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:54,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 54 [2022-07-12 10:39:54,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453392472] [2022-07-12 10:39:54,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:54,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 10:39:54,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:54,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 10:39:54,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2541, Unknown=9, NotChecked=102, Total=2862 [2022-07-12 10:39:54,811 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 120 [2022-07-12 10:39:54,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 139 transitions, 552 flow. Second operand has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 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) [2022-07-12 10:39:54,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:54,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 120 [2022-07-12 10:39:54,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:57,610 INFO L129 PetriNetUnfolder]: 178/1123 cut-off events. [2022-07-12 10:39:57,610 INFO L130 PetriNetUnfolder]: For 1080/1088 co-relation queries the response was YES. [2022-07-12 10:39:57,614 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2315 conditions, 1123 events. 178/1123 cut-off events. For 1080/1088 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8552 event pairs, 5 based on Foata normal form. 12/1045 useless extension candidates. Maximal degree in co-relation 2289. Up to 170 conditions per place. [2022-07-12 10:39:57,618 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 96 selfloop transitions, 85 changer transitions 15/238 dead transitions. [2022-07-12 10:39:57,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 238 transitions, 1432 flow [2022-07-12 10:39:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 10:39:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-12 10:39:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1976 transitions. [2022-07-12 10:39:57,624 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-07-12 10:39:57,624 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1976 transitions. [2022-07-12 10:39:57,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1976 transitions. [2022-07-12 10:39:57,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:57,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1976 transitions. [2022-07-12 10:39:57,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 52.0) internal successors, (1976), 38 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:57,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:57,640 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:57,640 INFO L186 Difference]: Start difference. First operand has 163 places, 139 transitions, 552 flow. Second operand 38 states and 1976 transitions. [2022-07-12 10:39:57,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 238 transitions, 1432 flow [2022-07-12 10:39:57,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 238 transitions, 1263 flow, removed 72 selfloop flow, removed 19 redundant places. [2022-07-12 10:39:57,651 INFO L242 Difference]: Finished difference. Result has 184 places, 185 transitions, 1018 flow [2022-07-12 10:39:57,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1018, PETRI_PLACES=184, PETRI_TRANSITIONS=185} [2022-07-12 10:39:57,652 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 77 predicate places. [2022-07-12 10:39:57,652 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 185 transitions, 1018 flow [2022-07-12 10:39:57,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 50.574074074074076) internal successors, (2731), 54 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) [2022-07-12 10:39:57,654 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:57,654 INFO L200 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] [2022-07-12 10:39:57,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:57,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 10:39:57,872 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash 970602436, now seen corresponding path program 3 times [2022-07-12 10:39:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:57,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865152703] [2022-07-12 10:39:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:57,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:39:57,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:57,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865152703] [2022-07-12 10:39:57,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865152703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:39:57,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:39:57,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:39:57,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175556425] [2022-07-12 10:39:57,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:39:57,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:39:57,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:39:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:39:57,971 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 120 [2022-07-12 10:39:57,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 185 transitions, 1018 flow. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:57,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:57,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 120 [2022-07-12 10:39:57,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:58,121 INFO L129 PetriNetUnfolder]: 124/1041 cut-off events. [2022-07-12 10:39:58,122 INFO L130 PetriNetUnfolder]: For 1657/1721 co-relation queries the response was YES. [2022-07-12 10:39:58,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2191 conditions, 1041 events. 124/1041 cut-off events. For 1657/1721 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 8080 event pairs, 9 based on Foata normal form. 24/978 useless extension candidates. Maximal degree in co-relation 2164. Up to 178 conditions per place. [2022-07-12 10:39:58,129 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 55 selfloop transitions, 30 changer transitions 2/197 dead transitions. [2022-07-12 10:39:58,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 197 transitions, 1280 flow [2022-07-12 10:39:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:39:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:39:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2022-07-12 10:39:58,131 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-07-12 10:39:58,132 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2022-07-12 10:39:58,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2022-07-12 10:39:58,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:58,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2022-07-12 10:39:58,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:58,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:58,135 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:58,135 INFO L186 Difference]: Start difference. First operand has 184 places, 185 transitions, 1018 flow. Second operand 4 states and 432 transitions. [2022-07-12 10:39:58,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 197 transitions, 1280 flow [2022-07-12 10:39:58,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 197 transitions, 1193 flow, removed 20 selfloop flow, removed 26 redundant places. [2022-07-12 10:39:58,146 INFO L242 Difference]: Finished difference. Result has 158 places, 189 transitions, 1108 flow [2022-07-12 10:39:58,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1108, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2022-07-12 10:39:58,147 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 51 predicate places. [2022-07-12 10:39:58,147 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 1108 flow [2022-07-12 10:39:58,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:58,147 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:58,148 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:39:58,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:39:58,148 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash -455356886, now seen corresponding path program 4 times [2022-07-12 10:39:58,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:58,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922748147] [2022-07-12 10:39:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:58,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 10:39:58,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:58,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922748147] [2022-07-12 10:39:58,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922748147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:58,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135476933] [2022-07-12 10:39:58,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:39:58,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:58,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:58,275 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) [2022-07-12 10:39:58,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:39:58,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:39:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 10:39:58,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:39:58,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:39:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:39:58,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135476933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:39:58,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:39:58,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-12 10:39:58,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884991573] [2022-07-12 10:39:58,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:39:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 10:39:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:39:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 10:39:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-12 10:39:58,636 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-12 10:39:58,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 1108 flow. Second operand has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:58,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:39:58,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-12 10:39:58,638 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:39:58,912 INFO L129 PetriNetUnfolder]: 45/592 cut-off events. [2022-07-12 10:39:58,913 INFO L130 PetriNetUnfolder]: For 1096/1133 co-relation queries the response was YES. [2022-07-12 10:39:58,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 592 events. 45/592 cut-off events. For 1096/1133 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3467 event pairs, 11 based on Foata normal form. 11/554 useless extension candidates. Maximal degree in co-relation 1210. Up to 103 conditions per place. [2022-07-12 10:39:58,917 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 48 selfloop transitions, 11 changer transitions 21/159 dead transitions. [2022-07-12 10:39:58,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 159 transitions, 917 flow [2022-07-12 10:39:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:39:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:39:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2022-07-12 10:39:58,920 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7798611111111111 [2022-07-12 10:39:58,921 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2022-07-12 10:39:58,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2022-07-12 10:39:58,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:39:58,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2022-07-12 10:39:58,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:58,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:58,927 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 120.0) internal successors, (1560), 13 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:58,927 INFO L186 Difference]: Start difference. First operand has 158 places, 189 transitions, 1108 flow. Second operand 12 states and 1123 transitions. [2022-07-12 10:39:58,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 159 transitions, 917 flow [2022-07-12 10:39:58,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 159 transitions, 895 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-07-12 10:39:58,934 INFO L242 Difference]: Finished difference. Result has 163 places, 134 transitions, 632 flow [2022-07-12 10:39:58,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=632, PETRI_PLACES=163, PETRI_TRANSITIONS=134} [2022-07-12 10:39:58,935 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-12 10:39:58,936 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 134 transitions, 632 flow [2022-07-12 10:39:58,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 92.63157894736842) internal successors, (1760), 19 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:39:58,937 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:39:58,937 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:39:58,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:39:59,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:59,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:39:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:39:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash -458696651, now seen corresponding path program 5 times [2022-07-12 10:39:59,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:39:59,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973063268] [2022-07-12 10:39:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:39:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:39:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:39:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:39:59,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:39:59,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973063268] [2022-07-12 10:39:59,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973063268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:39:59,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660674386] [2022-07-12 10:39:59,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:39:59,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:39:59,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:39:59,724 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) [2022-07-12 10:39:59,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:39:59,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:39:59,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:39:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 10:39:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:39:59,824 INFO L390 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 [2022-07-12 10:39:59,999 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:40:00,000 INFO L390 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 [2022-07-12 10:40:00,636 INFO L390 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 [2022-07-12 10:40:00,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-12 10:40:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:00,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:01,024 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:40:01,025 INFO L390 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 42 treesize of output 42 [2022-07-12 10:40:01,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-12 10:40:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:02,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660674386] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:02,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:02,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 58 [2022-07-12 10:40:02,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367239412] [2022-07-12 10:40:02,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:02,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-12 10:40:02,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:02,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-12 10:40:02,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2022-07-12 10:40:02,116 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-12 10:40:02,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 134 transitions, 632 flow. Second operand has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:02,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:02,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-12 10:40:02,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:06,634 INFO L129 PetriNetUnfolder]: 259/1704 cut-off events. [2022-07-12 10:40:06,634 INFO L130 PetriNetUnfolder]: For 3342/3346 co-relation queries the response was YES. [2022-07-12 10:40:06,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4083 conditions, 1704 events. 259/1704 cut-off events. For 3342/3346 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14766 event pairs, 8 based on Foata normal form. 14/1582 useless extension candidates. Maximal degree in co-relation 4061. Up to 213 conditions per place. [2022-07-12 10:40:06,649 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 156 selfloop transitions, 91 changer transitions 49/338 dead transitions. [2022-07-12 10:40:06,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 338 transitions, 2566 flow [2022-07-12 10:40:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-12 10:40:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-07-12 10:40:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3082 transitions. [2022-07-12 10:40:06,655 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.442816091954023 [2022-07-12 10:40:06,655 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3082 transitions. [2022-07-12 10:40:06,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3082 transitions. [2022-07-12 10:40:06,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:06,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3082 transitions. [2022-07-12 10:40:06,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.13793103448276) internal successors, (3082), 58 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:06,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:06,674 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 120.0) internal successors, (7080), 59 states have internal predecessors, (7080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:06,675 INFO L186 Difference]: Start difference. First operand has 163 places, 134 transitions, 632 flow. Second operand 58 states and 3082 transitions. [2022-07-12 10:40:06,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 338 transitions, 2566 flow [2022-07-12 10:40:06,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 338 transitions, 2402 flow, removed 66 selfloop flow, removed 14 redundant places. [2022-07-12 10:40:06,689 INFO L242 Difference]: Finished difference. Result has 225 places, 195 transitions, 1554 flow [2022-07-12 10:40:06,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=1554, PETRI_PLACES=225, PETRI_TRANSITIONS=195} [2022-07-12 10:40:06,690 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 118 predicate places. [2022-07-12 10:40:06,690 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 195 transitions, 1554 flow [2022-07-12 10:40:06,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 51.6551724137931) internal successors, (2996), 58 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:06,692 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:06,692 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:40:06,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:06,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:06,899 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1601581429, now seen corresponding path program 6 times [2022-07-12 10:40:06,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:06,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497161549] [2022-07-12 10:40:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:06,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:07,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497161549] [2022-07-12 10:40:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497161549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:07,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347523044] [2022-07-12 10:40:07,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:40:07,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:07,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:07,408 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) [2022-07-12 10:40:07,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:40:07,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 10:40:07,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 10:40:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:07,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 10:40:08,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:40:08,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:40:08,542 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-12 10:40:08,543 INFO L390 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 23 treesize of output 10 [2022-07-12 10:40:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:08,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:09,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:40:09,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2022-07-12 10:40:09,546 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 10:40:09,547 INFO L390 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 144 treesize of output 136 [2022-07-12 10:40:09,553 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:40:09,553 INFO L390 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 127 treesize of output 101 [2022-07-12 10:40:09,561 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:40:09,561 INFO L390 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 80 treesize of output 67 [2022-07-12 10:40:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:10,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347523044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:10,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:10,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 23] total 61 [2022-07-12 10:40:10,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380009681] [2022-07-12 10:40:10,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:10,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-12 10:40:10,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:10,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-12 10:40:10,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=3214, Unknown=38, NotChecked=0, Total=3660 [2022-07-12 10:40:10,227 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-07-12 10:40:10,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 195 transitions, 1554 flow. Second operand has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:10,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:10,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-07-12 10:40:10,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:13,919 INFO L129 PetriNetUnfolder]: 517/2812 cut-off events. [2022-07-12 10:40:13,919 INFO L130 PetriNetUnfolder]: For 13830/13891 co-relation queries the response was YES. [2022-07-12 10:40:13,933 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8491 conditions, 2812 events. 517/2812 cut-off events. For 13830/13891 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 27202 event pairs, 19 based on Foata normal form. 36/2628 useless extension candidates. Maximal degree in co-relation 8442. Up to 440 conditions per place. [2022-07-12 10:40:13,945 INFO L132 encePairwiseOnDemand]: 87/120 looper letters, 176 selfloop transitions, 140 changer transitions 30/391 dead transitions. [2022-07-12 10:40:13,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 391 transitions, 4023 flow [2022-07-12 10:40:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-12 10:40:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-12 10:40:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2660 transitions. [2022-07-12 10:40:13,949 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2022-07-12 10:40:13,949 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2660 transitions. [2022-07-12 10:40:13,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2660 transitions. [2022-07-12 10:40:13,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:13,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2660 transitions. [2022-07-12 10:40:13,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 55.416666666666664) internal successors, (2660), 48 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,963 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 120.0) internal successors, (5880), 49 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:13,963 INFO L186 Difference]: Start difference. First operand has 225 places, 195 transitions, 1554 flow. Second operand 48 states and 2660 transitions. [2022-07-12 10:40:13,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 391 transitions, 4023 flow [2022-07-12 10:40:13,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 391 transitions, 3690 flow, removed 147 selfloop flow, removed 31 redundant places. [2022-07-12 10:40:13,999 INFO L242 Difference]: Finished difference. Result has 246 places, 286 transitions, 2961 flow [2022-07-12 10:40:14,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2961, PETRI_PLACES=246, PETRI_TRANSITIONS=286} [2022-07-12 10:40:14,001 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 139 predicate places. [2022-07-12 10:40:14,001 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 286 transitions, 2961 flow [2022-07-12 10:40:14,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 53.50819672131148) internal successors, (3264), 61 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:14,003 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:14,003 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:40:14,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 10:40:14,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1615726847, now seen corresponding path program 7 times [2022-07-12 10:40:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:14,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150511443] [2022-07-12 10:40:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:14,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:14,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:14,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150511443] [2022-07-12 10:40:14,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150511443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:14,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330030437] [2022-07-12 10:40:14,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:40:14,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:14,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:14,730 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) [2022-07-12 10:40:14,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:40:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:14,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 10:40:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:15,402 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-12 10:40:15,403 INFO L390 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 23 treesize of output 10 [2022-07-12 10:40:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:15,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:15,510 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 10:40:15,510 INFO L390 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 17 [2022-07-12 10:40:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:16,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330030437] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:16,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:16,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-07-12 10:40:16,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097440748] [2022-07-12 10:40:16,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:16,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 10:40:16,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 10:40:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 10:40:16,324 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-12 10:40:16,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 286 transitions, 2961 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:16,326 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:16,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-12 10:40:16,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:20,372 INFO L129 PetriNetUnfolder]: 1034/5302 cut-off events. [2022-07-12 10:40:20,372 INFO L130 PetriNetUnfolder]: For 50600/50832 co-relation queries the response was YES. [2022-07-12 10:40:20,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21835 conditions, 5302 events. 1034/5302 cut-off events. For 50600/50832 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 58106 event pairs, 4 based on Foata normal form. 93/4996 useless extension candidates. Maximal degree in co-relation 21781. Up to 956 conditions per place. [2022-07-12 10:40:20,419 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 283 selfloop transitions, 288 changer transitions 62/681 dead transitions. [2022-07-12 10:40:20,419 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 681 transitions, 9896 flow [2022-07-12 10:40:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-12 10:40:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-07-12 10:40:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4159 transitions. [2022-07-12 10:40:20,424 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5251262626262626 [2022-07-12 10:40:20,425 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4159 transitions. [2022-07-12 10:40:20,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4159 transitions. [2022-07-12 10:40:20,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:20,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4159 transitions. [2022-07-12 10:40:20,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 63.015151515151516) internal successors, (4159), 66 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:20,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:20,443 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 120.0) internal successors, (8040), 67 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:20,443 INFO L186 Difference]: Start difference. First operand has 246 places, 286 transitions, 2961 flow. Second operand 66 states and 4159 transitions. [2022-07-12 10:40:20,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 681 transitions, 9896 flow [2022-07-12 10:40:20,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 681 transitions, 9398 flow, removed 219 selfloop flow, removed 30 redundant places. [2022-07-12 10:40:20,578 INFO L242 Difference]: Finished difference. Result has 308 places, 452 transitions, 6366 flow [2022-07-12 10:40:20,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=6366, PETRI_PLACES=308, PETRI_TRANSITIONS=452} [2022-07-12 10:40:20,580 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 201 predicate places. [2022-07-12 10:40:20,580 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 452 transitions, 6366 flow [2022-07-12 10:40:20,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:20,581 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:20,581 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:40:20,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:20,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:20,796 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:20,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:20,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2050011769, now seen corresponding path program 8 times [2022-07-12 10:40:20,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:20,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866239473] [2022-07-12 10:40:20,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:20,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:21,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:21,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866239473] [2022-07-12 10:40:21,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866239473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:21,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397110151] [2022-07-12 10:40:21,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:40:21,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:21,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:21,311 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) [2022-07-12 10:40:21,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:40:21,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:40:21,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-12 10:40:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:21,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 10:40:22,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:40:22,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 10:40:22,411 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-12 10:40:22,412 INFO L390 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 23 treesize of output 10 [2022-07-12 10:40:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:22,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:23,355 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:40:23,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2022-07-12 10:40:23,366 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 10:40:23,367 INFO L390 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 308 treesize of output 283 [2022-07-12 10:40:23,380 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:40:23,381 INFO L390 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 274 treesize of output 248 [2022-07-12 10:40:23,392 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-12 10:40:23,392 INFO L390 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 248 treesize of output 196 [2022-07-12 10:40:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:24,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397110151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:24,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:24,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 23] total 62 [2022-07-12 10:40:24,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698510064] [2022-07-12 10:40:24,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:24,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-12 10:40:24,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-12 10:40:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=3330, Unknown=39, NotChecked=0, Total=3782 [2022-07-12 10:40:24,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 120 [2022-07-12 10:40:24,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 452 transitions, 6366 flow. Second operand has 62 states, 62 states have (on average 53.46774193548387) internal successors, (3315), 62 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:24,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:24,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 120 [2022-07-12 10:40:24,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:27,681 INFO L129 PetriNetUnfolder]: 1322/6904 cut-off events. [2022-07-12 10:40:27,681 INFO L130 PetriNetUnfolder]: For 99079/99400 co-relation queries the response was YES. [2022-07-12 10:40:27,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32509 conditions, 6904 events. 1322/6904 cut-off events. For 99079/99400 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 81888 event pairs, 6 based on Foata normal form. 94/6457 useless extension candidates. Maximal degree in co-relation 32429. Up to 1269 conditions per place. [2022-07-12 10:40:27,767 INFO L132 encePairwiseOnDemand]: 89/120 looper letters, 287 selfloop transitions, 413 changer transitions 42/787 dead transitions. [2022-07-12 10:40:27,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 787 transitions, 14014 flow [2022-07-12 10:40:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-12 10:40:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-12 10:40:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2895 transitions. [2022-07-12 10:40:27,772 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2022-07-12 10:40:27,773 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2895 transitions. [2022-07-12 10:40:27,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2895 transitions. [2022-07-12 10:40:27,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:27,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2895 transitions. [2022-07-12 10:40:27,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 55.67307692307692) internal successors, (2895), 52 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:27,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 120.0) internal successors, (6360), 53 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:27,785 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 120.0) internal successors, (6360), 53 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:27,785 INFO L186 Difference]: Start difference. First operand has 308 places, 452 transitions, 6366 flow. Second operand 52 states and 2895 transitions. [2022-07-12 10:40:27,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 787 transitions, 14014 flow [2022-07-12 10:40:28,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 787 transitions, 12869 flow, removed 538 selfloop flow, removed 35 redundant places. [2022-07-12 10:40:28,152 INFO L242 Difference]: Finished difference. Result has 331 places, 624 transitions, 10240 flow [2022-07-12 10:40:28,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=5753, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=10240, PETRI_PLACES=331, PETRI_TRANSITIONS=624} [2022-07-12 10:40:28,153 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 224 predicate places. [2022-07-12 10:40:28,153 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 624 transitions, 10240 flow [2022-07-12 10:40:28,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 53.46774193548387) internal successors, (3315), 62 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:28,154 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:28,154 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:40:28,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-12 10:40:28,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:28,368 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 122552891, now seen corresponding path program 9 times [2022-07-12 10:40:28,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:28,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968387036] [2022-07-12 10:40:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:28,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:28,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:28,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968387036] [2022-07-12 10:40:28,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968387036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:28,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843752784] [2022-07-12 10:40:28,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:40:28,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:28,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:28,790 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) [2022-07-12 10:40:28,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:40:28,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:40:28,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:28,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 10:40:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:29,230 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-12 10:40:29,231 INFO L390 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 23 treesize of output 10 [2022-07-12 10:40:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:40:29,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:29,447 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-12 10:40:29,448 INFO L390 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 [2022-07-12 10:40:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:40:29,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843752784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:29,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:29,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9, 9] total 30 [2022-07-12 10:40:29,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506255714] [2022-07-12 10:40:29,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:29,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 10:40:29,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 10:40:29,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:40:29,605 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-12 10:40:29,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 624 transitions, 10240 flow. Second operand has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:29,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:29,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-12 10:40:29,606 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:32,800 INFO L129 PetriNetUnfolder]: 1864/9791 cut-off events. [2022-07-12 10:40:32,801 INFO L130 PetriNetUnfolder]: For 174955/175607 co-relation queries the response was YES. [2022-07-12 10:40:32,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49603 conditions, 9791 events. 1864/9791 cut-off events. For 174955/175607 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 125621 event pairs, 76 based on Foata normal form. 92/9113 useless extension candidates. Maximal degree in co-relation 49517. Up to 2413 conditions per place. [2022-07-12 10:40:32,918 INFO L132 encePairwiseOnDemand]: 91/120 looper letters, 538 selfloop transitions, 339 changer transitions 65/990 dead transitions. [2022-07-12 10:40:32,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 990 transitions, 19122 flow [2022-07-12 10:40:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 10:40:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-12 10:40:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2915 transitions. [2022-07-12 10:40:32,922 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5168439716312057 [2022-07-12 10:40:32,922 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2915 transitions. [2022-07-12 10:40:32,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2915 transitions. [2022-07-12 10:40:32,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:32,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2915 transitions. [2022-07-12 10:40:32,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 62.02127659574468) internal successors, (2915), 47 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:32,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:32,933 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 120.0) internal successors, (5760), 48 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:32,933 INFO L186 Difference]: Start difference. First operand has 331 places, 624 transitions, 10240 flow. Second operand 47 states and 2915 transitions. [2022-07-12 10:40:32,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 990 transitions, 19122 flow [2022-07-12 10:40:33,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 990 transitions, 18236 flow, removed 388 selfloop flow, removed 32 redundant places. [2022-07-12 10:40:33,725 INFO L242 Difference]: Finished difference. Result has 363 places, 849 transitions, 15638 flow [2022-07-12 10:40:33,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9769, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15638, PETRI_PLACES=363, PETRI_TRANSITIONS=849} [2022-07-12 10:40:33,727 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 256 predicate places. [2022-07-12 10:40:33,727 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 849 transitions, 15638 flow [2022-07-12 10:40:33,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.5) internal successors, (1875), 30 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:33,727 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:33,728 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:40:33,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 10:40:33,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 10:40:33,952 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:33,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1652157435, now seen corresponding path program 10 times [2022-07-12 10:40:33,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:33,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589707252] [2022-07-12 10:40:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:33,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:34,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:34,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589707252] [2022-07-12 10:40:34,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589707252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:34,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131117182] [2022-07-12 10:40:34,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:40:34,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:34,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:34,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:40:34,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:40:34,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:34,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 10:40:34,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:35,033 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-12 10:40:35,034 INFO L390 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 23 treesize of output 10 [2022-07-12 10:40:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:35,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:35,124 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 10:40:35,124 INFO L390 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 17 [2022-07-12 10:40:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:35,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131117182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:35,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:35,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 45 [2022-07-12 10:40:35,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492831490] [2022-07-12 10:40:35,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:35,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-12 10:40:35,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-12 10:40:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 10:40:35,637 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-12 10:40:35,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 849 transitions, 15638 flow. Second operand has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:35,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:35,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-12 10:40:35,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:43,917 INFO L129 PetriNetUnfolder]: 3300/16834 cut-off events. [2022-07-12 10:40:43,918 INFO L130 PetriNetUnfolder]: For 465858/466988 co-relation queries the response was YES. [2022-07-12 10:40:44,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101923 conditions, 16834 events. 3300/16834 cut-off events. For 465858/466988 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 231849 event pairs, 12 based on Foata normal form. 308/15862 useless extension candidates. Maximal degree in co-relation 101821. Up to 2711 conditions per place. [2022-07-12 10:40:44,243 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 621 selfloop transitions, 877 changer transitions 114/1660 dead transitions. [2022-07-12 10:40:44,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1660 transitions, 37553 flow [2022-07-12 10:40:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-12 10:40:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-12 10:40:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4404 transitions. [2022-07-12 10:40:44,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5242857142857142 [2022-07-12 10:40:44,254 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4404 transitions. [2022-07-12 10:40:44,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4404 transitions. [2022-07-12 10:40:44,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:44,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4404 transitions. [2022-07-12 10:40:44,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 62.91428571428571) internal successors, (4404), 70 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:44,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 120.0) internal successors, (8520), 71 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:44,281 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 120.0) internal successors, (8520), 71 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:44,282 INFO L186 Difference]: Start difference. First operand has 363 places, 849 transitions, 15638 flow. Second operand 70 states and 4404 transitions. [2022-07-12 10:40:44,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1660 transitions, 37553 flow [2022-07-12 10:40:46,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1660 transitions, 36524 flow, removed 487 selfloop flow, removed 27 redundant places. [2022-07-12 10:40:46,590 INFO L242 Difference]: Finished difference. Result has 430 places, 1244 transitions, 27398 flow [2022-07-12 10:40:46,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=15291, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=27398, PETRI_PLACES=430, PETRI_TRANSITIONS=1244} [2022-07-12 10:40:46,591 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 323 predicate places. [2022-07-12 10:40:46,591 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1244 transitions, 27398 flow [2022-07-12 10:40:46,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.15555555555556) internal successors, (2752), 45 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:46,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:40:46,592 INFO L200 CegarLoopForPetriNet]: trace histogram [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] [2022-07-12 10:40:46,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-12 10:40:46,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 10:40:46,793 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:40:46,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:40:46,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1495727277, now seen corresponding path program 11 times [2022-07-12 10:40:46,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:40:46,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232125655] [2022-07-12 10:40:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:40:46,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:40:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:40:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:40:47,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:40:47,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232125655] [2022-07-12 10:40:47,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232125655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:40:47,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516472425] [2022-07-12 10:40:47,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:40:47,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:40:47,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:40:47,257 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:40:47,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:40:47,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 10:40:47,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:40:47,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 10:40:47,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:40:47,343 INFO L390 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 [2022-07-12 10:40:47,421 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:40:47,421 INFO L390 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 [2022-07-12 10:40:47,716 INFO L390 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 [2022-07-12 10:40:47,868 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-12 10:40:47,868 INFO L390 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 23 treesize of output 10 [2022-07-12 10:40:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:40:47,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:40:47,955 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_342 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_342) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-12 10:40:47,967 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:40:47,968 INFO L390 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 44 treesize of output 44 [2022-07-12 10:40:47,970 INFO L390 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 14 treesize of output 7 [2022-07-12 10:40:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:40:48,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516472425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:40:48,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:40:48,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 16] total 39 [2022-07-12 10:40:48,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340575192] [2022-07-12 10:40:48,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:40:48,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-12 10:40:48,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:40:48,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-12 10:40:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1304, Unknown=1, NotChecked=72, Total=1482 [2022-07-12 10:40:48,397 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 120 [2022-07-12 10:40:48,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1244 transitions, 27398 flow. Second operand has 39 states, 39 states have (on average 53.282051282051285) internal successors, (2078), 39 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:48,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:40:48,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 120 [2022-07-12 10:40:48,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:40:57,002 INFO L129 PetriNetUnfolder]: 3683/18623 cut-off events. [2022-07-12 10:40:57,002 INFO L130 PetriNetUnfolder]: For 574379/575886 co-relation queries the response was YES. [2022-07-12 10:40:57,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119929 conditions, 18623 events. 3683/18623 cut-off events. For 574379/575886 co-relation queries the response was YES. Maximal size of possible extension queue 1082. Compared 261848 event pairs, 289 based on Foata normal form. 187/17340 useless extension candidates. Maximal degree in co-relation 119798. Up to 6830 conditions per place. [2022-07-12 10:40:57,633 INFO L132 encePairwiseOnDemand]: 93/120 looper letters, 1172 selfloop transitions, 262 changer transitions 30/1507 dead transitions. [2022-07-12 10:40:57,633 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1507 transitions, 36498 flow [2022-07-12 10:40:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 10:40:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-12 10:40:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2059 transitions. [2022-07-12 10:40:57,636 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45153508771929823 [2022-07-12 10:40:57,637 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2059 transitions. [2022-07-12 10:40:57,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2059 transitions. [2022-07-12 10:40:57,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:40:57,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2059 transitions. [2022-07-12 10:40:57,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 54.18421052631579) internal successors, (2059), 38 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:57,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:57,647 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 120.0) internal successors, (4680), 39 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:40:57,648 INFO L186 Difference]: Start difference. First operand has 430 places, 1244 transitions, 27398 flow. Second operand 38 states and 2059 transitions. [2022-07-12 10:40:57,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1507 transitions, 36498 flow [2022-07-12 10:41:00,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1507 transitions, 35356 flow, removed 509 selfloop flow, removed 38 redundant places. [2022-07-12 10:41:00,380 INFO L242 Difference]: Finished difference. Result has 425 places, 1369 transitions, 30467 flow [2022-07-12 10:41:00,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=26475, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=984, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=30467, PETRI_PLACES=425, PETRI_TRANSITIONS=1369} [2022-07-12 10:41:00,382 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 318 predicate places. [2022-07-12 10:41:00,382 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 1369 transitions, 30467 flow [2022-07-12 10:41:00,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 53.282051282051285) internal successors, (2078), 39 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:00,382 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:00,382 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-07-12 10:41:00,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:00,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 10:41:00,584 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:00,612 INFO L85 PathProgramCache]: Analyzing trace with hash 730214897, now seen corresponding path program 12 times [2022-07-12 10:41:00,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:00,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587382678] [2022-07-12 10:41:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:00,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:41:00,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:00,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587382678] [2022-07-12 10:41:00,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587382678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:00,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374421893] [2022-07-12 10:41:00,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:41:00,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:00,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:00,720 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:00,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 10:41:00,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 10:41:00,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 10:41:00,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:41:01,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 10:41:01,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374421893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:01,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:01,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-07-12 10:41:01,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042301596] [2022-07-12 10:41:01,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:01,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 10:41:01,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 10:41:01,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-07-12 10:41:01,377 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 120 [2022-07-12 10:41:01,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 1369 transitions, 30467 flow. Second operand has 29 states, 29 states have (on average 92.3103448275862) internal successors, (2677), 29 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:01,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:01,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 120 [2022-07-12 10:41:01,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:03,549 INFO L129 PetriNetUnfolder]: 827/5656 cut-off events. [2022-07-12 10:41:03,550 INFO L130 PetriNetUnfolder]: For 163954/164737 co-relation queries the response was YES. [2022-07-12 10:41:03,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32221 conditions, 5656 events. 827/5656 cut-off events. For 163954/164737 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 68952 event pairs, 84 based on Foata normal form. 157/5287 useless extension candidates. Maximal degree in co-relation 32094. Up to 1241 conditions per place. [2022-07-12 10:41:03,617 INFO L132 encePairwiseOnDemand]: 109/120 looper letters, 396 selfloop transitions, 23 changer transitions 19/550 dead transitions. [2022-07-12 10:41:03,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 550 transitions, 11756 flow [2022-07-12 10:41:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 10:41:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-12 10:41:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1493 transitions. [2022-07-12 10:41:03,619 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7776041666666667 [2022-07-12 10:41:03,619 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1493 transitions. [2022-07-12 10:41:03,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1493 transitions. [2022-07-12 10:41:03,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:03,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1493 transitions. [2022-07-12 10:41:03,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 93.3125) internal successors, (1493), 16 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:03,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 120.0) internal successors, (2040), 17 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:03,622 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 120.0) internal successors, (2040), 17 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:03,622 INFO L186 Difference]: Start difference. First operand has 425 places, 1369 transitions, 30467 flow. Second operand 16 states and 1493 transitions. [2022-07-12 10:41:03,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 550 transitions, 11756 flow [2022-07-12 10:41:04,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 550 transitions, 10827 flow, removed 260 selfloop flow, removed 64 redundant places. [2022-07-12 10:41:04,184 INFO L242 Difference]: Finished difference. Result has 345 places, 517 transitions, 9316 flow [2022-07-12 10:41:04,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=9536, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9316, PETRI_PLACES=345, PETRI_TRANSITIONS=517} [2022-07-12 10:41:04,185 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 238 predicate places. [2022-07-12 10:41:04,185 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 517 transitions, 9316 flow [2022-07-12 10:41:04,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 92.3103448275862) internal successors, (2677), 29 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:04,186 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:04,186 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-07-12 10:41:04,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:04,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 10:41:04,392 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash -87345653, now seen corresponding path program 13 times [2022-07-12 10:41:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:04,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586080559] [2022-07-12 10:41:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:04,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 10:41:04,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586080559] [2022-07-12 10:41:04,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586080559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327936726] [2022-07-12 10:41:04,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 10:41:04,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:04,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:04,472 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:04,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 10:41:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 10:41:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:04,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:05,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327936726] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:05,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:05,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 14] total 29 [2022-07-12 10:41:05,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82713603] [2022-07-12 10:41:05,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:05,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 10:41:05,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 10:41:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-07-12 10:41:05,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 120 [2022-07-12 10:41:05,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 517 transitions, 9316 flow. Second operand has 29 states, 29 states have (on average 90.72413793103448) internal successors, (2631), 29 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:05,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:05,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 120 [2022-07-12 10:41:05,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:07,184 INFO L129 PetriNetUnfolder]: 796/6156 cut-off events. [2022-07-12 10:41:07,185 INFO L130 PetriNetUnfolder]: For 143453/144327 co-relation queries the response was YES. [2022-07-12 10:41:07,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31740 conditions, 6156 events. 796/6156 cut-off events. For 143453/144327 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 77082 event pairs, 85 based on Foata normal form. 378/5979 useless extension candidates. Maximal degree in co-relation 31641. Up to 888 conditions per place. [2022-07-12 10:41:07,244 INFO L132 encePairwiseOnDemand]: 105/120 looper letters, 164 selfloop transitions, 189 changer transitions 115/559 dead transitions. [2022-07-12 10:41:07,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 559 transitions, 11473 flow [2022-07-12 10:41:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 10:41:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-07-12 10:41:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2276 transitions. [2022-07-12 10:41:07,247 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7586666666666667 [2022-07-12 10:41:07,248 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2276 transitions. [2022-07-12 10:41:07,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2276 transitions. [2022-07-12 10:41:07,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:07,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2276 transitions. [2022-07-12 10:41:07,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 91.04) internal successors, (2276), 25 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:07,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 120.0) internal successors, (3120), 26 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:07,254 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 120.0) internal successors, (3120), 26 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:07,254 INFO L186 Difference]: Start difference. First operand has 345 places, 517 transitions, 9316 flow. Second operand 25 states and 2276 transitions. [2022-07-12 10:41:07,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 559 transitions, 11473 flow [2022-07-12 10:41:07,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 559 transitions, 11234 flow, removed 49 selfloop flow, removed 22 redundant places. [2022-07-12 10:41:07,721 INFO L242 Difference]: Finished difference. Result has 346 places, 424 transitions, 8648 flow [2022-07-12 10:41:07,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=7876, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8648, PETRI_PLACES=346, PETRI_TRANSITIONS=424} [2022-07-12 10:41:07,722 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 239 predicate places. [2022-07-12 10:41:07,722 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 424 transitions, 8648 flow [2022-07-12 10:41:07,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.72413793103448) internal successors, (2631), 29 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:07,723 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:07,723 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:41:07,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:07,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 10:41:07,932 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash -78433764, now seen corresponding path program 14 times [2022-07-12 10:41:07,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:07,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354913203] [2022-07-12 10:41:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:08,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:08,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354913203] [2022-07-12 10:41:08,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354913203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:08,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208679564] [2022-07-12 10:41:08,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:41:08,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:08,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:08,877 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:08,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 10:41:08,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 10:41:08,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-12 10:41:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:41:09,822 INFO L390 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 [2022-07-12 10:41:09,914 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-12 10:41:09,914 INFO L390 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 [2022-07-12 10:41:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:09,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:09,989 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_431 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_431) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))) 5)) is different from false [2022-07-12 10:41:10,056 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:41:10,059 INFO L390 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 42 treesize of output 42 [2022-07-12 10:41:10,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-12 10:41:11,145 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:11,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208679564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:11,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:11,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-07-12 10:41:11,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114369681] [2022-07-12 10:41:11,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:11,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-12 10:41:11,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:11,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-12 10:41:11,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=3489, Unknown=4, NotChecked=120, Total=3906 [2022-07-12 10:41:11,150 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-07-12 10:41:11,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 424 transitions, 8648 flow. Second operand has 63 states, 63 states have (on average 55.523809523809526) internal successors, (3498), 63 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:11,151 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:11,151 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-07-12 10:41:11,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:17,685 INFO L129 PetriNetUnfolder]: 1595/10117 cut-off events. [2022-07-12 10:41:17,685 INFO L130 PetriNetUnfolder]: For 258183/258915 co-relation queries the response was YES. [2022-07-12 10:41:17,780 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58801 conditions, 10117 events. 1595/10117 cut-off events. For 258183/258915 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 136960 event pairs, 80 based on Foata normal form. 198/9454 useless extension candidates. Maximal degree in co-relation 58704. Up to 2097 conditions per place. [2022-07-12 10:41:17,829 INFO L132 encePairwiseOnDemand]: 92/120 looper letters, 459 selfloop transitions, 368 changer transitions 75/947 dead transitions. [2022-07-12 10:41:17,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 947 transitions, 23371 flow [2022-07-12 10:41:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 10:41:17,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-12 10:41:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3428 transitions. [2022-07-12 10:41:17,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4761111111111111 [2022-07-12 10:41:17,833 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3428 transitions. [2022-07-12 10:41:17,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3428 transitions. [2022-07-12 10:41:17,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:17,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3428 transitions. [2022-07-12 10:41:17,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.13333333333333) internal successors, (3428), 60 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,845 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:17,845 INFO L186 Difference]: Start difference. First operand has 346 places, 424 transitions, 8648 flow. Second operand 60 states and 3428 transitions. [2022-07-12 10:41:17,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 947 transitions, 23371 flow [2022-07-12 10:41:18,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 947 transitions, 21425 flow, removed 908 selfloop flow, removed 46 redundant places. [2022-07-12 10:41:18,914 INFO L242 Difference]: Finished difference. Result has 347 places, 738 transitions, 17704 flow [2022-07-12 10:41:18,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=8165, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=17704, PETRI_PLACES=347, PETRI_TRANSITIONS=738} [2022-07-12 10:41:18,915 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 240 predicate places. [2022-07-12 10:41:18,915 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 738 transitions, 17704 flow [2022-07-12 10:41:18,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 55.523809523809526) internal successors, (3498), 63 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:18,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:18,916 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:41:18,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:19,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 10:41:19,117 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash -102659002, now seen corresponding path program 15 times [2022-07-12 10:41:19,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:19,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802275739] [2022-07-12 10:41:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:19,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:20,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:20,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802275739] [2022-07-12 10:41:20,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802275739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:20,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696336721] [2022-07-12 10:41:20,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:41:20,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:20,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:20,037 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:20,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 10:41:20,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 10:41:20,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 10:41:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:20,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 10:41:20,609 INFO L390 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 [2022-07-12 10:41:20,648 INFO L390 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 [2022-07-12 10:41:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:41:20,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:20,685 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_464 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_464) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-07-12 10:41:20,704 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:41:20,704 INFO L390 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 42 treesize of output 42 [2022-07-12 10:41:20,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-12 10:41:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 4 not checked. [2022-07-12 10:41:21,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696336721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:21,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:21,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 41 [2022-07-12 10:41:21,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707931030] [2022-07-12 10:41:21,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:21,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 10:41:21,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:21,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 10:41:21,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1451, Unknown=1, NotChecked=76, Total=1640 [2022-07-12 10:41:21,037 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 120 [2022-07-12 10:41:21,038 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 738 transitions, 17704 flow. Second operand has 41 states, 41 states have (on average 56.390243902439025) internal successors, (2312), 41 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:21,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:21,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 120 [2022-07-12 10:41:21,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:26,021 INFO L129 PetriNetUnfolder]: 1596/9925 cut-off events. [2022-07-12 10:41:26,021 INFO L130 PetriNetUnfolder]: For 228129/229163 co-relation queries the response was YES. [2022-07-12 10:41:26,112 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55756 conditions, 9925 events. 1596/9925 cut-off events. For 228129/229163 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 133271 event pairs, 156 based on Foata normal form. 206/9292 useless extension candidates. Maximal degree in co-relation 55648. Up to 3464 conditions per place. [2022-07-12 10:41:26,146 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 600 selfloop transitions, 192 changer transitions 23/860 dead transitions. [2022-07-12 10:41:26,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 860 transitions, 22147 flow [2022-07-12 10:41:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 10:41:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-07-12 10:41:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2431 transitions. [2022-07-12 10:41:26,149 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.47112403100775196 [2022-07-12 10:41:26,149 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2431 transitions. [2022-07-12 10:41:26,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2431 transitions. [2022-07-12 10:41:26,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:26,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2431 transitions. [2022-07-12 10:41:26,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 56.53488372093023) internal successors, (2431), 43 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,157 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 120.0) internal successors, (5280), 44 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:26,157 INFO L186 Difference]: Start difference. First operand has 347 places, 738 transitions, 17704 flow. Second operand 43 states and 2431 transitions. [2022-07-12 10:41:26,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 860 transitions, 22147 flow [2022-07-12 10:41:27,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 860 transitions, 21256 flow, removed 422 selfloop flow, removed 30 redundant places. [2022-07-12 10:41:27,198 INFO L242 Difference]: Finished difference. Result has 355 places, 806 transitions, 19492 flow [2022-07-12 10:41:27,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=16875, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=19492, PETRI_PLACES=355, PETRI_TRANSITIONS=806} [2022-07-12 10:41:27,200 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 248 predicate places. [2022-07-12 10:41:27,200 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 806 transitions, 19492 flow [2022-07-12 10:41:27,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.390243902439025) internal successors, (2312), 41 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:27,200 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:27,201 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:41:27,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:27,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:27,426 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:27,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1102779316, now seen corresponding path program 16 times [2022-07-12 10:41:27,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:27,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141574271] [2022-07-12 10:41:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:27,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:28,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:28,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141574271] [2022-07-12 10:41:28,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141574271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:28,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354353362] [2022-07-12 10:41:28,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 10:41:28,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:28,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:28,028 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:28,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 10:41:28,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 10:41:28,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-12 10:41:28,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:28,116 INFO L390 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 [2022-07-12 10:41:28,292 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:41:28,292 INFO L390 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 [2022-07-12 10:41:29,084 INFO L390 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 [2022-07-12 10:41:29,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 10:41:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:29,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:29,471 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:41:29,471 INFO L390 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 42 treesize of output 42 [2022-07-12 10:41:29,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-07-12 10:41:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:30,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354353362] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:30,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:30,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 68 [2022-07-12 10:41:30,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672905236] [2022-07-12 10:41:30,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:30,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-12 10:41:30,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-12 10:41:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=4133, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 10:41:30,577 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-12 10:41:30,579 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 806 transitions, 19492 flow. Second operand has 68 states, 68 states have (on average 51.5) internal successors, (3502), 68 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:30,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:30,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-12 10:41:30,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:41,077 INFO L129 PetriNetUnfolder]: 2723/16382 cut-off events. [2022-07-12 10:41:41,077 INFO L130 PetriNetUnfolder]: For 377159/378448 co-relation queries the response was YES. [2022-07-12 10:41:41,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90372 conditions, 16382 events. 2723/16382 cut-off events. For 377159/378448 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 238058 event pairs, 121 based on Foata normal form. 461/15466 useless extension candidates. Maximal degree in co-relation 90268. Up to 2713 conditions per place. [2022-07-12 10:41:41,306 INFO L132 encePairwiseOnDemand]: 90/120 looper letters, 734 selfloop transitions, 616 changer transitions 103/1495 dead transitions. [2022-07-12 10:41:41,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1495 transitions, 38525 flow [2022-07-12 10:41:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-12 10:41:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-07-12 10:41:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4301 transitions. [2022-07-12 10:41:41,311 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44248971193415637 [2022-07-12 10:41:41,311 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4301 transitions. [2022-07-12 10:41:41,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4301 transitions. [2022-07-12 10:41:41,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:41,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4301 transitions. [2022-07-12 10:41:41,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 53.098765432098766) internal successors, (4301), 81 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:41,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 120.0) internal successors, (9840), 82 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:41,325 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 120.0) internal successors, (9840), 82 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:41,325 INFO L186 Difference]: Start difference. First operand has 355 places, 806 transitions, 19492 flow. Second operand 81 states and 4301 transitions. [2022-07-12 10:41:41,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1495 transitions, 38525 flow [2022-07-12 10:41:42,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1495 transitions, 38150 flow, removed 148 selfloop flow, removed 30 redundant places. [2022-07-12 10:41:42,945 INFO L242 Difference]: Finished difference. Result has 447 places, 1087 transitions, 29578 flow [2022-07-12 10:41:42,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=19279, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=29578, PETRI_PLACES=447, PETRI_TRANSITIONS=1087} [2022-07-12 10:41:42,946 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 340 predicate places. [2022-07-12 10:41:42,947 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1087 transitions, 29578 flow [2022-07-12 10:41:42,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 51.5) internal successors, (3502), 68 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:42,947 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:42,948 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:41:42,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:43,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:43,173 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:43,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash 458708590, now seen corresponding path program 17 times [2022-07-12 10:41:43,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:43,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428117815] [2022-07-12 10:41:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:43,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:43,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428117815] [2022-07-12 10:41:43,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428117815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965369687] [2022-07-12 10:41:43,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 10:41:43,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:43,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:43,835 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:43,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 10:41:43,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 10:41:43,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:41:43,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 10:41:43,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:41:43,931 INFO L390 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 [2022-07-12 10:41:44,015 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:41:44,016 INFO L390 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 [2022-07-12 10:41:44,309 INFO L390 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 [2022-07-12 10:41:44,375 INFO L390 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 [2022-07-12 10:41:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 10:41:44,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:41:44,433 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_532 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_532) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-07-12 10:41:44,446 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 10:41:44,447 INFO L390 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 44 treesize of output 44 [2022-07-12 10:41:44,450 INFO L390 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 14 treesize of output 7 [2022-07-12 10:41:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-12 10:41:44,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965369687] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:41:44,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:41:44,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 16] total 43 [2022-07-12 10:41:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222402137] [2022-07-12 10:41:44,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:41:44,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 10:41:44,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:41:44,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 10:41:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1605, Unknown=1, NotChecked=80, Total=1806 [2022-07-12 10:41:44,769 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 120 [2022-07-12 10:41:44,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1087 transitions, 29578 flow. Second operand has 43 states, 43 states have (on average 52.2093023255814) internal successors, (2245), 43 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:44,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:41:44,770 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 120 [2022-07-12 10:41:44,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:41:55,214 INFO L129 PetriNetUnfolder]: 3628/21792 cut-off events. [2022-07-12 10:41:55,215 INFO L130 PetriNetUnfolder]: For 670482/672384 co-relation queries the response was YES. [2022-07-12 10:41:55,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134037 conditions, 21792 events. 3628/21792 cut-off events. For 670482/672384 co-relation queries the response was YES. Maximal size of possible extension queue 1393. Compared 330613 event pairs, 119 based on Foata normal form. 561/20544 useless extension candidates. Maximal degree in co-relation 133890. Up to 3788 conditions per place. [2022-07-12 10:41:55,933 INFO L132 encePairwiseOnDemand]: 94/120 looper letters, 996 selfloop transitions, 635 changer transitions 76/1749 dead transitions. [2022-07-12 10:41:55,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1749 transitions, 49876 flow [2022-07-12 10:41:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 10:41:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-07-12 10:41:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3172 transitions. [2022-07-12 10:41:55,936 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.44055555555555553 [2022-07-12 10:41:55,936 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3172 transitions. [2022-07-12 10:41:55,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3172 transitions. [2022-07-12 10:41:55,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:41:55,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3172 transitions. [2022-07-12 10:41:55,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.86666666666667) internal successors, (3172), 60 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:55,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:55,949 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:55,950 INFO L186 Difference]: Start difference. First operand has 447 places, 1087 transitions, 29578 flow. Second operand 60 states and 3172 transitions. [2022-07-12 10:41:55,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1749 transitions, 49876 flow [2022-07-12 10:41:59,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1749 transitions, 47648 flow, removed 1069 selfloop flow, removed 55 redundant places. [2022-07-12 10:41:59,202 INFO L242 Difference]: Finished difference. Result has 454 places, 1336 transitions, 38424 flow [2022-07-12 10:41:59,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=28350, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=38424, PETRI_PLACES=454, PETRI_TRANSITIONS=1336} [2022-07-12 10:41:59,203 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 347 predicate places. [2022-07-12 10:41:59,203 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1336 transitions, 38424 flow [2022-07-12 10:41:59,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 52.2093023255814) internal successors, (2245), 43 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:41:59,204 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:41:59,204 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-12 10:41:59,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 10:41:59,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:59,405 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:41:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:41:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash -326418292, now seen corresponding path program 18 times [2022-07-12 10:41:59,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:41:59,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716453769] [2022-07-12 10:41:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:41:59,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:41:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:41:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:41:59,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:41:59,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716453769] [2022-07-12 10:41:59,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716453769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:41:59,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393847621] [2022-07-12 10:41:59,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 10:41:59,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:41:59,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:41:59,950 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 10:41:59,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 10:42:00,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 10:42:00,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:42:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 10:42:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:42:00,985 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-12 10:42:00,985 INFO L390 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 23 treesize of output 10 [2022-07-12 10:42:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:00,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:42:01,118 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-12 10:42:01,118 INFO L390 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 17 [2022-07-12 10:42:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:42:02,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393847621] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:42:02,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:42:02,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 54 [2022-07-12 10:42:02,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490766678] [2022-07-12 10:42:02,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:42:02,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 10:42:02,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:42:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 10:42:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2523, Unknown=0, NotChecked=0, Total=2862 [2022-07-12 10:42:02,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 120 [2022-07-12 10:42:02,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1336 transitions, 38424 flow. Second operand has 54 states, 54 states have (on average 61.0) internal successors, (3294), 54 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:42:02,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:42:02,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 120 [2022-07-12 10:42:02,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand