./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-figure1.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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:06:12,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:06:12,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:06:12,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:06:12,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:06:12,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:06:12,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:06:12,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:06:12,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:06:12,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:06:12,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:06:12,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:06:12,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:06:12,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:06:12,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:06:12,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:06:12,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:06:12,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:06:12,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:06:12,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:06:12,549 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:06:12,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:06:12,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:06:12,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:06:12,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:06:12,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:06:12,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:06:12,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:06:12,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:06:12,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:06:12,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:06:12,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:06:12,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:06:12,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:06:12,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:06:12,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:06:12,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:06:12,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:06:12,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:06:12,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:06:12,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:06:12,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:06:12,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:06:12,617 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:06:12,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:06:12,618 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:06:12,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:06:12,619 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:06:12,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:06:12,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:06:12,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:06:12,621 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:06:12,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:06:12,622 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:06:12,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:06:12,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:06:12,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:06:12,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:06:12,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:06:12,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:06:12,624 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:06:12,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:06:12,624 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:06:12,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:06:12,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:06:12,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:06:12,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:06:12,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:06:12,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:06:12,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:06:12,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:06:12,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:06:12,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:06:12,627 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:06:12,627 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:06:12,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:06:12,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-07-21 09:06:12,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:06:12,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:06:12,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:06:12,969 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:06:12,970 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:06:12,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-07-21 09:06:13,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c33a6e2f9/018c197eabf6415a99fa9894033806c2/FLAG6a51c77f9 [2022-07-21 09:06:13,427 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:06:13,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-07-21 09:06:13,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c33a6e2f9/018c197eabf6415a99fa9894033806c2/FLAG6a51c77f9 [2022-07-21 09:06:13,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c33a6e2f9/018c197eabf6415a99fa9894033806c2 [2022-07-21 09:06:13,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:06:13,823 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:06:13,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:06:13,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:06:13,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:06:13,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:06:13" (1/1) ... [2022-07-21 09:06:13,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb61722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:13, skipping insertion in model container [2022-07-21 09:06:13,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:06:13" (1/1) ... [2022-07-21 09:06:13,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:06:13,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:06:13,977 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-figure1.wvr.c[1991,2004] [2022-07-21 09:06:13,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:06:13,993 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:06:14,024 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-figure1.wvr.c[1991,2004] [2022-07-21 09:06:14,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:06:14,074 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:06:14,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14 WrapperNode [2022-07-21 09:06:14,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:06:14,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:06:14,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:06:14,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:06:14,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,109 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-07-21 09:06:14,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:06:14,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:06:14,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:06:14,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:06:14,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:06:14,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:06:14,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:06:14,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:06:14,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (1/1) ... [2022-07-21 09:06:14,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:06:14,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:14,184 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) [2022-07-21 09:06:14,211 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 [2022-07-21 09:06:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:06:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:06:14,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:06:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:06:14,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:06:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:06:14,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:06:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:06:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:06:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:06:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:06:14,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:06:14,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:06:14,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:06:14,234 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:06:14,326 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:06:14,327 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:06:14,520 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:06:14,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:06:14,553 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 09:06:14,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:06:14 BoogieIcfgContainer [2022-07-21 09:06:14,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:06:14,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:06:14,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:06:14,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:06:14,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:06:13" (1/3) ... [2022-07-21 09:06:14,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de3727d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:06:14, skipping insertion in model container [2022-07-21 09:06:14,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:06:14" (2/3) ... [2022-07-21 09:06:14,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de3727d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:06:14, skipping insertion in model container [2022-07-21 09:06:14,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:06:14" (3/3) ... [2022-07-21 09:06:14,562 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-07-21 09:06:14,567 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:06:14,575 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:06:14,575 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:06:14,575 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:06:14,633 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:06:14,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2022-07-21 09:06:14,695 INFO L129 PetriNetUnfolder]: 5/75 cut-off events. [2022-07-21 09:06:14,695 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:06:14,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-07-21 09:06:14,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2022-07-21 09:06:14,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2022-07-21 09:06:14,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:06:14,724 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@168411b8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@710fb7c3 [2022-07-21 09:06:14,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:06:14,752 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2022-07-21 09:06:14,752 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:06:14,753 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:14,754 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] [2022-07-21 09:06:14,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:14,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash -756496266, now seen corresponding path program 1 times [2022-07-21 09:06:14,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:14,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756583707] [2022-07-21 09:06:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:14,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:14,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:14,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756583707] [2022-07-21 09:06:14,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756583707] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:14,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:14,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:06:14,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161223608] [2022-07-21 09:06:14,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:14,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:06:14,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:06:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:06:14,964 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 77 [2022-07-21 09:06:14,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 144 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:14,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:14,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 77 [2022-07-21 09:06:14,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:15,003 INFO L129 PetriNetUnfolder]: 11/96 cut-off events. [2022-07-21 09:06:15,004 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-21 09:06:15,005 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 96 events. 11/96 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 155 event pairs, 3 based on Foata normal form. 10/98 useless extension candidates. Maximal degree in co-relation 67. Up to 19 conditions per place. [2022-07-21 09:06:15,007 INFO L132 encePairwiseOnDemand]: 74/77 looper letters, 6 selfloop transitions, 0 changer transitions 1/63 dead transitions. [2022-07-21 09:06:15,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 150 flow [2022-07-21 09:06:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:06:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:06:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 143 transitions. [2022-07-21 09:06:15,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2022-07-21 09:06:15,018 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 143 transitions. [2022-07-21 09:06:15,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 143 transitions. [2022-07-21 09:06:15,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:15,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 143 transitions. [2022-07-21 09:06:15,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,031 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,032 INFO L186 Difference]: Start difference. First operand has 68 places, 66 transitions, 144 flow. Second operand 2 states and 143 transitions. [2022-07-21 09:06:15,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 150 flow [2022-07-21 09:06:15,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 142 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:06:15,042 INFO L242 Difference]: Finished difference. Result has 65 places, 62 transitions, 128 flow [2022-07-21 09:06:15,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2022-07-21 09:06:15,047 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2022-07-21 09:06:15,047 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 128 flow [2022-07-21 09:06:15,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,048 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:15,048 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] [2022-07-21 09:06:15,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:06:15,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:15,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2091830959, now seen corresponding path program 1 times [2022-07-21 09:06:15,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:15,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808839537] [2022-07-21 09:06:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:15,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:15,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:15,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808839537] [2022-07-21 09:06:15,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808839537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:15,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:15,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:06:15,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596370334] [2022-07-21 09:06:15,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:15,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:06:15,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:15,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:06:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:06:15,220 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-07-21 09:06:15,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:15,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-07-21 09:06:15,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:15,290 INFO L129 PetriNetUnfolder]: 8/99 cut-off events. [2022-07-21 09:06:15,290 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-21 09:06:15,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 99 events. 8/99 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 171 event pairs, 1 based on Foata normal form. 3/96 useless extension candidates. Maximal degree in co-relation 127. Up to 18 conditions per place. [2022-07-21 09:06:15,291 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 11 selfloop transitions, 2 changer transitions 5/69 dead transitions. [2022-07-21 09:06:15,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 181 flow [2022-07-21 09:06:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:06:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:06:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 325 transitions. [2022-07-21 09:06:15,295 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8441558441558441 [2022-07-21 09:06:15,295 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 325 transitions. [2022-07-21 09:06:15,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 325 transitions. [2022-07-21 09:06:15,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:15,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 325 transitions. [2022-07-21 09:06:15,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,300 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,300 INFO L186 Difference]: Start difference. First operand has 65 places, 62 transitions, 128 flow. Second operand 5 states and 325 transitions. [2022-07-21 09:06:15,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 181 flow [2022-07-21 09:06:15,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 69 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:06:15,303 INFO L242 Difference]: Finished difference. Result has 71 places, 63 transitions, 146 flow [2022-07-21 09:06:15,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2022-07-21 09:06:15,312 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-07-21 09:06:15,313 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 146 flow [2022-07-21 09:06:15,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:15,314 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] [2022-07-21 09:06:15,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:06:15,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:15,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2038057157, now seen corresponding path program 1 times [2022-07-21 09:06:15,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:15,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065584734] [2022-07-21 09:06:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:15,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:15,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:15,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065584734] [2022-07-21 09:06:15,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065584734] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:15,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514921954] [2022-07-21 09:06:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:15,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:15,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:15,409 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) [2022-07-21 09:06:15,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:06:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:15,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:06:15,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:15,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:15,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514921954] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:15,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:15,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-21 09:06:15,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262723651] [2022-07-21 09:06:15,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:15,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 09:06:15,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:15,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 09:06:15,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-21 09:06:15,691 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-21 09:06:15,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 57.55555555555556) internal successors, (518), 9 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:15,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:15,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-21 09:06:15,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:15,993 INFO L129 PetriNetUnfolder]: 110/320 cut-off events. [2022-07-21 09:06:15,993 INFO L130 PetriNetUnfolder]: For 27/35 co-relation queries the response was YES. [2022-07-21 09:06:15,995 INFO L84 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 320 events. 110/320 cut-off events. For 27/35 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1435 event pairs, 11 based on Foata normal form. 2/287 useless extension candidates. Maximal degree in co-relation 611. Up to 41 conditions per place. [2022-07-21 09:06:15,998 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 52 selfloop transitions, 24 changer transitions 5/125 dead transitions. [2022-07-21 09:06:15,998 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 461 flow [2022-07-21 09:06:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:06:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:06:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 854 transitions. [2022-07-21 09:06:16,003 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-07-21 09:06:16,003 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 854 transitions. [2022-07-21 09:06:16,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 854 transitions. [2022-07-21 09:06:16,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:16,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 854 transitions. [2022-07-21 09:06:16,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,013 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,013 INFO L186 Difference]: Start difference. First operand has 71 places, 63 transitions, 146 flow. Second operand 14 states and 854 transitions. [2022-07-21 09:06:16,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 461 flow [2022-07-21 09:06:16,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 125 transitions, 453 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-21 09:06:16,017 INFO L242 Difference]: Finished difference. Result has 86 places, 87 transitions, 288 flow [2022-07-21 09:06:16,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=288, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2022-07-21 09:06:16,018 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 18 predicate places. [2022-07-21 09:06:16,018 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 288 flow [2022-07-21 09:06:16,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 57.55555555555556) internal successors, (518), 9 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,019 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:16,019 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] [2022-07-21 09:06:16,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:16,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:16,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash -465536495, now seen corresponding path program 2 times [2022-07-21 09:06:16,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:16,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596161676] [2022-07-21 09:06:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:16,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:16,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:16,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596161676] [2022-07-21 09:06:16,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596161676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:16,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:16,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:06:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001227014] [2022-07-21 09:06:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:16,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:06:16,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:06:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:06:16,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-21 09:06:16,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:16,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-21 09:06:16,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:16,436 INFO L129 PetriNetUnfolder]: 116/321 cut-off events. [2022-07-21 09:06:16,436 INFO L130 PetriNetUnfolder]: For 290/290 co-relation queries the response was YES. [2022-07-21 09:06:16,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 321 events. 116/321 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1414 event pairs, 48 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 869. Up to 162 conditions per place. [2022-07-21 09:06:16,441 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 50 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2022-07-21 09:06:16,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 107 transitions, 504 flow [2022-07-21 09:06:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:06:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:06:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2022-07-21 09:06:16,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-07-21 09:06:16,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2022-07-21 09:06:16,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2022-07-21 09:06:16,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:16,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2022-07-21 09:06:16,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,451 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,451 INFO L186 Difference]: Start difference. First operand has 86 places, 87 transitions, 288 flow. Second operand 5 states and 317 transitions. [2022-07-21 09:06:16,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 107 transitions, 504 flow [2022-07-21 09:06:16,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 107 transitions, 502 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-07-21 09:06:16,462 INFO L242 Difference]: Finished difference. Result has 92 places, 92 transitions, 357 flow [2022-07-21 09:06:16,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2022-07-21 09:06:16,463 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 24 predicate places. [2022-07-21 09:06:16,463 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 357 flow [2022-07-21 09:06:16,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,463 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:16,463 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] [2022-07-21 09:06:16,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:06:16,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash 88617565, now seen corresponding path program 3 times [2022-07-21 09:06:16,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:16,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113739135] [2022-07-21 09:06:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:16,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:16,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:16,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113739135] [2022-07-21 09:06:16,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113739135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:16,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305009215] [2022-07-21 09:06:16,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:06:16,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:16,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:16,585 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) [2022-07-21 09:06:16,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:06:16,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:06:16,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:16,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:06:16,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:16,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:16,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305009215] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:16,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:16,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-21 09:06:16,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440454719] [2022-07-21 09:06:16,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:16,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:06:16,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:16,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:06:16,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:06:16,743 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-21 09:06:16,744 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 357 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,744 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:16,744 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-21 09:06:16,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:16,913 INFO L129 PetriNetUnfolder]: 166/507 cut-off events. [2022-07-21 09:06:16,913 INFO L130 PetriNetUnfolder]: For 671/673 co-relation queries the response was YES. [2022-07-21 09:06:16,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 507 events. 166/507 cut-off events. For 671/673 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2613 event pairs, 36 based on Foata normal form. 9/509 useless extension candidates. Maximal degree in co-relation 1363. Up to 114 conditions per place. [2022-07-21 09:06:16,918 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 66 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2022-07-21 09:06:16,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 839 flow [2022-07-21 09:06:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:06:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:06:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 564 transitions. [2022-07-21 09:06:16,921 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8138528138528138 [2022-07-21 09:06:16,921 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 564 transitions. [2022-07-21 09:06:16,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 564 transitions. [2022-07-21 09:06:16,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:16,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 564 transitions. [2022-07-21 09:06:16,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.666666666666664) internal successors, (564), 9 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,925 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 77.0) internal successors, (770), 10 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,925 INFO L186 Difference]: Start difference. First operand has 92 places, 92 transitions, 357 flow. Second operand 9 states and 564 transitions. [2022-07-21 09:06:16,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 839 flow [2022-07-21 09:06:16,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 823 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-21 09:06:16,932 INFO L242 Difference]: Finished difference. Result has 104 places, 112 transitions, 598 flow [2022-07-21 09:06:16,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=598, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2022-07-21 09:06:16,933 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2022-07-21 09:06:16,933 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 598 flow [2022-07-21 09:06:16,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:16,934 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:16,934 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] [2022-07-21 09:06:16,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:17,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:17,147 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1808089009, now seen corresponding path program 4 times [2022-07-21 09:06:17,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:17,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69068761] [2022-07-21 09:06:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:17,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:17,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:17,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69068761] [2022-07-21 09:06:17,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69068761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:17,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578494527] [2022-07-21 09:06:17,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:06:17,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:17,210 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) [2022-07-21 09:06:17,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:06:17,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:06:17,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:17,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:06:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:17,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:17,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578494527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:17,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:17,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-07-21 09:06:17,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711168033] [2022-07-21 09:06:17,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:17,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:06:17,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:06:17,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-21 09:06:17,377 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-21 09:06:17,377 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 598 flow. Second operand has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:17,378 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:17,378 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-21 09:06:17,378 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:17,592 INFO L129 PetriNetUnfolder]: 201/614 cut-off events. [2022-07-21 09:06:17,593 INFO L130 PetriNetUnfolder]: For 1320/1324 co-relation queries the response was YES. [2022-07-21 09:06:17,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 614 events. 201/614 cut-off events. For 1320/1324 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3490 event pairs, 21 based on Foata normal form. 11/619 useless extension candidates. Maximal degree in co-relation 1829. Up to 106 conditions per place. [2022-07-21 09:06:17,599 INFO L132 encePairwiseOnDemand]: 69/77 looper letters, 63 selfloop transitions, 52 changer transitions 1/160 dead transitions. [2022-07-21 09:06:17,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1069 flow [2022-07-21 09:06:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:06:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:06:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 743 transitions. [2022-07-21 09:06:17,602 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8041125541125541 [2022-07-21 09:06:17,602 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 743 transitions. [2022-07-21 09:06:17,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 743 transitions. [2022-07-21 09:06:17,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:17,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 743 transitions. [2022-07-21 09:06:17,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:17,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:17,607 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 77.0) internal successors, (1001), 13 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:17,607 INFO L186 Difference]: Start difference. First operand has 104 places, 112 transitions, 598 flow. Second operand 12 states and 743 transitions. [2022-07-21 09:06:17,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1069 flow [2022-07-21 09:06:17,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 160 transitions, 1063 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-21 09:06:17,615 INFO L242 Difference]: Finished difference. Result has 118 places, 122 transitions, 800 flow [2022-07-21 09:06:17,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=800, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2022-07-21 09:06:17,616 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2022-07-21 09:06:17,617 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 800 flow [2022-07-21 09:06:17,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 57.81818181818182) internal successors, (636), 11 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:17,617 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:17,617 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] [2022-07-21 09:06:17,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:17,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:17,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1386634823, now seen corresponding path program 5 times [2022-07-21 09:06:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:17,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851436718] [2022-07-21 09:06:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:17,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:17,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:17,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851436718] [2022-07-21 09:06:17,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851436718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:17,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:17,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:06:17,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545384409] [2022-07-21 09:06:17,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:17,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:06:17,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:06:17,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:06:17,888 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-21 09:06:17,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 800 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:17,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:17,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-21 09:06:17,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:18,017 INFO L129 PetriNetUnfolder]: 200/606 cut-off events. [2022-07-21 09:06:18,018 INFO L130 PetriNetUnfolder]: For 1751/1755 co-relation queries the response was YES. [2022-07-21 09:06:18,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 606 events. 200/606 cut-off events. For 1751/1755 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3432 event pairs, 92 based on Foata normal form. 1/598 useless extension candidates. Maximal degree in co-relation 1993. Up to 248 conditions per place. [2022-07-21 09:06:18,024 INFO L132 encePairwiseOnDemand]: 70/77 looper letters, 75 selfloop transitions, 22 changer transitions 1/142 dead transitions. [2022-07-21 09:06:18,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 142 transitions, 1121 flow [2022-07-21 09:06:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:06:18,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:06:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 369 transitions. [2022-07-21 09:06:18,026 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7987012987012987 [2022-07-21 09:06:18,026 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 369 transitions. [2022-07-21 09:06:18,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 369 transitions. [2022-07-21 09:06:18,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:18,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 369 transitions. [2022-07-21 09:06:18,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.5) internal successors, (369), 6 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,029 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,029 INFO L186 Difference]: Start difference. First operand has 118 places, 122 transitions, 800 flow. Second operand 6 states and 369 transitions. [2022-07-21 09:06:18,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 142 transitions, 1121 flow [2022-07-21 09:06:18,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 142 transitions, 1094 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-07-21 09:06:18,038 INFO L242 Difference]: Finished difference. Result has 122 places, 123 transitions, 866 flow [2022-07-21 09:06:18,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=866, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2022-07-21 09:06:18,040 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 54 predicate places. [2022-07-21 09:06:18,040 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 866 flow [2022-07-21 09:06:18,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,040 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:18,040 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] [2022-07-21 09:06:18,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:06:18,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash -172972305, now seen corresponding path program 6 times [2022-07-21 09:06:18,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:18,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561825618] [2022-07-21 09:06:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:18,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:18,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:18,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561825618] [2022-07-21 09:06:18,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561825618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:06:18,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:06:18,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 09:06:18,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391499838] [2022-07-21 09:06:18,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:06:18,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 09:06:18,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:18,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 09:06:18,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 09:06:18,084 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-07-21 09:06:18,084 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 866 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:18,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-07-21 09:06:18,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:18,223 INFO L129 PetriNetUnfolder]: 199/571 cut-off events. [2022-07-21 09:06:18,223 INFO L130 PetriNetUnfolder]: For 1971/1975 co-relation queries the response was YES. [2022-07-21 09:06:18,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2034 conditions, 571 events. 199/571 cut-off events. For 1971/1975 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3133 event pairs, 90 based on Foata normal form. 1/562 useless extension candidates. Maximal degree in co-relation 2007. Up to 231 conditions per place. [2022-07-21 09:06:18,229 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 68 selfloop transitions, 23 changer transitions 2/137 dead transitions. [2022-07-21 09:06:18,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 1127 flow [2022-07-21 09:06:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 09:06:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 09:06:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2022-07-21 09:06:18,231 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2022-07-21 09:06:18,231 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2022-07-21 09:06:18,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2022-07-21 09:06:18,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:18,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2022-07-21 09:06:18,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,233 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,233 INFO L186 Difference]: Start difference. First operand has 122 places, 123 transitions, 866 flow. Second operand 5 states and 315 transitions. [2022-07-21 09:06:18,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 1127 flow [2022-07-21 09:06:18,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 137 transitions, 1092 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-07-21 09:06:18,244 INFO L242 Difference]: Finished difference. Result has 123 places, 122 transitions, 855 flow [2022-07-21 09:06:18,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=855, PETRI_PLACES=123, PETRI_TRANSITIONS=122} [2022-07-21 09:06:18,247 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 55 predicate places. [2022-07-21 09:06:18,247 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 122 transitions, 855 flow [2022-07-21 09:06:18,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,248 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:18,248 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] [2022-07-21 09:06:18,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:06:18,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:18,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1441489239, now seen corresponding path program 1 times [2022-07-21 09:06:18,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:18,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243304819] [2022-07-21 09:06:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:18,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:06:18,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:18,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243304819] [2022-07-21 09:06:18,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243304819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:18,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876683426] [2022-07-21 09:06:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:18,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:18,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:18,343 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) [2022-07-21 09:06:18,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:06:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 09:06:18,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:06:18,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:06:18,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876683426] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:18,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:18,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-07-21 09:06:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659563499] [2022-07-21 09:06:18,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 09:06:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 09:06:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 09:06:18,540 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 77 [2022-07-21 09:06:18,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 122 transitions, 855 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:18,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 77 [2022-07-21 09:06:18,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:18,668 INFO L129 PetriNetUnfolder]: 114/633 cut-off events. [2022-07-21 09:06:18,669 INFO L130 PetriNetUnfolder]: For 1210/1248 co-relation queries the response was YES. [2022-07-21 09:06:18,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1753 conditions, 633 events. 114/633 cut-off events. For 1210/1248 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4261 event pairs, 16 based on Foata normal form. 19/640 useless extension candidates. Maximal degree in co-relation 1726. Up to 80 conditions per place. [2022-07-21 09:06:18,675 INFO L132 encePairwiseOnDemand]: 71/77 looper letters, 18 selfloop transitions, 5 changer transitions 5/137 dead transitions. [2022-07-21 09:06:18,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 945 flow [2022-07-21 09:06:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 09:06:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-21 09:06:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2022-07-21 09:06:18,677 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.854978354978355 [2022-07-21 09:06:18,677 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 395 transitions. [2022-07-21 09:06:18,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 395 transitions. [2022-07-21 09:06:18,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:18,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 395 transitions. [2022-07-21 09:06:18,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,680 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 77.0) internal successors, (539), 7 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,680 INFO L186 Difference]: Start difference. First operand has 123 places, 122 transitions, 855 flow. Second operand 6 states and 395 transitions. [2022-07-21 09:06:18,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 945 flow [2022-07-21 09:06:18,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 137 transitions, 837 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-07-21 09:06:18,687 INFO L242 Difference]: Finished difference. Result has 119 places, 124 transitions, 779 flow [2022-07-21 09:06:18,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2022-07-21 09:06:18,689 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 51 predicate places. [2022-07-21 09:06:18,689 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 779 flow [2022-07-21 09:06:18,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:18,689 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:18,690 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:18,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 09:06:18,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:18,903 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:18,904 INFO L85 PathProgramCache]: Analyzing trace with hash 886319805, now seen corresponding path program 2 times [2022-07-21 09:06:18,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:18,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028120557] [2022-07-21 09:06:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:18,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:18,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:18,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028120557] [2022-07-21 09:06:18,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028120557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:18,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098954578] [2022-07-21 09:06:18,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:06:18,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:18,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:18,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:18,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:06:19,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:06:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:19,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:19,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:19,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:19,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098954578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:19,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:19,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-07-21 09:06:19,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380550797] [2022-07-21 09:06:19,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:19,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:06:19,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:06:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:06:19,266 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:19,267 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 779 flow. Second operand has 21 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:19,267 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:19,267 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:19,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:19,704 INFO L129 PetriNetUnfolder]: 478/1432 cut-off events. [2022-07-21 09:06:19,704 INFO L130 PetriNetUnfolder]: For 2697/2697 co-relation queries the response was YES. [2022-07-21 09:06:19,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1432 events. 478/1432 cut-off events. For 2697/2697 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10471 event pairs, 159 based on Foata normal form. 1/1424 useless extension candidates. Maximal degree in co-relation 4656. Up to 556 conditions per place. [2022-07-21 09:06:19,717 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 74 selfloop transitions, 47 changer transitions 8/171 dead transitions. [2022-07-21 09:06:19,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 171 transitions, 1299 flow [2022-07-21 09:06:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 09:06:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-21 09:06:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 924 transitions. [2022-07-21 09:06:19,720 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-07-21 09:06:19,720 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 924 transitions. [2022-07-21 09:06:19,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 924 transitions. [2022-07-21 09:06:19,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:19,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 924 transitions. [2022-07-21 09:06:19,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:19,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:19,725 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:19,725 INFO L186 Difference]: Start difference. First operand has 119 places, 124 transitions, 779 flow. Second operand 16 states and 924 transitions. [2022-07-21 09:06:19,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 171 transitions, 1299 flow [2022-07-21 09:06:19,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 171 transitions, 1283 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-21 09:06:19,734 INFO L242 Difference]: Finished difference. Result has 138 places, 137 transitions, 1000 flow [2022-07-21 09:06:19,735 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1000, PETRI_PLACES=138, PETRI_TRANSITIONS=137} [2022-07-21 09:06:19,735 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 70 predicate places. [2022-07-21 09:06:19,735 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 137 transitions, 1000 flow [2022-07-21 09:06:19,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:19,736 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:19,736 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:19,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:19,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 09:06:19,963 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:19,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash -247580723, now seen corresponding path program 3 times [2022-07-21 09:06:19,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:19,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854958906] [2022-07-21 09:06:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:19,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:20,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:20,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854958906] [2022-07-21 09:06:20,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854958906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:20,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595951226] [2022-07-21 09:06:20,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:06:20,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:20,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:20,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:20,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:06:20,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 09:06:20,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:20,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:20,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:20,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:20,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595951226] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:20,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:20,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-21 09:06:20,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119445047] [2022-07-21 09:06:20,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:20,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 09:06:20,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 09:06:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-21 09:06:20,276 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:20,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 137 transitions, 1000 flow. Second operand has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:20,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:20,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:20,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:20,989 INFO L129 PetriNetUnfolder]: 637/1823 cut-off events. [2022-07-21 09:06:20,989 INFO L130 PetriNetUnfolder]: For 5334/5334 co-relation queries the response was YES. [2022-07-21 09:06:20,998 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 1823 events. 637/1823 cut-off events. For 5334/5334 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13817 event pairs, 119 based on Foata normal form. 17/1832 useless extension candidates. Maximal degree in co-relation 6858. Up to 359 conditions per place. [2022-07-21 09:06:21,008 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 124 selfloop transitions, 120 changer transitions 30/316 dead transitions. [2022-07-21 09:06:21,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 316 transitions, 2973 flow [2022-07-21 09:06:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 09:06:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-21 09:06:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1355 transitions. [2022-07-21 09:06:21,014 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7651044607566346 [2022-07-21 09:06:21,014 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1355 transitions. [2022-07-21 09:06:21,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1355 transitions. [2022-07-21 09:06:21,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:21,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1355 transitions. [2022-07-21 09:06:21,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 58.91304347826087) internal successors, (1355), 23 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:21,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:21,022 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 77.0) internal successors, (1848), 24 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:21,023 INFO L186 Difference]: Start difference. First operand has 138 places, 137 transitions, 1000 flow. Second operand 23 states and 1355 transitions. [2022-07-21 09:06:21,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 316 transitions, 2973 flow [2022-07-21 09:06:21,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 316 transitions, 2872 flow, removed 30 selfloop flow, removed 3 redundant places. [2022-07-21 09:06:21,066 INFO L242 Difference]: Finished difference. Result has 164 places, 208 transitions, 1906 flow [2022-07-21 09:06:21,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1906, PETRI_PLACES=164, PETRI_TRANSITIONS=208} [2022-07-21 09:06:21,067 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2022-07-21 09:06:21,068 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 208 transitions, 1906 flow [2022-07-21 09:06:21,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:21,068 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:21,068 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:21,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:21,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:21,292 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash -125754799, now seen corresponding path program 4 times [2022-07-21 09:06:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294874291] [2022-07-21 09:06:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:21,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:21,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:21,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294874291] [2022-07-21 09:06:21,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294874291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:21,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065365421] [2022-07-21 09:06:21,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:06:21,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:21,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:21,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:21,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:06:21,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:06:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:21,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:21,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065365421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:21,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:21,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 09:06:21,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833424168] [2022-07-21 09:06:21,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:21,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:06:21,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:06:21,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:06:21,632 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:21,633 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 208 transitions, 1906 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:21,633 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:21,633 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:21,633 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:22,551 INFO L129 PetriNetUnfolder]: 886/2464 cut-off events. [2022-07-21 09:06:22,551 INFO L130 PetriNetUnfolder]: For 11800/11800 co-relation queries the response was YES. [2022-07-21 09:06:22,565 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10935 conditions, 2464 events. 886/2464 cut-off events. For 11800/11800 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19710 event pairs, 97 based on Foata normal form. 21/2472 useless extension candidates. Maximal degree in co-relation 10896. Up to 401 conditions per place. [2022-07-21 09:06:22,580 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 151 selfloop transitions, 203 changer transitions 3/399 dead transitions. [2022-07-21 09:06:22,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 399 transitions, 4299 flow [2022-07-21 09:06:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 09:06:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-21 09:06:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1753 transitions. [2022-07-21 09:06:22,585 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2022-07-21 09:06:22,585 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1753 transitions. [2022-07-21 09:06:22,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1753 transitions. [2022-07-21 09:06:22,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:22,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1753 transitions. [2022-07-21 09:06:22,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.43333333333333) internal successors, (1753), 30 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:22,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:22,596 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 77.0) internal successors, (2387), 31 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:22,596 INFO L186 Difference]: Start difference. First operand has 164 places, 208 transitions, 1906 flow. Second operand 30 states and 1753 transitions. [2022-07-21 09:06:22,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 399 transitions, 4299 flow [2022-07-21 09:06:22,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 399 transitions, 4204 flow, removed 45 selfloop flow, removed 2 redundant places. [2022-07-21 09:06:22,644 INFO L242 Difference]: Finished difference. Result has 205 places, 301 transitions, 3478 flow [2022-07-21 09:06:22,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3478, PETRI_PLACES=205, PETRI_TRANSITIONS=301} [2022-07-21 09:06:22,646 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 137 predicate places. [2022-07-21 09:06:22,646 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 301 transitions, 3478 flow [2022-07-21 09:06:22,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:22,646 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:22,647 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:22,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:22,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:22,871 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:22,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:22,872 INFO L85 PathProgramCache]: Analyzing trace with hash 38557705, now seen corresponding path program 5 times [2022-07-21 09:06:22,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:22,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828464519] [2022-07-21 09:06:22,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:22,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:22,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828464519] [2022-07-21 09:06:22,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828464519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268944445] [2022-07-21 09:06:22,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:06:22,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:22,971 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:22,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:06:23,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 09:06:23,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:23,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:23,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:23,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:23,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268944445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:23,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:23,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-21 09:06:23,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463792813] [2022-07-21 09:06:23,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:23,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 09:06:23,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 09:06:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:06:23,231 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:23,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 301 transitions, 3478 flow. Second operand has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:23,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:23,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:23,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:24,506 INFO L129 PetriNetUnfolder]: 1071/3017 cut-off events. [2022-07-21 09:06:24,506 INFO L130 PetriNetUnfolder]: For 25405/25405 co-relation queries the response was YES. [2022-07-21 09:06:24,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15872 conditions, 3017 events. 1071/3017 cut-off events. For 25405/25405 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25420 event pairs, 75 based on Foata normal form. 3/3014 useless extension candidates. Maximal degree in co-relation 15819. Up to 314 conditions per place. [2022-07-21 09:06:24,579 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 210 selfloop transitions, 255 changer transitions 10/517 dead transitions. [2022-07-21 09:06:24,580 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 517 transitions, 6632 flow [2022-07-21 09:06:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 09:06:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-07-21 09:06:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2713 transitions. [2022-07-21 09:06:24,585 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7496546007184305 [2022-07-21 09:06:24,585 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2713 transitions. [2022-07-21 09:06:24,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2713 transitions. [2022-07-21 09:06:24,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:24,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2713 transitions. [2022-07-21 09:06:24,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.723404255319146) internal successors, (2713), 47 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,599 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 77.0) internal successors, (3696), 48 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,600 INFO L186 Difference]: Start difference. First operand has 205 places, 301 transitions, 3478 flow. Second operand 47 states and 2713 transitions. [2022-07-21 09:06:24,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 517 transitions, 6632 flow [2022-07-21 09:06:24,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 517 transitions, 6404 flow, removed 37 selfloop flow, removed 9 redundant places. [2022-07-21 09:06:24,732 INFO L242 Difference]: Finished difference. Result has 254 places, 390 transitions, 5130 flow [2022-07-21 09:06:24,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5130, PETRI_PLACES=254, PETRI_TRANSITIONS=390} [2022-07-21 09:06:24,733 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 186 predicate places. [2022-07-21 09:06:24,733 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 390 transitions, 5130 flow [2022-07-21 09:06:24,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.64705882352941) internal successors, (946), 17 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:24,734 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:24,734 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:24,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 09:06:24,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 09:06:24,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1627335489, now seen corresponding path program 6 times [2022-07-21 09:06:24,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86864182] [2022-07-21 09:06:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:24,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:25,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:25,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86864182] [2022-07-21 09:06:25,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86864182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:25,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815598602] [2022-07-21 09:06:25,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:06:25,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:25,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:25,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:25,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:06:25,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-21 09:06:25,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:25,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:25,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:25,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:25,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815598602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:25,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:25,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 09:06:25,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167928359] [2022-07-21 09:06:25,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:25,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:06:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:06:25,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-21 09:06:25,329 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:25,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 390 transitions, 5130 flow. Second operand has 18 states, 18 states have (on average 56.166666666666664) internal successors, (1011), 18 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:25,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:25,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:25,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:26,942 INFO L129 PetriNetUnfolder]: 1271/3648 cut-off events. [2022-07-21 09:06:26,943 INFO L130 PetriNetUnfolder]: For 49999/49999 co-relation queries the response was YES. [2022-07-21 09:06:27,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22008 conditions, 3648 events. 1271/3648 cut-off events. For 49999/49999 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32683 event pairs, 100 based on Foata normal form. 19/3656 useless extension candidates. Maximal degree in co-relation 21944. Up to 573 conditions per place. [2022-07-21 09:06:27,051 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 185 selfloop transitions, 333 changer transitions 4/564 dead transitions. [2022-07-21 09:06:27,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 564 transitions, 8240 flow [2022-07-21 09:06:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 09:06:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-07-21 09:06:27,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2368 transitions. [2022-07-21 09:06:27,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7500791891035794 [2022-07-21 09:06:27,056 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2368 transitions. [2022-07-21 09:06:27,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2368 transitions. [2022-07-21 09:06:27,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:27,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2368 transitions. [2022-07-21 09:06:27,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.75609756097561) internal successors, (2368), 41 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:27,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:27,068 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 77.0) internal successors, (3234), 42 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:27,068 INFO L186 Difference]: Start difference. First operand has 254 places, 390 transitions, 5130 flow. Second operand 41 states and 2368 transitions. [2022-07-21 09:06:27,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 564 transitions, 8240 flow [2022-07-21 09:06:27,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 564 transitions, 7698 flow, removed 227 selfloop flow, removed 2 redundant places. [2022-07-21 09:06:27,346 INFO L242 Difference]: Finished difference. Result has 300 places, 456 transitions, 6627 flow [2022-07-21 09:06:27,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=4711, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6627, PETRI_PLACES=300, PETRI_TRANSITIONS=456} [2022-07-21 09:06:27,348 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 232 predicate places. [2022-07-21 09:06:27,348 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 456 transitions, 6627 flow [2022-07-21 09:06:27,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.166666666666664) internal successors, (1011), 18 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:27,349 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:27,349 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:27,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:27,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 09:06:27,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash -584043037, now seen corresponding path program 7 times [2022-07-21 09:06:27,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:27,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345001756] [2022-07-21 09:06:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:27,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345001756] [2022-07-21 09:06:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345001756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:27,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732479340] [2022-07-21 09:06:27,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:06:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:27,634 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:27,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:06:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:27,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:27,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:27,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:27,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732479340] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:27,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:27,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-21 09:06:27,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984010791] [2022-07-21 09:06:27,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:27,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 09:06:27,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 09:06:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-07-21 09:06:27,872 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:27,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 456 transitions, 6627 flow. Second operand has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:27,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:27,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:27,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:29,827 INFO L129 PetriNetUnfolder]: 1311/3738 cut-off events. [2022-07-21 09:06:29,827 INFO L130 PetriNetUnfolder]: For 57926/57926 co-relation queries the response was YES. [2022-07-21 09:06:29,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23500 conditions, 3738 events. 1311/3738 cut-off events. For 57926/57926 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 33721 event pairs, 95 based on Foata normal form. 27/3748 useless extension candidates. Maximal degree in co-relation 23428. Up to 471 conditions per place. [2022-07-21 09:06:29,884 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 238 selfloop transitions, 361 changer transitions 24/665 dead transitions. [2022-07-21 09:06:29,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 665 transitions, 10102 flow [2022-07-21 09:06:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-21 09:06:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-21 09:06:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 3914 transitions. [2022-07-21 09:06:29,890 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7475171886936592 [2022-07-21 09:06:29,890 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 3914 transitions. [2022-07-21 09:06:29,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 3914 transitions. [2022-07-21 09:06:29,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:29,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 3914 transitions. [2022-07-21 09:06:29,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 57.55882352941177) internal successors, (3914), 68 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:29,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:29,906 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 77.0) internal successors, (5313), 69 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:29,906 INFO L186 Difference]: Start difference. First operand has 300 places, 456 transitions, 6627 flow. Second operand 68 states and 3914 transitions. [2022-07-21 09:06:29,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 665 transitions, 10102 flow [2022-07-21 09:06:30,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 665 transitions, 9623 flow, removed 100 selfloop flow, removed 23 redundant places. [2022-07-21 09:06:30,204 INFO L242 Difference]: Finished difference. Result has 352 places, 491 transitions, 7737 flow [2022-07-21 09:06:30,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=7737, PETRI_PLACES=352, PETRI_TRANSITIONS=491} [2022-07-21 09:06:30,205 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 284 predicate places. [2022-07-21 09:06:30,205 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 491 transitions, 7737 flow [2022-07-21 09:06:30,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 55.8235294117647) internal successors, (949), 17 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:30,206 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:30,206 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:30,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 09:06:30,431 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:30,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:30,431 INFO L85 PathProgramCache]: Analyzing trace with hash -483096289, now seen corresponding path program 8 times [2022-07-21 09:06:30,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:30,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539468367] [2022-07-21 09:06:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:30,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:30,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539468367] [2022-07-21 09:06:30,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539468367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762364177] [2022-07-21 09:06:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:06:30,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:30,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:30,501 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:30,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 09:06:30,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:06:30,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:30,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:06:30,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762364177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:30,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:30,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-07-21 09:06:30,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840559367] [2022-07-21 09:06:30,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:06:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:06:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:06:30,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:30,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 491 transitions, 7737 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:30,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:30,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:30,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:32,962 INFO L129 PetriNetUnfolder]: 2281/6793 cut-off events. [2022-07-21 09:06:32,962 INFO L130 PetriNetUnfolder]: For 113952/113952 co-relation queries the response was YES. [2022-07-21 09:06:33,013 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43102 conditions, 6793 events. 2281/6793 cut-off events. For 113952/113952 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 68200 event pairs, 353 based on Foata normal form. 6/6734 useless extension candidates. Maximal degree in co-relation 43024. Up to 1557 conditions per place. [2022-07-21 09:06:33,053 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 525 selfloop transitions, 343 changer transitions 12/922 dead transitions. [2022-07-21 09:06:33,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 922 transitions, 15651 flow [2022-07-21 09:06:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-21 09:06:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-07-21 09:06:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3315 transitions. [2022-07-21 09:06:33,057 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7552973342447027 [2022-07-21 09:06:33,057 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3315 transitions. [2022-07-21 09:06:33,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3315 transitions. [2022-07-21 09:06:33,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:33,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3315 transitions. [2022-07-21 09:06:33,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 58.1578947368421) internal successors, (3315), 57 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 77.0) internal successors, (4466), 58 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,069 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 77.0) internal successors, (4466), 58 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,069 INFO L186 Difference]: Start difference. First operand has 352 places, 491 transitions, 7737 flow. Second operand 57 states and 3315 transitions. [2022-07-21 09:06:33,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 922 transitions, 15651 flow [2022-07-21 09:06:33,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 922 transitions, 15073 flow, removed 98 selfloop flow, removed 33 redundant places. [2022-07-21 09:06:33,629 INFO L242 Difference]: Finished difference. Result has 406 places, 728 transitions, 12514 flow [2022-07-21 09:06:33,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=7336, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=12514, PETRI_PLACES=406, PETRI_TRANSITIONS=728} [2022-07-21 09:06:33,630 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 338 predicate places. [2022-07-21 09:06:33,630 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 728 transitions, 12514 flow [2022-07-21 09:06:33,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:33,631 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:33,631 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:33,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:33,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 09:06:33,847 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash 571912985, now seen corresponding path program 9 times [2022-07-21 09:06:33,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634105372] [2022-07-21 09:06:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:33,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:33,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:33,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634105372] [2022-07-21 09:06:33,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634105372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:33,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382346481] [2022-07-21 09:06:33,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:06:33,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:33,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:33,920 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:33,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 09:06:33,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:06:33,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:33,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:33,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:34,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:34,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382346481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:34,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:34,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-21 09:06:34,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949158989] [2022-07-21 09:06:34,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:34,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:06:34,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:06:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:06:34,128 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:34,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 728 transitions, 12514 flow. Second operand has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:34,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:34,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:34,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:36,441 INFO L129 PetriNetUnfolder]: 2300/6854 cut-off events. [2022-07-21 09:06:36,441 INFO L130 PetriNetUnfolder]: For 156979/156979 co-relation queries the response was YES. [2022-07-21 09:06:36,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48422 conditions, 6854 events. 2300/6854 cut-off events. For 156979/156979 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 68900 event pairs, 656 based on Foata normal form. 1/6755 useless extension candidates. Maximal degree in co-relation 48313. Up to 2132 conditions per place. [2022-07-21 09:06:36,561 INFO L132 encePairwiseOnDemand]: 66/77 looper letters, 485 selfloop transitions, 256 changer transitions 8/791 dead transitions. [2022-07-21 09:06:36,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 791 transitions, 14955 flow [2022-07-21 09:06:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 09:06:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-21 09:06:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1386 transitions. [2022-07-21 09:06:36,564 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-07-21 09:06:36,565 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1386 transitions. [2022-07-21 09:06:36,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1386 transitions. [2022-07-21 09:06:36,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:36,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1386 transitions. [2022-07-21 09:06:36,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.75) internal successors, (1386), 24 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:36,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:36,572 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 77.0) internal successors, (1925), 25 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:36,572 INFO L186 Difference]: Start difference. First operand has 406 places, 728 transitions, 12514 flow. Second operand 24 states and 1386 transitions. [2022-07-21 09:06:36,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 791 transitions, 14955 flow [2022-07-21 09:06:37,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 791 transitions, 14460 flow, removed 203 selfloop flow, removed 6 redundant places. [2022-07-21 09:06:37,535 INFO L242 Difference]: Finished difference. Result has 432 places, 746 transitions, 12872 flow [2022-07-21 09:06:37,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12040, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12872, PETRI_PLACES=432, PETRI_TRANSITIONS=746} [2022-07-21 09:06:37,537 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 364 predicate places. [2022-07-21 09:06:37,537 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 746 transitions, 12872 flow [2022-07-21 09:06:37,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.4) internal successors, (1108), 20 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:37,538 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:37,538 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:37,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 09:06:37,739 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1469113975, now seen corresponding path program 10 times [2022-07-21 09:06:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:37,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114271253] [2022-07-21 09:06:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:37,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:37,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:37,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114271253] [2022-07-21 09:06:37,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114271253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:37,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946323953] [2022-07-21 09:06:37,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:06:37,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:37,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:37,802 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:37,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 09:06:37,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:06:37,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:37,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:38,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946323953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:38,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:38,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:06:38,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101185511] [2022-07-21 09:06:38,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:38,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:06:38,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:38,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:06:38,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:06:38,064 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:38,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 746 transitions, 12872 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:38,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:38,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:38,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:43,255 INFO L129 PetriNetUnfolder]: 4589/12732 cut-off events. [2022-07-21 09:06:43,255 INFO L130 PetriNetUnfolder]: For 315191/315191 co-relation queries the response was YES. [2022-07-21 09:06:43,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92593 conditions, 12732 events. 4589/12732 cut-off events. For 315191/315191 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 139450 event pairs, 605 based on Foata normal form. 68/12686 useless extension candidates. Maximal degree in co-relation 92475. Up to 2088 conditions per place. [2022-07-21 09:06:43,703 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 588 selfloop transitions, 1197 changer transitions 38/1865 dead transitions. [2022-07-21 09:06:43,703 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1865 transitions, 36408 flow [2022-07-21 09:06:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-21 09:06:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-07-21 09:06:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4916 transitions. [2022-07-21 09:06:43,710 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7423739051646029 [2022-07-21 09:06:43,711 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4916 transitions. [2022-07-21 09:06:43,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4916 transitions. [2022-07-21 09:06:43,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:43,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4916 transitions. [2022-07-21 09:06:43,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 57.16279069767442) internal successors, (4916), 86 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:43,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:43,736 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 77.0) internal successors, (6699), 87 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:43,736 INFO L186 Difference]: Start difference. First operand has 432 places, 746 transitions, 12872 flow. Second operand 86 states and 4916 transitions. [2022-07-21 09:06:43,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1865 transitions, 36408 flow [2022-07-21 09:06:45,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1865 transitions, 35637 flow, removed 66 selfloop flow, removed 6 redundant places. [2022-07-21 09:06:45,893 INFO L242 Difference]: Finished difference. Result has 535 places, 1518 transitions, 31372 flow [2022-07-21 09:06:45,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=12563, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=31372, PETRI_PLACES=535, PETRI_TRANSITIONS=1518} [2022-07-21 09:06:45,894 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 467 predicate places. [2022-07-21 09:06:45,895 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1518 transitions, 31372 flow [2022-07-21 09:06:45,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:45,895 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:06:45,895 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:06:45,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 09:06:46,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 09:06:46,103 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:06:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:06:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash 798999983, now seen corresponding path program 11 times [2022-07-21 09:06:46,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:06:46,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050782452] [2022-07-21 09:06:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:06:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:06:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:06:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:46,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:06:46,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050782452] [2022-07-21 09:06:46,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050782452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:06:46,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557332649] [2022-07-21 09:06:46,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 09:06:46,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:06:46,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:06:46,180 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:06:46,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 09:06:46,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-21 09:06:46,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:06:46,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:06:46,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:06:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:46,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:06:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:06:46,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557332649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:06:46,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:06:46,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:06:46,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251627238] [2022-07-21 09:06:46,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:06:46,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:06:46,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:06:46,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:06:46,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:06:46,403 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:06:46,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1518 transitions, 31372 flow. Second operand has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:46,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:06:46,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:06:46,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:06:55,100 INFO L129 PetriNetUnfolder]: 6229/17182 cut-off events. [2022-07-21 09:06:55,101 INFO L130 PetriNetUnfolder]: For 600922/600922 co-relation queries the response was YES. [2022-07-21 09:06:55,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144730 conditions, 17182 events. 6229/17182 cut-off events. For 600922/600922 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 198013 event pairs, 856 based on Foata normal form. 7/17025 useless extension candidates. Maximal degree in co-relation 144588. Up to 3275 conditions per place. [2022-07-21 09:06:55,459 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 880 selfloop transitions, 1252 changer transitions 7/2181 dead transitions. [2022-07-21 09:06:55,460 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 2181 transitions, 49810 flow [2022-07-21 09:06:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 09:06:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-07-21 09:06:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3003 transitions. [2022-07-21 09:06:55,463 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-07-21 09:06:55,463 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3003 transitions. [2022-07-21 09:06:55,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3003 transitions. [2022-07-21 09:06:55,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:06:55,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3003 transitions. [2022-07-21 09:06:55,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.75) internal successors, (3003), 52 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 77.0) internal successors, (4081), 53 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,473 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 77.0) internal successors, (4081), 53 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:06:55,473 INFO L186 Difference]: Start difference. First operand has 535 places, 1518 transitions, 31372 flow. Second operand 52 states and 3003 transitions. [2022-07-21 09:06:55,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 2181 transitions, 49810 flow [2022-07-21 09:07:01,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 2181 transitions, 49000 flow, removed 309 selfloop flow, removed 26 redundant places. [2022-07-21 09:07:01,135 INFO L242 Difference]: Finished difference. Result has 576 places, 1948 transitions, 45824 flow [2022-07-21 09:07:01,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=30741, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=845, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=45824, PETRI_PLACES=576, PETRI_TRANSITIONS=1948} [2022-07-21 09:07:01,137 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 508 predicate places. [2022-07-21 09:07:01,137 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1948 transitions, 45824 flow [2022-07-21 09:07:01,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.421052631578945) internal successors, (1053), 19 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:01,138 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:01,138 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:01,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:01,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:01,339 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:01,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1520202161, now seen corresponding path program 12 times [2022-07-21 09:07:01,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:01,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895886897] [2022-07-21 09:07:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:01,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:01,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:01,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895886897] [2022-07-21 09:07:01,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895886897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:01,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129690087] [2022-07-21 09:07:01,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 09:07:01,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:01,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:01,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:01,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 09:07:01,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-21 09:07:01,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:07:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:01,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:01,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129690087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:01,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:01,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:07:01,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292839491] [2022-07-21 09:07:01,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:07:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:07:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:07:01,621 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:07:01,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1948 transitions, 45824 flow. Second operand has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:01,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:01,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:07:01,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:13,078 INFO L129 PetriNetUnfolder]: 6300/17709 cut-off events. [2022-07-21 09:07:13,078 INFO L130 PetriNetUnfolder]: For 761741/761741 co-relation queries the response was YES. [2022-07-21 09:07:13,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158591 conditions, 17709 events. 6300/17709 cut-off events. For 761741/761741 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 207546 event pairs, 998 based on Foata normal form. 7/17514 useless extension candidates. Maximal degree in co-relation 158436. Up to 2403 conditions per place. [2022-07-21 09:07:13,424 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 734 selfloop transitions, 1465 changer transitions 18/2259 dead transitions. [2022-07-21 09:07:13,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 2259 transitions, 56612 flow [2022-07-21 09:07:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-21 09:07:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-21 09:07:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4016 transitions. [2022-07-21 09:07:13,428 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7450834879406308 [2022-07-21 09:07:13,428 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4016 transitions. [2022-07-21 09:07:13,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4016 transitions. [2022-07-21 09:07:13,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:13,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4016 transitions. [2022-07-21 09:07:13,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.371428571428574) internal successors, (4016), 70 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:13,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:13,442 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:13,443 INFO L186 Difference]: Start difference. First operand has 576 places, 1948 transitions, 45824 flow. Second operand 70 states and 4016 transitions. [2022-07-21 09:07:13,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 2259 transitions, 56612 flow [2022-07-21 09:07:20,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 2259 transitions, 55282 flow, removed 268 selfloop flow, removed 29 redundant places. [2022-07-21 09:07:20,962 INFO L242 Difference]: Finished difference. Result has 622 places, 2060 transitions, 51355 flow [2022-07-21 09:07:20,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=44573, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=51355, PETRI_PLACES=622, PETRI_TRANSITIONS=2060} [2022-07-21 09:07:20,964 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 554 predicate places. [2022-07-21 09:07:20,964 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 2060 transitions, 51355 flow [2022-07-21 09:07:20,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.473684210526315) internal successors, (1054), 19 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:20,964 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:20,964 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:20,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:21,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:21,179 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2008611189, now seen corresponding path program 13 times [2022-07-21 09:07:21,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:21,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444402798] [2022-07-21 09:07:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:21,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:21,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:21,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444402798] [2022-07-21 09:07:21,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444402798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:21,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581939649] [2022-07-21 09:07:21,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 09:07:21,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:21,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:21,244 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:21,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 09:07:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:21,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:07:21,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:21,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:21,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581939649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:21,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:21,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-21 09:07:21,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396570293] [2022-07-21 09:07:21,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:21,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:07:21,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:21,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:07:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:07:21,478 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:07:21,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 2060 transitions, 51355 flow. Second operand has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:21,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:21,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:07:21,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:32,778 INFO L129 PetriNetUnfolder]: 6334/17500 cut-off events. [2022-07-21 09:07:32,779 INFO L130 PetriNetUnfolder]: For 820978/820978 co-relation queries the response was YES. [2022-07-21 09:07:33,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165044 conditions, 17500 events. 6334/17500 cut-off events. For 820978/820978 co-relation queries the response was YES. Maximal size of possible extension queue 1219. Compared 203258 event pairs, 799 based on Foata normal form. 45/17355 useless extension candidates. Maximal degree in co-relation 164882. Up to 3742 conditions per place. [2022-07-21 09:07:33,114 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 737 selfloop transitions, 1552 changer transitions 45/2376 dead transitions. [2022-07-21 09:07:33,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 687 places, 2376 transitions, 62124 flow [2022-07-21 09:07:33,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-21 09:07:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-07-21 09:07:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 3929 transitions. [2022-07-21 09:07:33,117 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7395068699416526 [2022-07-21 09:07:33,117 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 3929 transitions. [2022-07-21 09:07:33,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 3929 transitions. [2022-07-21 09:07:33,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:33,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 3929 transitions. [2022-07-21 09:07:33,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 56.94202898550725) internal successors, (3929), 69 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:33,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:33,129 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 77.0) internal successors, (5390), 70 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:33,129 INFO L186 Difference]: Start difference. First operand has 622 places, 2060 transitions, 51355 flow. Second operand 69 states and 3929 transitions. [2022-07-21 09:07:33,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 687 places, 2376 transitions, 62124 flow [2022-07-21 09:07:40,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 2376 transitions, 60226 flow, removed 214 selfloop flow, removed 49 redundant places. [2022-07-21 09:07:40,801 INFO L242 Difference]: Finished difference. Result has 644 places, 2127 transitions, 55652 flow [2022-07-21 09:07:40,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=49404, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=55652, PETRI_PLACES=644, PETRI_TRANSITIONS=2127} [2022-07-21 09:07:40,804 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 576 predicate places. [2022-07-21 09:07:40,804 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 2127 transitions, 55652 flow [2022-07-21 09:07:40,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.63157894736842) internal successors, (1057), 19 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:40,804 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:07:40,805 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:07:40,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 09:07:41,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:41,019 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:07:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:07:41,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1858528645, now seen corresponding path program 14 times [2022-07-21 09:07:41,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:07:41,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113277345] [2022-07-21 09:07:41,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:07:41,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:07:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:07:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:41,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:07:41,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113277345] [2022-07-21 09:07:41,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113277345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:07:41,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796076538] [2022-07-21 09:07:41,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:07:41,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:07:41,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:07:41,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:07:41,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 09:07:41,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 09:07:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:07:41,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:07:41,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:07:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:41,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:07:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:07:41,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796076538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:07:41,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:07:41,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-07-21 09:07:41,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772638452] [2022-07-21 09:07:41,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:07:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:07:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:07:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:07:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:07:41,332 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:07:41,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 2127 transitions, 55652 flow. Second operand has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:41,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:07:41,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:07:41,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:07:55,640 INFO L129 PetriNetUnfolder]: 7232/20348 cut-off events. [2022-07-21 09:07:55,641 INFO L130 PetriNetUnfolder]: For 1038351/1038351 co-relation queries the response was YES. [2022-07-21 09:07:56,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 194534 conditions, 20348 events. 7232/20348 cut-off events. For 1038351/1038351 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 243197 event pairs, 649 based on Foata normal form. 34/20318 useless extension candidates. Maximal degree in co-relation 194369. Up to 4348 conditions per place. [2022-07-21 09:07:56,564 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1208 selfloop transitions, 1379 changer transitions 40/2669 dead transitions. [2022-07-21 09:07:56,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 2669 transitions, 72871 flow [2022-07-21 09:07:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-21 09:07:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-07-21 09:07:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3864 transitions. [2022-07-21 09:07:56,716 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7489823609226595 [2022-07-21 09:07:56,716 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3864 transitions. [2022-07-21 09:07:56,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3864 transitions. [2022-07-21 09:07:56,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:07:56,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3864 transitions. [2022-07-21 09:07:56,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 57.67164179104478) internal successors, (3864), 67 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:56,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:56,730 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 77.0) internal successors, (5236), 68 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:07:56,730 INFO L186 Difference]: Start difference. First operand has 644 places, 2127 transitions, 55652 flow. Second operand 67 states and 3864 transitions. [2022-07-21 09:07:56,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 2669 transitions, 72871 flow [2022-07-21 09:08:06,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 2669 transitions, 70678 flow, removed 140 selfloop flow, removed 54 redundant places. [2022-07-21 09:08:06,590 INFO L242 Difference]: Finished difference. Result has 684 places, 2416 transitions, 66057 flow [2022-07-21 09:08:06,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=53782, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=66057, PETRI_PLACES=684, PETRI_TRANSITIONS=2416} [2022-07-21 09:08:06,592 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 616 predicate places. [2022-07-21 09:08:06,592 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 2416 transitions, 66057 flow [2022-07-21 09:08:06,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.68421052631579) internal successors, (1058), 19 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:06,593 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:08:06,593 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:08:06,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 09:08:06,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:06,794 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:08:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:08:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash 978828719, now seen corresponding path program 15 times [2022-07-21 09:08:06,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:08:06,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400197582] [2022-07-21 09:08:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:08:06,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:08:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:06,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:08:06,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400197582] [2022-07-21 09:08:06,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400197582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:08:06,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45053771] [2022-07-21 09:08:06,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:08:06,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:06,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:08:06,864 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:08:06,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 09:08:06,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 09:08:06,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:08:06,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:08:06,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:08:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:07,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:08:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:07,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45053771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:08:07,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:08:07,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-07-21 09:08:07,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413124244] [2022-07-21 09:08:07,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:08:07,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:08:07,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:08:07,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:08:07,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:08:07,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:08:07,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 2416 transitions, 66057 flow. Second operand has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:07,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:08:07,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:08:07,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:08:24,787 INFO L129 PetriNetUnfolder]: 7951/22232 cut-off events. [2022-07-21 09:08:24,788 INFO L130 PetriNetUnfolder]: For 1309791/1309791 co-relation queries the response was YES. [2022-07-21 09:08:25,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 227077 conditions, 22232 events. 7951/22232 cut-off events. For 1309791/1309791 co-relation queries the response was YES. Maximal size of possible extension queue 1443. Compared 268098 event pairs, 894 based on Foata normal form. 6/22043 useless extension candidates. Maximal degree in co-relation 226887. Up to 6054 conditions per place. [2022-07-21 09:08:25,778 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1681 selfloop transitions, 1170 changer transitions 26/2919 dead transitions. [2022-07-21 09:08:25,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 753 places, 2919 transitions, 83203 flow [2022-07-21 09:08:25,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-21 09:08:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-21 09:08:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4046 transitions. [2022-07-21 09:08:25,781 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7506493506493507 [2022-07-21 09:08:25,781 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4046 transitions. [2022-07-21 09:08:25,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4046 transitions. [2022-07-21 09:08:25,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:08:25,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4046 transitions. [2022-07-21 09:08:25,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 57.8) internal successors, (4046), 70 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:25,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:25,793 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 77.0) internal successors, (5467), 71 states have internal predecessors, (5467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:25,793 INFO L186 Difference]: Start difference. First operand has 684 places, 2416 transitions, 66057 flow. Second operand 70 states and 4046 transitions. [2022-07-21 09:08:25,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 753 places, 2919 transitions, 83203 flow [2022-07-21 09:08:41,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 2919 transitions, 82229 flow, removed 392 selfloop flow, removed 16 redundant places. [2022-07-21 09:08:41,632 INFO L242 Difference]: Finished difference. Result has 767 places, 2647 transitions, 75353 flow [2022-07-21 09:08:41,634 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=65153, PETRI_DIFFERENCE_MINUEND_PLACES=668, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=938, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=75353, PETRI_PLACES=767, PETRI_TRANSITIONS=2647} [2022-07-21 09:08:41,634 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 699 predicate places. [2022-07-21 09:08:41,634 INFO L495 AbstractCegarLoop]: Abstraction has has 767 places, 2647 transitions, 75353 flow [2022-07-21 09:08:41,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.285714285714285) internal successors, (1161), 21 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:41,635 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:08:41,635 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:08:41,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 09:08:41,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:41,839 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:08:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:08:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash -174380209, now seen corresponding path program 16 times [2022-07-21 09:08:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:08:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829954908] [2022-07-21 09:08:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:08:41,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:08:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:08:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:41,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:08:41,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829954908] [2022-07-21 09:08:41,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829954908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:08:41,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591386831] [2022-07-21 09:08:41,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 09:08:41,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:08:41,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:08:41,897 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:08:41,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 09:08:41,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 09:08:41,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:08:41,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 09:08:41,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:08:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:42,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:08:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:08:42,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591386831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:08:42,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:08:42,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-07-21 09:08:42,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704866182] [2022-07-21 09:08:42,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:08:42,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 09:08:42,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:08:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 09:08:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-07-21 09:08:42,125 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-07-21 09:08:42,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 767 places, 2647 transitions, 75353 flow. Second operand has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:08:42,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:08:42,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-07-21 09:08:42,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:09:02,867 INFO L129 PetriNetUnfolder]: 8041/22567 cut-off events. [2022-07-21 09:09:02,868 INFO L130 PetriNetUnfolder]: For 1450774/1450774 co-relation queries the response was YES. [2022-07-21 09:09:04,068 INFO L84 FinitePrefix]: Finished finitePrefix Result has 239391 conditions, 22567 events. 8041/22567 cut-off events. For 1450774/1450774 co-relation queries the response was YES. Maximal size of possible extension queue 1471. Compared 272782 event pairs, 593 based on Foata normal form. 60/22567 useless extension candidates. Maximal degree in co-relation 239173. Up to 3910 conditions per place. [2022-07-21 09:09:04,269 INFO L132 encePairwiseOnDemand]: 65/77 looper letters, 1232 selfloop transitions, 1619 changer transitions 41/2934 dead transitions. [2022-07-21 09:09:04,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 819 places, 2934 transitions, 87542 flow [2022-07-21 09:09:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-21 09:09:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-21 09:09:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3551 transitions. [2022-07-21 09:09:04,273 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7560144773259527 [2022-07-21 09:09:04,273 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3551 transitions. [2022-07-21 09:09:04,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3551 transitions. [2022-07-21 09:09:04,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:09:04,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3551 transitions. [2022-07-21 09:09:04,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 58.21311475409836) internal successors, (3551), 61 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:04,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:04,320 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 77.0) internal successors, (4774), 62 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:09:04,320 INFO L186 Difference]: Start difference. First operand has 767 places, 2647 transitions, 75353 flow. Second operand 61 states and 3551 transitions. [2022-07-21 09:09:04,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 819 places, 2934 transitions, 87542 flow