./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-bad-buffer-mult-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:09:09,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:09:09,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:09:09,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:09:09,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:09:09,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:09:09,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:09:09,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:09:09,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:09:09,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:09:09,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:09:09,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:09:09,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:09:09,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:09:09,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:09:09,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:09:09,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:09:09,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:09:09,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:09:09,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:09:09,752 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:09:09,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:09:09,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:09:09,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:09:09,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:09:09,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:09:09,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:09:09,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:09:09,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:09:09,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:09:09,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:09:09,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:09:09,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:09:09,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:09:09,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:09:09,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:09:09,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:09:09,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:09:09,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:09:09,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:09:09,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:09:09,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:09:09,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:09:09,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:09:09,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:09:09,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:09:09,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:09:09,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:09:09,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:09:09,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:09:09,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:09:09,801 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:09:09,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:09:09,802 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:09:09,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:09:09,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:09:09,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:09:09,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:09:09,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:09:09,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:09:09,804 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:09:09,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:09:09,804 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:09:09,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:09:09,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:09:09,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:09:09,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:09:09,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:09:09,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:09:09,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:09:09,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:09:09,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:09:09,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:09:09,806 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:09:09,806 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:09:09,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:09:09,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-07-13 22:09:10,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:09:10,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:09:10,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:09:10,103 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:09:10,104 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:09:10,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-07-13 22:09:10,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0fa1aef7/aa4eb2d2bc664059b3fd81ed1f1b7f3e/FLAG804fa208b [2022-07-13 22:09:10,505 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:09:10,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-07-13 22:09:10,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0fa1aef7/aa4eb2d2bc664059b3fd81ed1f1b7f3e/FLAG804fa208b [2022-07-13 22:09:10,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0fa1aef7/aa4eb2d2bc664059b3fd81ed1f1b7f3e [2022-07-13 22:09:10,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:09:10,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:09:10,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:09:10,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:09:10,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:09:10,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:10" (1/1) ... [2022-07-13 22:09:10,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bcf002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:10, skipping insertion in model container [2022-07-13 22:09:10,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:10" (1/1) ... [2022-07-13 22:09:10,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:09:10,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:09:11,138 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-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-07-13 22:09:11,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:09:11,152 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:09:11,183 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-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-07-13 22:09:11,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:09:11,200 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:09:11,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11 WrapperNode [2022-07-13 22:09:11,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:09:11,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:09:11,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:09:11,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:09:11,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,246 INFO L137 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2022-07-13 22:09:11,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:09:11,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:09:11,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:09:11,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:09:11,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:09:11,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:09:11,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:09:11,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:09:11,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (1/1) ... [2022-07-13 22:09:11,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:09:11,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:11,313 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) [2022-07-13 22:09:11,335 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 [2022-07-13 22:09:11,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:09:11,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:09:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:09:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:09:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:09:11,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:09:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:09:11,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:09:11,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:09:11,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:09:11,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-07-13 22:09:11,356 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-07-13 22:09:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:09:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:09:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:09:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:09:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:09:11,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:09:11,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:09:11,358 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:09:11,463 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:09:11,467 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:09:11,855 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:09:12,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:09:12,108 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-13 22:09:12,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:12 BoogieIcfgContainer [2022-07-13 22:09:12,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:09:12,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:09:12,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:09:12,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:09:12,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:09:10" (1/3) ... [2022-07-13 22:09:12,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cc8b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:12, skipping insertion in model container [2022-07-13 22:09:12,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:11" (2/3) ... [2022-07-13 22:09:12,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cc8b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:12, skipping insertion in model container [2022-07-13 22:09:12,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:12" (3/3) ... [2022-07-13 22:09:12,122 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2022-07-13 22:09:12,131 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:09:12,140 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:09:12,140 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:09:12,140 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:09:12,245 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-13 22:09:12,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 241 places, 247 transitions, 526 flow [2022-07-13 22:09:12,384 INFO L129 PetriNetUnfolder]: 19/243 cut-off events. [2022-07-13 22:09:12,392 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:09:12,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 243 events. 19/243 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 204. Up to 2 conditions per place. [2022-07-13 22:09:12,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 247 transitions, 526 flow [2022-07-13 22:09:12,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 230 transitions, 484 flow [2022-07-13 22:09:12,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:09:12,432 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@11ffe118, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@558fab75 [2022-07-13 22:09:12,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-13 22:09:12,471 INFO L129 PetriNetUnfolder]: 19/229 cut-off events. [2022-07-13 22:09:12,472 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-13 22:09:12,472 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:12,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:12,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:12,478 INFO L85 PathProgramCache]: Analyzing trace with hash -22342228, now seen corresponding path program 1 times [2022-07-13 22:09:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:12,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641188903] [2022-07-13 22:09:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:12,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:12,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:12,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641188903] [2022-07-13 22:09:12,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641188903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:12,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:12,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:09:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101643620] [2022-07-13 22:09:12,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:12,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:09:12,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:12,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:09:12,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:09:12,787 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 247 [2022-07-13 22:09:12,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 230 transitions, 484 flow. Second operand has 2 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:12,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:12,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 247 [2022-07-13 22:09:12,795 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:13,033 INFO L129 PetriNetUnfolder]: 226/768 cut-off events. [2022-07-13 22:09:13,034 INFO L130 PetriNetUnfolder]: For 146/147 co-relation queries the response was YES. [2022-07-13 22:09:13,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 768 events. 226/768 cut-off events. For 146/147 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3364 event pairs, 121 based on Foata normal form. 198/879 useless extension candidates. Maximal degree in co-relation 906. Up to 306 conditions per place. [2022-07-13 22:09:13,047 INFO L132 encePairwiseOnDemand]: 234/247 looper letters, 14 selfloop transitions, 0 changer transitions 7/217 dead transitions. [2022-07-13 22:09:13,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 217 transitions, 486 flow [2022-07-13 22:09:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:09:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:09:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 465 transitions. [2022-07-13 22:09:13,068 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9412955465587044 [2022-07-13 22:09:13,070 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 465 transitions. [2022-07-13 22:09:13,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 465 transitions. [2022-07-13 22:09:13,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:13,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 465 transitions. [2022-07-13 22:09:13,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:13,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:13,089 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:13,090 INFO L186 Difference]: Start difference. First operand has 224 places, 230 transitions, 484 flow. Second operand 2 states and 465 transitions. [2022-07-13 22:09:13,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 217 transitions, 486 flow [2022-07-13 22:09:13,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 217 transitions, 470 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-07-13 22:09:13,101 INFO L242 Difference]: Finished difference. Result has 217 places, 210 transitions, 428 flow [2022-07-13 22:09:13,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=428, PETRI_PLACES=217, PETRI_TRANSITIONS=210} [2022-07-13 22:09:13,108 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-07-13 22:09:13,109 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 210 transitions, 428 flow [2022-07-13 22:09:13,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 225.0) internal successors, (450), 2 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:13,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:13,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:13,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:09:13,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1261302060, now seen corresponding path program 1 times [2022-07-13 22:09:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:13,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857146810] [2022-07-13 22:09:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:13,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:13,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:13,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857146810] [2022-07-13 22:09:13,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857146810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:13,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:13,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:09:13,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735656650] [2022-07-13 22:09:13,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:13,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:09:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:13,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:09:13,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:09:13,671 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 247 [2022-07-13 22:09:13,672 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 210 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:13,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:13,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 247 [2022-07-13 22:09:13,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:14,041 INFO L129 PetriNetUnfolder]: 768/1413 cut-off events. [2022-07-13 22:09:14,042 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-13 22:09:14,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1413 events. 768/1413 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6588 event pairs, 30 based on Foata normal form. 0/1324 useless extension candidates. Maximal degree in co-relation 2632. Up to 669 conditions per place. [2022-07-13 22:09:14,059 INFO L132 encePairwiseOnDemand]: 240/247 looper letters, 66 selfloop transitions, 6 changer transitions 0/231 dead transitions. [2022-07-13 22:09:14,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 231 transitions, 620 flow [2022-07-13 22:09:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:09:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:09:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1298 transitions. [2022-07-13 22:09:14,063 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7507229612492771 [2022-07-13 22:09:14,063 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1298 transitions. [2022-07-13 22:09:14,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1298 transitions. [2022-07-13 22:09:14,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:14,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1298 transitions. [2022-07-13 22:09:14,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.42857142857142) internal successors, (1298), 7 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:14,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 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) [2022-07-13 22:09:14,074 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 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) [2022-07-13 22:09:14,074 INFO L186 Difference]: Start difference. First operand has 217 places, 210 transitions, 428 flow. Second operand 7 states and 1298 transitions. [2022-07-13 22:09:14,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 231 transitions, 620 flow [2022-07-13 22:09:14,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 231 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:09:14,086 INFO L242 Difference]: Finished difference. Result has 217 places, 211 transitions, 448 flow [2022-07-13 22:09:14,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2022-07-13 22:09:14,088 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -7 predicate places. [2022-07-13 22:09:14,088 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 448 flow [2022-07-13 22:09:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.25) internal successors, (1442), 8 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:14,089 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:14,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:14,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:09:14,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:14,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1722981983, now seen corresponding path program 1 times [2022-07-13 22:09:14,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:14,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420362852] [2022-07-13 22:09:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:14,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:14,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:14,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420362852] [2022-07-13 22:09:14,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420362852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:14,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:14,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:09:14,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108970329] [2022-07-13 22:09:14,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:14,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:09:14,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:14,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:09:14,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:09:14,275 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-13 22:09:14,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 448 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:14,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:14,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-13 22:09:14,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:14,659 INFO L129 PetriNetUnfolder]: 1288/2417 cut-off events. [2022-07-13 22:09:14,659 INFO L130 PetriNetUnfolder]: For 342/342 co-relation queries the response was YES. [2022-07-13 22:09:14,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4671 conditions, 2417 events. 1288/2417 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14061 event pairs, 158 based on Foata normal form. 18/2250 useless extension candidates. Maximal degree in co-relation 4666. Up to 1064 conditions per place. [2022-07-13 22:09:14,680 INFO L132 encePairwiseOnDemand]: 242/247 looper letters, 58 selfloop transitions, 4 changer transitions 0/246 dead transitions. [2022-07-13 22:09:14,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 246 transitions, 675 flow [2022-07-13 22:09:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:09:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:09:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1095 transitions. [2022-07-13 22:09:14,684 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8866396761133604 [2022-07-13 22:09:14,684 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1095 transitions. [2022-07-13 22:09:14,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1095 transitions. [2022-07-13 22:09:14,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:14,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1095 transitions. [2022-07-13 22:09:14,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:14,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:14,690 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:14,690 INFO L186 Difference]: Start difference. First operand has 217 places, 211 transitions, 448 flow. Second operand 5 states and 1095 transitions. [2022-07-13 22:09:14,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 246 transitions, 675 flow [2022-07-13 22:09:14,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 246 transitions, 661 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-13 22:09:14,695 INFO L242 Difference]: Finished difference. Result has 218 places, 213 transitions, 463 flow [2022-07-13 22:09:14,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=463, PETRI_PLACES=218, PETRI_TRANSITIONS=213} [2022-07-13 22:09:14,696 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, -6 predicate places. [2022-07-13 22:09:14,697 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 213 transitions, 463 flow [2022-07-13 22:09:14,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:14,698 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:14,698 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:14,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:09:14,698 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash 273955145, now seen corresponding path program 2 times [2022-07-13 22:09:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:14,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232939000] [2022-07-13 22:09:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:14,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232939000] [2022-07-13 22:09:14,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232939000] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931116101] [2022-07-13 22:09:14,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:09:14,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:14,899 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) [2022-07-13 22:09:14,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:09:15,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:09:15,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:09:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 22:09:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:15,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:15,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931116101] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:15,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:09:15,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-13 22:09:15,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118344398] [2022-07-13 22:09:15,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:15,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:09:15,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:15,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:09:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:09:15,556 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 247 [2022-07-13 22:09:15,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 213 transitions, 463 flow. Second operand has 7 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:15,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:15,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 247 [2022-07-13 22:09:15,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:16,081 INFO L129 PetriNetUnfolder]: 1220/2724 cut-off events. [2022-07-13 22:09:16,081 INFO L130 PetriNetUnfolder]: For 609/609 co-relation queries the response was YES. [2022-07-13 22:09:16,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5058 conditions, 2724 events. 1220/2724 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17722 event pairs, 215 based on Foata normal form. 35/2572 useless extension candidates. Maximal degree in co-relation 5051. Up to 455 conditions per place. [2022-07-13 22:09:16,106 INFO L132 encePairwiseOnDemand]: 238/247 looper letters, 82 selfloop transitions, 10 changer transitions 0/254 dead transitions. [2022-07-13 22:09:16,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 254 transitions, 759 flow [2022-07-13 22:09:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:09:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:09:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1497 transitions. [2022-07-13 22:09:16,111 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7575910931174089 [2022-07-13 22:09:16,111 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1497 transitions. [2022-07-13 22:09:16,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1497 transitions. [2022-07-13 22:09:16,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:16,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1497 transitions. [2022-07-13 22:09:16,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:16,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:16,120 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:16,120 INFO L186 Difference]: Start difference. First operand has 218 places, 213 transitions, 463 flow. Second operand 8 states and 1497 transitions. [2022-07-13 22:09:16,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 254 transitions, 759 flow [2022-07-13 22:09:16,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 254 transitions, 753 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:09:16,127 INFO L242 Difference]: Finished difference. Result has 227 places, 220 transitions, 523 flow [2022-07-13 22:09:16,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=523, PETRI_PLACES=227, PETRI_TRANSITIONS=220} [2022-07-13 22:09:16,129 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 3 predicate places. [2022-07-13 22:09:16,129 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 220 transitions, 523 flow [2022-07-13 22:09:16,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.28571428571428) internal successors, (1276), 7 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:16,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:16,130 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:16,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:09:16,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:16,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:16,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1178444087, now seen corresponding path program 3 times [2022-07-13 22:09:16,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:16,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468233623] [2022-07-13 22:09:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:16,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:16,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:16,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468233623] [2022-07-13 22:09:16,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468233623] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:16,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:16,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:09:16,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534068793] [2022-07-13 22:09:16,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:16,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:09:16,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:16,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:09:16,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:09:16,564 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-13 22:09:16,565 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 220 transitions, 523 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:16,565 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:16,565 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-13 22:09:16,565 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:18,130 INFO L129 PetriNetUnfolder]: 4916/9783 cut-off events. [2022-07-13 22:09:18,130 INFO L130 PetriNetUnfolder]: For 4883/4900 co-relation queries the response was YES. [2022-07-13 22:09:18,175 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21837 conditions, 9783 events. 4916/9783 cut-off events. For 4883/4900 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 83346 event pairs, 906 based on Foata normal form. 80/9460 useless extension candidates. Maximal degree in co-relation 21826. Up to 2240 conditions per place. [2022-07-13 22:09:18,238 INFO L132 encePairwiseOnDemand]: 240/247 looper letters, 97 selfloop transitions, 26 changer transitions 0/307 dead transitions. [2022-07-13 22:09:18,239 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 307 transitions, 1136 flow [2022-07-13 22:09:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:09:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:09:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1537 transitions. [2022-07-13 22:09:18,243 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8889531521110469 [2022-07-13 22:09:18,243 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1537 transitions. [2022-07-13 22:09:18,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1537 transitions. [2022-07-13 22:09:18,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:18,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1537 transitions. [2022-07-13 22:09:18,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 219.57142857142858) internal successors, (1537), 7 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:18,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 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) [2022-07-13 22:09:18,250 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 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) [2022-07-13 22:09:18,250 INFO L186 Difference]: Start difference. First operand has 227 places, 220 transitions, 523 flow. Second operand 7 states and 1537 transitions. [2022-07-13 22:09:18,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 307 transitions, 1136 flow [2022-07-13 22:09:18,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 307 transitions, 1131 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 22:09:18,261 INFO L242 Difference]: Finished difference. Result has 235 places, 243 transitions, 746 flow [2022-07-13 22:09:18,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=746, PETRI_PLACES=235, PETRI_TRANSITIONS=243} [2022-07-13 22:09:18,262 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 11 predicate places. [2022-07-13 22:09:18,263 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 243 transitions, 746 flow [2022-07-13 22:09:18,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:18,263 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:18,264 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:18,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:09:18,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1298721201, now seen corresponding path program 4 times [2022-07-13 22:09:18,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:18,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639576110] [2022-07-13 22:09:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:18,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:18,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:18,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639576110] [2022-07-13 22:09:18,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639576110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420100533] [2022-07-13 22:09:18,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:09:18,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:18,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:18,480 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) [2022-07-13 22:09:18,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:09:18,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:09:18,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:09:18,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 22:09:18,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:18,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:09:18,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420100533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:18,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:09:18,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-07-13 22:09:18,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224517891] [2022-07-13 22:09:18,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:18,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:09:18,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:18,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:09:18,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:09:18,797 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 247 [2022-07-13 22:09:18,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 243 transitions, 746 flow. Second operand has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:18,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:18,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 247 [2022-07-13 22:09:18,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:19,765 INFO L129 PetriNetUnfolder]: 2037/5163 cut-off events. [2022-07-13 22:09:19,765 INFO L130 PetriNetUnfolder]: For 6534/7827 co-relation queries the response was YES. [2022-07-13 22:09:19,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13229 conditions, 5163 events. 2037/5163 cut-off events. For 6534/7827 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 42769 event pairs, 859 based on Foata normal form. 205/4999 useless extension candidates. Maximal degree in co-relation 13213. Up to 2472 conditions per place. [2022-07-13 22:09:19,833 INFO L132 encePairwiseOnDemand]: 236/247 looper letters, 44 selfloop transitions, 8 changer transitions 20/267 dead transitions. [2022-07-13 22:09:19,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 267 transitions, 942 flow [2022-07-13 22:09:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 22:09:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-13 22:09:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1803 transitions. [2022-07-13 22:09:19,838 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8110661268556005 [2022-07-13 22:09:19,838 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1803 transitions. [2022-07-13 22:09:19,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1803 transitions. [2022-07-13 22:09:19,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:19,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1803 transitions. [2022-07-13 22:09:19,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.33333333333334) internal successors, (1803), 9 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:19,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:19,848 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 247.0) internal successors, (2470), 10 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:19,848 INFO L186 Difference]: Start difference. First operand has 235 places, 243 transitions, 746 flow. Second operand 9 states and 1803 transitions. [2022-07-13 22:09:19,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 267 transitions, 942 flow [2022-07-13 22:09:19,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 267 transitions, 942 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:09:19,871 INFO L242 Difference]: Finished difference. Result has 245 places, 244 transitions, 778 flow [2022-07-13 22:09:19,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=245, PETRI_TRANSITIONS=244} [2022-07-13 22:09:19,872 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 21 predicate places. [2022-07-13 22:09:19,872 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 244 transitions, 778 flow [2022-07-13 22:09:19,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:19,873 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:19,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:19,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 22:09:20,087 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 [2022-07-13 22:09:20,088 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash -629110740, now seen corresponding path program 1 times [2022-07-13 22:09:20,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:20,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468670335] [2022-07-13 22:09:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:20,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:20,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:20,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468670335] [2022-07-13 22:09:20,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468670335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:20,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122268907] [2022-07-13 22:09:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:20,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:20,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:20,267 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) [2022-07-13 22:09:20,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:09:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:20,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 22:09:20,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:20,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:21,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122268907] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:09:21,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:09:21,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 10] total 19 [2022-07-13 22:09:21,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381257980] [2022-07-13 22:09:21,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:09:21,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:09:21,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:09:21,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:09:21,228 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 247 [2022-07-13 22:09:21,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 244 transitions, 778 flow. Second operand has 19 states, 19 states have (on average 177.57894736842104) internal successors, (3374), 19 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:21,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:21,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 247 [2022-07-13 22:09:21,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:25,056 INFO L129 PetriNetUnfolder]: 11735/23121 cut-off events. [2022-07-13 22:09:25,056 INFO L130 PetriNetUnfolder]: For 26101/26176 co-relation queries the response was YES. [2022-07-13 22:09:25,165 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58744 conditions, 23121 events. 11735/23121 cut-off events. For 26101/26176 co-relation queries the response was YES. Maximal size of possible extension queue 1427. Compared 224593 event pairs, 440 based on Foata normal form. 144/22012 useless extension candidates. Maximal degree in co-relation 58725. Up to 3349 conditions per place. [2022-07-13 22:09:25,379 INFO L132 encePairwiseOnDemand]: 234/247 looper letters, 292 selfloop transitions, 162 changer transitions 2/613 dead transitions. [2022-07-13 22:09:25,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 613 transitions, 3657 flow [2022-07-13 22:09:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 22:09:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-13 22:09:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4265 transitions. [2022-07-13 22:09:25,397 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7507481077275128 [2022-07-13 22:09:25,398 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4265 transitions. [2022-07-13 22:09:25,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4265 transitions. [2022-07-13 22:09:25,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:25,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4265 transitions. [2022-07-13 22:09:25,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 185.43478260869566) internal successors, (4265), 23 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:25,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:25,424 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 247.0) internal successors, (5928), 24 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:25,424 INFO L186 Difference]: Start difference. First operand has 245 places, 244 transitions, 778 flow. Second operand 23 states and 4265 transitions. [2022-07-13 22:09:25,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 613 transitions, 3657 flow [2022-07-13 22:09:25,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 613 transitions, 3621 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-07-13 22:09:25,487 INFO L242 Difference]: Finished difference. Result has 271 places, 419 transitions, 2567 flow [2022-07-13 22:09:25,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2567, PETRI_PLACES=271, PETRI_TRANSITIONS=419} [2022-07-13 22:09:25,488 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 47 predicate places. [2022-07-13 22:09:25,489 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 419 transitions, 2567 flow [2022-07-13 22:09:25,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 177.57894736842104) internal successors, (3374), 19 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:25,490 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:25,490 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:25,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:09:25,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:25,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:25,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1426988084, now seen corresponding path program 2 times [2022-07-13 22:09:25,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:25,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442279482] [2022-07-13 22:09:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:25,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:25,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:25,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442279482] [2022-07-13 22:09:25,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442279482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:25,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:25,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:09:25,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916030810] [2022-07-13 22:09:25,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:25,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:09:25,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:09:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:09:25,818 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 247 [2022-07-13 22:09:25,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 419 transitions, 2567 flow. Second operand has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:25,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:25,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 247 [2022-07-13 22:09:25,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:29,946 INFO L129 PetriNetUnfolder]: 14780/27656 cut-off events. [2022-07-13 22:09:29,946 INFO L130 PetriNetUnfolder]: For 75441/78029 co-relation queries the response was YES. [2022-07-13 22:09:30,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90985 conditions, 27656 events. 14780/27656 cut-off events. For 75441/78029 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 263958 event pairs, 1738 based on Foata normal form. 602/26876 useless extension candidates. Maximal degree in co-relation 90956. Up to 9395 conditions per place. [2022-07-13 22:09:30,407 INFO L132 encePairwiseOnDemand]: 239/247 looper letters, 285 selfloop transitions, 166 changer transitions 0/632 dead transitions. [2022-07-13 22:09:30,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 632 transitions, 5141 flow [2022-07-13 22:09:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:09:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:09:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1507 transitions. [2022-07-13 22:09:30,415 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.871602082128398 [2022-07-13 22:09:30,416 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1507 transitions. [2022-07-13 22:09:30,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1507 transitions. [2022-07-13 22:09:30,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:30,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1507 transitions. [2022-07-13 22:09:30,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 215.28571428571428) internal successors, (1507), 7 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:30,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 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) [2022-07-13 22:09:30,443 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 247.0) internal successors, (1976), 8 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) [2022-07-13 22:09:30,443 INFO L186 Difference]: Start difference. First operand has 271 places, 419 transitions, 2567 flow. Second operand 7 states and 1507 transitions. [2022-07-13 22:09:30,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 632 transitions, 5141 flow [2022-07-13 22:09:31,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 632 transitions, 5079 flow, removed 31 selfloop flow, removed 0 redundant places. [2022-07-13 22:09:31,190 INFO L242 Difference]: Finished difference. Result has 281 places, 493 transitions, 3898 flow [2022-07-13 22:09:31,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3898, PETRI_PLACES=281, PETRI_TRANSITIONS=493} [2022-07-13 22:09:31,192 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 57 predicate places. [2022-07-13 22:09:31,192 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 493 transitions, 3898 flow [2022-07-13 22:09:31,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:31,193 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:31,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:31,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:09:31,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1444538644, now seen corresponding path program 3 times [2022-07-13 22:09:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:31,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939785827] [2022-07-13 22:09:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:31,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:31,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939785827] [2022-07-13 22:09:31,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939785827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:31,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:31,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:09:31,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195161706] [2022-07-13 22:09:31,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:31,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:09:31,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:31,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:09:31,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:09:31,339 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-13 22:09:31,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 493 transitions, 3898 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:31,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:31,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-13 22:09:31,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:35,630 INFO L129 PetriNetUnfolder]: 15535/27948 cut-off events. [2022-07-13 22:09:35,630 INFO L130 PetriNetUnfolder]: For 103597/105179 co-relation queries the response was YES. [2022-07-13 22:09:35,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102912 conditions, 27948 events. 15535/27948 cut-off events. For 103597/105179 co-relation queries the response was YES. Maximal size of possible extension queue 1697. Compared 255952 event pairs, 1007 based on Foata normal form. 458/27492 useless extension candidates. Maximal degree in co-relation 102878. Up to 6111 conditions per place. [2022-07-13 22:09:36,182 INFO L132 encePairwiseOnDemand]: 239/247 looper letters, 329 selfloop transitions, 136 changer transitions 0/650 dead transitions. [2022-07-13 22:09:36,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 650 transitions, 6270 flow [2022-07-13 22:09:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:09:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:09:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1319 transitions. [2022-07-13 22:09:36,187 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8900134952766532 [2022-07-13 22:09:36,187 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1319 transitions. [2022-07-13 22:09:36,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1319 transitions. [2022-07-13 22:09:36,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:36,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1319 transitions. [2022-07-13 22:09:36,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.83333333333334) internal successors, (1319), 6 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:36,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:36,196 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 247.0) internal successors, (1729), 7 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:36,196 INFO L186 Difference]: Start difference. First operand has 281 places, 493 transitions, 3898 flow. Second operand 6 states and 1319 transitions. [2022-07-13 22:09:36,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 650 transitions, 6270 flow [2022-07-13 22:09:36,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 650 transitions, 6240 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-07-13 22:09:36,965 INFO L242 Difference]: Finished difference. Result has 290 places, 525 transitions, 4824 flow [2022-07-13 22:09:36,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4824, PETRI_PLACES=290, PETRI_TRANSITIONS=525} [2022-07-13 22:09:36,966 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 66 predicate places. [2022-07-13 22:09:36,966 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 525 transitions, 4824 flow [2022-07-13 22:09:36,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:36,967 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:36,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:36,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 22:09:36,968 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:36,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:36,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1433283384, now seen corresponding path program 4 times [2022-07-13 22:09:36,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:36,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094494132] [2022-07-13 22:09:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:36,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:37,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:37,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094494132] [2022-07-13 22:09:37,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094494132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:37,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:37,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:09:37,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92754978] [2022-07-13 22:09:37,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:37,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:09:37,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:09:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:09:37,085 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 247 [2022-07-13 22:09:37,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 525 transitions, 4824 flow. Second operand has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:37,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:37,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 247 [2022-07-13 22:09:37,087 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:41,625 INFO L129 PetriNetUnfolder]: 15233/27247 cut-off events. [2022-07-13 22:09:41,626 INFO L130 PetriNetUnfolder]: For 130336/132001 co-relation queries the response was YES. [2022-07-13 22:09:41,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107423 conditions, 27247 events. 15233/27247 cut-off events. For 130336/132001 co-relation queries the response was YES. Maximal size of possible extension queue 1636. Compared 246417 event pairs, 531 based on Foata normal form. 280/26579 useless extension candidates. Maximal degree in co-relation 107384. Up to 7933 conditions per place. [2022-07-13 22:09:42,221 INFO L132 encePairwiseOnDemand]: 240/247 looper letters, 304 selfloop transitions, 86 changer transitions 0/575 dead transitions. [2022-07-13 22:09:42,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 575 transitions, 5991 flow [2022-07-13 22:09:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:09:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:09:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1102 transitions. [2022-07-13 22:09:42,225 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8923076923076924 [2022-07-13 22:09:42,225 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1102 transitions. [2022-07-13 22:09:42,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1102 transitions. [2022-07-13 22:09:42,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:42,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1102 transitions. [2022-07-13 22:09:42,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.4) internal successors, (1102), 5 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:42,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:42,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 247.0) internal successors, (1482), 6 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:42,231 INFO L186 Difference]: Start difference. First operand has 290 places, 525 transitions, 4824 flow. Second operand 5 states and 1102 transitions. [2022-07-13 22:09:42,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 575 transitions, 5991 flow [2022-07-13 22:09:43,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 575 transitions, 5927 flow, removed 32 selfloop flow, removed 0 redundant places. [2022-07-13 22:09:43,637 INFO L242 Difference]: Finished difference. Result has 297 places, 528 transitions, 5165 flow [2022-07-13 22:09:43,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=247, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5165, PETRI_PLACES=297, PETRI_TRANSITIONS=528} [2022-07-13 22:09:43,638 INFO L279 CegarLoopForPetriNet]: 224 programPoint places, 73 predicate places. [2022-07-13 22:09:43,639 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 528 transitions, 5165 flow [2022-07-13 22:09:43,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 211.0) internal successors, (1055), 5 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:43,639 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:43,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:43,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 22:09:43,643 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-13 22:09:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash 139212771, now seen corresponding path program 1 times [2022-07-13 22:09:43,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:43,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000363559] [2022-07-13 22:09:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:43,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:44,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:44,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000363559] [2022-07-13 22:09:44,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000363559] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:44,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583307967] [2022-07-13 22:09:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:44,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:44,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:44,432 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) [2022-07-13 22:09:44,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:09:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:44,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-13 22:09:44,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:45,690 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 [2022-07-13 22:09:46,702 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 [2022-07-13 22:09:46,840 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 [2022-07-13 22:09:46,959 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 [2022-07-13 22:09:47,060 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 [2022-07-13 22:09:47,382 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 [2022-07-13 22:09:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:47,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:49,835 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:09:49,836 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 73 treesize of output 61 [2022-07-13 22:09:49,852 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 5131 treesize of output 5003 [2022-07-13 22:09:49,893 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 5003 treesize of output 4619 [2022-07-13 22:09:49,942 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 2407 treesize of output 2215 [2022-07-13 22:09:50,009 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 4427 treesize of output 3659 [2022-07-13 22:09:50,046 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 3659 treesize of output 3563